Precision Digital PD6800 - Manual (Page 25)

PD6800-0L1 Loop-Powered Process Meter Instruction Manual
25
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. The minimum
span is 0.10 mA.
Scale Error Message (SPN ERR)
If the minimum span is not maintained, the meter will show a span error (SPN ERR)
and revert to input 2, allowing the appropriate input signals to be applied.
Scaling the Tank Level Indicator (PERCENT)
The display includes a 20-segment tank level indicator. This menu sets full and
empty values, in engineering units, for the tank level indicator.
This value may differ from the 20 mA full-scale and 4 mA empty-scale values
programmed in the Scale menu. This is ideal for level transmitters that output less
than 20 mA at the maximum height of the tank or pit or more than 4 mA at the
minimum height.
As an example, when using a level transmitter that outputs 20 mA at 25 meters, the
tank height indicator may be set for a maximum of 10 meters. When the meter
reaches 10 meters on the display, the tank height indicator will show full, even though
the input is not 20 mA.
set up -010.0
0300.0