MiniPuck Model ST132-06x0 Two-Wire TC/mV Transmitter
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Acromag, Inc. Tel: 248-295-0880 Email:
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If the input zero and full-scale points are chosen too close together (span
too small), resolution is diminished, and the performance will be degraded.
A minimum effective span of 10mV is recommended. Also, you should pick
your values carefully, as you will have to precisely drive the corresponding
input signal values for zero and full-scale in order to calibrate your input
range later.
(Optional) Test Your Input…
The Test Input area of your screen is useful to view your continuously
variable input measurement in the field adjacent to the Start/Stop Polling
button.
Simply click the “Start Polling” toggle button, and the input will be
repeatedly polled and displayed in the adjacent field. Click this button again
to turn polling off.
Note that if CJC is ON, and your input signal is at 0°C (0.000mV), the
temperature value displayed will be equivalent to the ambient temperature
at the input terminals (i.e. your cold junction). You can get a feel for how
stable CJC temperatures are by doing this.
You should turn polling off while trying to calibrate the unit or change its
configuration.
Calibrat
ion of Input, Output, and Tref…
This section is used to calibrate the input, output, and cold junction
temperature reference of the unit. You can begin calibration of any of these
three stages by clicking the corresponding “Instructions” button and
following the on-screen prompts. Note that the button text will change
according to the step.
Each calibration is an interactive process in which the software prompts you
to apply input signals and then measure the corresponding output current.
First, it will prompt you to apply the zero-input signal, then measure and
record the corresponding zero output signal current. Second, it does the
same for the full-scale input signal and the corresponding full-scale output
current signal. Note that as the span is reduced, resolution also diminishes.
The Configuration Software will usually let you know when you need to
adjust your desired limits as you enter them.
CAUTION:
Input signal levels outside of the nominal input range of the unit
will not be accepted for configuration of zero or full-scale. Since not all input
levels can be validated during field programming, connecting or entering
incorrect signals will produce an undesired output response.
CONFIGURATION
STEP-BY-STEP
Reconfiguration
Zero & Full-Scale
Calibration