Time Electronics
User Manual
7194A Pneumatic Calibration Pump
v1.5
7194A Pneumatic Calibration Pump
Page 9 of 11
4
Operating Precautions & Troubleshooting
4.1
Operating Precautions
•
Do not exceed the safety pressure limit
•
Compressed air may cause problems in explosive or hazardous environments
•
Do not shift the selector to vacuum mode whilst under pressure
•
Do not over tighten connectors
•
Store the pump in a dry and clean environment
4.2
Troubleshooting
Problem
Causes
Solution
Cannot pressurise
device under test
Hard to pump pressure lever
Check isolating valve is open
Check airline for blockages
Pressure lever pumps but pressure
is not increasing
Check release valve is closed
Check pressure/vacuum selector is pulled out
(for pressure).
Check for leaks on device under test
Check for leaks on output connection
Check sealing ring on clean-out port
Difficult to use fine
adjust
Output pressure is unstable when
using fine adjust
Check the isolating valve is closed
Slow leak, output pressure
dropping.
Check reference gauge and device under test is
tightly screwed on and connection seal washer.
Check release valve is closed
Check pressure/vacuum selector is engaged
correctly.
