Cameron NUFLO MC-III EXP, Руководство пользователя

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MC-III™ EXP Flow Analyzer Section 4
I
MIN
= minimum current output (4 mA)
High = programmed flow rate that produces a 20-mA output
Low = programmed flow rate that produces a 4-mA output
RATE
CURR
= flow rate
Figure 4.29—4-20 mA output configuration
Enabling 4-20 mA Output
By default, the 4-20 mA output option is disabled. To enable this feature, perform the following steps:
1. Check the “Enable” checkbox.
2. Click on the pencil icon next to the Low Flow Rate field to launch a data-entry window (Figure 4.30) and
enter the “low” or “zero” flow rate value that will produce a 4-mA output. Adjust the decimal position,
if necessary, using the slide bar. A flow rate less than or equal to this minimum setpoint will result in an
output of 4 mA.
3. Click on the pencil icon next to the High Flow Rate field and enter the “high” or “full-scale” flow rate
value that will produce a 20-mA output. Adjust the decimal position, if necessary, using the slide bar. A
flow rate equal to or greater than this maximum setpoint will result in an output of 20 mA.
Figure 4.30—Data-entry screen for 4-20 mA low and high values
4-20 mA Output Testing
The MC-III software allows users to test the 4-20 mA output by entering an output current value and reading
the live value generated in response.