Heidolph EKT Hei-Con G - Manual (Page 25)

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4.6 Display of the controller status
If the reference value is higher than the actual value the heating is switched on. In the top
left-hand corner of the display a small rectangle travels from left to right (symbol for
heating). As soon as the FUZZY logic is activated and switches the heating off in advance,
the symbol goes out.
Modern magnetic stirrers have their own controlling function for the surface temperature of
the hotplate. This internal control of the magnetic stirrers always has priority.
4.7 Safety function "NO SENSR"
If the temperature sensor is not immersed in the medium, the safety shutdown is activated
after 3 mins and the heater on the magnetic stirrer is turned off . "NO SENSR" is shown on
the EKT display.
If the message "NO SENSR" appears with the temperature sensor immersed in the
medium, see "Troubleshooting" on page 26.
4.8 Monitoring the measuring range
When the temperature of the measuring range is exceeded (+300 °C
), “HI” appears on the
display; if the temperature is below the measuring range (-50 °C ) “Lo” appears on the
display.
4.9 Monitoring the sensor
If the sensor function is interrupted, “HI” appears on the display; if there is a sensor short
circuit, “Lo” appears on the display.
CLEANING AND MAINTENANCE
The housing and surface of the instrument can be cleaned by wiping with a moist cloth
(e.g. mild soap solution).
Note
Do not use chlorine bleach or other chlorine-based cleaning products,
abrasive cleanser, ammonia, steel wool or cleaning products with
metallic components under any circumstances. These will damage the
finish of the instrument.
The instrument is maintenance-free. Should repairs become necessary, please contact
an authorised Heidolph Instruments repair technician. Please contact your Heidolph
Instruments dealer or a Heidolph Instruments representation for more information (see
page 30).