Martel Electronics BetaGauge PIR PRO - Manual (Page 9)

gauge, the displayed pressure will not reflect the true pressure
applied.
6. Changing the Batteries
WARNING
Explosion hazard
Batteries must only be changed in an area known
to be non-hazardous.
BetaGauge PI
Grasp the face ring on the BetaGauge PIR, turn it approximately ¼
turn counterclockwise and remove. Note: For ATEX certified
versions remove the two screws on the rear of the case to
release the front plate. The face of the gauge can now be lifted
to expose the battery holder. Take off the battery hold clip and
remove the batteries. Install three AA alkaline batteries noting
proper polarity. Note: Use ONLY AA alkaline batteries and be
sure to reinstall the battery holder retaining clip. Reassemble the
case making certain that the face is properly oriented.
If you purchased the optional 24 Volt powered version, the
terminals for power input are located on the rear of the gauge. To
apply power simply connect 24 volts to the rear terminal block
taking care to observe proper polarity.
BetaGauge PIR PRO
Loosen the captive screw on the battery door, then remove the
battery door to expose the 3 AA batteries. Replace the batteries
as required and then reinstall the battery door and teighten the
captive screw.
WARNING
Gauges ordered with the external power option will not come with
batteries installed. Batteries MUST NOT be installed when
operating on external power. External power option gauges are not
approved for hazardous location use.
Battery life
Battery life is about 1500 hours (60 days) of continuous use with
the backlight off. With intermittent use, batteries could last a year
or more. There is a low battery icon in the upper left of the display.
It will appear when battery level is low. Replace batteries per
recommendations found in the specifications section of this
manual.
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