www.astsensors.com
AG100 Operating Instructions Rev 1.1
Warranty
Workmanship - AST, Inc. pressure transmitters have a limited one-year warranty to the original purchaser. AST, Inc. will replace or repair,
free of charge, any defective transmitter. This warranty does not apply to any units that have been modified; misused, neglected or installed
where the application exceeds published ratings. AST’s sensors are made with pride in New Jersey, USA. If in the area please feel free to
stop by for a visit!
Installation/Applications
- The purchaser is responsible for media compatibility, functional adequacy, and correct installation of the transmitter.
TM
ON OFF
Press and release this button to turn the AccuGauge ON. Press and
hold this button to turn the AccuGauge OFF. When the AccuGauge
is ON press and release this button to turn on the backlight. The
AccuGauge will automatically turn OFF after one hour to conserve
battery power.
BACKLIGHT
The backlight of the AccuGauge will illuminate the LCD display for
10 seconds anytime one of the four buttons is pressed. To turn on
the backlight without changing the display, press and release the
ON/OFF button.
UNITS
Press the UNITS button to cycle through the units of measurement
the AccuGauge can display. The AccuGauge can measure pressure
in PSI, BAR, Kg/cm2, Inches Hg, Inches H
2
O and ATM. The unit
of measurement can be changed at any time and will not affect the
operation of the AccuGauge.
RELATIVE PRESSURE
Press and release the ZERO button to place the AccuGauge in
relative pressure mode. The REL symbol will be displayed at the
top of the LCD to indicate the gauge is operating in relative pres-
sure mode. The display will rezero at the applied pressure that
was acting on the Gauge at the moment the button is pressed and
display pressure re/- relative to that pressure. Press this
button again to return to GAUGE mode of operation, which displays
pressure relative to the local pressure.
ZERO
Over the course of time it may become necessary to reset the Accu-
Gauge to zero. Press and hold the ZERO button until the REL sym-
bol appears and disappears and the display reads zero pressure in
the selected units of measurement. Release the ZERO button and
the display will read zero pressure in the current units selected.
MIN MAX
The MIN MAX button allows the user to read the minimum and
maximum pressure the AccuGauge has detected during the time
that the gauge has been on. These readings are not saved and
reset every time the gauge is powered off. Press the MIN MAX
button once and the MIN symbol will be displayed along with the
minimum pressure, press the MIN MAX button again and the MAX
symbol will be displayed along with the maximum pressure. Press
the MIN MAX button again and the MAX symbol will disappear and
the gauge will display the current pressure. Press and hold the MIN
MAX button to reset the minimum and maximum pressure readings.
LOW BATTERY
The AccuGauge has a battery condition indicator in the upper left
corner of the LCD display. The indicator is composed of a battery
symbol and four vertical bars. As the battery discharges the verti-
cal bars will disappear from right to left. When all four bars have
disappeared the battery is nearly discharged. As a final warning
the symbol LOW BAT will be displayed and indicates the battery is
nearing complete discharge and should be changed immediately.
For best results replace the battery immediately. Use only Alkaline
or Lithium 9V batteries.
BATTERY REPLACEMENT
(NOTE: DO NOT open the AccuGauge unless it is necessary to
change the Battery.) To replace the AccuGauge’s Battery, use
a Phillips Head screwdriver to remove the four screws from the
back plate of the gauge. Unplug the battery cable from the battery
terminals. Remove the battery from the battery holder. Put a new
battery into the holder, ensuring that it is firmly in place. Plug the
battery cable into the terminals of the battery. Make sure that the
polarity is correct. Replace the cover firmly in place. Replace the
four screws.
