YOKOGAWA RC400G, User Manual

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<5. Converter Operation>
5-8
IM 12F4A1-01E
(c) [v] key (numeric value decreasing key):
The numeric value in the selected digit decreases in turn every time this key is pressed and
when it reaches 0 then next time it returns to 9. In the most significant digit, “-” (minus sign)
is inserted next to 0. However, if negative numbers do not exit in the displayed data, that
sign is not inserted.
(d) [ENT] key (entry key)
This is used for entering the displayed data. When data is entered, the entire displayed data
flashes only once.
(4) Operation Command Keys-1
Operation of operation command keys-1 is valid in modes other than <MEAS.> mode.
Operation command keys-1 include the following three keys:
(a) [CELL] key (cell motor ON/OFF key):
The cell motor which operates the indicator electrode operates/stops every time this key
is pressed. When the cell motor is stopped, <CELL> lamp which has lit during running
extinguishes.
(b) [PUMP] key (metering pump ON/OFF key):
The sample water and reagent metering pumps operate/stop every time this key is pressed.
When the metering pumps are stopped, <PUMP> lamp which has lit during running
extinguishes.
(c) [AIR PUMP] key (air pump ON/OFF key):
For an analyzer which is provided with an air pump, the air pump operates/stops every time
this key is pressed. When the air pump is stopped, <AIR PUMP> lamp which has lit during
running extinguishes.
Even if the air pump is not provided, <AIR PUMP> lamp lights/extinguishes every time the
key is pressed.
NOTE
If “on” is selected with function code “d.” in <PROGRAM.1> mode, the air pump automatically
operates when <MEAS.> mode is selected, even if the air pump operation is set to be stopped.
(5) Operation Command Keys-2
Operation of operation command keys-2 is valid in modes other than <MEAS.> mode. Operation
command keys-2 include the following six keys shown in Table 5.7. These keys are for operating/
stopping solenoid valves for the measuring tank and the sand filter cylinder cleaning.
Accordingly, none of these keys are used in the “the RC400G-1 residual chlorine analyzer for tap
water” which does not incorporate cleaning functions for measuring tank and sand filter cylinder.
Also, in “the RC400G-2 residual chlorine analyzer for raw water”, although cleaning functions are
provided, only [SV1] and [SV2] keys are used.
When a solenoid valve is operating, the relevant lamp lights. If, to whatever operating condition
each solenoid valve state is changed using key operation, the normal state is restored by
selecting <MEAS.> mode.
The relevant lamp to that key lights/extinguishes every time the relevant key is pressed, even
when no solenoid valve is provided.
14th Edition : Jul. 15, 2020