Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: 248-295-0880
- 27 -
http://www.acromag.com
- 27 -
https://www.acromag.com
Calibration
…
Note:
After calibration, if your output acts erratic or
appears imprecise, you may need to repeat the
calibration, being very careful to take accurate
measurements and input correct signal levels. If you
are measuring voltage across an output load
resistance to measure the current level
(recommended), make sure you use exact measured
resistance when calculating the loop current. When
rescaling, make sure that you have adequate input
span, as
spans set “
too-tight
”
have diminished
resolution and magnified error.
CALIBRATION
–
Each Output
Click the
[Output Cal Instructions]
button to begin output
calibration and enable the Output [Zero] and [Full-Scale] buttons.
Select the Output Channel to calibrate with the Output Channel
pull-down to the right of its field.
Adjust the channel input signal as necessary to drive its output
current to precisely 4.000mA. Measure this level accurately or
performance will be degraded. With the output at precisely
4.000mA, click Output
[Zero]
of the Calibration-Output section to
calibrate/store the output zero level.
Next adjust the input signal to drive the output current to
precisely 20.000mA. Measure this level accurately or
performance will be degraded. With the output precisely
20.000mA, click Output
[Full-Scale]
of the Calibration-Output
section to calibrate/store the output full-scale level.
Repeat this process for the second output channel.
CALIBRATION - Temp Reference (TC Inputs only)...
This section calibrates the cold-junction temperature reference
used to Cold Junction Compensate T/C input measurements.
Click the
[Instructions]
button to begin reference calibration.
You will be prompted to connect a TC Type J, T, or B ice-point
reference to the input, depending on your TC input type selected
(J type is used for J, K, or T, T type for T, R, or S types, and the B
type has its cold junction calibrated separately).
FACTORY SETTINGS
–
Sanitation Tool
You can use the
[Restore to Factory Default]
button to return
the unit to its original factory state (see Specifications Reference
Test Conditions) and configuration settings. This does not
restore calibration, only configuration. Alternately, this button
can be used as a sanitation tool to restore the unit to its initial
configuration.
COMMUNICATION STATUS
This field displays calibration status messages like “No Error”,
“Transfer Error”, and “Timeout Error” during calibration. If you
encounter a Transfer or Timeout Error, you should repeat the
calibration process.