Fluke 1529 Technical Manual page 46

1529 Chub-E4 Thermometer Readout
Probe Menu
and hold the Exit button to cancel to the main display or press the EXIT button to
cancel and to move to the next parameter. On the last parameter, press the Exit button
to exit to the menu.
6.2.1.8 YSI-400 Conversion
The YSI-400 conversion type is for 2252W thermistors matching the characteristics of
the YSI-400 series of thermistors.
There are no user programmable coefficients associated with this conversion type. Use
the Enter button or Exit button to exit the menu.
6.2.1.9 Thermocouple Volts [Vin[mV]]
The thermocouple volts displays the measurement in volts rather than temperature.
Note: When selecting volts as the conversion type for thermocouples, no cold-junction
compensation is available. The value measured and displayed is the uncompensated
voltage as sensed at the input of the module.
There are no user programmable coefficients associated with this conversion type. Use
the Enter button or Exit button to exit to the menu.
6.2.1.10 Standard Thermocouple Conversions
Note: An Application Note for use of Tungsten-Rhenium and other thermocou-
ples is available at www.hartscientific.com.
Standard thermocouple conversions include types B, E, J, K, N, R, S, T, and Au-Pt.
Voltage is converted to temperature using standard reference functions. (For additional
information consult the publication NIST Monograph 175.)
You can specify internal or external reference junction compensation (RJC) with the
RJC parameter. (See Table on page .) With internal RJC, the temperature of the ther-
mocouple cold junction is measured automatically and used to calculate the absolute
temperature of the thermocouple. With external RJC, a reference junction at a known
fixed temperature is used and the value of this fixed temperature reference must be
entered in the RJT parameter and is used to calculate the absolute temperature of the
thermocouple.
Conversions for each of the thermocouple types accept functional calibration data.
This can be used to improve the measurement accuracy. The parameter, Tn, is the
temperature of the point in degrees Celsius. The parameter, ADJn, is the temperature
deviation from the reference function at the point in degrees Celsius. The temperature
measurement is adjusted by this amount when measuring at this temperature. A poly-
nomial interpolation function is used for measurements between calibration points. If
calibration data is not available or is not to be used, the ADJn parameters should all be
set to 0.0. This causes the temperature to be calculated according to the standard refer-
ence functions.
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