YOKOGAWA RC400G, Руководство пользователя

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<5. Converter Operation>
5-23
IM 12F4A1-01E 14th Edition : Jul. 15, 2020
If it is found that inconvenience such as calibration is not performed because of the error (“Err22”)
occurrence is caused by the difference between the employed method and manual analytical
methods, set a reference sensitivity conforming to the employed manual analytical method.
NOTE
If “Err22” is not detected on adopting a manual analytical method other than amperometric
titration, it is unnecessary to change the reference sensitivity.
Next, the key operation procedure for setting the reference sensitivity is described.
(a) Select function code "4". → 002.62 µA
(b) Select [>] key and set a numeric value using [Λ] and [v]
keys. → 002. 0 2 µA
(c) On pressing [ENT] key, setting is fixed. → 002.00 µA
(Entire display flashes once.)
When span is calibrated after resetting the reference sensitivity, the slope value displayed by
function code “9” in <MEAS.> mode is updated to a value calculated based on the newly set
reference sensitivity.
When span calibration is executed using function code “d” in <MAINT.> mode, the reference
sensitivity is automatically updated.
If the reference sensitivity to be set is unclear, it is convenient to use this function.
(3) Applied Voltage Setting (Function code “5”)
This function sets a voltage to be applied across the electrodes. The key operation procedure for
setting is as follows:
(a) Select function code "5". → -00.40 V
(b) Press [>] key. → - 00.40 V
(Negative sign flashes.)
(c) Select the digit using [>] key and set a numeric value
using [Λ] and [v] keys. → -00. 5 0 V
(Last setting digit flashes.)
(d) Press [ENT] key to enter it. → -00.50 V
(Entire display once flashes.)
The permissible applied voltage setting range is -1.50 to 1.50 V. Since “not” is displayed for
out-of-range settings, reset this display using [>] key to set it again. When an applied voltage
is changed, it takes some time until indication is stabilized. Exercise care for this fact when
transferring to <MEAS.> mode.
(4) Parameter Setting for Response Checking (Function code “6”, “7”,
and ”8”)
This function sets parameters for detecting stability judgment and response failure automatically
executed when calibration is to be performed and when plateau characteristics are to be taken.
Table 5.18 shows parameters to be set. When plateau characteristics are to be taken, response
failure (Err23) detection is not conducted.
Table 5.18 Parameters for Response Checking
Function Code Setting Content Permissible Setting Range
6 Response time limit 0.1 to 10.0 min
7 Concentration for detecting indication stabilization 0.01 to 2.00 mg/l
8 Detecting time for detecting indication stabilization 2 to 180 sec
Figure 5.8 shows the judgment method for indication stabilization.