Time Electronics
User Manual
7191 Pneumatic Pressure Pump
v1.2
7191 Pneumatic Pressure Pump
Page 8 of 10
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
•
Close the valves and tighten plugs when 7191 is being transported
•
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
Difficult to use
coarse adjust
The isolating valve is open
Close isolating valve
Sealing ring in broken or loose
Replace or tighten sealing ring
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.
