I-7021/22/24, M-7022/24/28 User Manual, Rev: B2.3
31
I-7024/24R/M-7024/24R Current Output Calibration
(for firmware version A2.9 and earlier)
1.
Connect a current meter and an external power source
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 30, 0 ~ 20 mA. Refer to Section
2.1 for details.
4.
Send command to output 0 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 0 mA. Refer to
Section 2.11 for details of sending the trim command.
6.
Send the 0 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, 2 and 3.
Note:
The M-7024/24R must be switched to the DCON protocol mode
before calibrating. Refer to Sections 1.12.1 for details of the
switching protocol.
Summary of Contents for M-7024
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 ...
