Econox CarboProbe CP Plus Petunjuk Penggunaan Manual - Halaman 7

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There is no cold junction ambient temperature compensation in the meter, so the reading

must be corrected for room temperature. This can be approximated by measuring room

temperature separately then adding the thermocouple voltage corresponding to the room

temperature.

Example, for an R-type thermocouple:

Ambient temperature is 25°C and meter indicates probe thermocouple signal 8.5 mV

Thermocouple chart (see section 4) shows 25°C corresponds to 0.14 mV

8.5 mV + 0.14 mV = 8.64 mV, which corresponds to 856°C from chart

Hence probe temperature = 856°C

Thermocouple test

Prolonged exposure (hundreds of hours) to high temperature (over 1500°C) causes

evaporation of platinum. The thermocouple can be tested for open circuit or thinning that

may lead to failure.

Swap the positions of the yellow and green wires in the meter. Select "TEST" position. The

reading should be less than 0.005. A reading of 1 indicates that the thermocouple is either

broken or may soon do so. This test should be done at room temperature.

3. Repairing the sensor

CarboProbe sensors are highly technical measuring instruments subjected to potentially

difficult work conditions. The lifespan of a given sensor depends, to a large extent, on the

conditions in which it is used.

When sending a sensor for repair, pack it carefully in its original packaging, mark it "Fragile

Instrument", and return it to:

X:\Fiches tech. - Normalisation\ECONOX\Normalisation\Mode d'emploi\PDF\sonde

ECONOX USA

600 Mogadore Road

Kent, Ohio 44240

T: +1 330-678-3889

www.econox.us

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