Metrohm 900 Touch Control Manual - Manual (Page 105)

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11 Device manager
900 Touch Control
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In this dialog, you define the type of temperature sensor you have con-
nected to the selected measuring input.
ADC type
Type of analog-digital converter.
Serial number
Serial number of the measuring interface.
Thick film type
Type of the thick film.
Temperature sensor
Type
The instrument supports the use of two different temperature measure-
ment techniques:
￭ NTC (Negative Temperature Coefficient)
￭ Pt1000 (Platinum resistance)
Select here the type that has been connected to the instrument. If an NTC
sensor is used, then it is also necessary to enter two sensor characteristics.
These characteristics are listed in the specifications of the sensor.
Selection Pt1000 | NTC
Default value Pt1000
R (25 °C)
This parameter can only be edited with Type = NTC.
Nominal resistance of the NTC sensor at 25 °C.
Input range 1000 - 99999 ohm
Default value 30000 ohm
The default value applies to Metrohm sensors with
an NTC sensor.
B value
This parameter can only be edited with Type = NTC.
Material constant of the NTC sensor. B values of NTC sensors are fre-
quently based on different reference temperatures (usually 25 °C and
50…100 °C). When entering the B value the influence of the second ref-
erence temperature is negligible in comparison with the measuring accu-
racy of an NTC sensor.