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FLOWMETER (BALL BEARING DESIGN)
Preventative maintenance requires that the Mini Flowmeter under go a
general inspection. Refer to Figure 4-I and the following procedure to
remove the flowmeter internals from the housing. A clean work area is
required.
15
Measurement_Systems
are constructed to give a long ser-
vice life. However, problems do occur from time to time and the following
points should be considered for preventative maintenance and repairs.
The bearing type used in the flowmeter was chosen to give compromise
between long life, chemical resistance, ease of maintenance and perfor-
mance. A preventative maintenance schedule should be established to
determine the amount of wear which has occurred since last overhaul.
In case the flow measurement system malfunctions or becomes in-
operative, refer to the Troubleshooting Guide in Section 5.
SERVICING AND PREVENTATIVE MAINTENANCE OF THE
3-l) so the current equals to SET (SPAN).
6.
Repeat steps 4 and 5 until no change is observed.
FOR VOLTAGE OUTPUT OPTION ONLY
7.
Connect a digital voltmeter across the voltage output terminals.
8. Inject the test frequency while adjusting “SPAN” potentiometer so
voltage equals to SET (SPAN).
SECTION 4 MAINTENANCE
4.1
4.2
INTRODUCTION
OMEGA ’s Flow
mA).
5.
Inject the test frequency while adjusting “SPAN” potentiometer (refer
to Figure
3-l) for desired “ZERO”
current (i.e., 4
milli-ammeter
or equivalent, across the current out-
put terminals.
4.
Adjust “ZERO” potentiometer (refer to Figure
FOR CURRENT OUTPUT OPTION ONLY
3.
Connect a digital