Loop Leader PD6620 Series Loop-Powered Rate/Totalizer Instruction Manual
41
Advanced Scaling and Calibration (
SCALE.CAL
)
This menu offers options to scale or calibrate the meter.
Scaling the Input (
SCALE
)
The scale menu in the
Advanced
menu is the same as the scale menu in the
Input
menu. See Setting Up
the Input Signal (
INPUT
) on page 24 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 24.
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 un-
til 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 RATE
) 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 25.
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.
RATE
SCALE.CAL
CAL
UNITS
TIME
/SECOND
UNIT
GAL/S
DSP 1
GAL/S
Flashes
Units
SCALE
RATE
CAL
RATE
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?
