H56.0.02.6C-01
Operating Manual GTH 1150
Page 6 von 10
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4
Adjustment
The device is calibrated and adjusted at the factory so that any standard probe offered by Greisinger can be
plugged in without recalibration. If the value deviates excessively over time, we offer factory re-calibration.
4.1 Manual Adjustment
Manual adjustment changes the factory settings, which can no longer be simply restored!
If you want to adjust the device to the available probe, the probe must be plugged in first. Then the zero-
point potential must be adjusted. See chapter
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Ensure that the thermometer has adjusted to room temperature for the zero-point
potentiometer adjustment!
4.1.1 Zero point-Adjustment
Put ice cubes in a glass and pour cold water until ice cubes are almost covered. Put sensor into glass, wait
approx. 30 minutes, then stir water with a spoon handle. Wait for stable value to be displayed, and then turn
zero point potentiometer by means of a screwdriver until display shows
0.
4.1.2 Scale Adjustment
An additional temperature reference is required for the scale adjustment. Adjust the display with the gradient
potentiometer (scale) to the desired reference value.
5 Basics of the measurement
5.1 Probe accuracy/device accuracy
DIN EN 60584-2
Class
Type
Deviation
Validity
1
K
+/- 1.5 °C
-
40… +375 °C
5.2 Possible errors
5.2.1 Immersion depth
For measurements in liquids the probe should be immersed sufficiently deep (depending on probe
diameter, at least 20 mm with Ø 3 mm and 10 mm with Ø 1.5 mm) and subsequently stirred.
When measuring gases the probe should also emerge as deep as possible in the gas to be
measured (e.g. when measuring in channels/pipes) and the gas should flow around the probe at
sufficient flow.
5.2.2 Surface effects and bad heat transfer
For surface temperature measurements special surface probes are necessary. Surface quality, heat
transfer and ambient temperature have an influence on the measurement result.
Thermally conductive paste between the probe and surface can also increase
measurement accuracy in some cases.
5.2.3 Cooling (evaporation)
For air temperature measurements, the probe should be dry, otherwise it can be possible that a too
low temperature could be measured.
5.2.4 Response time
Before reading the measured value at the measuring process, it is necessary to wait a sufficient time
(see chapter 6 Type K-sensor).
