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When the Thermistor T(R) conversion type is selected, the coefficients are dis
-
played on the right portion of the bottom of the display. Use the UD buttons
to scroll through the coefficients. Use the Enter button to edit and save the
new setting. Press 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.
7.2.1.7 Thermistor R(T) Conversion [THERM-R]
The following Steinhart-Hart equation is used for the thermistor R(T)
conversion:
rT K B BT BT BT( [ ]) exp[ ]= +++
−−−
01
1
2
2
3
3
The user-defined parameters for the thermistor R(T) conversion are B0 (B
0
)
through B3 (B
3
) as shown on a typical Hart Scientific thermistor calibration re
-
port. If B
2
is not used, as is the case with some calibrations, B2 should be set to
0.0.
Note: Thermistor coefficients stated on the thermistor calibration report may be
labeled differently. The best way to identify the coefficients to use with this
type is to match the equation above with the equation given on the calibration
report. Also, recognize that the coefficients for this equation generally have
positive exponents, e.g. B3: -6.23659E+06.
When the Thermistor R(T) conversion type is selected, the coefficients are dis-
played on the right portion of the bottom of the display. Use the UD buttons
to scroll through the coefficients. Use the Enter button to edit and save the new
setting. Press 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 parame-
ter, press the Exit button to exit to the menu.
7.2.1.8 YSI-400 Conversion
The YSI-400 conversion type is for 2252Ω thermistors matching the character
-
istics 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.
7.2.1.9 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.
1529 Chub-E4 Thermometer Readout
User’s Guide
42