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Calibrator's maintenance
The multifunction calibrator is electronic instrument with microprocessor control. All blocks which are heavily
loaded during the operation are cooled by a fan.
Rules for correct operation
Especially the following rules should be adhered to guarantee correct operation of the calibrator:
• The calibrator can only be switched on and off by pressing the mains switch located at the rear panel.
• Do not connect the calibrator to other voltage than set by the voltage selector.
• Do not block the vent openings located at the rear panel and bottom panel.
• The calibrator must not be operated in dusty environment. It was designed to be used in a laboratory.
• No liquid or small objects can be permitted to enter the calibrator through the vent openings..
• Do not switch the calibrator outside its operating temperature range.
• Connect the instruments to be calibrated to proper output terminals. There is no way of protecting the
calibrator from the damage caused by some improper connections.
• Do not damage the output terminals by plugging in "bananas" thicker than the terminals were designed
for.
• Whenever possible, use the setup menu to ground Lo output terminal (GND U ON setup function).
• Do not overload the power stages by leaving the calibrator switched on with the load connected for a long
time, especially on 20 A current range and 200V and 1000 V voltage ranges.
• If the instruments to be calibrated are not connected to calibrator's output terminals using original cables,
ensure that cables suitable for the calibration voltage and current are used. Maximum output voltage can
reach 1000 V AC and the maximum output current can reach 20 A AC.
Regular maintenance
The calibrator does not require any special maintenance of electrical or mechanical parts. If is gets dirty, the case
and the display can be cleaned by a wool rag moistened with alcohol.
The calibrator should be calibrated in the recommended 12-month intervals. A calibration center should perform
the calibration.
What to do in case of failure
If an obvious failure occurs during the operation (e.g. the display is not lit, the fan is not turning), the calibrator
must be switched off immediately. First, check the fuse located in the power cord receptacle. Procedure is
following:
•
Remove the end of power cord from the mains connector at the rear panel.
•
Insert the blade of a flat screwdriver into the opening cut in the mains voltage selector and pry out the fuse
holder.
Manuel de l'utilisateur
Calibrateur multifonctions CX 1651
147
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