Energizer ATX612 - Manual (Page 8)

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4.6.2 HIGH ALARM
When a monitored gas concentration reaches the high
alarm level setpoint, the instrument emits a continuous dual
tone alarm. As with the low alarm condition, the red alarm
light bar and backlight will flash simultaneously with the
displayed gas value. If the hygiene/datalogging option is
installed, the STEL alarm will mimic the high alarm
indicator and the STEL display value in alarm will flash.
NOTE: The ATX612 uses the continuous high alarm tone
for both low (depletion) and high (enrichment)
oxygen alarm conditions.
4.6.3 OVER-RANGE INDICATION
An over-range condition occurs when a sensor reading
exceeds the upper limit of the instrument display range.
Over-Range is indicated by +OR in the appropriate sensor
display location. With the exception of combustible gas
over-range, all over-range conditions will clear
automatically when the gas concentrations have decreased
to levels within the display range of the instrument.
4.6.4 COMBUSTIBLE GAS OVER-RANGE
When the ATX612 detects combustible gases in excess of
100% of LEL (5% CH4 by volume), a high alarm
condition is latched (locked on) and +OR is displayed in
place of the combustible gas reading. Power is removed
from the combustible gas sensor to prevent damage due to
the high level of combustible gas.
To clear the combustible gas over-range alarm:
• Exit the hazardous area immediately.
• Press (E) key in clean air.
NOTE: When the instrument is turned on, the combustible
gas level must be less than 100% of LEL (5%
CH
4
) to clear the combustible gas over-range
condition.
4.6.5 LOW BATTERY WARNING
With 15-60 minutes of run time remaining, the ATX612
will emit a short beep once every 60 seconds and the
battery status indicator will be replaced with a flashing
“B” to indicate the low battery condition.
NOTE: The length of warning time will increase when
there is no combustible gas sensor installed in the
instrument.
4.5.6 PEAK CLEAR
This mode will clear all stored peak readings from the
instrument. Press enter (E) to clear the peak readings. The
display will return to the PEAK mode and indicate that the
peak readings have been reset.
If the hygiene/datalogging option is installed, the following
operating modes may also be accessed. See Section 7,
Hygiene/Datalogging Functions, for further instructions.
4.5.7 DATE
This screen allows the user to see the current date
(month/day).
4.5.8 CAL DATE
This mode allows the user to see the date the instrument
was last calibrated.
4.5.9 LOG TIME
This mode allows the user to view the current real time
(RT) and the length of time that data has been recorded in
the current session (LT).
4.5.10 TWA (Time-Weighted Average)*
This mode displays the current time-weighted average
exposure values of the toxic sensors.
4.5.11 STEL (Short Term Exposure Limit)*
This mode displays the short term average exposure values
of the toxic sensors installed in the instrument.
4.5.12 HYGIENE RESET
This mode allows the user to reset the hygiene session and
the STEL and TWA exposure values.
4.6 A LARM I NDICATORS
4.6.1 LOW ALARM
When a monitored gas concentration reaches the low level
alarm setpoint, the instrument emits a short beep
approximately every 1.2 seconds. The red alarm light bar
and backlight will flash simultaneously along with the
displayed gas value. If the hygiene/datalogging option is
installed, the TWA alarm will mimic the low alarm
indicator and the TWA display value in alarm will flash.
CALDATE
5/13
R T 0 6 : 4 5
L T 0 1 : 1 5
0 0
T W A
0 0
S T E L
+ O R 0
2 1 . 0 0
H Y G I E N E
P R E S S
DATE
5/21
O 0
21.0 +OR
O 0
2 1 . 0 0 B
* TWA and STEL
readings do not
apply to oxygen
and combustible
gas exposure.
PK CLR
PRESS