Maintenance And Repair Of The Thermal Cycler Cleaning, Maintenance And Repair; Over Temperature Test; Temperature Check-Up; Calibration - VWR UNO Serie Bedienungsanleitung

7 MAINTENANCE AND REPAIR OF THE THERMAL CYCLER
7.1 Cleaning, maintenance and repair
For safety reasons the device must be switched off and the mains plug pulled out before cleaning is carried
out! The surface of the thermal cycler can be wiped off with a damp cloth or ethanol. Do not use aggressive or
scouring cleaners or organic solvents for cleaning. The device should be protected from aggressive
chemicals. Make sure that no liquid penetrates the interior of the device.
If sample liquids penetrate into the drill holes of the thermal cycler clean them immediately with mild soap
followed by distilled water. You can use mild disinfectants for decontamination.
Maintenance (over temperature test and temperature check up, see 8.2 and 8.3) should be carried out
regularly to detect possible technical failures.
The electric fuses are situated at the back of the device between the power switch and the mains plug. After
pulling out the mains plug and pushing the safety catch upwards the fuses can be changed. Use only fuses
with correct values (indications about the fuse type are situated at the back of the device).
The device should only be opened by a qualified specialist. Unauthorised work on the device voids the
warranty. All repairs should only be carried out by authorised persons using original replacement parts. The
replacement of single components of the device should not be done by the user but exclusively by authorised
specialists. Please therefore send the device back to the manufacturer. The surface of the device should be
decontaminated with a lint-free cloth soaked with 70% ethanol before sending. The drill holes of the thermo
block should be cleaned with a 1,5% hypochlorite solution with the help of a cotton bud. Please fill in and sign
the decontamination certificate and send it to the manufacturer together with the device.
7.2

Over temperature test

A periodical test of the over temperature protection ( System  Hardware  Thermo Block  Over
temperature test) is recommended.
7.3 Temperature check up
Maintenance of the temperature at regular intervals (e.g. annually) is recommended. The thermometer should
be equipped with wired sensing devices (e.g. PT1000) and should have an accuracy of 1/10 class B (∆T =
±0,03 °C) measurements in the range of 0 to +100 °C. While processing the temperature control room
temperature should not exceed +25 °C.
7.4

Calibration

If there is a reasonable suspicion that the device has deviated from its calibration range, because the
variations of the temperature check up are considerably out of the acceptable tolerance, a new calibration
must be carried out by the manufacturer. Please contact your local distributor.
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