PD6701 Field-Mount Loop-Powered Feet & Inches Level Meter
Instruction Manual
13
Scaling the Meter (
SCaLe
)
The 4-20 mA input can be scaled to display the
process in engineering units. To scale the meter,
enter the value in milliamps (mA) for input 1, and then
the corresponding engineering units display value. Do
the same for input 2.
After entering the display 2 value, confirm the new
scale by pressing
ENTER
at the
Save
menu.
A signal source is not needed to scale the meter;
simply program the inputs and corresponding display
values.
For instructions on using multipoint scaling, see
Input Multipoint Linearization
For instructions on how to program numeric values
see
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.
Selecting Inch Fraction Display
Mode (
FRACTN
)
The display may be programmed to display fractions
of an in 1/8
th
or 1/16
th
increments, or to show no
fraction.
Scaling the Tank Level Indicator
(
PERCENT
)
The display includes a 20-segment tank height
indicator. This menu sets full and empty values, in
feet and inches, for the tank height 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 250 feet, the tank height indicator
may be set for 100 feet, 0 inches. At 100 feet 0 inches
on the display, the tank height indicator will show as
full, even though the input is not 20 mA.
