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28

Section 5  

Model 763A Gage Pressure Transmitter

!

   WARNING:  Except for replacing O-rings, fasteners, and connector as-

semblies, no 

 repair or component replacement on the Model 763A 

is authorized.  

Unauthorized repairs void any 

 to 

 

reports for design basis event performance.

Table 5.1—Model 763A Replacement Parts

Item

Description

Part No.

Per Unit

1

Screw, Rd. Hd., S.S., 10-32 x 5/16

9A-C0111-0048J

4

2

Washer, Lock, S.S., #10

9A-C0003-0032K

4

3

Bracket

9A-C0763-1016C

1

4*

O-ring (Case)

9A-C0001-1057R

1

5*

O-ring (Cover)

9A-C0001-1056R

1

6*

Washer, Flat, S.S., 1/4

9A-C0003-1029K

8

7*

Screw, Cap, Socket Hd., S.S., 1/2-20 x 1/2

9A-C0220-1009J

8

8

Case Cover (Optional)

9A-C0764-1066C

1

9

Case Cover (Standard, External Adjustment)

9A-C0764-1262B

1

10*

O-ring (External Adjustment)

9A-C0001-1050R

2

11

Plug, External Adjustment Calibration

9A-C0764-1247C

2

12

Connector Assembly, EGS QDC

9A-C0764-1304B

1

13*

O-ring, QDC (Not Shown)

9A-C0001-1218R

1

14

Tool, Barton Style Connector Assembly Installation 

(Not Shown)

9A-0764-1174B

1

16*

Lubricant, O-Ring, Dow Corning High Vacuum 

Grease 

(Not Shown)

9A-C0002-1003U

A/R

17

EGS QDC Thread Lubricant (Not Shown)

9A-C0002-1067U

A/R

* Recommended Spare Part

www.ittcontrols.com

[email protected]

Содержание BARTON 763A

Страница 1: ...formance 4 Application 5 Storage 6 Section 2 Theory of Operation 7 Basic Components 7 Gage Pressure Sensing Element 7 Electronic Transmitter 7 Basic Operation 7 Reverse Polarity Protection 7 Regulator...

Страница 2: ...2 Leakage 12 Manifolding 13 Electrical Connections 13 Load and Line Resistance Calculations 14 EMI RFI Shielding 15 Initial Calibration Adjustments 16 Calibration Check 16 Startup Procedure 18 Shutdow...

Страница 3: ...g element is a C type Bourdon tube that actuates the elec tronic transmitter circuit The pressure elements are available in Haynes Alloy 25 which is compatible with most process media requirements and...

Страница 4: ...per volt above 15 VDC 10 50 mA Load Effect 0 05 of factory calibrated span per 100 Ohm change 4 20 mA 0 1 of factory calibrated span per 100 Ohm change 10 50 mA Power Supply Effect 0 025 of factory ca...

Страница 5: ...cation The Model 763 Gage Pressure Transmitter was subjected to IEEE 323 functional service in a harsh environment LOCA MSLB Subsequent to the sembly using a Bourdon tube strain gage and connecting wi...

Страница 6: ...ctrically to induce stress during acceler ated aging Vibration cycling using 0 2 G sweeps over the 1 100 Hz range 1 0 octave min Storage Storage per ANSI N45 2 2 1978 Level B 70 F 20 C 20 F 11 C in fa...

Страница 7: ...it The bridge output signal is conditioned and converted to a 4 20 mA or 10 50 mA output signal by the transmitter electronics Basic Operation The electronic transmitter is basically a loop current re...

Страница 8: ...8 Section 2 Model 763A Gage Pressure Transmitter Figure 2 1 Operational block diagram www ittcontrols com contact ittcontrols com...

Страница 9: ...with the feedback net work to be proportional to the bridge output Temperature Compensation The 763A is temperature compensated at the factory Only those repairs IMPORTANT Combined zero and or span c...

Страница 10: ...10 Section 2 Model 763A Gage Pressure Transmitter www ittcontrols com contact ittcontrols com...

Страница 11: ...Pre Operating Instructions The following steps must be performed at the time of installation to ensure that the instrument will perform to its original calibration 1 Verify that the transmitter is mo...

Страница 12: ...wnward from the transmitter when used in gas instal lations to prevent liquid entrapment Slope all piping upward from the transmitter when used in liquid applica tions to prevent gas entrapment WARNIN...

Страница 13: ...his section for determining the proper power supply DC output voltage Field wiring connections for the transmitter are presented in Figure 3 2 If the transmitter is equipped with an EGS Quick Disconne...

Страница 14: ...Vdc TVDC 15 Vdc IDC 20 mA RT 1 900 Ohms 0 02 53 15 Example 3 Calculation to determine maximum loop resistance with power supply 30 5 Vdc but 53 Vdc for 10 50 mA systems VDC 40 Vdc TVDC 30 5 Vdc IDC 5...

Страница 15: ...equired voltage at the transmitter Use the actual value when available otherwise use worst case value Use Figure 3 3 as a reference to determine if the maximum calculated value of RT RLine RLoad RExt...

Страница 16: ...over must be removed to adjust calibration See Transmitter Cover Removal page 21 for instructions WARNING Do not tamper with the Bourdon tube inside the enclosure or the delicate wires connected to it...

Страница 17: ...3 1 Calibration Checkpoints Applied Calibration Pressure Checkpoint of Full Scale Output 4 20 mA Transmitter 10 50 mA Transmitter Current 0 08 mA Voltage 0 04 Vdc Current 0 2 mA Voltage 0 04 Vdc 0 4 m...

Страница 18: ...n the plugs until they are snug no applicable torque values IMPORTANT The plugs should be tightened only to prevent loosening due to vibration without interfering with zero and span potentiometer adju...

Страница 19: ...trument may be out of calibration A calibration should consist of at least nine checkpoints from minimum to full scale calibrated pressure and back to minimum For optimum results the test equipment sh...

Страница 20: ...dc 10 mA 2 Vdc 25 8 mA 4 Vdc 20 mA 4 Vdc 50 12 mA 6 Vdc 30 mA 6 Vdc 75 16 mA 8 Vdc 40 mA 8 Vdc 100 20 mA 10 Vdc 50 mA 10 Vdc This value includes the effects of conformance non linearity deadband hyste...

Страница 21: ...from the jackholes and place with the other cap screws Transmitter Cover Reinstallation IMPORTANT Replacement of the transmitter cover O ring is recommended each time the transmitter is disassembled...

Страница 22: ...halves by positioning the male D plug into the female D hole When the two parts are aligned they can be pushed together until the O ring is seated against the sealing surface on the con nector halves...

Страница 23: ...ctor assembly if applicable 5 Carefully unscrew and remove the unmated connector assembly Take care not to damage the wires and prevent damage to the transmitter by using a wrench to hold the conduit...

Страница 24: ...on page 21 3 Disconnect the red and black signal leads from the transmitter circuit board TB 1 7 and TB 2 6 as shown in Figure 4 3 4 Insert the connector tool Part No 9A 0764 1174B into the transmitte...

Страница 25: ...ack signal leads of the connector assembly to the transmitter circuit board TB 1 7 and TB 2 6 6 Install new O rings into the grooves of the transmitter cover Lightly lubricate the O rings with DC High...

Страница 26: ...power source Load Resis tance Resistance too high Replace load resistance or repair as required Transmission Cable Resistance or length of cable in excess of Measure cable loop resistance Electronic...

Страница 27: ...27 Model 763A Gage Pressure Transmitter Section 5 Section 5 Assembly Drawing and Parts List Figure 5 1 763A assembly www ittcontrols com contact ittcontrols com...

Страница 28: ...Cover 9A C0001 1056R 1 6 Washer Flat S S 1 4 9A C0003 1029K 8 7 Screw Cap Socket Hd S S 1 2 20 x 1 2 9A C0220 1009J 8 8 Case Cover Optional 9A C0764 1066C 1 9 Case Cover Standard External Adjustment...

Страница 29: ...ction show the outline dimensions for the 763A Gage Pressure Transmitter These images are based on production drawing 9A C0763 10173 Figure 6 1 763A transmitter front view connector assembly not shown...

Страница 30: ...30 Section 6 Model 763A Gage Pressure Transmitter Figure 6 3 763A transmitter side view www ittcontrols com contact ittcontrols com...

Страница 31: ...ILITY OR FIT NESS FOR A PARTICULAR PURPOSE OR OTHERWISE 2 Components manufactured by any supplier other than Cameron shall bear only the warranty made by the manufacturer of that product and Cameron a...

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