YOKOGAWA RC400G, User Manual

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<5. Converter Operation>
5-26
IM 12F4A1-01E
The setting key operation procedure is shown below.
(a) Select function code "A". → 00050 %
(b) Press [>] key. → 0 0050 %
(Leftmost digit flashes.)
(c) Select the digit using [>] key and set a numeric value
using [Λ] and [v] keys. → 000 4 0 %
(Last set digit flashes.)
(d) Press [ENT] key to enter it. → 00040 %
(Entire display once flashes.)
For inputs out of the setting range, “not” is displayed. Reset the display by pressing [>] key and
set it again.
(7) Concentration Upper Limit Alarm Setpoint Setting (Function code “b”)
If the “upper limit alarm function execution” is selected with function code “5.” in <PROGRAM.2>
mode, when the residual chlorine concentration (indication) exceeds the setpoint, <FAIL> lamp
lights and if in <MEAS.> mode, <failure> contact signal is output.
The range that can be set as the upper limit alarm value is 0.00 to 11.00 mg/l.
The setting key operation procedure is as follows:
(a) Select function code "b". → 011.00 mg/l
(b) Press [>] key. → 011.00 mg/l
(Leftmost digit flashes.)
(c) Select the digit using [>] key and set a numeric value
using [Λ] and [v] keys. → 001. 50 mg/l
(Last set digit flashes.)
(d) Press [ENT] key to enter it. → 001.50 mg/l
(Entire display once flashes.)
For inputs out of the setting range, “not” is displayed. Reset the display by pressing [>] key and
set it again.
(8) Out-of-Sample Detection Concentration Setting (Function code “c”)
This concentration has been set at the value of the 0.10 (mg/l) on shipment.
In this case, if it is assumed that the sample residual chlorine concentration in the normal state
is below 0.10 mg/l, an approx. three minute out-of-sample detection in a ten-minute cycle is
performed and the output signal is held during the detecting operation.
If the operating conditions are relevant to this case, and if difficulty exists for output signal hold,
change the setpoint. As the out-of-sample detection concentration, take approximately 50 % of
the sample water residual chlorine concentration value.
The key operation procedure for out-of-sample detection concentration setting is shown below.
(a) Select function code "c". → 000.10 mg/l
(b) Select the digit using [>] key and set a numeric value
using [Λ] and [v] keys. → 000.0 5 mg/l
(c) Pressing [ENT] key sets the data. → 000.05 mg/l
(Entire display flashes once.)
For out-of-sample detecting operation, see subsection 6.1.3.
14th Edition : Jul. 15, 2020