Brooks Instrument BM02 - Manual (Page 22)

4-2
Installation and Operation Manual
X-PD-BM01-02-eng
Part Number: 541B042AHG
March, 2008
Brooks ® Models BM01 and BM02
Maintenance
4-3 Disassembly - General
Before proceeding with any disassembly, follow these steps:
1. Close all valves and isolate the meter from line pressure or back pressure.
2. If used at elevated temperatures, reduce temperature of meter (includ-
ing internals) to ambient.
3. Disconnect any electrical lines to or from the meter.
4. (See Figure 4-1) Reduce the pressure inside the meter to zero by
draining that section of the line which is isolated along with the meter. A
method other than removing the cover (Item 2) of the meter should be
used if available, i.e. strainer, drain plug, etc. If the pressure must be
reduced through the flowmeter, very slowly and carefully crack the
screws (Item 3) in the cover (Item 2) until the meter begins to drain
slowly thereby reducing the pressure to zero.
5. (See Figure 4-1) Drain the flowmeter completely by removing the cover
(Item 2) carefully.
6. Disconnect all tubing and/or wiring from meter mounted accessories.