Brooks Instrument BM50 - Manual (Page 56)

4-8
Section 4 Maintenance Installation and Operation Manual
X-PD-BM-Ovals-eng
Part Number: 541B031AAG
January, 2009
BM Oval Series
Flowrate: 8mm character-size or 17mm character-size - 5 digits. Settings
independent of TOTAL. Measuring units: mL, L, m3, Gallons, KG, ton, lb, bl,
cf, rnd, no unit. Time units: second, minute, hour, day. K-factor: 7 positions
0.000010 - 9,999,999. Number of decimals: max. three.
Problem Solving
In this appendix, several problems are included that can occur when the
Standard Display in operation.
Flowmeter does not generate pulses:
Check:
- Flowmeter, wiring and connection of terminal connectors,
see Section 4-3.
Flowmeter does generate “too many pulses”:
Check:
- Settings for Total and Flowrate: SETUP 11-14 and 21-27.
- Proper grounding of the Standard Display, see Section 4-3.
- Use screened wire for flowmeter signals and connect screen to terminal
3.
Flowrate Displays “0/zero” while there is flow (Total is counting)
Check:
- SETUP 22 / 25: are the K-factor and time unit correct?
- SETUP 26 / 27: The unit has to count the number of pulses according to
setup 26 within the time according to setup 27.
Make sure that 27 is set to eg.10.0 seconds. The result is that the unit has
at least 10 seconds time to measure the number of pulses according to
setup 26.
The password is unknown:
If the password is not 1234, there is only one possibility left: call your
supplier.
ALARM
When the alarm flag starts to blink an internal alarm condition has
occurred. Press the “select button” several times to display the 5-digit error
code. The codes are:
0001: irrecoverable display-data error: data on the display might be
corrupted.
0002: irrecoverable data-storage error: the programming cycle might have
gone wrong: check programmed values.
0003: error 1 and error 2 occurred simultaneously
The alarm condition will almost certainly be handled internally and if all
mentioned values still appear correct, no intervention by the operator is
needed. If the alarm occurs more often or stays active for a longer time,
please contact your supplier.