0
Alarms
Viewing Alarm Set Points
To display alarm set-points, press the button times from the normal operating mode (Fig. 9). The low alarm
will be displayed. Press the button again to display the high alarm, TWA alarm and STEL alarm, respectively.
Low Alarm
A low alarm is indicated by a slow alarm sequence of buzzer, red LED, “LOW ALARM” display and vibrator
actuated every 2. seconds (Fig. 0).
High Alarm
A high alarm is indicated by a fast alarm sequence of buzzer, red LED, “HIGH ALARM” display and vibrator
actuated every .2 seconds (Fig. ).
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. 2). 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. ).
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. ).
Over Range Alarm
An over range alarm is indicated by a flashing display showing the highest value
in the range of the sensor: 99 ppm for CO (Fig. ) and 200 ppm for H
2
S. The
alarm indicators are the same as those for the normal alarm.
Low Battery Alarm
If battery capacity reaches a point where it is no longer sufficient to maintain
operation of the unit, the LCD will display “bAt” (Fig. 6). Press button to
acknowledge and silence the alarm. Do not use until battery is replaced by a M
Service Center.
WARNING
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 – ˚F (–20 ˚C). Using the instrument below this
temperature may adversely affect product performance and
result in sickness or death.
Fig. 9
Fig. 0
Fig.
Fig. 2
Fig.
Fig.
Fig.
Fig. 6
Alarm Mode Table
Alarm Mode
Display
Alarm Sequence
Low
Gas Concentration and
“LOW ALARM”
Repeating Alarm Cycle:
Three 2. sec. alarm sequences (vibrate, double
beep/double flash) followed by five 2. sec. alarm
sequences (double beep/double flash). Repeats cycle.
High
Gas Concentration and
“HIGH ALARM”
Repeating Alarm Cycle:
Three .2 sec. alarm sequences (vibrate, double
beep/double flash) followed by five .2 sec. alarm
sequences (double beep/double flash). Repeats cycle.
TWA
Gas Concentration alternates
with “tA”
Repeating Alarm Cycle:
Three .2 sec. alarm sequences (vibrate, double
beep/double flash) followed by five .2 sec. alarm
sequences (double beep/double flash). Repeats cycle.
STEL
Gas Concentration alternates
with “StL”
Repeating Alarm Cycle:
Three .2 sec. alarm sequences (vibrate, double
beep/double flash) followed by five .2 sec. alarm
sequences (double beep/double flash). Repeats cycle.
Over Range
“HIGH ALARM” and flashing of
highest value in the range of sensor
(99 ppm CO, 200 ppm H
2
S)
Repeating Alarm Cycle:
Three .2 sec. alarm sequences (vibrate, double
beep/double flash) followed by five .2 sec. alarm
sequences (double beep/double flash). Repeats cycle.
Error
Err
Double beep/double flash every 0 seconds
Fail
FAil
No audible, visual or vibrating alarm
Low Battery
bAt
Double beep/double flash every 0 seconds
Calibration Verification Test and Calibration
The following steps must be performed when conducting a calibration or calibration verification test
(
Bump test
) to ensure proper performance of the monitor. Failure to do so may adversely affect product
performance and
result in sickness or death.
– Calibrate prior to initial use.
– When performing a calibration or calibration verification test (Bump test) only use certified calibration
gas at the required concentration level. Do not calibrate with expired calibration gas.
– A calibration verification test (Bump test) should be performed before each use.
– If the instrument cannot be calibrated, do not use until the reason can be determined and corrected.
– Do not cover or obstruct display, audible alarm opening or visual alarm cover.
– Ensure sensor inlet is unobstructed and is free of debris.
– Ensure calibration hood is removed prior to use.
WARNING
