Super Systems 20PQ Calibration Manual - Manual (Page 2)

2
Calibration procedure for MKP - PKP
INSTRUMENT CALIBRATION
PROCEDURES
1 GENERAL GUIDELINES FOR CALIBRATION
For an accurate calibration it is necessary to proceed as follows:
a) - The instrument under calibration should be mounted in its case in
order to keep the internal temperature stable.
b) - The ambient temperature should be stable.
Avoid any drift due to air-conditioning or others.
c) - The relative humidity should not exceed 70%.
d) - The instrument must be in ON condition from 20 minutes at least.
e) - Operate, possibly, in an environment with no electromagnetic
disturbances.
f) - During calibration, connect to the instrument one input at a time.
g) - Before to execute each calibration, be sure that the specific
hardware setting has been made (see "Preliminary hardware
setting" paragraph).
For this calibration procedure it is necessary to use calibrators with
the following accuracy and resolution:
ACCURACY
1) For current input: + 0.025% output + 0.0025% range + 0.01
µ A
2) For voltage input : + 0.005% output + 0.001% range + 5
µ
V
3) For TC input: + 0.005% output + 0.001% range + 5 µ V
4) For RTD input: + 0.02 % + 0.0025
Ω
/decade.
5) For cold junction compensation: better than 0.1 °C
RESOLUTION
1) For current input: 0.5
µ
A
2) For voltage input: 100
µ
V
3) For TC input: 1
µ
V
4) For RTD input: 10 m
Ω
5) For cold junction compensation: better than 0.1 °C
2 PRELIMINARY HARDWARE SETTINGS
2.1 HOW TO REMOVE THE INSTRUMENT
FROM ITS CASE
1) Switch off the instrument.
2) Push gently the lock A on the right.
3) While the lock A is maintained out, slide out the right side of the
instrument (see fig. 1).
Fig. 1
4) Push gently the lock C on the left.
5) While the lock C is maintained out, slide out the instrument
(see fig. 2).
Fig. 2
2.2 MAIN INPUT SELECTION
Set J103 (see fig. 3) according to the desired input type as shown in
the following table.
J103 INPUT TYPE
T/C, RTD,CJ 60 mV 5 V 10 V 20 mA
1-2 open open close open open
3-4 open open close close open
5-6 open open open open close
7-8 open open open open close
5-7 close close open close open
6-8 close close open open open
Fig. 3
2.3 AUXILIARY INPUT SELECTION (option)
Set J102 (see fig. 3) according to the desired input type as shown in
the following table.
J102 INPUT TYPE
5 V 10 V 20 mA
1-2 close open open
3-4 close close open
5-6 open open close
7-8 open open close
5-7 open close open
6-8 open open open
A
B
B
D
C
D
1 3 5 7
2 4 6 8
1 3 5 7
2 4 6 8
J102 J103
CPU
card
1 2 3 4
ON DIP
V301
J205