Inspection Procedures - Becker HPP-5 Instruction Manual

Model HPP-5 Single-Acting Positioner Annual Maintenance Checklist
1. __________ Soap test all diaphragm mating surfaces to check for leaks.
2. __________ Replace rubber goods utilizing Becker Model HPP-4 Single-Acting
Positioner Repair Kit (Part # 30-9501) if necessary.
Refer to Pages 12-17, HPP-SB Assembly Procedures.
3. __________ Confirm Power Gas Supply Pressure is correct.
Refer to original Becker invoice paperwork for proper power gas setting.
4. __________ Observe operation of gages and replace if defective.
5. __________ Check integrity of HPP-4 positioner seats. Varying input signal 1 psig
should send one cylinder output gauge to full power gas.
Refer to Procedure 7 note, pages 9, Adjustment Procedure.
6. __________ Check response of HPP-4 positioner. Varying input signal 1/4 psig
should produce cylinder output gauge differential equal to 40% of
power gas.
Refer to Procedure 6-8, pages 8-9, Adjustment Procedure.
7. __________ Check range and bias of HPP-4 positioner and adjust if necessary.
Refer to Pages 9-11 of adjustment procedure.
8. __________ Inspect and Verify Proper Operation of all HPP-4 Positioner Accesso-
ries.
Refer to technical manual included with each specific instrumentation ac-
cessory for further instruction.
Note: It is not necessary to replace any rubber goods in Becker
instrumentation or instrumentation accessories on a regular basis. However, common
practice suggests that replacement of rubber goods on a 5-year cycle basis provides
adequate preventative maintenance.
HPP-4 HPP-5
Maintenance and Inspection
15 15
HPP-5 Positioner
September 1999 September 1999