YOKOGAWA TB400G-A1 Series, Руководство пользователя, Страница: 50 / 140

<4. OPERATION>
4-1
IM 12E04A02-02E
4. OPERATION
4.1 Preparation for Operation
For preparation, proceed with the work in turn according to the items in subsections 4.1.1 to
4.1.9.
Since the types and number of values vary with the speci
fi cations for sampling, automatic
cleaning, and automatic zero calibration (Suf fi x code: -NN, -A1, -A2, and -A3), see the piping
diagrams in Section 2.6. For meaning of the codes, see Section 2.3.
NOTE
When the detector is opened for preparation, take extreme care not to get the lenses in the
detector (in two places) dirty.
If they get dirty, clean the lenses (see Section 7.8).
4.1.1 Checking Piping and Wiring Conditions
Examine that the piping and wiring have been done properly.
4.1.2 Supplying Power
First con fi rm that the power supply is of the voltage and frequency that meet the speci fi cations.
Also, check that the cap of the fuse holder in the converter is securely tightened.
Turn on the power switch in the converter. Then, press the [MODE] key on the converter to go to
the <MAINT.> mode.
4.1.3 Supplying Zero Water
If the turbidity to be measured is higher than 200 mg/l, remove the fi lter element and use tap
water directly as zero water.
1. Supply tap water of the predetermined speci
fi cations (see Section 2.1) to the tapwater inlet.
2. Close all the values except V2 and SV4 (for the Suf fi x code: -A3).
Note: Use the value operating keys of the converter to operate SV1, SV2, SV3, and SV4.
3. Vent the air by loosening the knob of the air vent on the top of the fi lter until tap water spills
over. After air venting is completed, tighten the knob securely.
4. Loosen screw A at the lower part of the detector (see Figure 4.1) to open the detector.
5. Gradually open V3 and con
fi rm that the water surface becomes as smooth as a mirror fi nish
as shown in Figure 4.2 (b).
3rd Edition : May. 31, 2010-00