Martel Electronics BetaGauge PI PRO - Manual (Page 9)

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 PI 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.
RS-232 Interface
An RS-232 interface is standard on the BetaGauge PI. Serial
communication can be used for configuration, calibration, and to
transfer measurement data from the gauge. For detailed specifications
on the interface and software communication, see pages 14 and 15 in
this manual.
WARNING
The RS-232 interface must not be used in hazardous areas.
7. Cleaning
To clean the BetaGauge PI use a cloth with a mild cleaning solution.
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