I-7021/22/24, M-7022/24/28 User Manual, Rev: B2.3
29
I-7022/M-7022 Current Output Calibration
1.
Set the jumper JP1 to select internal power and connect
a current meter to the current output channel 0 terminal
of the module. If there is no current meter then you
can use a voltage meter with a shunt resistor of 250
ohm and 0.1%. The current (I) can be calculated using
the equation, I = V (voltage) / 250.
2.
Warm up the module for at least 30 minutes.
3.
Set the type code to 0, 0 ~ 20 mA. Refer to Section
2.24 for details.
4.
Send command to output 4 mA. Refer to Section. 2.4
for details.
5.
Repeat to send the trim command and check the meter
until the meter’s reading is nearest to 4 mA. Refer to
Section 2.11 for details of sending the trim command.
6.
Send the 4 mA calibration command. Refer to Section
2.6 for details.
7.
Send command to output 20 mA. Refer to Section. 2.4
for details.
8.
Repeat to send the trim command and check the meter
until the meter’s reading is nearest to 20 mA. Refer to
Section 2.11 for details of sending the trim command.
9.
Send the 20 mA calibration command. Refer to
Sections 2.8 for details.
10.
Repeat steps 1 to 9 for channel 1.
Note:
The M-7022 must be switched to the DCON protocol mode
before calibrating. Refer to Sections 1.12.1 and 3.3.4 for details
of the switching protocol.
Summary of Contents for I-7021
Page 9: ...I 7021 22 24 M 7022 24 28 User Manual Rev B2 3 9 1 2 Terminal Assignment 7021 7021P 7022 ...
Page 10: ...I 7021 22 24 M 7022 24 28 User Manual Rev B2 3 10 7024 7024L 7024R ...
Page 11: ...I 7021 22 24 M 7022 24 28 User Manual Rev B2 3 11 7024U 7028 ...
Page 46: ...I 7021 22 24 M 7022 24 28 User Manual Rev B2 3 46 1 13 3 Wall Mounting ...
