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4–20 mA Output
Section 4
5. Select an Input Channel (e.g., channel 1, 2, 3, or, flow, etc.) to assign to
that output. Press the
CHANGE CHOICE soft key to cycle through the
channel names. When the desired channel is displayed, press the
ACCEPT soft key to pick that channel.
6. Assign a channel value to the 4 mA current value. This value is typically 0,
however any value can be set. In other words, enter the value of the input
needed to generate 4 mA of current at the output.
7. Assign an input value to the 20 mA current level.
8. Repeat this process to configure the other 4–20 mA output.
4.1.2 Calibrating the 4–20 mA Output
After wiring the 4–20 mA connection perform a 4–20 mA output calibration.
The 4–20 mA output calibration requires a multimeter and an interface or
access to the 4–20 mA current loop wiring. Two 4–20 mA outputs are
available and are designated Output A and Output B. Both outputs are
calibrated the same way and are isolated from each other.
Calibration may be performed while the 4–20 mA device is in the current loop,
as shown in Figure 28 or disconnected from the current loop as shown in
Figure 29. In either case, the multimeter must be set to a 20 milliamp dc range
or greater.
1. From the Main Menu, select
OPTIONS > ADVANCED OPTIONS >
CALIBRATION > 4–20 mA OUTPUTS.
2. Connect a multimeter to the 4–20 mA current outputs per Figure 28 or
Figure 29.
3. Make sure that the 4–20 mA output is enabled. If it is not enabled, press
the
CHANGE CHOICE soft key so that the display shows ENABLED and
press the
ACCEPT soft key.
4. Select the output (A or B) to calibrate.
5. Press any key to set the selected output to 4.00 mA dc.
11:00 AM 21 - APR - 01 4–20 mA OUTPUTS
ACCEPT
CHANGE
CHOICE
INPUT CHANNEL:
CANCEL
FLOW
SELECT APPROPRIATE UNITS
11:00 AM 21 - APR - 01 4–20 mA OUTPUTS
ACCEPT
4 mA INPUT VALUE
CLEAR
ENTRY
0.00 mgd CANCEL
SELECT APPROPRIATE UNITS