Phase 4 - Transmitter Operation; Flow Measurement - ABB 2600T Series Instructions For Installation And Commissioning

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.
B
C
A
L
Fig. 5.2a - GAS Service
- 18 -
H L
C
A B
3-valve manifold
H
Flow
1
0
1 2 3 4 5 6
Fig. 5.1 - Default Dip switches settings
Orifice plate
Flow
Vent/drain
valve
H L
A
C
3-valve manifold
A
B
Fig. 5.2b - Liquid or Vapor Service
filling
tees
gate
valves
H L
C
B