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ENVIRONMENTAL SENSOR TECHNOLOGY CO. INC.
6. Instrument Setting:
Select the fifth option “5. Setting” in the Main Menu and there are six options in the sub-menu
of Setting: “1.BLT:”, “2. AOT:”, “3. AOV:”, “4. MAD:”, “5. LRV:” and “6. Reset:”; the first
option is backlight time, the second option auto power off time, the third option the voltage of
auto power off, the fourth option the communication address of the module, the fifth option the
reference voltage of LCD (LCD grey scale) and the sixth option resetting (restoring to the
default values). Press the Up/Down to scroll through the list of the options and press the Back
to return to the Main Menu and pressing the Confirm again could enter the parameter altering
status. Press the Shift to select the value to be altered and press the Plus and Minus to make the
alteration and then press the Confirm to confirm the alteration or the clearing and return to the
Main Menu. Pressing the Back will not save the alteration or the clearing but return directly.
The highlighted option is the current selected option as bellow:
(Note: if the BLT is 0, it indicates the backlight is not turned off; if the AOT is 0, it indicates
non-auto power off)
VII.
VII.
VII.
VII.Calibration
Calibration
Calibration
Calibration Method
Method
Method
Method
To ensure the measurement accuracy of the instrument, calibration should be conducted on a
regular basis (it is recommended to calibrate once every three months) and recorded strictly.
During
During
During
During calibration,
calibration,
calibration,
calibration, calibration
calibration
calibration
calibration cap
cap
cap
cap should
should
should
should be
be
be
be added
added
added
added to
to
to
to the
the
the
the sensor
sensor
sensor
sensor (except
(except
(except
(except for
for
for
for zero
zero
zero
zero
calibration).
calibration).
calibration).
calibration). After
After
After
After installing
installing
installing
installing the
the
the
the calibration
calibration
calibration
calibration cap,
cap,
cap,
cap, import
import
import
import the
the
the
the standard
standard
standard
standard gas
gas
gas
gas through
through
through
through the
the
the
the end
end
end
end
of
of
of
of standard
standard
standard
standard gas
gas
gas
gas cap
cap
cap
cap of
of
of
of the
the
the
the gas
gas
gas
gas pipe
pipe
pipe
pipe and
and
and
and the
the
the
the other
other
other
other end
end
end
end of
of
of
of the
the
the
the gas
gas
gas
gas pipe
pipe
pipe
pipe is
is
is
is connected
connected
connected
connected with
with
with
with a
a
a
a
safe
safe
safe
safe place.
place.
place.
place.
The instrument could be calibrated in 2 methods: the soft and hard. If hardware
calibration required the opening of battery cap of the instrument, use a small slotted
screwdriver to rotate the knob of calibration potentiometer (to avoid shock resulting in the
knob loosening which will bring errors to the measurement, the knob should be fixed by soft
