Riken Keiki GD-F4A-A, Руководство по эксплуатации

Страница: 13 / 26

11
４－9．Example of piping connection
Gas inlet/outlet fitting of this unit is Rc 1/8 female screw and provided with brass coupling.
Applicable piping is φ8(O.D.)-1t copper pipe. Secure the piping connections not to leak.
The piping material will be changed depending on corrosive gas contained in a sampled gas. In such case,
contact RIKEN KEIKI Co., Ltd.
(1) In case of pump suction
(2) In case of pressurized sample gas
(3) In case of aspirator suction

It is also possible to apply air aspirator unit to sample the gas by utilizing instrumentation air.
In this method, pressure to the sensor must be kept as small as possible and make it to
-26hPa at a maximum.
As the load to oxygen sensor is high on this method, aspirator suction method shall be used
only when the pump cannot be used.

If the sample gas pressure would fluctuate, use the constant flow rate control valve to keep
the constant flow rate.

Exhaust the sampled gas to open air in principle. When make piping to exhaust side
necessarily, choose the piping diameter to keep the pressure loss due to the length of piping
within 13hPa.
Detection
point
GD-F4A-1
Gas OUT
1.0
± 0.3L/min
Dust filter
Pump
Flow control
valve
P
Flow meter
Dust filter
Detection
point
GD-F4A-1
Gas OUT
1.0
±
0.3 L/min
Flow control valve
Flow meter
Detection
point
GD-F4A-1
Instrumentation air
Air consumption
：
1
～
3NL/min
Pressure ： 0.1 ～ 0.34MPa
Dust filter
Flow control
valve
Aspirator
Flow meter
CAUTION