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11.- ADJUSTMENT AND CALIBRATION PROCEDURE
11.1.- RTD MODELS
A decade box or RTD simulator is required.
1.- Check that the instrument is not powered.
2.- Connect the RTD simulator or decade box to the signal input connector (See paragraph 8.3).
3.- Remove the rear cover taking off all the screws to obtain access to the control board.
(See page 7 paragraph 7).
4.- Power up the instrument with the appropriate power supply and wait until 3 minutes before to
start the adjust.
5.- Adjust the RTD simulator to generate the low signal indicated in TABLE-A.
6.- Display must shows the DISPLAY value indicated in TABLE-A, if not turn the trimmer PT1 located
on the Signal Conditioner (See paragraph 10.1) until display shows the DISPLAY value.
7.- Adjust the RTD simulator to generate the high signal, see TABLE-B.
8.- Display must shows the DISPLAY value indicated in TABLE-B, if not turn the trimmer PT2 located
on the Signal Conditioner (See paragraph 10.1) until display shows the DISPLAY value.
9.- Repeat steps 5 to 8 until the two values are correct.
10.- Check that the linearity remains correct, testing some other points of the range.
11.2.- THERMOCOUPLE MODELS
A Thermocouple simulator with Cold Junction compensation is required.
1.- Check that the instrument is not powered.
2.- Connect the Thermocouple simulator to the signal input connector (See paragraph 8.4).
3.- Remove the rear cover taking off all the screws to obtain access to the control board.
(See page 7 paragraph 7).
4.- Power up the instrument with the appropriate power supply and wait until 3 minutes before to
start the adjust.
5.- Adjust the Thermocouple simulator to generate the low signal indicated in TABLE-A.
6.- Display must shows the DISPLAY value indicated in TABLE-A, if not turn the trimmer PT1located
on the Signal Conditioner (See paragraph 10.2) until display shows te correct value.
7.- Adjust the Thermocouple simulator to generate the high signal indicated in TABLE-B.
8.- Display must shows the DISPLAY value, if not turn the trimmer PT2 located on the Signal
Conditioner (See paragraph 10.2) until obtain the DISPLAY value.
9.- Repeat steps 5 to 8 until the low and the high signals are correct.
10.- Check that the linearity remains correct, testing some other points of the range.
TABLE - A
TABLE - B
MODEL
LOW SIGNAL
DISPLAY
MODEL
HIGH SIGNAL
DISPLAY
M1
0°C
000.0
M1
600°C
600.0
M2
0°F
0000
M2
500°F
0500
M3
0°F
000.0
M3
200°F
200.0
J1
0°C
0000
J1
600°C
0600
J2
32°F
0032
J2
1000°F
1000
K1
0°C
0000
K1
1200°C
1200
K2
32°F
0032
K2
2000°F
2000
T1
0°C
0000
T1
400°C
0400
T2
0°F
0000
T2
400°F
0400
E1
0°C
0000
E1
600°C
0600
E2
32°F
0032
E2
1200°F
1200
R1
300°C
0300
R1
1700°C
1700
R2
32°F
0032
R2
3100°F
3100
S1
200°C
0200
S1
1700°C
1700
S2
32°F
0032
S2
3100°F
3100
L1
0°C
0000
L1
600°C
0600
