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Table 4.1 Configuration instructions
Screen
Buttons
Screen Description
Button effects
One press saves the displayed value and activates the next configuration-mode screen.
After the configuration process is completed and before the unit’s first use, calibrate the instrument (see
“Zero, Calibration, Bump Test”).
Operation
In operation mode, the following apply:
With successive short presses of the on-off-mode button ( ), the instrument operator can scroll
through the operation-mode loop.
The zero, calibration, and bump test processes can be completed only if these task settings are
enabled for operation-mode access.
The TWA, STEL (if enabled for operation-mode access), and peak readings can be viewed and
cleared. When any summary reading is cleared, its value is reset to zero and its time-related setting is
also reset to zero.
In general, the buttons are used as follows:
• Press to scroll through the operation-mode loop.
• Press to initiate a task or to clear a reading.
• A long press on will reset a latched alarm; it does not disable an enabled latch.
• When and are simultaneously pressed and held for three seconds, the unit will complete a
self-test.
• Except where noted, when no button is pressed for 30 seconds, the home screen is activated.
Table 4.2 outlines the operation-mode loop. Instructions for button use accompany each display screen.
Table 4.2 Operation instructions
Screen
Buttons
Screen description
Button effects
This screen (numeric shown) features the check mark and sensor-type icons, the current gas
reading, and unit of measure.
The check mark indicates the unit is operational and there are no sensor faults.
One short press turns on the backlight if the unit senses it is not in a well-lit environment.
When the unit is in alarm, a long press will reset a latched alarm; the alarm will recur if the alarm-
causing condition is still present.
Activates the next enabled operation-mode screen.
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