YOKOGAWA RC400G, Руководство пользователя

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<4. Operation>
4-6
IM 12F4A1-01E
4.2.3 Checking the Sand in the Sand Filter
This is a check to be performed when a residual chlorine analyzer for raw water or treated water
is used.
Confirm that the sand filter is filled with sand up to the scale “10” position of the filter cylinder. If
lacking, replenish the sand by opening the upper cover of the cylinder. Use filter sand having an
effective dia. of 0.6 mm and uniformity coefficient of 1.4 as adopted in filtration plants.
4.3 Startup
Proceed with the work sequentially in accordance with subsections 4.3.1 to 4.3.12.
Prior to starting work, reviews chapter 5 and 6 to understand the outlines of the key operations
and analyzer operation.
4.3.1 Confirming Tubing and Wiring Implementation
Confirm the proper connections of tubing and wiring to the residual chlorine analyzer referring to
sections 3.2 and 3.3.
4.3.2 Feeding Sample Water and Adjusting Flow
(1) Feed sample water with the ball valve (*1) in the sample water line at the rear of the
analyzer fully closed.
*1: RC400G-1 For tap water: V1 (see subsection 3.2)
RC400G-2 For raw water: V3 (see subsection 3.2)
RC400G-3 For treated water: V3, V4 (see subsection 3.2)
(2) Gradually open the ball valve described in (1) to feed the sample water at the predetermined
rate (*2).
*2: RC400G-1 For tap water: 1 to 4 l/min
RC400G-2 For raw water: 5 to 10 l/min
RC400G-3 For treated water: 10 to 20 l/min (5 to 10 l/min for one stream)
Adjust valve opening so that the sample water flows out of the drain port on the side of the head
tank or sand filter keeping the drain water at the level of one quarter of the drain port diameter.
4.3.3 Supplying Cleaning Water
This step is necessary only for an analyzer for raw water (the RC400G-2) or treated water (the
RC400G-3) measurement. Supply cleaning water at a pressure of 100 to 500 kPa to the analyzer.
In so doing, leave the ball valve in the cleaning water line, (V4 for raw water), (V6 for treated
water), at the rear of the analyzer, open. Also, keep the ball valves in the filter sand cleaning line
located under the sand filter and in the glass bead cleaning line [V1, V2 (for raw water)], [V1, V2,
V5 (for treated water)] fully closed after confirming that no cleaning water leaks from the solenoid
valve in the "closed" state.
4.3.4 Turning on Power
First confirm that the power supply voltage and frequency meet the analyzer specifications. In
addition, verify to ensure that the converter fuse holder cap is not loose.
The analyzer itself has no power switch. It operates by the turning On of a switch provided in the
power line.
When the power is supplied, analyzer start in <MEAS.> mode and metering pump and cell motor
which rotate indicator electrode are always turned on.
After starting analyzer operation, press [MODE] key in the converter to enter in <MAINT.> mode.
Note: When option code “/ARS” (with flame arrester) is specified, there is a power switch (circuit breaker) in the power terminal box.
14th Edition : Jul. 15, 2020