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To invoke Actual Zero:
1. Access the [Zero Flow Adjust] option list by pressing <Right Arrow>.
2. Press <ENTER>. A pop-up window prompts you to set the current flow rate (in selected
rate units) to equal zero (0.000).
Note
If a flow offset is desired (i.e., to test analog outputs) then press <Right Arrow> to enable
numeric entry.
3. Press <ENTER> to start the Actual Zero process.
When you send the command, the flow meter analyzes the current flow rate for up to sixty
seconds, integrating (averaging) the data for the best zero correlation. During this time, the
menu prompt at the top of the display screen shows a timer that counts from zero to sixty.
You can allow zero averaging for the entire period, or cancel the process at any time by
pressing the <ENTER> key. This controls the amount of data the flow meter averages to
obtain a zero level.
Using ReversaMatic
If site conditions do not permit stopping the flow rate at the mounting location, and you do
not know the current flow rate, then you can use the ReversaMatic routine to establish the
zero flow level. You should perform the ReversaMatic procedure as quickly as possible to
ensure that the flow rate remains constant throughout the procedure.
To invoke ReversaMatic:
1. To access the [Zero Flow Adjust] option list press <Right Arrow>.
2. Move the cursor to [ReversaMatic]. Press <ENTER> to invoke the routine.
3. The flow meter begins to measure the positive flow rate. "Positive" flow refers to flow
moving from upstream sensor location to the downstream sensor location. Note top
prompt line shows: Reversamatic Action
4. Upon completion, the flow meter beeps and the display screen shows: Reverse Sensors /
Press <ENTER>
5. Now remove then remount the upstream and downstream sensors in their reversed
positions. Mount the Up sensor (without removing its cable) in the Down sensor/cable
location. Mount Down sensor with its cable in the Up sensor/cable location. When
remounting the sensors, couple them to the pipe properly. Press <ENTER> (after re-
installing the sensors).
6. The flow meter measures the negative flow rate briefly, then beeps and repeats the
prompt:
7. Now remount the sensors for normal operation (in their original orientation). When
remounting sensors, couple them to the pipe properly. Press <ENTER> (after re-installing
the sensors).
FUE1010 IP65 NEMA 4X
Operating Instructions, 12/2014, A5E03086491-AC
Connecting
5.5 Sensor Installation
81
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