Crystal ConfigXP Digital Pressure Gauge Software - Manual (Page 6)

Settings  6
Confi gXP User’s Manual
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PEAK BUTTON OPTIONS
Use the Peak button options to control how peaks and averaging are displayed.
• Enable Peaks: When unchecked this prevents the display of Peak High or Peak Low. This does not aff ect averaging, if available.
• Enable Averaging: When unchecked this prevents the display of average pressures. The edit fi eld next to this check box controls the number of samples to
be used to calculate an average pressure reading. This number can be between 1 and 10. Not available on all models.
•
Enable Rate: When unchecked this prevents the display of pressure rate. The edit fi eld next to this check box controls the number of calculations used to
produce an average rate. This number can be between 3 and 10. Not available on all models.
•
Force second line always on: When checked, the second line of a XP2i-DD cannot be turned off . Not available on all -DD models.
• Enable Diff erential Mode: Only available on -DD models, diff erential mode allows the XP2i-DD gauge (the master) to be connected to a second XP2i or
XP2i-DD gauge (the slave) and display the pressure diff erence between the two gauges. A standard RS232 cable (p/n 2400) and null modem adapter
(p/n 3456) or a NULL modem cable are required to directly connect the gauges. Once enabled, use the
(
peak
)
button on the master gauge until the Peak
High( HI ) and Peak Low( LO ) icons are displayed simultaneously. The XP2i-DD gauge must be running fi rmware version R0111 or later, and the XP2i
gauge must be running fi rmware version R0010 or later for this feature to work. Use XP2iUpdate to upgrade to the latest fi rmware.
• Enable 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 XP2i gauge to approximately eight times per second and replaces the Peak Low
logic with a method of automatically recording the closing pressure of the valve after it opens.
Use Confi gXP to activate PSVtest Mode. When the Peak High icon ( HI ) fl ashes, PSVtest mode is enabled. A special feature of PSVtest is that Peak Low is
automatically 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) XP2i 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 fl ash on the display.
To clear the peaks, press the
(
clear
)
button while the display shows the High ( HI ) or Low ( LO ) icons.
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.