Model PD655 Large Display Process Meter
Instruction Manual
33
Select Calibration Method
For best results, allow the meter to warm up for at least 30 minutes.
The meter may be calibrated using an external signal source such as a calibrator
or scaled using the internal source with the
I-CAL
feature. With
I-CAL
, a 4-20
mA input can be scaled for any display range without applying a signal. To scale
inputs such as 0-5 V, 1-5 V, or 0-10 V without applying a signal, it is necessary to
first complete an Initial Calibration (see
Initial Calibration With External Source
(if Needed)
) below.
To select Calibration Method, apply power with
ACK
button pressed.
1. When display stops flashing, release
ACK
button. Display alternates
between
E-CAL
and
I-CAL
.
2. To calibrate meter with an external source, such as a calibrator, press
ENTER
when
E-CAL
appears.
To scale meter with internal source, press
ENTER
when
I-CAL
appears.
Initial Calibration With External Source (if Needed)
For best results, allow the meter to warm up for at least 30 minutes. Initial
calibration is required only when the
I-CAL
feature is to be used with an input
other than the default 4-20 mA range or it is time for recalibration.
1. Make sure the jumper on JP1, is set for the desired input (see Figure 17,
page32).
2. Apply
power
with
ENTER
and
ACK
buttons pressed. Release when display
stops flashing.
3. The meter scrolls through the choices
sel 20, sel 5
, and
sel 10,
which
correspond to select input signals of 4-20 mA, 0-5 V or 1-5 V, and 0-10 V.
Press
ENTER
when desired value appears.
4. The meter flashes
InPt 1
. Apply low-end signal, (4 mA or 0 V), press
ENTER
.
(For 1-5 V input signals calibrate meter with input 1 = 0 V, input 2 = 5 V.)
5. The meter flashes
InPt 2
. Apply high-end signal (20 mA, 5 V, 10 V), press
ENTER
.
6. This completes the Initial Calibration and initializes input 1 and input 2
scaling points to 4.000 & 20.000 mA, 0.000 & 5.000 V, or 0.000 & 10.000 V.
