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• Calibration
General
All instruments are fully calibrated before leaving the factory and should
not need adjustment until the next scheduled calibration. However, if
you change the voltage attenuator switches, you must recalibrate the
voltage input.
Equipment requirements
• Suitable accurate signal source for the inputs
(see calibration points table below)
• An accurate digital multimeter (accurate to 0.05 mV and ±0.1 μA)
• A suitable regulated power supply, RPS/20 V AC/2 V DC/X
• CBX100 connected to a PC with the Setup/Calibration software.
Digital multimeters are frequently better at measuring voltages than
currents, so you may wish measure the voltage across an accurate
standard resistor (say 10 Ω ±0.05 %) when monitoring the output
current.
If you have a Portacal 1000 calibrator you will not need the multimeter
or the regulated power supply.
Connections
Connect the output circuit as shown on page one with the multimeter
in place of the receiving device.
Connect the ITXPlus up to a PC running the setup/Calibration software
(as if you were going to change the setup).
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