Honeywell UDC 3300 사용자 설명서

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UDC 3300 Controller Product Manual

235

The procedure for calibrating the Current Proportional Output is listed in
Table 8-2. Make sure LOCKOUT in the Tuning Set Up group is set to
NONE. See Section 3 – Configuration.

Enter Calibration Mode

until you see

CURRENT

Lower Display

CALIB

Upper Display

Calibrate 0 %

You will see:

Lower Display

Upper Display

ZERO VAL

a value between 1 and 2048

 or 

until the desired 0 % output is read on the milliammeter.
Use the values shown below depending on the action of
your valve.

0 mA

For 0 to 20 mA Direct Action*

20 mA

For 0 to 20 mA Reverse Action

4 mA

For 4 to 20 mA Direct Action

20 mA

For 4 to 20 mA Reverse Action

Calibrate 100 %

This stores the 0 % value and you will see:

Lower Display

Upper Display

SPAN VAL

a value between 1 and 2048

 or 

until the desired 100 % output is read on the milliammeter.
Use the values shown below depending on the action of
your valve.

20 mA

For 0 to 20 mA Direct Action

0 mA

For 0 to 20 mA Reverse Action*

20 mA

For 4 to 20 mA Direct Action

4 mA

For 4 to 20 mA Reverse Action

Exit the Calibration Mode

The controller will store the span value.

or

To exit the calibration mode.

*When attempting to achieve 0 mA, always adjust the output to about 0.5 mA, and slowly decrease until the
output just goes to zero. Further decrementing will not change the output current (since the circuit cannot
produce negative current) but will affect the accuracy of the output by creating a dead zone where no
current flows.