ICP DAS USA I-7021 User Manual

Also see for M-7024: Quick start guide

Contents

ICP DAS USA I-7021 User Manual Manual pdf 27 page image

I-7021/22/24, M-7022/24/28 User Manual, Rev: B2.3 271.10 CalibrationWarning: It is not recommended that calibration beperformed until the process is fully understood.I-7021/21P Current Output Calibration1. Set the jumper JP1 to select internal power and connecta current meter to the current output terminal of themodule. If there is no current meter then you can use avoltage meter with a shunt resistor of 250 ohm and0.1%. The current (I) can be calculated using theequation, 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 Section2.1 for details.4. Send command to output 4 mA. Refer to Section. 2.2for details.5. Repeat to send the trim command and check the meteruntil the meter’s reading is nearest to 4 mA. Refer toSection 2.10 for details of sending the trim command.6. Send the 4 mA calibration command. Refer to Section2.5 for details.7. Send command to output 20 mA. Refer to Section. 2.2for details.8. Repeat to send the trim command and check the meteruntil the meter’s reading is nearest to 20 mA. Refer toSection 2.10 for details of sending the trim command.9. Send the 20 mA calibration command. Refer toSections 2.7 for details.