Meatest M133C, Operation Manual

Page: 62 / 148

MEATEST
M133C Electric Power/Energy Calibrator
Operation manual
62
9 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 terminals (GndU On, GndI On).

Do not overload the power stages by leaving the calibrator switched on with the load
connected for a long time, especially on 30 A current range and 140 V and 280 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 600 V AC and the maximum output current can reach 30 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.