Electronics Verification
March 2016
Reference Manual
00809-0100-4772, Rev FA
152
Electronics Verification
C.2.4 Exiting flow simulation
Under Simulation Control, select Sim Disabled. Cycling power will also return the
transmitter to normal oeration.
C.2.5 Electronics verification using an external frequency
generator
The internal frequency source on the flowmeter is not NIST traceable. As such, it may be
necessary or preferred to use an external frequency source for electronics verification. The
following steps are required to perform this operation.
Tools needed:
FOUNDATION Fieldbus-compliant host or Field Communicator
Sinewave/function generator
Use the following procedure:
1. If removing the electronics housing, refer to “Removing the electronics housing”
on page 93.
2. Remove the electronics compartment cover.
3. If applicable, remove the LCD display.
4. Establish communication to the device using a F
OUNDATION Fieldbus-compliant host
or Field Communicator.
5. In the Transducer Block, set the Simulation Control to Sim External Generator. This
is important if the meter is online because it will electrically disconnect the flow
sensor from the electronics. This will eliminate any confusion as to what signal
(flow sensor or external source) the electronics is processing.
6. Use one of the following methods to properly insert the external flow signal:
If the electronics are connected to the flow sensor body, connect the
external frequency source to the TEST FREQ IN and the ground tab shown
in Figure C-10.
If the electronics have been removed from the flow sensor body, connect
the external frequency source to TEST FREQ IN and the external threads of
the sensor header as shown in Figure C-11.
Alternatively, if the electronics have been removed from the flow sensor
body, the external frequency source can be input as shown in Figure C-12.
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