(pipe), wall (surface) or panel (flush). media. Use of a dia-phragm seal with the gauge Ashcroft wall or panel mounting kits should be is recommended for process media that (a) are ordered with the gauge. See paragraph 3 corrosive to the process sensing element;...
2.3 Steam service – In order to prevent live 2.0 TEMPERATURE steam from entering the Bourdon tube, a 2.1 Ambient Temperature – To ensure long siphon filled with water should be installed life and accuracy, pressure gauges should between the gauge and the process line. preferably be used at an ambient tempera- Siphons can be supplied with ratings up to ture between –20 and +150F (–30 to +65C).
Dry locations away from very high thermal sources (ovens, boilers etc.) are pre- 4.0 OPERATION ferred. If the mechanical vibration level is extreme, the gauge should be remotely locat- 4.1 Frequency of inspection –...
This policy is prudent in that it encourages ommended that the user maintain in his the user to procure a new gauge, properly tai- parts inventory one complete Ashcroft ® lored by specification, to each application that instrument for every ten (or fraction thereof) arises.
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(TRUE VALUE minus READING) ÷ feature which permits the user to minimize RANGE. Plotting the individual errors this class of error. Other Ashcroft gauge (Figure 1 on page 10) makes it possible to designs (e.g., 1009 Duralife ) require that the ®...
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TYPICAL CALIBRATION CHART INDICATED VALUE (PSI) True Value – Increasing – Increasing – Decreasing – Decreasing – Without RAP With RAP Without RAP With RAP –.4 –.4 +1.0 +1.4 +1.1 +1.2 +1.0 –.4 –1.0 –.8 –.5 ERROR (% OF FULL SCALE) True Value –...
Remove ring, window, gasket and pointer link toward the movement to increase using Ashcroft tool kits 1205T and 1206T. span or away to decrease span. An adjust- ment of 0.004 inch will change the span by 6.3 Positive Pressure Ranges –...
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ASHCROFT SYSTEM ASSEMBLY Fig. 2 BOURDON TUBE SEGMENT HAIRSPRING PINION LINK ROTARY MOVEMENT BACKPLATE SOCKET TYPE 1082 EXTERNAL ZERO ADJUST FEATURE* Fig. 3 RING INSTRUCTIONS FOR USE: LOOSEN RING LOCKING SCREW “A’’ OBTAIN REQUIRED ADJUSTMENT BY ROTATING KNOB “B’’ CLOCKWISE OR COUNTER-CLOCKWISE.
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TYPE 1082 TEST GAUGE CALIBRATION PROCEDURE Fig. 4...
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Remove the dial. b. Firmly tap pointer onto pinion, using brass c. Apply 25 inches of Hg vacuum. back-up tool from Ashcroft kit 1205T if gauge has rear blow-out plug. If gauge has d. Lightly press pointer onto pinion carefully top fill hole no back-up is required.
Ashcroft 7.0 DIAPHRAGM SEALS diaphragm seal assemblies should only be filled by a seal assembler certified by Ashcroft 7.1 General – A diaphragm seal (isolator) is a Inc. Refer to section 3.3 for a cautionary note...
Micro-Bean to help pre- fluid. vent plugging. 8.2 Throttle Screws & Plugs – These acces- 8.7 Ashcroft Needle Valves – Type 7001 thru sories provide dampening for the least cost. 7004 steel needle valves provide varying They have the advantage of fitting completely...
9.0 RESOURCES Training Videos 9.1.1 Test gauge calibration 9.1.2 1009 Duralife ® gauge calibration 9.1.3 Duragauge ® gauge calibration 9.1.4 Diaphragm seal filling Pressure Instrument Testing Equipment 9.2.1 Type 1305D Deadweight Tester 9.2.2 Type 1327D Pressure Gauge Comparator 9.2.3 Type 1327CM “Precision” Gauge Comparator Tools &...
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Ashcroft Inc., 250 East Main Street Stratford, CT 06614-5145 U.S.A. Tel: 203-378-8281 Fax: 203-385-0408 (Domestic) Fax: 203-385-0357 (International) email: [email protected] www.ashcroft.com Visit our web site www.ashcroft.com All sales subject to standard terms and conditions of sale. I&M008-10098-5/02 (250-1353H) 1M AMR 5P1/08...