Function Heating; Limiter Of Safety Temperature - IKA RH basic 2 Betriebsanleitung

on the "Mot" dial (B) with a scale from 0 to 6 (C).
The scale values from 0 to 6 on this dial correspond roughly to speeds ranging
from 0 to 2000 rpm. The maximum speed of 2000 rpm is reached when the dial
switch is turned all the way to the right and there is no load on the motor.
Version RH digital KT/C: Set the motor speed using the "Mot" knob (B); the knob
has a graduated scale from 0 to maximum rpm.
The motor speed is shown on the LED display (D). When the motor is stopped
the speed "0" will be displayed. When the motor is operating, the display will
show the current speed in the range 100 to 2000 rpm.

Function Heating

The temperature of the heating plate of the instrument is kept constant by
a control circuit. In addition, it is monitored by a safety circuit. The required
temperature sensor (a thermo-couple) is installed in the heating plate. The RH
basic unit has a stainless steel surface plate with a heating output of 400 Watt.
RH basic KT/C and RH digital KT/C units have a enamel-coated stainless steel
surface plate with a heating output of 500 Watt.
Version RH basic and RH basic KT/C: The temperature of the heating plate can
be adjusted on the „Temp" turn dial (E) with a corresponding scale from 0 to 6
(F). The scale values from 0 to 6 correspond approximately to area temperatures
up to a max. of 320 °C. When the setting is at 0, the device does not heat the
medium up at normal room temperature.
During the heating phase, the signal light (I) lights up orange (orange = power is
being supplied to the heating plate; signal light off = no power being supplied)
Version RH digital KT/C: The temperature of the heating plate can be adjusted
on the „Temp" turn dial. When you change the knob setting, the LED display (G)
will the show the SETPOINT temperature and the warning light (K) will light up.
After approx. 3 seconds the LED display will switch back to showing the ACTUAL
14
temperature and the warning light (K) will switch off.
The temperature indication now constantly changes between actual temperature
(25 sec) and target temperature (5 sec).
When you select the SETPOINT temperature and as the unit heats up, the
warning light (K) will remain off and the LED display (G) will show the ACTUAL
temperature of the surface plate in the range from 0°C to +320°C.
The red warning light (J) will light up while heating is in progress. (Red warning
light ON = surface plate heating power supply is ON; red warning light OFF =
surface plate heating power is OFF).
PLEASE NOTE!
The heating plate of the version
RH basic KT/C and RH digital
KT/C only heats up, if the contact plug
has been plugged (the contact plug is
undetachably fitted to the instrument), or
if an ETC 1 and/or a contact thermometer
has been connected.

Limiter of safety temperature

The safety temperature limiter makes it possible to adjust the maximum
temperature of the heating plate (safety temperature).
This ensures that the temperature of heating plate does not exceed the flame
point of the material. The value to be set must be determined by trial and error
and should generally fall about 20 K below the flame point of the medium.
RH basic 2 devices have a safety circuit with a fixed setting that limits the
temperature of a heating plate to 400 °C.
RH basic KT/C and RH digital KT/C devices have an adjustable safety circuit. The
maximum temperature of the heating plate can be adjusted within a range from
100 °C to max. 400 °C.