Grundig GD-HW-BPBB0550G, Руководство пользователя

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4.3 Maintenance
The black body should be managed and maintained by professional
person and maintenance and usage should be recorded.
DO NOT use the device in an environment with oil or chemical air.
To ensure the temperature accuracy, place the device firmly in the
environment with stable temperature. The recommended using
environment temperature is 10 °C to 25 °C (50 °F to 77 °F)
Power off the device before mounting or removing it.
Clean the surface of device with a neutral detergent. Clean the dust
on the black body with a soft brush.
Store the device in the packing box after use to prevent dust. Make
sure the environment temperature is suitable.
DO NOT dismantle the device without authorization. Contact the
professional specialist for repairing.
To ensure the temperature accuracy, it is recommended to calibrate
the black body once a year. Please send the device to qualified
calibration institute.