YOKOGAWA Vigilant Plant EXA TB Series, Руководство пользователя

Страница: 42 / 140

<3. INSTALLATION, PIPING, AND WIRING>
3-3
IM 12E04A02-02E
3.2 Piping
3.2.1 TB400G- □ - □ -NN (without sampling system)
(1) Measuring water piping
For a sample fl ow of 1.5 to 2 l/min, the sample can be introduced directly into the detector.
Connect the attached OD-33 mm/ID-25 mm black soft PVC pipe to the Sample inlet. However,
if the sample fl ow exceeds the range of 1.5 to 2 l/min, satisfy the fl ow condition by providing, for
example, a head tank (constant level tank) also used for bubble removal. In this case, also use
an OD-33 mm/ID-25 mm black soft PVC pipe for the piping connection between the head tank
and the detector.
(2) Drain piping
Connect an OD-33 mm/ID-25 mm black soft PVC pipe to the drain outlet of the detector. In doing
this, carefully run the piping so that a trip does not form in the pipe. If water is trapped in the drain
piping, the detector may be harmed by becoming fl ooded.
(3) Cleaning water piping
The cleaning water inlet of the detector is sealed with a blind plug.
Note: If a low turbidity (less than 200 mg/l) is to be measured, prepare a sampling system
which allows a supply of zero-calibration water (tap water fi ltered with a zero-turbidity
fi lter).
Cleaning water inlet
Sample inlet
Hose joint
for ID-25 mm hose
Sample outlet
Hose joint
for ID-25 mm hose
F0303.ai
Figure 3.3 Detector Piping Connections
3.2.2 TB400G- □ - □ -A1, -A2, and -A3 (with sampling system)
(1) Sample-water piping
This is piping to supply sample to the detector. The pressure and fl ow rate for the Sample are 20
to 500 kPa and 2 to 10 l/min, respectively. Piping connections are designed for a rigid PVC pipe
of nominal size VP16 (OD-22 mm). Do the piping using any fl anges or unions conforming to the
pipe diameter.
3rd Edition : May. 31, 2010-00