Precision Digital Corporation Helios PD2-6080, Инструкция по эксплуатации

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Instruction Manual
67
Analog Output Calibration
•
There is no need to recalibrate the 4-20 mA
output when first received from the factory.
•
The 4-20 mA outputs is factory calibrated prior
to shipment. The calibration equipment is
certified to NIST standards.
The 4-20 mA output can be recalibrated in the field. A
calibrated digital meter with an input range of at least
25 mA and a resolution of 1
μA is recommended.
• If an uncalibrated meter or a meter with less
resolution is used, the calibration of the 4-20 mA
output could be adversely affected.
Analog Output Calibration
Procedure
1. Wire the PD2-6080/1 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 22. 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 .
4. The display will show
4 nmA
. The PD2-6080/1
mA 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 .
5. The display will show
20 nmA
. The PD2-6080/1
mA 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 PD2-6080/1 will now calculate the calibration
factors and store them.
7. Press Menu to exit and return to Run mode.