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Display Readings
Normal Operating Mode
The LCD will display 0 ppm for gas levels below ppm. Gas levels of ppm and higher will be displayed in
increments of ppm.
Performing Self-test
Each time the unit is turned on, it performs a self-test, which activates the audible, vibratory and visual
alarms. If the self-test fails, or all the alarms do not activate, do not use. Failure to do so may adversely
affect product performance and result in sickness or death.
A self-test can be performed at any time by pressing the On/Off/Menu button once from the normal operating
mode. This will test the battery, electronic circuitry and alarm functions to ensure they are working properly.
The self-test does not test the performance of the sensor. This must be done through a calibration or
calibration verification test. See Calibration Verification and Calibration section of these User Instructions.
The self-test will be indicated by the "test" icon being displayed on the LCD for about seconds (Fig. ). The
buzzer, LED and vibrator will activate and then "CAL" will be displayed for seconds (Fig. 4). If the button
is pressed within seconds of "CAL" being displayed, the unit will enter calibration mode (see Calibration
Verification Test and Calibration section). After successful completion of a self-test, the "check" icon (Fig. )
will appear on the display for 4 hours, and the unit will be in normal operating mode.
If a self-test fails, the LCD will display "Err" (Fig. 6). Press button to clear. Do not use the instrument until
the reason for the "Err" message has been determined and corrected.
Fig.
Viewing Peak Levels
From normal mode, press the button twice and the peak reading will be displayed.
To clear the peak reading, wait seconds; "Clr" will be displayed (Fig.7). Press
the button once to clear and the value will be set to zero so long as the unit is in a
non-contaminated environment. The instrument will go back to normal operating
mode after seconds.
Calibration Reminder Function
The unit has a calibration reminder function that can be enabled and disabled
by the user (factory default is enabled). When enabled, the "TEST" icon will flash
when the time since last calibration exceeds 0 days (Fig. 8).
In the event a user has a fixed calibration schedule less than every 0 days, the
calibration reminder function may be disabled. To disable this function: press the
Fig.
WARNING
Fig. 4
Fig.
8
button times, the "Off/On" status will be displayed, wait seconds until the "TEST" icon begins to flash. To
re-enable this function: press the button times, the off/on status will be displayed, wait seconds until the
"TEST" icon begins to flash.
Press the button to toggle between off/on. After seconds it will return to normal mode.
Alarms
Immediately exit any environment that causes an alarm condition on the monitor. Failure to do so may
result in sickness or death.
Do not cover or obstruct display, audible alarm opening or visual alarm cover. Doing so may adversely
affect product performance and result in sickness or death.
Vibrator and LCD may not function effectively below –4 ºF (–0 ºC). Using the instrument below this
temperature may adversely affect product performance and result in sickness or death.
Viewing Alarm Set Points
To display alarm set points, press the button 4 times from the normal operating mode. The alarm will be
displayed. Press the button again to display the TWA alarm and STEL alarm, respectively.
Setting Alarm Levels
The units factory alarm level default set point is ppm. The alarm level can be changed to one of four
preset values, depending on user needs and applications. The four user selectable alarm settings are: ppm,
ppm, 0ppm, 00ppm.
To change the alarm value, press the button 4 times from the normal operating mode. Wait seconds until
the display flashes, then press the button repeatedly until the desired alarm point is shown. Wait seconds
until the display returns to the normal mode. The new alarm point is now set.
Alarm
An alarm condition is indicated by a slow alarm sequence of buzzer, red LED,
"ALARM" display and vibrator actuated every . seconds (Fig. 9).
TWA and STEL Alarm
When a TWA or STEL alarm point is reached, the alarm is actuated. The "tA" is
displayed in the digital display area alternating every second with the gas level
when the TWA alarm is actuated. The "StL" is displayed in the digital display area
alternating every second with the gas level when the STEL alarm is actuated.
To clear TWA, from the normal operating mode, press the button 6 times (Fig.
0). The display will toggle between "tA" and the TWA alarm level setting. Wait
seconds until the display shows "Clr," then press the button once (Fig. ).
Fig. 6
To clear STEL, from the normal operating mode, press the button 7 times (Fig.
). The display will toggle between "StL" and the STEL alarm level setting. Wait
seconds until the display shows "Clr," then press the button once (Fig. ).
Fig. 7
Fig. 0
Fig. 8
WARNING
Fig.
Fig.
9
Fig. 9
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