Siemens 7MF4033 series, Руководство пользователя

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UMSITRPDS3-1 Post-Installation Test
November 2010
5-11
5.5.3 Measuring Vapor
Operate the shutoff valves in the following order. Refer to Figure 5-6 to identify the valves used in the
procedure.
Caution
The measuring result is error-free only when the active pressure lines (4) contain
equal columns of condensate that are at the same temperature. Repeat the zero
adjustment when these conditions are satisfied.
If the compensation valve (2) is opened when the shutoff valves (5) and active
pressure valves (3) are both open, the transmitter (1) may be damaged by flowing
vapors.
1. Open both shutoff valves (5) at the pressure taps.
2. Open the compensation valve (2).
3. Wait until the vapor in the active pressure lines (4) and in the compensation vessels (13) has
condensed.
4. Open the active pressure valve (3A) and the vent valve at the high-pressure chamber of the
transmitter (1) slightly until air-free condensate emerges.
5. Close the vent valve.
6. Open the vent valve at the low-pressure chamber of the transmitter (1) slightly until air-free
condensate emerges.
7. Close the active pressure valve (3A).
1 Transmitter
2 Compensation valve
3 Active pressure valves
4 Active pressure lines
5 Shutoff valves
7 Blowout valves
10 Active pressure taps
13 Condensation vessels
14 Insulation
FIGURE 5-6 Measuring Vapor
8. Open the active pressure valve (3B) slightly until air-free condensate emerges, then close it.
9. Close the vent valve at the low-pressure chamber (1).
10. Open the active pressure valve (3A) by 1/2 turn.