107
Rosemount 8600 Vortex Flow Meter
Reference Manual
May 2019
Electronics Verification
00809-0100-4860, Rev BF
C.2.4 Electronics verification using an external frequency
generator
If an external frequency source is desirable, then test points on the electronics are available
(see Figure C-2).
Tools needed
Field Communicator or AMS
Standard sinewave function generator
1. Remove the electronics compartment cover.
2. Remove the two screws and the LCD indicator if applicable.
3. Connect a Field Communicator or AMS to the loop.
4. Access the flow simulation menu on the communicator and select “Sim Flow
External.” This item is used with an External Frequency Generator. This will
effectively disconnect the Rosemount 8600D sensor input from the charge
amplifier input of the electronics (see Figure 5-2 on page 70). The simulated flow
and/or the shedding frequency values will now be accessible via the Field
Communicator or AMS.
5. Connect the sinewave generator to the “TEST FREQ IN” and “GROUND” points as
shown in Figure C-2.
6. Set the sinewave generator amplitude to 2Vpp±10%.
7. Select the desired sinewave generator frequency.
8. Verify the generator frequency against the frequency displayed on the Field
Communicator or AMS.
9. Exit the Flow Simulation Mode.
10. Reconnect the LCD indicator option (if applicable) to the electronics board by
replacing and tightening the two screws.
11. Replace and tighten the electronics compartment cover.
Note
To manually disconnect the sensor for precautionary measures, see Replacing the
electronics housing on page 77 for details.
FastKeys
1, 2, 4, 3, 2
FastKeys
1, 2, 4, 4
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