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Model PD690 Universal Process Meter Instruction Manual
21
Select Calibration Method
The meter may be calibrated using an external signal source such as a
calibrator (E-[AL), or scaled using the internal source (I-[AL). With
I-[AL, 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) on page 20.
Scale or Calibrate the Meter
To select a Calibration Method, apply power with ACK button pressed
.
1. When display stops flashing, release ACK button. Display
alternates between E-[AL and I-[AL.
2. To calibrate meter with an external source, such as a calibrator,
press ENTER when E-[AL appears.
3. To scale meter with internal source, press ENTER when I-[AL
appears.
Select Decimal Point (dE[Pt)
To program the decimal point or light up the extra "0", push ENTER.
The meter displays S[ALe or [alib, then dE[Pt. Push ENTER when
dE[Pt appears. The meter then reads 199990 with the decimal point
changing locations and the extra "0" illuminating. Push ENTER when
the decimal point is in the desired position; or if the extra "0" is
desired; when the extra "0" is displayed.
Select Linear Input (L or S)
The meter can be programmed to either process the input signal in a
linear fashion (L) or to take the square root of it (S). To program the
meter for a linear input, push ENTER. When (L or S) appears, push
ENTER again. The meter will flash (L or S) alternately. Press ENTER
when (L) is flashing. After (L) is selected the meter will switch to indi-
cation mode and is ready to be calibrated.
Select Number of Calibration Points (no. PtS )
The user may input up to 11 calibration points and corresponding
displays to provide custom linearization. To program the number of
calibration points, push ENTER, when (no. PtS) appears, push ENTER
again. The meter displays a number from 2 to 11 that represents the
number of calibration points. Push ENTER when the number equals
the desired number of calibration points. As soon as the number of
points is programmed, the meter flashes InPt 1 (Indicating it is ready
to be calibrated). Refer to Scale Using Internal Calibration (I-[al),
page 22 or Calibrate Using an External Calibrator
(e-[al) on page 23.
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