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Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Analog Output Programming
(AoutPr)
The Analog Output Programming menu is used to
program the behavior of the 4-20 mA output. The
following parameters and functions are programmed
in this menu:
1.
Source: Source for generating the 4-20 mA
output (e.g. PV)
2.
Overrange: Analog output value with display in
overrange condition
3.
Underrange: Analog output value with display in
underrange condition
4.
Max: Maximum analog output value allowed
regardless of input
5.
Min: Minimum analog output value allowed
regardless of input
6.
Calibrate: Calibrate the internal 4-20 mA source
reference used to scale the 4-20 mA output
Analog Output Source
The source for generating the 4-20 mA output may be
assigned to the process variable, maximum or
minimum value reached by the process, one of the
set points, or the Modbus PV input.
Analog Output Calibration
To perform the analog output calibration, it is
recommended to use a milliamp meter with a
resolution of at least 0.1 µA to measure the output
current. The values saved internally during this
procedure are used for scaling the 4-20 mA output in
the Setup menu.
Analog Output Calibration
Procedure
1.
Wire the PD2-6100 4-20 mA output to a current
loop that includes a power supply (internal or
external 12 to 24 VDC), and the mA input on the
digital meter. See Figure 29. 4-20 mA Output
Connections on page 21 for details.
2.
Turn on all devices. Allow for a 15 to 30 minute
warm-up.
3.
Go to the Advanced Features menu, and
navigate to the Analog Output Programming
(AoutPr)/Calibration (Calib) menu and press
Enter.
The display will show 4 nmA. The PD2-6100 mA
4.
output should now be close to 4 mA. Press Enter
and the display will show 04.000. Enter the actual
value read by the digital mA meter and press
Enter.
The display will show 20 nmA. The PD2-6100 mA
5.
output should now be close to 20 mA. Press
Enter and the display will show 20.000. Enter the
actual value read by the digital mA meter and
press Enter.
6.
The meter will now calculate the calibration
factors and store them.
7.
Press Menu to exit and return to Run mode.
46
Instruction Manual
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