12
13
ZERO
PRESS
ZEROING
21.0
02 CAL
4.6.6
BATTERY FAILURE
When the battery has insufficient charge to operate the
instrument, “BATTERY FAIL” is displayed. The visual
alarm will be activated and the instrument will emit a
short beep once every second for approximately 30
seconds after which the instrument will turn itself off.
Recharge or replace the battery (See Section 8.2).
4.6.7
FAULT INDICATION
The ATX612 will emit a short beep once a second if a
newly installed sensor does not agree with the previous
sensor type for that position. The corresponding display
position will be blank. This fault indication also occurs
when a sensor becomes disconnected or a combustible
sensor fault is detected during normal operation. Installed
sensor types are accepted and displayed only after a
successful calibration has been completed.
The sampling pump system is equipped with a low flow
detection alarm. A low flow alarm condition will occur if
the dust filter/water stop becomes clogged or the sample
line becomes blocked in any way. The instrument will
sound a continuous tone, the red alarm light bar will flash
and the display will read PUMP FAULT. If this should
occur, replace the dust filter/water stop immediately (See
Section 9). The unit will not operate and a low flow alarm
condition will remain if the dust filter/water stop is
removed from the instrument. The PUMP FAULT alarm
will be reset once the obstruction has been cleared from
the sample line.
5.
C
ALIBRATING THE
ATX612
BATTERY
FAIL
PUMP
FAULT
If an instrument fails to operate properly following any
functional “bump” test, a full instrument calibration
should be performed prior to use.
Calibration is most accurate when the instrument has been
in a stable temperature environment for at least one hour
prior to calibrating.
NOTE: Instrument zero and oxygen span calibration
should be performed in clean air containing
20.95% (21%) oxygen. If you are measuring a
known combustible gas, use a known
concentration of that gas for calibration. For
general combustible gas measurement, Industrial
Scientific Corporation recommends calibrating to
pentane in the 15-50% LEL range. The measured
LEL concentration of gases other than the
calibration gas may not correspond on a one-to-
one basis with the monitor reading. Always use
teflon or teflon-lined tubing when calibrating.
The ATX612 utilizes a one-button calibration system.
When using multi-gas cylinders, a full instrument
calibration can be performed in a single step. Multi-gas
cylinders are available for the most common instrument
configurations.
To calibrate the ATX612:
• From the normal READING mode, press the MODE
switch twice to access the ZERO operating mode.
• Press the (E) key to start the instrument zeroing process.
The instrument display will indicate ZEROING.
• When zeroing is complete the instrument display will
indicate O2 CAL and will show the current full span
value of the oxygen sensor. The oxygen sensor will be
calibrated to 21.0 in approximately 30 seconds.
Instrument zeroing and oxygen calibration may be aborted
at any time by pressing the MODE switch.
NOTE: Zeroing the instrument in clean air is preferred,
provided that there is no trace of toxic or
combustible gas. If the air purity is uncertain, use
a cylinder of zero grade air to zero the instrument
and span the oxygen sensor.
• At the completion of the oxygen sensor calibration, the
instrument will emit a short beep and the display will
indicate GO CAL. The message PRESS (E) to CAL will
scroll across the bottom of the display. Press (E) to
continue calibrating the remaining sensors. If you ignore
this message the instrument will return to the normal
operating mode in approximately eight seconds.
The ATX612 is a potential life saving device. Recognizing
this fact, Industrial Scientific Corporation recommends
that a functional (“bump”) test be performed on every
instrument prior to each use. A functional test is defined as
a brief exposure of the monitor to a known concentration
of gas(es) for the purpose of verifying sensor and alarm
operation. It is not intended to be a measure of the
accuracy of the instrument.
Industrial Scientific also recommends that a full
instrument calibration be performed using a certified
concentration(s) of calibration gas(es) monthly to ensure
maximum accuracy.
Содержание ATX612
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