Rockwell Automation 937CU-AISTR-DC1 Strain Gauge Converter Installation Instructions - Manual (Page 18)

Bul. 937
C Strain Gauge Converter Installation Instructions
Excitation, Sensitivity, Cell rating
• For the values of these parameters, please refer to the technical data of the sensor.
• The supply voltage exists between terminals 3 and 4.
• When connecting several measuring cells in parallel, the supply voltage and sensitivity must be
transferred, the cell data are to be totalled. Only cells of the same design and with identical cell
data may be connected in parallel.
• For a resulting total sensor resistance of R < 100 Ω the supply voltage 5 V must not be selected.
The maximum permitted supply voltage is calculated as follows:
Supply voltage = 49 mA x total resistance of the measuring cells
• For th e Cell data parameter, the maximum cell load must be set in kg (even if a different unit has
been selected).
The cell data can be set up without a measuring cell being connected. The Strain Gauge
Converter can then be connected to the weighing cell and is basically ready for operation. The
voltage created by the weighing cell due to the load is converted linear into the corresponding
gross weight.
Please note that mechanical influences have not yet been taken into account (e. g. acting of forces on
the weighing cell other than perfectly vertically) so that the weighing device does not achieve its
optimum accuracy.
If you want to use the Strain Gauge Converter without calibration yet take into account
an existing empty weight (e. g. an empty tank or a weighing platform) when
measuring, do not use the function "Zero point" but the function "Tare".
To take into account mechanical influences a calibration of the fully installed weighing
device using defined loads is unavoidable.
Note
Note
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