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Honeywell Mini-AT User Manual

High performance, ptz electronic volume corrector
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Honeywell Process Solutions
Mini-AT
High Performance,
PTZ Electronic Volume Corrector
User Manual
October 2020
V 3.04
Honeywell
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Summary of Contents for Honeywell Mini-AT

  • Page 1 Honeywell Process Solutions Mini-AT High Performance, PTZ Electronic Volume Corrector User Manual October 2020 V 3.04 Honeywell...
  • Page 2 www.honeywell.com...
  • Page 3 Installation (without an Instrument Drive) ....................23 Battery Packs (Installing or Changing) ......................28 Serial Connector .............................30 LCD Diagnostic Function (Linking) ......................30 Modem, Communicating with the Mini-AT ....................31 Alarms ..............................36 Pulse Outputs (Alarms) ...........................37 Pulse Outputs (Volume) ..........................38 Mini-AT Operating Modes ........................45 Meter Reader Mode (Detailed Description) .....................47...
  • Page 4 Mini-AT User Guide Revision List 1.00 Initial Release December 1998 2.00 Format Change to larger paper Added: Audit Trail Automatic Call-in p37-38 HELP Mode LCD Diagnostic Display (linking) Messenger Modem Wiring Diagram p134 PLog Pulse Scaling Tables p46-47 Quick Start Guide...
  • Page 5 Mini-AT User Guide Introduction: The Mini-AT is a full featured, stand alone, electronic gas volume corrector. Its standard mounting is on rotary, turbine, and diaphragm meters that have a rotating shaft (instrument drive) output. The Mini-AT is also com- patible with meters that provide high or low frequency meter pulses when the appropriate interface board is installed.
  • Page 6 Mini-AT User Guide Specifications Input Volume • Dual Dry-reed switches, one pulse per each meter revolution • Uncorrected volume totalized on mechanical index, also displayable on LCD • Input pulse counting continues with dead or removed main battery Input Pressure •...
  • Page 7 Mini-AT User Guide Output Volume For data collection systems • Jumper selectable for: one Form-C or two Form-A • Jumper selectable pulse width (default = 62.5 msec.) • One mechanical (Dry-reed) switch for uncorrected volume (second switch optionally available) • SPA Board optionally available Memory •...
  • Page 8 Mini-AT User Guide JB900 Terminal Strip Connector for Modem JB 24 Backup Battery Pack (3-AA alkaline) JB 29 JB 31 JB 32 JB 30 Pulse Outputs Figure 1 Diagram of the Mini-AT board, (location of primary connections and jumpers) www.honeywell.com Page 8...
  • Page 9 Mini-AT User Guide Connector/Jumper Purpose Connection for Field Calibrator Connection for LCD Display Connection for KYZ Pulse Channels Connection for Temperature-1 input Connection for local Serial Port Connector Connection #1 for Main Battery Connection #2 for Main Battery Connection for UncVol Switch Input Connection for PCor input Connection for Aux.
  • Page 10 Mini-AT User Guide Quick Start Guide The following steps will guide you to getting the Mini-AT instrument installed and operational. 1. Carefully unpack the instrument and verify that there is no shipping damage, also verify that nothing is missing from the shipment.
  • Page 11 9. Use the “Disconnect Link” function in the Instrument menu to return the Mini-AT back to corrector mode. Remove the I/O cable from the back of the instrument. 10. Position the Mini-AT on the meter, making sure that the wriggler is aligned properly. Bolt the Mini-AT to the meter using the mounting bolts and gasket provided.
  • Page 12 Mini-AT User Guide assembly and shift the lower bevel gear to the proper location. Bevel Gear DOWN for CW Bevel Gear UP for CCW 12. Connect the pressure line to the 1/4" NPT fitting at the back of the instrument.
  • Page 13 Base pressure (PSIA) Each increment of meter pressure represents a different pressure factor. As the flowing gas pressure (Pm) changes, the Mini-AT automatically applies the pressure factor (Fp) to the metered volume (Vm). Temperature Factor Ft The temperature factor (Ft) to apply to metered volume is expressed by the Charles’ Law relationship as follows: Base temperature, deg.
  • Page 14 The Mini-AT automatically applies the supercompressibility factor and therefore the equation for total volume correction which the Mini-AT applies to metered volume, is expressed as: Vb = Vm x Fp x Ft x (Fpv)
  • Page 15 Mini-AT User Guide How the Mini-AT Works The Mini-AT is a dedicated microcomputer that uses precision sensors to measure gas pressure and temperature and corrects metered volume. The electronic circuits are powered by the battery pack located in the case door. The battery voltage is regulated to the various voltages required by the remaining circuits.
  • Page 16 The PCor pressure sensing system incorporates a precision strain gage pressure transducer, located inside the Mini-AT enclosure with a 1/4" NPT female case connection. A valve kit with shut-off valve, tubing and fittings is optionally available to make the pressure connection to the meter/pipeline. A plug-in cable is used to make the connection from the pressure transducer to the main circuit board at J10.
  • Page 17 The LCD (Liquid Crystal Display) normally displays the corrected volume with 4, 5, 6, 7, or 8 digits. The LCD can be configured to display any Mini-AT item. The LCD is also used to indicate alarm conditions and also to display the items configured into the Meter Reader List.
  • Page 18 The Mini-AT continues to recognize meter input pulses while in the Meter Read, Level-1, and Level-2 Modes. Upon exiting any serial link access, the Mini-AT will perform a Full Wake-up just before returning to the Corrector Mode. Following a meter reader access, the instrument will return to the Corrector Mode;...
  • Page 19 (see figure 9 on page 28). Plug in the memory battery cable connector at J26. At this time, the Mini-AT should be displaying digits on the LCD (probably all zeros) and the unit is ready for functional checks.
  • Page 20 Mini-AT User Guide Volume Function Check While in the Corrector Mode, note the corrected volume reading on the LCD. Rotate the index input wriggler in one direction for ten (10) revolutions. Verify that the volume has increased by an expected amount. With zero applied pressure and at room temperature, the additional corrected volume should be essentially equal to the meter index rate, times the number of turns (10) of the wriggler.
  • Page 21 A reversing gear in the Universal Mounting Bracket (UMB) permits either clockwise (CW) or counterclock- wise (CCW) meter rotation to drive the Mini-AT. Before installing the Mini-AT, note whether the meter’s drive rotation is CW or CCW. The Mini-AT should be configured to match the meter rotation. In order to check the instrument rotation: •...
  • Page 22 • Use the supplied spline wrench to loosen the setscrew in the lower bevel gear. (The spline wrench can be found inside the Mini-AT near the door latch.) • Shift the gear down against the cross bar (CW) or up against the upper gear (CCW) in order to achieve the proper gear setting.
  • Page 23 Mini-AT User Guide Installing a Mini-AT without an Instrument Drive The Mini-AT can be configured to accept low frequency meter input pulses directly from a meter or Model 210/212 pulse transmitters (or any other low frequency pulse source) if a RSI board is installed.
  • Page 24 Mini-AT User Guide Form A Terminal Single Switch Dual Switch TB1-1 SW1-NO SW1-NO TB1-2 TB1-3 SW1-COM SW1-COM TB1-4 TB1-1 SW2-NO TB1-5 TB1-6 SW2-COM TB1-7 Cable Shield Cable Shield Form C Terminal Single Switch Dual Switch TB1-1 SW1-NO SW1-NO TB1-2 SW1-NC...
  • Page 25 Mini-AT User Guide 2) High Frequency Input Board The High Frequency Input Board (HFI board, p/n 40-1913), must be installed when attempting to receive pulses from a high frequency meter. Companion software and interface cable are available for configuring and testing the HFIB. Refer to Table 2 (below) for information on selecting the proper jumpers and Table 3 (next page) for wiring connections when installing the HFI board.
  • Page 26 Mini-AT User Guide TB1 on the HFI board is used to connect the turbine meter coil wires. The wires must be connected as indicated in Table 3 below: TB1 Label: TB1 Position: Funtional Description: Low-level input signal, low side Either coil...
  • Page 27 Mini-AT User Guide Battery Cover (B) Slotted Screw (A) Numeric Display Ribbon Cable Spring Clip (D) Inside Case Door Figure 7 Case Door Battery Hanger Plate Battery Pack (C) Back Plate Battery Cable Inside Case Door Figure 8 Page 27...
  • Page 28 Mini-AT User Guide Installing or Changing Battery Packs The standard power supply for the Mini-AT is an alkaline receptacle pack (40-1865) for six replaceable D-cell batteries (batteries not included). The battery pack is mounted inside of the instrument’s case door (see figure 6).
  • Page 29 LCD goes blank. At this point plug in the main battery, then the backup battery. The Mini-AT is now fully powered. A low voltage battery alarm will occur when either the main battery or the backup battery runs low on power.
  • Page 30 Fig. 9 Serial Connection to Mini-AT LCD Diagnostic Function (Linking) Beginning with firmware version 6.5121, the Mini-AT will display additional characters on the LCD to let the user know the status of the serial link. Examples are below. Display Description...
  • Page 31 The Mini-AT is shipped with a jumper across two pins of JB900 (located in the top, central portion of the main board). The jumper must be on pins 2 and 3 to enable modem communications through terminal strip TB2 (see Table 4).
  • Page 32 Otherwise the instrument will not call-in again. The Mini-AT can also be configured to call-in for both the scheduled and alarm case. In order to configure the instrument for this method the following items must be set: Call-In Trigger 3 - Alarm &...
  • Page 33 Mini-AT User Guide Power Sharing Cable 40-2390 Figure 10 Mini-AT to MI Modem Connections Power Cable 40-2565-10 Figure 11 Mini-AT to Messenger Modem Connections Page 33...
  • Page 34 Mini-AT User Guide External Modem Note: Some External Modem Connections will require wiring Rx to Rx and Tx to Tx to Communicate. Check the modem manufacturers documentation for the proper wiring. Figure 12 Mini-AT to External Modem Connections www.honeywell.com...
  • Page 35 Installation Plug the red/black pigtail connector into either of the battery sockets (J7 or J8) of the Mini-AT. Plug the white/ black pigtail connector into either modem socket (J3 or J4). Lastly, plug the power connector from the battery pack of power supply into the power sharing cable board.
  • Page 36 Mini-AT. Clearing Alarms By default, the Mini-AT is configured to allow manually clearing of alarms using a Mag Wand. This feature is enabled by setting Item Code 128 (Mag Alarm Acknowledge) to “Yes”. To clear all instrument alarms, scroll through the alarm codes until the LCD displays “E.E.E.E.E.E.E.E”, then simply allow the display to timeout,...
  • Page 37 Alarm Pulse Outputs The Mini-AT will generate a Form-A, 100 millisecond wide pulse on every new alarm, and if RBX is enabled, on every alarm automatically cleared. The alarm pulse is available at terminals A- and A+ of TB1 and TB2.
  • Page 38 Time (Time can only be used with a Form-A output to provide a reset switch at the top of each hour). Use Mini-AT Link or MasterLink32 software to select the pulse type at Item Codes 093 and 094. See pages 43-44 for configuration examples.
  • Page 39 Mini-AT User Guide Jumpers JB29, JB30, and JB31 must be set correctly in order for the Mini-AT to provide a Form-A pulse output. Figure 9 will assist with locating these jumpers on the main board. Install shorting jumpers at JB29 pins 1-2 and 5-6 to obtain pulse widths of 62.5 milliseconds or substitute with shunt resistors to obtain other pulse width values.
  • Page 40 Mini-AT User Guide Jumpers JB29, JB30, and JB31 must be set correctly in order for the Mini-AT to provide a single Form-C pulse output. Figure 9 will assist with locating these jumpers on the main board. 1) Install shorting jumpers (40-2467) at JB29 pins 2-3 and 6- 7...
  • Page 41 Mini-AT User Guide Output Pulse Specifications All outputs are isolated from ground and each other. Outputs are rated for DC only, from 3.0 volts to 30.0 volts. Observe polarity. The corrected volume pulser circuits will sink up to 15 milliamperes (DC) for Form-C outputs and up to 5 milliamperes (DC) for Form-A outputs.
  • Page 42 Mini-AT User Guide 0.0 Sec. TIME 1.0 Sec. TIME Sec. FORM-C ITEM 115 = .0625 FORM-C ITEM 115 = .500 FORM-C ITEM 115 = 1.00 FORM-C ITEM 115 = .125 FORM-C ITEM 115 = .250 FORM-A ITEM 115 = .0625 KY, PULSE WIDTH = .0625 Sec.
  • Page 43 UncVol Output Pulse Code 0.0625 To configure the Mini-AT that is programmed for corrected and uncorrected volume in CCF (100 CuFt) to output a CCF volume pulses via the two Form-A channels, configure the following items: Item # Description Value...
  • Page 44 No Out Output Pulse Code 0.0625 To configure the Mini-AT that is programmed for corrected volume in CCF (100 CuFt) to output a CCF corrected volume pulses via the single* form C channel, configure the following items: Item # Description...
  • Page 45 Corrector Mode. If the instrument is in Meter Reader Mode, it must be brought back to Corrector Mode to enter Level 1 or Level 2 Access Mode. The same is true if the Mini-AT is in Level 1 or Level 2 Access Mode, the instrument must be brought back to Corrector Mode to enter Meter Reader Mode.
  • Page 46 Level 2 Access Mode The Level 2 Access Mode allows the factory or the user to configure the Mini-AT instrument. Level 2 Access is considered a higher level access to all instrument functions and is gained through the use of a laptop computer.
  • Page 47 Mini-AT User Guide A Mercury Modem or Messenger Modem may be installed in the Mini-AT enclosure and share power from the main battery (see wiring diagram on page 135. Modem operation is supported by a second serial port, TB2. Modems are generally used to transfer data (audit trail) from a remote location to a host computer. All RS-232 devices require Mercury's Serial Protocol for Mini-AT in the communication driver.
  • Page 48 Mini-AT User Guide Default Meter Reader Display While in the Meter Reader Mode, the Mini-AT continues to recognize and accumulate meter input pulses. Also, 1-minute and 10-minute Time-outs are used to automatically return the instrument to the Corrector Mode. By design, the Corrector Mode requires much less electrical energy than all other operating modes.
  • Page 49 While the last meter reader item is displayed, the next mag wand input will cause the LCD to go blank for 1- second while the instrument processes any stored uncorrected input pulses, prior to returning to the Corrector Mode Listed below is the configuration of item codes required to create the default Mini-AT Meter Reader List. Item...
  • Page 50 Mini-AT User Guide CORRECTOR MODE ALARMS MAG WAND PRESENT? INPUT DISPLAY TEST ALARMS CODE DISPLAY 1 MINUTE MAG WAND TIME-OUT INPUT 1 MINUTE MAG WAND TIME-OUT INPUT UNCORRECTED VOLUME ADDITIONAL ALARMS? 1 MINUTE MAG WAND 1 MINUTE TIME-OUT INPUT TIME-OUT E.E.E.E.E.E.E.E...
  • Page 51 Mini-AT User Guide The meter reader list is divided into four sections and can only be displayed in the following order: MAG LIST SECTIONS DESCRIPTION Alarm Codes (Displayed only if any alarms are active) Mag List 1 (Item codes 130-135)
  • Page 52 Mini-AT User Guide technician to monitor the gas pressure without attaching a portable pressure gauge. Second, the meter technician can attach a Mercor Mini Field Calibrator to J2 on the main circuit board and perform a single point pressure or temperature calibration. Hence, the instrument can be calibrated without the need of a laptop computer.
  • Page 53 Mag List 2 consists of twelve item codes (075-086) which define what items will appear in section 4 of the meter reader list. The factory default items are listed below, however any Mini-AT item code can be placed into Mag List 2. If less than twelve items are required, place the value “255” into the item code...
  • Page 54 Mini-AT User Guide Item Item Legend Selected Description Code# Item Mag List 2 Item 1 # Site ID Mag List 2 Item 2 # High Resolution CorVol Mag List 2 Item 3 # Base Pressure Mag List 2 Item 4 #...
  • Page 55 Mini-AT User Guide CORRECTOR MODE ALARMS CODE ALARMS DISPLAY AS OUTLINED MAG WAND PRESENT? IN FIGURE 12 INPUT 1- MINUTE 8.8.8.8.8.8.8.8 DISPLAY TIME-OUT TEST MAG WAND 1- MINUTE 1 2 3 4 5 6 7 8 SITE ID TIME-OUT MAG WAND...
  • Page 56 This difference will allow the user to determine if the LCD is displaying is a Mag List 1, Mag List 2 or Live item. The Item Number Enable provides eight possible options. Use Mini-AT Link software to select which mag list is to include the item code identification.
  • Page 57 Mini-AT User Guide CORRECTOR MODE ALARMS CODE ALARMS DISPLAY AS OUTLINED MAG WAND PRESENT? IN FIGURE 12 INPUT 1- MINUTE 8.8.8.8.8.8.8.8 TIME-OUT MAG WAND 0 1 - - - 2 0 0 1 2 3 4 5 6 7 8...
  • Page 58 The Mini-AT will ‘wake up’ once a minute to check and see if the expectation time has been ex- ceeded. If the expectation time is exceeded and there has not been a switch input, the instantaneous dial and flow rates are set to zero.
  • Page 59 6. Item Code 234: Battery Wake Cycles The Mini-AT will store 140 days of hourly information for these ten items. After 140 days, the earliest information will begin to be overwritten by new information. The Audit Trail can be downloaded using the Mini-AT Link software (or MasterLink32).
  • Page 60 Mini-AT User Guide Instrument Calibration There are two methods to calibrate the gas pressure and gas temperature transducers in the Mini-AT. The first method requires the use of a computer and Mini-AT Link (or MasterLink32) software. The second method requires the use of the Mercor Mini Field Calibrator. Both methods require a known value of the applied pressure and/or temperature as a reference.
  • Page 61 Item Code 138 (or 411) matched the transducer serial number label and Item Code 112 (or 407) is set for Gauge type transducer. Refer to figure 19 when pressure calibrating the Mini-AT. Since the two- point calibration is mostly a software function, references to the appropriate sections in the Mini-AT Link (and MasterLink32) software are included.
  • Page 62 The program will continue to loop back to the live pressure reading. Obtain as many pressure samples as necessary until an acceptable pressure reading is displayed. 11) If the Mini-AT's zero pressure reading is acceptable, click the “Span” button to change to the Span Calibration sequence.
  • Page 63 7) If a communications link has not yet been established, the software will attempt to link to the Mini-AT. If the access code of the Mini-AT is not the default of ‘33333’, a box will appear requesting the user to input the Instrument Access Code. Enter the access code when this box appears.
  • Page 64 Mini-AT User Guide 11) If the Mini-AT's absolute pressure reading is acceptable, click the “Span” button to change to the Span Calibration sequence. 12) The screen title should have changed to; "Pressure Span Calibration". At this point, the software is waiting to sample the applied pressure that exceeds the zero reference pressure by at least 50% of the rated pressure transducer range.
  • Page 65 If the two pressure readings agree, the instrument is assumed to be calibrated. If both pressure values do not match, the Mini-AT's pressure reading may be adjusted until it agrees with the reference pressure.
  • Page 66 Mini-AT's pressure transducer. Note: If the Mini-AT is a dual pressure model, make sure to verify if using the PCor (P1) or PLog (P2) Transducer. 1) Plug the Mercor Mini Field Calibrator cable onto the main circuit board connector J2. Make certain all six pins are fully inserted into the black plastic cable connector.
  • Page 67 6) If the pressure reading is within tolerance, proceed to step 9. 7) If the Mini-AT's displayed pressure reading is greater than 0.00, press the DOWN button on the Mercor Mini Field Calibrator until it reads 0.00. If the Mini-AT's displayed pressure reads negative (ex.
  • Page 68 2-Point Temperature Calibration 2-Point Temperature Calibration (Procedure) Refer to figure 21 when temperature calibrating the Mini-AT. Since the two-point calibration is mostly a software function, references to the appropriate sections in the Mini-AT Link software are included. 1) Prepare an agitated ice bath and a container of heated water.
  • Page 69 Obtain as many temperature samples as necessary until an acceptable temperature reading is displayed. 11) If the Mini-AT's zero temperature reading is acceptable, click the “Span” button to change to the Span Calibration sequence. 12) The screen title should have changed to; "Temperature Span Calibration". At this point, the software is waiting to sample a temperature that exceeds the zero reference temperature by at least 10% of the instruments's temperature range, i.e.
  • Page 70 If the two temperature readings agree, the instrument is assumed to be calibrated. If the two temperature values are different, the Mini-AT's temperature reading may be adjusted until it agrees with the reference temperature.
  • Page 71 Refer to figure 22 during the single-point calibration procedure. Before starting the procedure, unlock and open the Mini-AT's door. Locate connector J2 near the top center of the main circuit board. 1) Plug the Mercor Mini Field Calibrator cable onto the main circuit board connector J2. Make certain all six pins are fully inserted into the black plastic cable connector.
  • Page 72 UP button until they agree. 9) Press the ENTER button to 'lock-in' the temperature reading. Note; The Mini-AT's LCD will go blank for a second while the instrument is computing the new T-Zero value. When completed, the LCD will return to a live temperature display and further adjustments are possible, if needed.
  • Page 73 Mini-AT User Guide Main Board Jumpers The Mini-AT has several features and functions that are controlled by installing jumpers on header pins. Table 9 lists all main board jumpers with their factory default settings. Jumper Jumper Default Name Configuration (Default) Purpose 1 2;...
  • Page 74 Pins 3 & 4 of Jumper Block 24 (JB24) provides a means to Force Factory Defaults. With a jumper across pins 3 & 4, the Mini-AT will be configured to factory defaults after an instrument RESET (Unconfigured). An instrument RESET is defined as: Unplugging the main and backup batteries from the main board (for at least 20-seconds) and then, plug-in both batteries.
  • Page 75 Flash Memory. If there is no jumper across pin 5 & 6, firmware upgrades will not be permitted. As a check, Item Code 268 can be read by Mini-AT Link to determine what jumpers are installed on JB24. By default, the jumper is installed.
  • Page 76 Mini-AT User Guide Event Logger Lock Jumper Pins 9 & 10 of Jumper Block 24 (JB24) provides a hardware requirement when attempting to lock the Event Logger through software. A jumper across pins 9 & 10 is required to allow host software to set the ‘lock’...
  • Page 77 Mini-AT User Guide Firmware Reprogramming Mini-AT firmware (instrument operating program) is stored in flash memory. Adding new features and capabilities to the instrument is simply a matter of uploading a file containing a newer version of firmware through the serial port connection. There are no EPROM chips to be removed or plugged into sockets.
  • Page 78 Mini-AT User Guide Before Upgrading Firmware (saving instrument data): 1. Open MasterLink32 software. 2. Connect the Serial Cable (40-1629) from round connector on the back of the Mini-AT to the computer COM port. M E R C U R Y...
  • Page 79 Mini-AT User Guide 4. MasterLink will establish a link with the Mini-AT and display a dialogue box. Type in a name for the item file and click the Save button. MasterLink will then save all items to a file with the selected filename.
  • Page 80 8. Select the Last N Days radio button from the option screen and type 140 into the blank Click OK and MasterLink will read the last 140 days of Audit Trail information from the Mini-AT. 9. After the download is complete, disconnect the link and exit MasterLink32 software.
  • Page 81 Mini-AT User Guide Procedure to upgrade Mini-AT firmware: 1. Connect the Serial Cable (40-1629) from the Mini-AT port to the computer COM port. Make Sure that pins 5 and 6 are jumpered on JB24. (See page 75 for more information.)
  • Page 82 Mini-AT User Guide 5. After clicking the gas pump button, a dialogue box will appear. Select the Mini-AT firmare file (matXXXXX.txt) and click continue. 6. At this point the software will display a warning about downloading instrument data. Since this has already been completed in the pre-firmware upgrade procedure, press no to continue www.honeywell.com...
  • Page 83 Mini-AT User Guide 7. The dialogue box from step 5 will reappear. Click Start Upload to begin sending the Mini-AT firmware. 8. Firmware Manager will display the progress of the upload. When the upload is completed a new dialogue box will appear stating that the upgrade was successful. Click OK.
  • Page 84 Mini-AT User Guide After Upgrading Firmware (restoring instrument configuration): 1. Open MasterLink32 software 2. Connect the Serial Cable (40-1629) from the Mini-AT port to the computer COM port. M E R C U R Y PC Running MasterLink32 version 3.30 M I N I - A T 4.
  • Page 85 Mini-AT User Guide 5. Select the Item File that was saved in step 4 of the Pre-Firmware upgrade procedure from the list and click the Open button. 6. From the Transfer Menu, select Send Cal Items...
  • Page 86 Mini-AT User Guide 7. MasterLink will display a warning message stating that “Transducer coefficients should not be altered.” Click the Yes button to continue. MasterLink will now display a Calibration Options window. Make sure all boxes are checked and click OK to continue.
  • Page 87 (or alternative power source) before plugging in the backup battery. 5) Plug in the backup battery into the main board at connector J26. The Mini-AT’s LCD should display “00000000” indicating that the instrument is operating in the Corrector Mode and the settings have reverted back to factory default values.
  • Page 88 LCD display will be blank once the batteries are unplugged. In order to bring the Mini-AT out of a complete shutdown, simply plug in the main battery and the backup battery. It will be necessary to reset the date, time, corrected volume, uncorrected volume and other items that were erased as a result of the complete shutdown.
  • Page 89 Items which make up the operating parameters, codes, alarms, calibration references , voltage levels, and other information relative to operation or configuration of the Mini-AT are listed below. Item code information can only be changed using Mini-AT Link (or MasterLink32) software. Refer to the Mini- AT Link Software Manual for more information.
  • Page 90 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— PCOR PRESS MAX Highest PCor pressure measured by the unit since last manually reset. PCOR PRES HILIM High limit for PCor pressure, initiates alarms (items 105 and 145), if exceeded. Default = 099999.99...
  • Page 91 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— 2 PREV PCOR CAL ZERO The previous value of item 018, updated on each PCor Pressure Zero Calibration. Default = 0.0000 PCOR CAL SPAN The most recent span value for the pressure transducer, obtained during a PCor-Span calibration.
  • Page 92 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— GAS TEMP HILIM High limit for temperature, initiates alarm ( items 106 and 146) if exceeded. Also used with Item 004. Default = 165.00 REF TEMP #1 The temperature value used during the most recent TZERO calibration.
  • Page 93 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— TCAL SPAN The most recent span value for the temperature transducer, obtained during a T-Span calibration. The value is normally very close to 1.0000 and is recalculated on each Temperature Span Calibration.
  • Page 94 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— AUX COR FACTOR Factor to provide for other possible corrections to metered volume, i.e. Water Vapor Content, Therms, etc. If not applicable, set to 1.0000. Default = 1.0000 UNSQUARED SUPER AGA 3 / NX-19 or AGA 8 Supercompressibility factor calculated at the most recent wake-up from values at items 008, 026, 053, 054 and 055, if item 110 is set for LIVE.
  • Page 95 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— PULSER A SCALING Scaling factor that determines the volume per pulse for channel A pulse outputs when item 093 is set to CorVol, UncVol or PcorVol. Default = 2.0000 PULSER B SCALINGScaling factor that determines the volume per pulse for channel B pulse outputs when item 094 is set to CorVol, UncVol or PcorVol.
  • Page 96 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— SERIAL NUMBER Factory assigned Instrument Serial Number. Example: 09901234 09901234 - disregard the leading zero. 09901234 - 2 digit year of manufacture. 09901234 - 5 digit sequence # during the year of manufacture.
  • Page 97 075 will be the first Mag Read Item to be displayed in the Meter Reader List. Any Mini-AT item number may be entered as a Mag Read Item. Default = 200 (Site ID number) MAG LIST 2 ITM 2 Item number of the next Mag List #2 item.
  • Page 98 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— MAG LIST 2 ITM 4 Same as Item 76 above. Default = 014 (Atmospheric Pressure) MAG LIST 2 ITM 5 Same as Item 76 above. Default = 025 (Press. Transducer Range) MAG LIST 2 ITM 6 Same as Item 76 above.
  • Page 99 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— TEMP UNITS CODE Code (0-3) that selects the unit of measure for Gas Temperature (026) and other temperature related items. Select: 0 - Degrees F------Default 1 - Degrees C 2 - Degrees R...
  • Page 100 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— PULSR A VOL CODE Code (0-4) that selects the type of pulse information to be transmitted out Pulser Channel A. PULSR B VOL CODE Code (0-4) that selects the type of pulse information to be transmitted out Pulser Channel B.
  • Page 101 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— BATTERY LOW This item (099) indicates if a low voltage alarm for the main battery was generated. During a wake-cycle, if the measurement for item 048 (BATTERY VOLTAGE) is a value less than the value at item 049 (BATTERY LOLIM V), an alarm is initiated and is indicated by placing dots on the LCD and “11111111”...
  • Page 102 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— INDEX SW#2 FAULT This item (103) indicates if an alarm for index switch #2 was generated. If index switch #2 fails to provide an input meter pulse within four meter revolutions, an alarm is initiated and is indicated by placing dots on the LCD and “11111111”...
  • Page 103 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— TEMP OUT RANGE If item 106 is programmed into item 072, 073 or 074, this item (106) indicates if a high or low temperature alarm was generated. During a wake-cycle, if the measurement for item...
  • Page 104 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— FIXED TEMP FACT Code (0 - 2) that selects Live or Fixed Factor Temperature. When enabled for Fixed Factor (code 1), the Temperature Factor entered at Item 045 will be used for temperature correction, instead of a live calculation based on the input from the temperature probe.
  • Page 105 Form-A output is 62.5 milliseconds. Any remaining time is off-time. The pulse width from a Mini-AT may be changed by installing shunt resistors at JB29. Note: If the Form-A pulse width is changed from 62.5 milliseconds, item 115 must be set to a value equal to or greater than twice the pulse width.
  • Page 106 This function is a carry-over from the ECAT/Mini as a power conservation feature on fast meters having fairly constant pressures and temperatures. The significance of this feature in the Mini-AT is less since the power drain on the battery is less. Default = 1...
  • Page 107 Item number of the first item displayed in the Meter Reader List, unless there are active alarms. Active alarms are always displayed prior to the selected mag list items. Any Mini-AT item may be entered as a mag list item. Enter a 255 for this item if the Mag List 1 function is to be disabled.
  • Page 108 List for Mag List 1. Default = 002 (Uncorrected Volume) MAG LIST 1 ITEM 3 Item number of the third Mag List 1 item. Any Mini-AT item may be entered. Entered a 255 at this item to indicate the End-of-List for Mag List 1.
  • Page 109 Default = 00000000 SERIAL LINK CODE Code (0 - 2) to define the behavior of the instrument’s RS-232 serial data transfer with Mini-AT LINK and other 3rd-party software Select: 0 - Two Way (Read and Write) Default 1 - Read Only...
  • Page 110 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— PCOR PRESS LOW ALARM This item (143) indicates if a low PCor pressure alarm was generated. During a wake cycle, if the measurement for item 008 (PCor GAS PRESSURE) is a value less than the value entered at item 011 (PCor PRES LOLIM), an alarm is initiated and is indicated by placing dots on the LCD and “11111111”...
  • Page 111 Specific Gravity, %N and %CO . The file must be transferred to the connected Mini- AT using “Transfer” | “Send AGA8 Factors” with Mini-AT Link Software. An AGA-8 file with defaulted values for Specific Gravity = 0.6000, %N = 0.0000 and %CO = 0.0000 is provided with each Mini-AT Link...
  • Page 112 By default, the Event Logger is ‘Unlocked’, meaning old event records begin to be overwritten after 500 event changes. The Event Log Lock can only be enabled with Mini-AT Link software when the Event Logger Lock Jumper is installed at JB24, pins 9 &...
  • Page 113 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— RBX ALARM ENABLE Code (0-1) to determine the type of instrument alarm operation. When the RBX function (Report By Exception) is disabled, all instrument alarms operate as in previous versions of firmware, i.e., alarms stay active until manually cleared.
  • Page 114 Select: 0 - Standard------Default 1 - No Time-out Error TIMEOUT DELAY1 The time (in seconds) the Mini-AT waits for the host computer to send the protocol control character “ENQ” during instrument sign- on before issuing an error “21” (timeout error). This function is...
  • Page 115 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— REPORT TRIGGER 10 When activated, this trigger will cause an audit trail entry to time- stamp Alarms Cleared, either manually or automatically by RBX. The Clear Alarm action will also provide an alarm output pulse and change item 176 (RBX ALARM EVENT) from “00000000”...
  • Page 116 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— PREDAY AV PCOR P Yesterday’s Daily Average PCor Pressure (expressed in the pressure units selected at item 087), i.e., the daily average PCor pressure that is one ‘Gas Day’ old at the time the instrument was accessed.
  • Page 117 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— DAILY ENERGY Same as item 140 (Energy), except this value is the running total for the current Gas Day, which is zeroed and begins a new calculation at the time entered at item 205. Therefore, the value displayed during instrument access is the most recent calculated value for the current gas day.
  • Page 118 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— MAX DIAL RATE The highest Instantaneous Dial Rate (item 218) since last manually reset. Default = 0.00 MAX FLOW RATE The highest Instantaneous Flow Rate (item 209) since last manually reset. Default = 0.00 DATE (DD-MM-YY) The calender date displayed with the first two digits as ‘DAY’, the...
  • Page 119 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— TIME Real Time Clock that displays hours, minutes, and seconds in 24-hour “military” time, i.e., 14: 30: 02 would be 2 seconds past 2:30 PM. Default = 12:00:00 DATE A numeric field indicating either Month-Day-Year (MM-DD-YY),...
  • Page 120 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— AVG FLOW RATE Calculated average rate of flow for Corrected Volume (000) for the time interval selected at item 202, expressed in CorVol units per hour. Example: If the COR VOL UN CODE (item 090) is 7 (CCF)
  • Page 121 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— PCOR INTVL LO P Lowest PCor Gas Pressure (item 008) measured during the Time interval selected at item 202. The value at item 214 is initialized (re-zeroed) at the beginning of each new log interval.
  • Page 122 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— DAILY CORVOL ALM During a wake cycle, if the computed value for item 223 (DAILY CORVOL) is greater than the value at item 221 (DAILY CORVOL LIMIT), an alarm is initiated and is indicated by placing dots on the LCD and “11111111”...
  • Page 123 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— OPTN REP ITEM 1 The last six of ten, user selectable Audit Trail Report Items that can be placed in Audit Trail memory. The use of these six items is optional. If any of these six items are other than 255, the instrument is forced to store the maximum of ten audit items per record.
  • Page 124 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— For items 235 thru 239 and 242, code (0 - 1) to activate or deactivate the above listed audit trail Report Triggers. If activated, an audit trail record will appear in the audit trail log at the occurrence of each particular type of trigger.
  • Page 125 Mini-AT User Guide Default = 00000000 Item Item Name Description ———————————————————————————————————————— MO PK DAY DATE The date the current month Peak Day CORVOL (245) occurred. Format: Determined by item 262 Default = 01-01-98 PREMO PK HR CRVL The highest hourly CORVOL of the previous ‘Gas’ month.
  • Page 126 Select: 0 - End of Interval Default 1 - Start of Interval JUMPER SETTINGS The Mini-AT incorporates jumpers on the main circuit board as another means of configuring some modes of operation. Since the jumpers are physical entities, they cannot be changed via software.
  • Page 127 MODEM BAUD RATE Code (0 - 7) to select the communication’s baud rate for the modem at the Mini-AT, wired into terminal strip TB2. A communication error may result if the baud rate at item 272 does not match the baud rate of the connected modem. (Baud rate jumpers JP4 and JP5 on the Mercury Modem board should be set to match the baud rate at item 272.
  • Page 128 Mini-AT User Guide Default = 0.00 Item Item Name Description ———————————————————————————————————————— MAX DIAL RATE The highest value of Inst Dial Rate (item 218) since the last manual reset. Default = 0 MAX DIAL TIME The time when Max Dial Rate (item 281) occurred.
  • Page 129 Mini-AT User Guide Default = 0.00 Item Item Name Description ———————————————————————————————————————— MAX GAS TEMP The highest value of Gas Temperature (item 026) since the last manual reset. Default = -40.00 MAX TEMP TIME The time when the Max Gas Temp (item 293) occurred.
  • Page 130 The coefficient values are determined by Mercury Instruments at the factory. Note: A Mini-AT will not measure pressure accurately if the default coefficients are used. www.honeywell.com...
  • Page 131 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— CALL-IN TRIGGER Selection to determine what activity will cause an instrument call-in. Select: 0 - No Call-in 1 - Alarm Call-in only Default 2 - Scheduled Call-in only 3 - Alarm & Scheduled Call-In SCH CALL-IN DATE Date of next scheduled call-in.
  • Page 132 The coefficient values are determined by Mercury Instruments at the factory. Note: A Mini-AT will not measure pressure accurately if the default coefficients are used. www.honeywell.com...
  • Page 133 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— RATE LOW LIMIT Limit for Low Flow Rate Alarm (item 461). Default = 0.0 INSTRUMENT CONFIG Item to enable or disable Plog Pressure Logging. Select: 2 - PLog off Default 6 - PLog on PLOG SAMPLE INTVL.
  • Page 134 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— PLOG TRANSDUCER RGE The upper range limit of the PLog pressure transducer, always expressed in PSI. Default = 100.00 PLOG REF PRESS #1The PLog pressure value used during the most recent PLog ZERO calibration.
  • Page 135 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— PLOG AVG PRESS Calculated PLog average pressure for the time interval selected at item 202. The average value is time weighted over the PLog SAMPLE INTERVAL selected at item 401. Default = 0.00...
  • Page 136 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— PLOG PRESSURE HIGH This item indicates if a PLog high pressure alarm was generated. During a PLog sample (Item 401), if the measurement for item 420 (PLog GAS PRESSURE) is greater than the value entered at item 455 (PLog PRESS HILIM), an alarm is initiated and is indicated by placing dots on the LCD and ‘11111111’...
  • Page 137 Mini-AT User Guide Item Item Name Description ———————————————————————————————————————— ZERO RATE DETECTION Parameter to disable/enable zero flow rate detection as well as apply a scaling factor to the calculated expectation time period. A value of ‘0’ disables Zero-Flow Detection. A value greater than zero will enable Zero-Flow Detection.
  • Page 138 Mini-AT User Guide Mini-AT Door www.honeywell.com...
  • Page 139 Mini-AT User Guide Mini-AT Door Parts List Item Qty Part # Description 1 40-2013 Ground Wire Assembly 1 20-8283 Nameplate Assembly 1 20-8746 Window Display Assembly 1 20-4295 Latch, w/Hasp 1 20-8788 Door, Drilled 1 20-8285 Window, Lexan 1 20-8286...
  • Page 140 Mini-AT User Guide Meter Mount Mini-AT www.honeywell.com...
  • Page 141 Mini-AT User Guide Mini-AT Meter Mount Parts List Item Qty Part # Description 1 20-6882 Magnetic Disc Assembly 1 20-7283 U.M.B. Assembly 1 40-1576 Cap & Chain Assembly 1 40-1699-3 Input Switch Board 1 40-1728 Cable, Internal RS-232 1 40-2041...
  • Page 142 Mini-AT User Guide Wall Mount Mini-AT www.honeywell.com...
  • Page 143 Mini-AT User Guide Mini-AT Wall Mount Parts List Item Qty Part # Description 1 40-1576 Cap & Chain Assembly 1 40-1728 Cable, Internal RS-232 1 40-1939 Cable, RSI Board 1 40-2016 Remote Switch Interface Board-Mini 1 40-2453 Transducer Assembly 1 40-2335...
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  • Page 151 • The capture, modification or deletion and loss of data. Caution: The caution warns you of possible damage to property and provides instructions to avoid damage to Mini-AT. Security Control Recommendations: • Device Isolation: o Isolated Solution Restrict physical access to the device and other network devices in the network.
  • Page 152 Honeywell investigates all reports of security vulnerabilities affecting Honeywell products and services. For details on Honeywell security policy, visit https://www.honeywell.com/product-security. To report a potential security vulnerability against any Honeywell product, please follow the instructions at: https://www.honeywell.com/product-security under the Vulnerability Reporting section.
  • Page 153 Battery Packs (Installing or Changing) To install batteries in Alkaline Receptacle Pack Install or replace disposable battery pack Backup Battery To power the Mini-AT: Calibration 2-Point Pressure Calibration (Defined) 2-Point Pressure Calibration Defined (Gauge Transducers) 2-Point Pressure Calibration Procedure (Gauge Transducers)
  • Page 154 Gaining Access To Meter Reader Mode Default Meter Reader Display Mag List 1 Live Parameters Display Mag List 2 Item Number Enable Mini-AT Operating Modes Corrector Mode Meter Reader Mode Level 1 Access Mode Level 2 Access Mode Modem, Communicating with the Mini-AT www.honeywell.com...
  • Page 155 Quick Start Guide Receiving the Mini-AT Function Check Pressure Function Check - Gauge Transducer Pressure Function Check - Absolute Transducer Temperature Function Volume Function Check Report By Exception (RBX) Serial Connector Shutdown, Putting the Mini-AT into Specifications Unconfiguring the Mini-AT...
  • Page 156 Find Out More: To learn more about Mercury Instruments products, contact your Honeywell Process Solutions representative, visit www.mercuryinstruments.com or call 513-272-1111. Automation and Control Solutions Honeywell Process Solutions 3940 Virginia Ave. Cincinnati, OH 45227 MNL-MAT-1 513-272-1111 October 2010 www.honeywell.com © 2010 Honeywell...

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