8
CAUTION: Always start any Sensit® HXG-2d in a gas free
environment to ensure a proper zero.
1. Push and hold the power button (A) until the display and backlight
illuminates.
2. If the display fails to illuminate or the BAT icon is shown on the
display, replace the batteries.
3. During successful start-up the instrument will display:
a. Display all segments
b. Turn on and off the backlight
c. Display “S2d” as the model number
d. Display software version
e. Display “50.0%” or “10.0%” indicating the LEL Calibration point
for the instrument
f. Display “dIS” indicating display resolution of PPM / %LEL
or both.
g. Display “AL” followed by the alarm set point.
h. Activate the alarm sound and red LED for 3 beeps
i. Continue to flash all segments until proper warm-up is
attained (no more than five minutes)
j. Flash “Zro” indicating fresh air zeroing
k. Working display is shown
NOTE: A failure to properly zero due to the presence of gas is indicated
by “bAd” + cal icon illuminated on the display. Pressing the ZERO (C)
button for 6 seconds and releasing will restart the zeroing process.
NOTE: If a sensor is completely inoperable or improperly zeroed at
start up, the display will show “bAd”.
BATTERY INSTALLATION/REPLACEMENT
9
(Continued on page 10)
OPERATION AND USE
WARNING: Always change batteries in an environment
free of combustible gases.
WARNING: Do not mix batteries of different type or age.
Battery replacement is necessary when the BAT icon is illumi-
nated and the green LED is flashing. This warning indicates there
is approximately 15 minutes or less operational time before the
instrument turns off automatically due to insufficient battery power.
Remove the battery sleeve cover by removing the battery sleeve
screw with a T-10 screwdriver. Depress the locking tab on the front
of the handle with a coin or flat object and pull the battery sleeve
handle away from the top or display area of the instrument.
Place 3 approved batteries into the battery holder. Observe the
polarity markings on the inside of the battery holder for proper
battery installation. Improper installation will cause the instrument
not to operate. Replace the battery sleeve and allow the locking
tab to snap into position. Replace the battery sleeve retaining screw.
Check to be sure the handle is secure to the instrument body by
firmly pulling the handle away. The handle will remain in place if a
proper connection is made.
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