Calibration - WAGO 750 Series Manual

68 Commissioning
Table 35: "Scaling" Menu Item
Parameter
Show values in
hexadecimal
[Area for displaying
errors]
Additional information on the user scaling
Detailed information about user scaling can be found in Section "Scaling
Measured Values!"
7.3.2.4

Calibration

The I/O module can be recalibrated to correct the effects of long-term drift or to
optimize accuracy in a thermally stable state. Each input and measuring range
can be calibrated independently.
The calibration is dependent on the voltage range that was previously set for the
respective input (see Section "Channel Setting").
Before calibration, please note the following information:
• For calibration, use a low-noise calibrator with a measurement accuracy that is
10 times higher than that of the device to be calibrated.
• Disconnect all cables (if there are any) from the I/O module to the system.
• Use a separate 24 V power supply for the node.
• Use short shielded cables to connect to the calibrator.
• Calibrate each input separately.
• For an optimal calibration process, the measuring bridge (or a comparable
resistor network) should remain connected directly to the I/O module.
The calibration voltages, on the other hand, can be fed in at the bridge.
Manual
Version 1.0.0
750-1491 2AI Resistor Bridge (Strain Gauge)
Setting Option / Description
The hexadecimal representation can be switched on or off.
Hexadecimal representation is enabled.

The values are displayed as fixed-point

numbers with unit.
Underflow Underflow of the measuring range
Overflow Overflow of the measuring range
Measuring The field-side input voltage or field-side
range input resistance is below the measurement
underflow range lower limit.
Measuring The field-side input voltage or field-side
range overflow input resistance is above the measurement
range upper limit.
Internal Error Internal error present (ADC error)
WAGO I/O System 750