- 18 -
L H
C
A
B
A B
C
H L
PHASE 4 - TRANSMITTER OPERATION
5. TRANSMITTER OPERATION
Use the following step to adjust the transmitter zero.
5.1 FLOW MEASUREMENT
1. The process fluid must enter the transmitter primary:
a. Close low pressure (B) and high pressure (A) valves
(fig. 5.2a and 5.2b).
b. Open gate valves and equalizing (C) valve.
c. Slowly open high pressure (A) valve to admit process
fluid to both sides of primary.
2. Vent (or drain) primary as follows:
a. Liquid service - Vent all entrapped air from both sides
of primary using vent/drain valves, then close them.
b. Gas service - Drain any condensate from both sides of
primary using vent/drain valves, then close them.
1 2 3 4 5 6
1
0
Fig. 5.2a - GAS Service Fig. 5.2b - Liquid or Vapor Service
Fig. 5.1 - Default Dip switches settings
3-valve manifold
Flow
3-valve manifold
Vent/drain
valve
Flow
Orifice plate
filling
tees
gate
valves
LH
A
B
C
H L
B
A
C
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