<6. PROCEDURES FOR CONVERTER OPERATION>
6-16
IM 12E04A02-02E
9th Edition : Mar. 16, 2018-00
(7) Manual Start of Automatic Calibration (FUNCTION "7")
This is the operation to manually start the automatic calibration operation.
For specification of automatic calibration (Suffix code: -A3), this function can be used.
For details on automatic calibration, see Subsection 4.2.3.
The following is the procedure for this function.
(Example of display)
(1) Select FUNCTION "7" in the <MAINT.> mode.
=> "A_CAL" is displayed.
(2) Press the [ENT] key.
=> The CAL lamp flashes and automatic
calibration starts.
(3) The predetermined calibration operation is
=> A turbidity value is displayed during
carried out.
calibration.
(4) Termination
=> "End" is displayed. The CAL lamp
If cleaning is to be repeated, operate from
goes out.
step 2 again.
Even if "contact output during automatic cleaning and calibration" is selected as an auxiliary
contact output, the contact is not actuated in a manual start of the automatic calibration operation.
A digital output is also not sent out.
During calibration, the calibration operation can be stopped if the mode of the function is moved
to another mode or function using the [MODE] key or [FUNC] key. In this case, the solenoid valve
automatically returns to the statuses at the start of measurement.
If a similar operation is performed after completing the calibration computation, that calibration
becomes effective.
(8) Reference Sensitivity Calibration (FUNCTION "8")
The reference sensitivity is determined in this operation using the standard solution upon the
shipment from the factory. The sensitivity obtained at that time is the basis for an abnormal
sensitivity check at normal span calibration and for the sensitivity (slope) display. Usually, this
function is not used except upon shipment from the factory. The valve operations and supply
procedure for the standard solution are the same as those at span calibration. For details, see
Section 7.7.
The following is the procedure for this function.
(Example of display)
(1) Select FUNCTION "8" in the <MAINT.> mode.
=> 0105.0 mg/L
(2) Wait until the display becomes stable, and
=> 0105.0 mg/L
then press the [ENT] key.
The CAL lamp flashes.
(3) Press the [>] key.
=> 00000. mg/L
The display is now ready for
determination of the decimal point
position.
(4) Press the [>] key to determine the position of
=> 000.00 mg/L
the decimal point.
Every time the key is pressed, the decimal
point moves to the right and when the least
significant digit is reached, it moves to the
second digit from the left.
(5) Press the [ENT] key.
=> 0
0
00.0 mg/L
The second digit from the left flashes
and waits for the turbidity setting.
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