Part Number:
2A33687
Release Date:
8/27/2015
Revision: B
13
Standard Gauges – Calibration Guide Cont.
STEP 3
Perform a pressure test of pumping system to the desired “Pop-off” pressure (or opening of the valve). Hold at
that pressure. The “Pop-off” setting in case of an over pressure incident must be at a minimum of 1000 PSI over
the system operating pressure to prevent chattering and decreased life of the valve.
As the system is holding pressure, calibration can begin by SLOWLY turning the BLACK (B) regulator now
counter- clockwise, at intervals of 5 PSI. A slight amount of fluid can be seen discharged from the outlet port of
the valve. Iron connected to the discharge port of the valve may need to be disconnected to see an immediate
indication.
NOTE
: DUE TO THE SMALL AMOUNT OF DISCHARGE, THE USER WILL LIKELY NOT SEE AN
INDICATION IN THE DATA VAN.
STEP 4
Turn the BLUE regulator (C) counter-clockwise until the gas starts to exhaust. (Tattle-tale opens; reference
Step 4A)
Then, slightly turn the BLUE regulator (C) clockwise until the gas ceases to exhaust. The correct setting should
be verified by manually pushing the Tattle-tale to the closed position. If it remains closed, the setting is correct.
If the tattle-tale opens, then Nitrogen is still venting. This will require an additional clockwise rotation of the
BLUE regulator (C) and closing of the tattle-tale to verify that Nitrogen is not venting.
