Crystal DataLoggerXP Digital Pressure Gauge Software User Manual
Page 8
Functions
6
XP2i Operation Manual
automatic shut-off
The XP2i has a shutoff timer and will turn off automatically after 20 minutes of non-operation. Pressing any button or sending any command via the RS-232
connection resets the shutoff timer for another 20 minutes of operation. The XP2i will briefly display
Auto Off 20
when turned on.
To disable the shutoff feature, turn on the XP2i by pressing the
(
on/off
)
and
(
zero
)
buttons simultaneously. The XP2i will briefly display the words
No Auto
Off
to indicate that it will not turn off. The shutoff feature can be enabled again when turning the XP2i on, by pressing the same
(
on/off
)
and
(
zero
)
buttons.
These settings are retained when the product is powered down.
Note:
This key combination will not toggle the auto-shutoff feature if ConfigXP is set to require a password before changing settings.
Backlight
Pressing the
(
backlight
)
button instantly lights the display at maximum brightness. Hold down the button for 1 second to keep it on. The display will flash
briefly, indicating that it will stay on for 1 minute. If you press the
(
backlight
)
button again, the backlight will go into a lower brightness setting to extend bat-
tery life, and remain on for 2 minutes after the last key is pressed. Press the
(
backlight
)
button once more and the light will go out.
If you start the XP2i in the No Auto Off mode, you may select the brightness level in the same way. The light will never time out and turn off. Turn off the XP2i,
or press the
(
backlight
)
button repeatedly, to turn off the backlight.
Measuring Vacuum
All versions of the XP2i can be used to measure moderate vacuum, though only ranges of 300 psi (and 20 bar or 2000 kPa) and lower are actually tested and
certified for vacuum operation.
When measuring pressure less than ambient barometric conditions, a minus (-) sign will appear.
Absolute gauges
(models with a “B” in front of “XP2i” in the part number) will NOT indicate a negative sign when vacuum is applied, unless the
(
zero
)
button
has been pressed while a pressure greater than full vacuum is applied to the gauge. If your absolute gauge does indicate a negative pressure, you can clear
the zero value (“unzero”) by pressing the
(
zero
)
button until the display changes from (
) to (
).
!
Caution: XP2is are not recommended for continuous use below -14.5 psig.
For continuous use below -14.5 psig with high accuracy, choose our