Alcotest 7410 GLC User’s Manual
4
Operation of The Alcotest 7410 GLC
Before using the GLC, the operator should
be aware of the calibration and battery
charge status.
A. Calibration Status
The calibration of the GLC is checked every
two weeks to ensure proper results are
obtained. This duty can only be performed
by a designated
calibrator
who has taken
the required training. Upon completing the
calibration process, the calibrator affixes a
sticker showing the date of the last
calibration. If the current date is more than
two weeks from the last calibration date, do
not use the GLC. Return the device to a
calibrator.
B. Battery Charge
The power supply for the GLC is either a
rechargeable nickel cadmium (NiCd) battery
pack or a non-rechargeable alkaline battery
pack containing three disposable C-size 1.5
volt batteries. Regardless of what power
supply is used, the device has a
“Lo Bat”
indicator which will appear in the lower left
hand corner of the liquid crystal display
(LCD). The device must be turned on to see
this indicator. If you are using NiCd
batteries, a “Lo Bat” indicator means battery
power is low and operation can be
continued for only a few minutes. Return
the device to the charging unit. If you are
using disposable alkaline batteries, “Lo Bat”
will come on as part of the normal
operational cycle. It does not indicate that
the batteries must be replaced. When there
is insufficient power to conduct a test, the
instrument will automatically shut off.
NOTE: The users must be aware of which
device they have. Only GLCs which have
rechargeable batteries should have the
charging unit at your detachment. The type
of batteries your device has should be
confirmed with the calibrator. This is
important not only for operational reasons,
but for safety reasons as well. Do not
attempt to charge a GLC that has
non-rechargeable batteries.
C. Operational Procedure
Once you have determined the calibration
and battery charge status, you are ready to
proceed into the normal operational cycle.
This cycle consists of the following:
1. Press the button (shaded grey) on the
right side of the device
once.
2. The
yellow
“On” light illuminates and a
self test is carried out.
3. A brief indication of the display option
for the device is shown, followed by the
model designation (GLC).
4. This is followed by the display
“ - - - wait ”
5. After 10 to 30 seconds the
“wait”
indication goes out and the green