DataLoop™ LI23 Loop-Powered Process Meter
Instruction Manual
38
MN302100 Rev 3
Setting Up the Input Signal (
INPUT
)
on page 19 for details about scaling the meter.
Calibrating the Input (
CAL
)
To scale the meter without a signal source, refer to
Setting Up the Input Signal
(
INPUT
)
, page 19.
The meter can be calibrated to display the process in engineering units by applying the appropriate input
signal and following the calibration procedure. The
CAL
menu should be used with a live signal coming
from a 4-20 mA transmitter connected to the process being measured.
During calibration, the mA input value will be displayed as
INP 1
and
INP 2
. Adjust the input source until
the desired mA value is shown. The use of a calibrated signal source is strongly recommended.
1. After accessing the
SCALE.CAL
menu, press the
Right-Arrow
button to scroll to the
Calibration
menu
(
CAL PV
) and press
Enter
.
2. Select the appropriate units for the desired process variable, then press
Enter
. For information on
units, see Available Unit Classes and Units on page 20.
3. The meter displays
INP 1
. Apply a known signal and press
Enter
. The display will flash while
accepting the signal.
4. After the signal is accepted, the meter displays
DSP 1
. Enter a corresponding display value for the
signal input, and press
Enter
to accept.
5. The meter displays
INP 2
. Apply a known signal and press
Enter
. The display will flash while
accepting the signal.
6. After the signal is accepted, the meter displays
DSP 2
. Enter a corresponding display value for the
signal input and press
Enter
to accept.
7. After completing calibration, the
SAVE?
display will need to be acknowledged using the
Enter
key
before calibration will take effect.
Low-Flow Cutoff (
CUTOFF
)
The low-flow cutoff feature allows the meter to be programmed so that the often-unsteady output from a
differential pressure transmitter at low flow rates always displays zero on the meter.
PV
SCALE.CAL
CAL
UNITS
UNITS
VOLUME
UNIT
GAL
DSP 1
GAL
Flashes
Units
SCALE
PV
CAL
PV
INP 1
04.000 mA
DSP 1
+00,000.00
DSP 2
GAL
Flashes
Units
INP 2
20.000 mA
DSP 2
+00,100.00
SAVE?
