Yokogawa GD40 Gas Density Detector User Manual
Page 34
<2. Installation, Wiring and Piping>
2-11
IM 11T3E1-01E
Note 1: P1 (Inlet pressure) <= Max. 0.5 MPa (71 psi)
Note 2: P1 (Inlet pressure) - P2 (Outlet pressure) >= 0.5 kPa (0.071 psi) (depending on the size and length of the pipe)
Note 3: Flowrate = 0.1 to 1 l/min
Note 4: The cylinder pressure must be reduced to P1 (Inle t pressure).
Sample gas line
Switching valve
Flowmeter
Note 3
Gas for zero
calibration
Gas for span
calibration
Note 1
P1
Note 2
P2
Note 4
Note 4
Detector unit (EJA and GD40 detector
mounted on plate)
(Supplied by Yokogawa)
Supplied by customer.
Pressure regulator
for gas cylinder
Filter
EJA (Explosion-proof
pressure transmitter)
F0211.ai
(1) Example of Gas density and Calorie meters
Flowmeter
Note 2
Note 1
Note 3
Vent
Detector unit
CO
2
AIR
Explosion-proof
pressure transmitter
F0212.ai
P
Note 1 : P1 (Inlet pressure ) <= Max 0.5884 MPa (abs.)
Note 2 : Flowrate = 0.1 to 1 l/min
Note 3 : P1 (Input pressure ) - P2 (Output pressure ) >= 0.5 kPa
Note 4 : The cylinder pressure must be reduced to P1(Inlet pressure).
Generator
Calibration gas
P1
P2
Note 4
(2) Example of Hydrogen purity meter
Figure 2.10 System Configuration