Assembling the stand, Maintenance and cleaning – IKA RH digital User Manual

Page 14

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Safety contact thermometers

acc. to DIN 12 878 class 2 or acc. Gerstel are connected with a three-
wire cable, the test current flows through the contact thermometer.

Safety function:
If the test current is interrupted because of breakage of contact ther-
mometer or unplugging of thermometer, the heating cuts off.

Contact thermometer without safety circuit

Acc. to DIN 12 878 class 0. The instrument only heats if the test
current circuit is closed by an electrical connection of the plug pins
3 and 5.

2-wire connecting cables:

Connect plug pins 3 and 5 of the instrument plug.
3-wire connecting cables:

The test current circuit can also be produced in the terminal head
of the contact thermometer (connect plug pins 2 and 3)-Safety
A 3-wire cable with the required bridge is an available accessory.

• Remove threaded plug (R)

• Remove the protective cap from the support rod
• Put the washer between housing and nut
• Screw the support rod onto the device by hand until the end stop is reached
• Use an A/f 17 wrench to tighten the nut
• Accessories should be attached using boss head clamps.

Assembling the stand


For bath attachments with diameters
greater than 180 mm, use the support
rod H 16 V with the extension H 16.1.

Maintenance and Cleaning

The device is maintenance-free. It is subject only to the natural
wear and tear of components and their statistical failure rate.

Disconnect main plug prior to cleaning!

Only use cleaning agents recommended by IKA



Contamination Cleaning agents

isopropyl alcohol

Building materials

water containing tenside/isopropyl alcohol


water containing tenside/isopropyl alcohol


water containing tenside


water containing tenside

- When cleaning, do not allow moisture to get into the unit.
- Wear the proper protective gloves during cleaning of the devices.
- Before performing a non-recommended method of cleaning or

decontamination, the user must ascertain with IKA


that this me-

thod will not destroy the instrument.

Spare parts order
When ordering spare parts, please give:
- Machine type
- Serial number, see type plate

- Software Version (second displayed segment when the device is on)
- Item and designation of the spare part please see
Please send instrument in for repair only after it has been

cleaned and is free from any materials which may consti-

tute a health hazard.

For this you should request the “Decontamination Clearance

Certificate” from IKA


, or use the download printout of it from

the IKA



Return the instrument in its original packaging. Storage packaging is
not sufficient. Also, please use suitable shipping package materials.

Information for Care and Maintenance of the HeatingPlate

with Technical Enamel Coating

The technical enamel makes the heating plate easier to care fort and
more resistant to acids and bases. Because of it, however, the
heating plate is also more susceptible to extreme fluctuations in
temperature and the force of impact. This can result in cracks
forming or the coating flaking off.
Make certain that the bottom of the placing vessel is even, clean
and dry. The bottom of the placing vessel must not have any sharp
grooves, sides or edges. Remove residues of bases and immedialety.
We recommend most strongly that you clean the
heating plate regularly.


For the detailed instructions for settings and limit values, please refer
to the operating instructions for the instrument you are connecting.

The desired average temperature can be adjusted on the

ETS-D or contact thermometer. In addition, a “MAXTEMP”

can be set for the ETS-D. A maximum average temperature

can be set on the ETS-D to avoid malfunctions in combina-

tion with the RH. The required surface temperature of the

heating plate can be selected with the temperature rotary

knob or button.

Adjusting the temperature of device to the maximum adjustable tem-
perature will result in the fastest possible heating time, but the average
temperature may fluctuate to values above the set-point temperature
on the contact thermometer. By adjusting the temperature rotary knob
or button to approximately twice the set-point value of contact thermo-
meter (with a set-point of 60°C, the temperature of device would be set
to 120°C), you will reach a good compromise between a fast heating
time and overshooting the set point.
If you adjust the temperature of device to exactly the set-point
temperature, the medium will not reach the set-point temperature
because some loss of the heat will always occur between the hea-
ting plate and the medium.
The maximum heating plate temperature can be adjusted

with the “Safe Temp” screw.

The stirring function will continue to run at the speed that was set
before the malfunction.
A 6-pin jack is located on the rear side of the instrument for connec-
ting the ETS-D, contact thermometer or contact plug. The electronics
of the instrument returns a test current which must flow through con-
nector pins 3 and 5 for the heating plate to heat up.

This manual is related to the following products: