< 4. OPERATION >
4-5
IM 12A0V2-E
4.5 ST401G-PF--A/AZC (With auto zero
calibration for free available chlorine analyzer and
pH converter system)
Open ball valve (BV1) completely, (BV3) closed. Adjust ball valve (BV2, BV4) and needle valve (NV1)
and make the fl ow rate into pH fl ow-though type holder between 3 and 10 l/min and into free available
chlorine detector between 0.1 and 2.5 l/min.
(BV3) is used for manual zero adjustment and washing. To stabilize the zero fi lter with water, refer to
Sec. 6.2.7 of IM 12F5A1-01E.
Refer to Figure 4.5 for piping.
BV3
PR1
BV1
X
Drain
X
=
X
SV1
F1
NC
COM
NO
BV2
=
=
=
=
=
=
=
(VP40)
FCC
FCD
PVC tray
NV1
=
=
PHS
UCL
PHC
(VP16)
Measuring
water
PHH
BV4
TK1
=
VP40 pipe
pipeVP16X
φ
22 /
φ
15 soft tube with net
φ
6 /
φ
4 Polyethylene tube
<Tubing materials>
φ
12 /
φ
9 Polyethylene tube
BV1,2,3,4 : Ball valve
PR1 : Pressure-reducing valve
FCC : Free available chlorine converter
FCD : Free available chlorine detector
NV1 : Needle valve
F1 : Activated charcoal filter
SV1 : 3-way solenoid valve
PHC : pH converter
PHH : Flow-through type holder
PHS : pH sensor
TK1 : KCl tank
ULC : Ultrasonic oscillator (Suffix code: -U)
Figure 4.5 Piping diagram of ST401G-PF--A/AZC
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