B&B Electronics DUALCON-3 - Datasheet - Manual (Page 13)

DUALCON-3 USERS GUIDE
5. CALIBRATING THE DUALCON
When the unit is shipped the DUALCON will be calibrated for the input and
output types and ranges noted on the side label. If this label is blank then the unit
will be calibrated for 4-20mA input and 2 x 4-20mA source outputs. If the unit is
re-ranged by the user it is necessary to re-calibrate the unit to obtain the maximum
accuracy. The calibration is achieved by using both switches on the front panel to
select the zero or span adjust mode and then using the switches as raise/lower
buttons to adjust the output to the value required.
The mode the unit is in is indicated by the colour of the LED’s for both channels:
Green - Normal Operation
Red - Span Adjust
Yellow - Zero Adjust
Setting of the zero and span points is non-interactive, so each point need only be
set once. A typical calibration sequence would be as follows:
LED CH1 LED CH2 Mode
Action
Green Green Normal
Apply full scale input.
Press and release both buttons together to
enter output 1 span mode
RED Green
Output 1
Span
Adjust
Press raise / lower buttons to adjust
output 1 value. Press and release both
buttons together to return to normal mode
Green Green Normal
Apply zero scale input
Press and release both buttons together to
enter output 1 zero mode
YELLOW Green
Output 1
Zero
Adjust
Press raise / lower buttons to adjust
output value. Press and release both
buttons together to return to normal mode
Green Green Normal
Apply full scale input.
Press and release both buttons together to
enter output 2 span mode
Green RED
Output 2
Span
Adjust
Press raise / lower buttons to adjust
output 2 value. Press and release both
buttons together to return to normal mode
Green Green Normal
Apply zero scale input
Press and release both buttons together to
enter output 2 zero mode
Green YELLOW
Output 2
Zero
Adjust
Press raise / lower buttons to adjust
output 2 value. Press and release both
buttons together to return to normal mode
Green Green Normal Use product
IIG-010901 Page
13