Intended Use; Safety Installation On The Device; Set-Up; Unpacking - Heidolph MR Hei-End Instruction Manual

The MR Hei-End is a safety magnetic stirrer with a heating function, suitable for non-
monitored operation. The Hei-End is a magnetic stirrer featuring a hotplate function. It is
designed for use in chemical and biological laboratories of industrial enterprises,
universities, schools and pharmacies.
The instrument is designed to heat substances to a specified temperature and/or mix them
through the action of a magnetically linked stirring rod in a vessel.
To ensure maximum service life, observe the specified ambient conditions (temperature
and humidity) and ensure that the instrument is not exposed to a corrosive atmosphere.
Function of the safety switching-off facility:
2 independent, temperature-measuring sensors are located in the hotplate. One serves
the processor-driven control of the hotplate. The other serves the analog safety circuit
switching off all the poles.
Criteria for the safety switching-off function (heating OFF):
The temperature set for the hotplate (reference value) is exceeded by the set safety
temperature (max. 25°C) (see chapter 9.2).
The measured temperature of the hotplate (actual value) is higher than 360°C
Sensor breakage or short circuit in the temperature sensor of the safety circuit
Sensor breakage or short circuit in the temperature sensor of the control circuit
The µ-controller is affected in the program sequence
Sensor breakage or short circuit in in saftey circuit of external temperaure sensor
Sensor breakage or short circuit in in control circuit of external temperaure sensor
1

Unpacking

Unpack the instrument with care. Inspect for damage and report such damage or missing
parts to your supplier right away.
2

Setting up the instrument

Place the instrument on a solid, horizontal surface. Keep the area around the instrument
clear of other items.

INTENDED USE

SAFETY INSTALLATION ON THE DEVICE

SET-UP

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