27
5.10.1.1 Changing Analog Channel Scaling References
Fig. 5.20.
Reference 1 and Reference 2 correspond to the calibration reference points of your analog device
Follow these steps to change the scaling reference of your analog channels:
1. From the Editor Mode, select the Analogs tab.
2. Enter a description for each analog channel being utilized.
Note:
the analog channel is inactive unless a description is defined.
3. Click on the Change button to configure the reference units and the actual units for that Analog channel.
4. Set Reference 1 (VDC) to the minimum output (in volts DC) of the analog device being configured.
5. In the Reference 1 Display box, enter the value to be displayed as the scaled value.
6. In the Reference 1 Units box, enter an abbreviation for the actual units (e.g. RH for relative humidity, F for
Fahrenheit, etc).
7. Set Reference 2 (VDC) to the maximum output (in volts DC) of the analog device being configured.
8. In the Reference 2 Display box, enter the value to be displayed as the scaled value.
9. In the Reference 2 Units box, enter an abbreviation for the actual units (e.g. RH for relative humidity, F for
Fahrenheit, etc).
10. Follow these steps for each Analog Channel being configured.
If the input voltage is 0-5 V, the input will read in increments of .0015 V.
– 4
90
0
5
°C
Display Units
(scaled vaules)
Actual Units (VDC)
Reference 1
Reference 2
Actual
Minimum
output value
VDC
Display
Minimum
output value
VDC
Units
(Display)
Actual
Maximum
output value
VDC
Display
Maximum
output value
VDC
Units
(Display)
0 -4
°C
5 90
°C
Fig. 5.21.
Example graph of Reference 1 and Reference 2 scaling values
