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- Make sure when handling the thermometer that the measuring media are absolute-
ly dead! The utmost caution is advised when dealing with voltages that exceed 25
V AC or 35 V DC. Even at these voltages you may get an electric shock that is dan-
gerous to life if you touch the electrical conductors.
- Make sure before each measuring that neither your measuring instrument nor your
temperature sensors are damaged.
- Make absolutely sure that the voltage between measuring instrument and earth
does not exceed 24 VACrms or 60 VDC.
- Do not use the measuring instrument under unfavourable ambient conditions or in
rooms that contain or may contain combustible gases, fumes or dusts. Make sure
for your own safety that neither the measuring instrument nor the measuring leads
get damp or wet. Avoid operation in the immediate vicinity of
a) strong magnetic fields (loudspeakers, magnets)
b) electromagnetic fields (transformers, motors, coils, relays, contactors, electro-
magnets, etc.)
c) electrostatic fields (charges / discharges)
d) transmitting antennas or HF generators
- Do not use the digital thermometer just before, during or shortly after a thunder-
storm (lightning stroke! / high-energy over-voltages!). Ensure that your hands,
shoes, clothes, the floor, the measuring instrument and the measuring leads, cir-
cuits and circuit elements are absolutely dry.
- If there is reason to believe that safe operation has become impossible, put the
device out of operation and secure it against unintended operation.
Safe operation must be presumed to be no longer possible if
- the device exhibits visible damages
- the device does not function any more
- the device was stored under unfavourable conditions for a long period of time or
- the device was exposed to extraordinary stress caused by transport.
- Never turn-on the measuring instrument immediately after it has been brought
from a cold into a warm room. Under unfavourable conditions, the condensation
water that forms may destroy your device. Leave the device turned-off until it has
reached room temperature.
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Notes!
The temperature of T1 is displayed in the left upper display. In the right upper
display the temperature of T2 is displayed. Below them on the left and on the
right, the temperatures of the inputs T3 and T4 are displayed.
If one of the four temperature sensors is not connected or if it is interrupted,
the signs "- - - -" will be displayed instead of a measuring value. In this case the
difference will not be detected/displayed.
3. Now, when the two inputs T1 and T2 are occupied, it is possible to measure the
difference temperature. Actuate the button "T1 - T2". Now the temperature T1 is
displayed at the top on the left, T2 at the bottom on the left. "1 - 2" can be read at
the top on the right and the difference of T1 minus "-" T2 is displayed at the bot-
tom on the right.
Disposal
If the digital thermometer K204 does not function any longer or cannot be repaired any
more despite correct supply (9 Volt battery), ensure to dispose of the device accor-
ding to the relevant statutory requirements.
Correcting malfunctions
The digital thermometer K204 you have bought was constructed in keeping with the
present technological development. Nevertheless, there may arise problems or mal-
functions. For this reason, the following chapter will give you information on how to
correct some of these malfunctions rather easily.
Observe the safety instructions!
Error
Possible cause
No transmission to the PC
Safe contact of the connecting cable?
Software loaded according to the instructions?
PC interface all right?
No display at the
Is the battery discharged?
turned-on device
Did the measuring instrument turn-off automatically
after 30 minutes of non-use?
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