User Manual

Functions  7
XP2i Operation Manual
PSVtest Mode
PSVtest mode is designed for PSV and PRV (“Pressure Safety Valve” and “Pressure Relief Valve”, respectively) as well as for Rupture Disc (also known as “Burst
Disc”) testing. It increases the measurement rate of the WT Series gauge to approximately eight times per second, to capture the peak pressure when the
valve opened, and adds a method of automatically capturing the closing reseat pressure.
Use Con gXP to activate PSVtest Mode. When the Peak High icon (
HI
)  ashes, PSVtest mode is enabled. A special feature of PSVtest is that Peak Low is au-
tomatically reset to the Peak High value whenever a new Peak High value is detected. Once pressure stops increasing, as when a PSV opens (and the pressure
drops below the maximum pressure) WT Series detects the new minimum pressure values (the Peak Low), capturing the closing pressure of a PSV.
Press the
(peak) button once to view the captured reseat pressure. The Peak Low icon (
LO
) will  ash on the display.
To clear the peaks, press the
(clear) button while the display shows the Peak High icon (
HI
) or Peak Low icon (
LO
).
Note: Application note AN-006
– Pressure Safety Valve Testing detailing the operation of the PSVtest mode is available on xp2i.com, and includes examples on
how to use the gauge in relief valve and burst disk testing.
Reset
If for some rea son the WT Series needs to be re set, re move any battery for at least one minute, then re in stall the battery. If the reset is suc cess ful, the WT Series
will start operating without press ing the
(on/o ) button. Reset will clear the zero, peak values will be reset to the current reading, and the WT Series will be
set to the default engineering units.
Communications/Programming
The WT Series responds to a query-based command language which allows remote control of the gauge. Please refer to the XP2i Programming Instructions
for documentation of this feature.