Brooks, Models bm01 and bm02 – Brooks Instrument BM02 User Manual
Page 25
4-5
Installation and Operation Manual
X-PD-BM01-02-eng
Part Number: 541B042AHG
March, 2008
Maintenance
Brooks
®
Models BM01 and BM02
Table 4-1 Troubleshooting
Symptom
Possible Causes
Remedy
1. Counter will
1. Flowrate low.
1. Open the valve progressively.
not count.
2. Pump pressure or head
2. Taking pressure loss of the entire
pressure low.
piping system into account, select
a proper pump pressure or
head pressure.
3. Oval rotors are jammed with foreign
3. Disassemble the meter body by
matter.
referring to the meter body
disassembly and inspection
procedure. Wash clean the rotors
and related components.
4. Faulty hall effect sensor or
4. Replace meter cap.
reed switch.
5. Faulty magnet.
5. Replace rotors.
6. Rotors installed in wrong position.
6. Refer to correct rotor positioning
assembly instructions.
2. Liquid leaks.
1. Incomplete pipe seals.
1. Check and tighten pipe connections or
replace gaskets.
2. Incomplete front cover seal of the
2. Check front cover fitting bolts for tightness
meter body.
and replace O-Ring with new one.
3. Counts while
1. Liquid leaks from valves or
1. Inspect valves and pipe connections
the valve
pipe connections.
for condition.
remains closed.
2. Air builds up somewhere between
2. Let the air escape.
the valve and meter; pulsating
Provide a check valve and accumluator.
pump pressure causes a rocking
motion of the rotors.
4. Meter reading
1. Fluid flowrate is too low or
1. See "Specifications" for minimum and
inaccurate.
too high.
maximum flowrates.
2. Air in fluid.
2. Bleed air from system.
3. Excess wear caused by
3. Check meter body and rotors. Replace as
incorrect installation.
required. See "Installation" instructions.
5. Fluid will not flow
1. Foreign matter blocking rotors.
1. Dismantle meter, clean rotors (strainer
through meter.
must be fitted in line).
2. Line strainer blocked.
2. Clean strainer.
3. Damaged rotors.
3. Replace rotors (strainer must be fitted
in line).
4. Meter connections over tightened.
4. Readjust connections.
6. Reduced flow
1. Line strainer partially blocked.
1. Clean strainer.
through the meter.
2. Fluid is too viscous.
2. Max. viscosity 1000 centipoise.