Model DT33x-0700
4-Wire DC I/V Dual Transmitter w/USB
Acromag, Inc. Tel: 248-295-0880
- 22 -
http://www.acromag.com
- 22 -
https://www.acromag.com
Calibration (Optional)
CAUTION-Input Calibration:
Driving inputs
outside of its nominal input range will not be
acceptable for calibration of zero or full-scale.
Since your input signal levels cannot be validated
during calibration, incorrect signal levels will
produce an undesired output response.
Once you have configured the unit channel(s), you can install it in the
field, as the unit has already been factory calibrated. But if at some
point, you encounter excessive I/O error, you can optionally click the
Calibration
tab to display the Calibration control page as shown at
left.
IMPORTANT:
The unit has already had its inputs and outputs factory
calibrated with a high level of precision. If you attempt to recalibrate
an I/O channel, you could degrade its performance if
you don’t do it
properly, or you do it using low grade equipment. Consider your
decision to recalibrate carefully.
Before you calibrate an input, set its input filter as desired in your
application before calibrating. Calibration of any stage of this model
is a simple two-part process initiated by simply clicking the Input Cal
or Output Cal
“
...
Instructions”
button to begin the process and then
follow the on-screen prompts to continue.
CALIBRATION
–
Each Input Separately
Before attempting input calibration, set the nominal Input Range and
input filter
on the “
Configuration
” page
and make sure you write your
selection to the unit by clicking
[Send I/O Config].
For the DT336,
wire an input current source to the left-most input terminal of TB1-1
(CH1) or TB3-1 (CH2), or a voltage source to the right-most terminal
of TB1 (CH1) or TB3 (CH2). The center terminal TB1-2 or TB3-2 is the
signal return for either input path of the channel. For DT337/338
models, the left and right outer-most terminals are for different
nominal ranges of voltage input.
After setting the input range you wish to calibrate, select Channel 1
or 2 as required. Then click its
[Input Cal Instructions]
button to
begin input calibration and enable the Input [Zero] and [Full-Scale]
buttons.
Click the Input
[Zero]
and you will be prompted to input the
minimum value of your selected input range at the appropriate input
channel. For DC current or voltage, this will be the range minimum
at the input terminal and varies with the Input Range selected
(calibration does not use the scaled range zero, but the zero of the
nominal input range selected). Once you input the zero precisely,
click the
[OK]
button and follow the on-screen prompt to calibrate
zero.
Click the Input
[Full-Scale]
and you will be prompted to input the full-
scale value of your selected input range at the appropriate input
channel. For DC current or voltage, this will be the range minimum
at the input terminal and varies with the Input Range selected
(calibration does not use the scaled range zero, but the zero of the
nominal input range selected). Once you input full-scale precisely,
click the
[OK]
button and follow the on-screen prompt to calibrate
full-scale.
