5. User Calibration Function
To make sure that the CA0 is highly accurate, we recommend that you calibrate it regularly.
You can use the user calibration function to perform calibration.
CAUTION
To avoid electrical shock:
• Make sure that specialized technicians calibrate the instrument using the proper
equipment.
• To connect the CA0 to a signal generator (reference device), use the test leads and
lead cables that come with the reference device.
• Be sure to read the reference device’s instruction manual before you calibrate the
CA0.
• When you switch measurement modes during calibration, be sure to remove the test
leads and lead cables first, and then change the mode and terminal locations.
Calibration Conditions
Reference device:
Use a reference device that fully satisfies the accuracy of the CA450.
DC voltage and current generator or digital multimeter (DMM)
Environment:
Temperature: 23 ± 5°C, Humidity: 45 to 75% RH (no condensation)
Before you perform calibration, leave the CA0 in the environment
described above for 0 minutes or more.
5.1 Calibrating Measurements
Subdisplay
Calibration point
Main display
Measured value
Calibration mode
Perform calibration according to table 1.
) While holding down the SELECT and RANGE keys, turn the function switch from the
OFF position to the ACV position. The CA0 will start in “calibration mode.” (The
“CAL” segment will be visible.)
If the CA0 is in sleep mode, hold down the SELECT, RANGE, and LIGHT keys for 2
seconds or longer to start the CA0 in calibration mode.
2) Use the test leads to connect the CA0 to the reference device.
) From the reference device, apply the values in Table .
The calibration point appears in the subdisplay.
