RKI Instruments GasWatch 2 Manual - Manual (Page 14)

9 • Start Up GasWatch 2 Operator’s Manual
Start Up
This section explains how to start up the GasWatch 2 and to get it ready for
operation.
Start-up Procedure
1. Press and hold the POWER/MODE button for one second to turn on the
GasWatch 2. The the buzzer sounds briefly, the vibrator vibrates briefly,
all elements of display are activated, and the alarm lights and LCD
backlight turn on for a few seconds.
2. The GasWatch 2 then displays the target gas and time before
displaying the battery voltage. The buzzer sounds again after the
battery voltage is displayed.
CAUTION: If the unit is in low battery warning, change the battery
immediately. If the unit is in dead battery alarm, change the
battery before attempting to use the unit.
3. The gas sensor inside the GasWatch 2 begins operating and the
concentration of the target gas is displayed on the LCD. The GasWatch
2 is now in Measuring Mode. The target gas is displayed in the
appropriate units (see specifications) and the current time is displayed
at the bottom of the LCD.
NOTE: When using the GasWatch 2 for the first time, check the current
time and verify that it is correct for your time zone. If it is not, set
the time as described in “Setting the Time”.
Performing a Fresh Air Adjustment
Before using the GasWatch 2, it is a recommended to set the fresh air
reading for the target gas to ensure accurate gas readings in the
monitoring environment.
1. Find a fresh air environment. This is an environment free of toxic or
combustible gases and of normal oxygen content (20.9%).
2. With the unit on and in Measuring Mode, press and hold the AIR button
for about three seconds to allow the GasWatch 2 to set the fresh air
reading.
While you are pressing the AIR button, the LCD displays “hold”, a
prompt for you to keep pressing the AIR button.