Crystal XP2i 2nd Generation User Manual
Page 7
Functions
5
XP2i Operation Manual
Peak detection and average
On the XP2i
, pressing the Peak button causes the display to cycle through the following:
HI
. . . . . . . . . . . . . . . . Maximum recorded pressure
LO
. . . . . . . . . . . . . . . . Minimum recorded pressure
HI
LO
. . . . . . . . . . . . . . . . Average pressure
*
. . . . . . . . . . . . . . . . Live pressure display
*
From the factory this Average Pressure is disabled. Use ConfigXP to enable.
On the -DD, dual-line XP2i
, pressing the Peak button causes the display to cycle through the following:
HI
. . . . . . . . . . . . . . . . Maximum recorded pressure
LO
. . . . . . . . . . . . . . . . Minimum recorded pressure
AVG
. . . . . . . . . . . . . . . . Average pressure
TARE
. . . . . . . . . . . . . . . . Tare
. . . . . . . . . . . . . . . . Rate of change
. . . . . . . . . . . . . . . . Off
Peak high and low values are not saved when the gauge shuts off; they will reset to the current reading when the XP2i is turned on or reset.
In some cases the ability to display a peak value may not be needed, or may even be dangerous. ConfigXP allows you to dis-
able this button.
XP2is can average 1 to 10 readings, recalculated every time pressure is measured (3 times per second). Enable and set the number of readings to be averaged
with ConfigXP.
differential Mode
(-dd, dual-Line display XP2i only)
Differential 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 difference
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. You must use ConfigXP to enable this feature, and once enabled, use the PEAK button on the master gauge until the
HI
and
LO
icons are displayed
simultaneously. An XP2i-DD gauge must be running firmware version R0114 or later, and an XP2i gauge must be running firmware version R0014 or later for
this feature to work. Use XP2iUpdate (available on the Crystal Engineering web site) to upgrade to the latest firmware.
The differential mode is disabled by default, but can be enabled and configured with ConfigXP.
resetting (clearing) recorded Peak Values
Peak values can only be cleared when displaying either a high or low recorded pressure. Press the
(
clear
)
button for at least ½ second. Dashed lines will then
briefly appear across the display indicating that both peak values have been cleared. Both peak high and low values will then display the current applied pres-
sure. Pressing the
(
clear
)
button while either peak hi or peak lo icon is displayed will not affect the zero value. If you need to rezero the gauge, you must turn
off both peak icons by pressing the
(
peak
)
button.