Fuji Electric ZKMA, Инструкция по эксплуатации

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7.2 Manual calibration
Description

Span/zero is calibrated once by key operation.

Calibration must be made in the order of span and zero.

Perform calibration after a calibration gas is supplied to the detector and the output signal of the de-
tector becomes stable.

If the unit does not have an auto calibration function, the operator shall perform open and close opera-
tions, or adjust the flow rate of calibration gas.

During calibration, if the analog output hold function (maintenance hold) is enabled, the analog output
signal is held at the set value. Even after the calibration, the hold is maintained during the set time as a
measurement recovery time.
Procedu
re
Operation
(example)
Executes span calibration and zero calibration.
Key operation Description
Displayed message
(LCD)
(1) Display the screen on the right in accordance with the key op-
eration summary and press the
key
,
the manual span
calibration screen appears.
CALIBRATION MENU
MANUAL SPAN CAL.
(2)
Press the key to perform manual span calibration.
If supplying calibration gas manually (without the auto-
calibration function)
The operator shall open the span gas valve manually and adjust
the flow rate to 1.5 ± 0.5 L/min.
In the case of unit with the auto calibration function, an exter-
nal solenoid valve can be driven by using the contact output
signal from the terminal block.
MANUAL SPAN CAL.
START
(3) Oxygen concentration value and cell electromotive force are
displayed.
Wait until the oxygen concentration is stabilized.
MANUAL SPAN CAL.
20.61 % 000.1 mV
(4)
Press the key to determine the span calibration factor.
During the process, the oxygen concentration value and cell
electromotive force are highlighted.
MANUAL SPAN CAL.
20.61 % 000.1 mV
(5) After the calibration is completed, the display returns to the
screen on the right.
CALIBRATION MENU
MANUAL SPAN CAL.
(6) If the operator opened the span gas valve manually, close the
valve.
(7) Display the screen on the right in accordance with the key op-
eration summary and press the
key
,
the manual zero
calibration screen appears.
CALIBRATION MENU
MANUAL ZERO CAL.