DPM-500 Analog Input Meter Instruction Manual
23
Scaling the Meter (
SCALE
)
The process input (4-20 mA,
10 VDC) can be scaled to display the process variable in engineering units.
A signal source is not needed to scale the meter; simply program the inputs and corresponding display
values.
Dual-Scale for Level Application
The analog input can be displayed in two different scales, by enabling the dual-scale feature (
d-SCAL
) in
the
Setup-Input
menu, see page 20.
To enable the dual-scale feature for some level applications you must select d-SCAL in the Input
selection menu.
Scaling the Input for PV1 (
SCAL 1
)
Scaling the Input for PV2 (
SCAL 2
)
Error Message (
Error
)
An error message indicates that the calibration or scaling process was not successful.
After the error message is displayed, the meter reverts to the input prior to the failure during calibration or
scaling and to input 1 during internal calibration, allowing the appropriate input signal to be applied or
programmed.
The error message might be caused by any of the following conditions:
1. Input signal is not connected to the proper terminals or it is connected backwards.
2. Wrong signal selection in
Setup
menu.
3. Minimum input span requirements not maintained.
4. Input 1 signal inadvertently applied to calibrate input 2.
Minimum Input Span
The minimum input span is the minimum difference between
input 1 and input 2 signals required to complete the calibration
or scaling of the meter.
For instructions on how to
program numeric values see
Input Range
Input 1 & Input 2 Span
4-20 mA
0.15 mA
10 VDC
0.01 VDC
