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Summary of Contents for GE DewPro MMY31
- Page 1 Trace Moisture Transmitter ® DewPro MMY31 Installation and Operation Manual GE Infrastructure Sensing GE General Eastern...
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Page 2: General Notes
GE General Eastern reserves the right to change or modify our product appearance and specifications at any time and without notice. Therefore, information in this document is subject to change without notice and does not represent a commitment on the part of GE General Eastern. -
Page 3: Table Of Contents
DewPro MMY31 Installation and Operation Manual Contents General Notes General System Information 1.1 Unpacking and Inspection 1.2 Introduction 1.3 Theory of Operation Installation Guidelines 2.1 Mounting the Probe Wiring for Configurations with One 3.1 Wiring, General Guidelines 3.2 System Configuration, Various 3.3 Mounting in Normal Environments... -
Page 4: General System Information
DewPro MMY31 Installation and Operation Manual General System Information 1. 1 Unpacking and Inspection Upon receipt of the DewPro MMY 31, examine the shipping carton for broken or Unpacking open packing, distortion, or any other evidence of mishandling. If inspection indicates damage to the unit or any of its components, notify the carrier (within 15 days of delivery) and request an inspection. -
Page 5: Introduction
+/- 2 C dew point. Recalibration should be performed approximately once a year, depending on application and the required accuracy. GE General Eastern has multiple calibration facilities world wide providing trace ability to national and international standards. -
Page 6: Installation Guidelines
DewPro MMY31 Installation and Operation Manual Installation Guidelines 2.1 Mounting the Probe Preferably, mount the probe vertically such that the sensor tip points down. Mount the probe in a G 1/2 thread connection or with a flange. Be certain that the tip of the probe does not touch the inside wall of the pipe. -
Page 7: Wiring For Configurations With One
DewPro MMY31 Installation and Operation Manual Wiring 3.1 Wiring, General Guidelines Caution! Caution! The DewPro system contains electronic components that are susceptible to damage by static electricity. Proper handling procedures must be observed during the removal , installation, or other handling of internal boards. -
Page 8: Mounting In Normal Environments
• EMI/RFI In areas where EMI/RFI interference is likely, a shielded signal cable is to be used for full protection. The DewPro MMY31 meets requirements of IEC 801-1 through 6 (EN 50081-1, 50082-2) when properly shielded cable is used Shielded Two... -
Page 9: 6 General Wiring Instructions
DewPro MMY31 Installation and Operation Manual 3.6 General Wiring Instructions 1. Unscrew the cap on top of the unit. 2. Loosen the gray cable gland located on the side of the unit. 3. Feed the cable through the conduit opening. -
Page 10: Optional Display/User Interface
DewPro MMY31 Installation and Operation Manual Optional Display/User Interface 4.1 Installation If the DewPro is equipped with an optional display / user interface follow the procedure below to access the terminals prior to applying power. Please use Figure 18 below as a reference when removing any parts from the DewPro. -
Page 11: Description Of The Dewpro Mmr 31 Programming Matrix
DewPro MMY31 Installation and Operation Manual 4.2 Description of the DewPro MMY31 Programming Matrix In the DewPro mid-range moisture transmitter with display option, a matrix-style input is used for programming the unit of measure, measuring range, error status of output, and output adjustment. -
Page 12: Special Functions Of The Pushbuttons
DewPro MMY31 Installation and Operation Manual Special Functions of the Push buttons 1. Reset to "Normal" Display: Pressing the 'V' and “H” buttons simultaneously returns the user to VH 00 (normal display). 2. Display Only: Note that eight (6) matrix locations me for display only and may not be changed by the user (refer to Figure 20 or Appendix). - Page 13 DewPro MMY31 Installation and Operation Manual 3. Loop at Fault Location in Matrix Description of Function VH 07 If any fault malfunction occurs, the loop can be set to either "- 10%" (=3.6 mA), to "110%" (=22 mA) or "Hold" (stays at last valid value).
- Page 14 DewPro MMY31 Installation and Operation Manual SPECIAL CALIBRATION 7. Adjusting the pressure constant Location in Matrix Description of Function VH 30 The process pressure constant is entered in bar (absolute), which is used to calculate ppmv. The moisture unit ppmv is the ratio of water vapor pressure to the total process pressure and is, therefore, independent of the process pressure.
- Page 15 DewPro MMY31 Installation and Operation Manual MODE OF OPERATION 10. Input locking Location in Matrix Description of Function VH 89 Any number other than "50" will lock the instrument settings from inadvertent or unauthorized changes. (The instrument is only unlocked at "50".) 11.
- Page 16 DewPro MMY31 Installation and Operation Manual 13. Instrumentation Identification number Location in Matrix Description of Function VH 92 The instrumentation identification number should always read “100”. 14. Identification Field Location in Matrix Description of Function VH 93 This field indicates the software version (ie. version 2.02 or higher).
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Page 17: Troubleshooting
DewPro MMY31 Installation and Operation Manual Troubleshooting 5.1 General Problems 1. The loop current is outside the range of 4-20 mA, as shown on display or current meter. SOLUTION: The process dewpoint is out of range. If the dewpoint is above... -
Page 18: Technical Specifications
DewPro MMY31 Installation and Operation Manual Technical Specifications Sensor element : Gold/aluminum oxide, capacitance principle Measuring range(s) : -90°C to +20°C dew point temperature; 0 to 10 ppm-v, 0 to 100 ppm-v or 0 to 1000 ppm-v (adjustable with integrated display) -
Page 19: Accessories
Single power supply Panel mount display, power supply, no relays Panel mount display, power supply, two alarms Panel mount display, power supply, two alarms. 4 to 20 repeating output Consult GE General Eastern Example Example Optional loop powered display available... -
Page 20: Contact Adresses
DewPro MMY31 Installation and Operation Manual Addresses For More information, please contact one of the following GE General Eastern offices: GE General Eastern Instruments 500 Research Drive Wilmington, MA Tel. +1 978 203 1900 Fax. +1 978 203 1903 Germany GE General Eastern Branch of GE Measurement &... -
Page 21: Appendix
Installation and Operation Manual DewPro MMY31 APPENDIX MMY 31 Select Display Loop 1 at Fault Moisture Unit Loop 1 Raw Moisture Unit Moisture 0= -10%, see table Reading 1=110%, 2=Hold Value below Dewpoint °C Dewpoint °C Loop Range 4 mA 20 mA Constant;...