CONTREX CX-1200 User Manual
Page 313
8 - 16
Analog Input 1 (voltage):
1.
Connect the Analog Output voltage pins to the Analog Input 1 voltage pins - pin 10 to pin 2,
pin 11 to pin 4. Connect a voltmeter between pins 2 and 4 with the positive lead on pin 2 (pin
4 is at common).
2.
Set AO Mode (CP-291) to “Volts” (1).
3.
Set AI1 Mode (CP-280) to “Volts” (1).
4.
Set Analog Cal Sel (CP-461) to “AI1” (1) to Select AI1 for calibration.
5.
Set Analog Cal Ref (CP-462) to “A” (1) to select point A.
NOTE: The old calibration data will be overwritten.
6.
Set Analog Cal EN (CP-460) to “On” (1) to start calibration.
7.
Adjust AO Bit Set (CP-464) until the meter reads the voltage that you want set for point A.
This is generally your smallest (or negative) voltage point. A -12 volts requires about -29500
bits, -10 volts about -24500 bits, 0 volts about 0 bits. For -12 volts, start with about -29400
and use the incremental scroll key.
8.
Enter the exact voltage measured by the meter into AnalogRef Val (CP-463).
9.
Set Analog Cal Ref (CP-462) to “B” (2) to select point B.
10.
Adjust AO Bit Set (CP-464) until the meter reads the voltage that you want use for point B.
This is generally your largest (or positive) voltage point. A +12 volts requires about 30100
bits, 10 volts about 25100 bits, 0 volts about 0 bits. For 12 volts, start with about 30000 and
use the incremental scroll key.
11.
Enter the exact voltage measured by the meter into AnalogRef Val (CP-463).
12.
Set Analog Cal EN (CP-460) to “Off” (0) to disable further calibration.