Martel Electronics BetaGauge PI PRO - Manual (Page 6)

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batteries are not installed. Connect a 24V power supply to the terminal
block on the rear of the gauge, noting proper polarity.
Do not install batteries when external power will be used.
Push the power button momentarily to turn the unit on. Push it again
to turn it off.
Set-up and configuration:
Push the CONFIG button to access the user-settable functions on the
gauge. Each time the CONFIG button is pressed; the display advances
to the next function. Once a function has been set, press ENTER to
exit the configuration menu, or CONFIG to continue with further
configuration. In order, the configuration menu and operation is as
follows:
1. Engineering Units set. The unit is shipped configured to display
PSI. By pressing the
▲ and ▼ (ZERO and MAX/MIN) keys you
can scroll forward and backwards through the 18 standard
engineering units plus a one custom unit/scale. When the desired
unit is displayed, press ENTER or CONFIG. Pressure will now be
displayed in the chosen engineering units.
See the Specifications section of this manual for a list of available
engineering units. See the Supervisory Mode section for details on
setting up custom units.
2. Set Auto Off. The auto-shut off can be set in 1 minute increments
from 1 to 30 minutes or “off” (continuous operation). The unit is
shipped set for 30 minutes. Use the
▲ and ▼ keys to set the
desired interval. The “off” setting is at the low end of the choices,
below 1 minute.
3. Display battery voltage. Actual voltage and a percent of life
bargraph indicate battery condition
4. Display actual temperature. The BetaGauge PI is temperature
compensated, this displays the temperature measured by the
internal sensor. The value can be set to degrees F or degrees C
using the arrow keys.
5. Set damping. Choices are “on” and “off” set with the
▲ and ▼
keys. Turning damping on will smooth readings from pulsating
pressure sources.
6. Set sample rate: This determines how often pressure is sampled
and the display is updated. Choices are 0.5, 1, 3, and 10
samples/second. Note that 10/sec provides the fastest response
time.
7. Set TARE. This allows you to set a constant offset value, which is
then subtracted from the measured pressure. For example if a
TARE is set at 30 PSI, and the measured pressure is 37 PSI, the
displayed value will be 7 PSI.
A pressure of 27 PSI would be displayed as –3 PSI.