Product Manual

7526A
Users Manual
6-24
RTD_TYPE
This command sets the Resistance Temperature Detector (RTD) sensor type for RTD
source and measure. Typically, before you use the RTD_TYPE command to select the
RTD type, use the TSENS_TYPE command to select RTD mode, and afterwards set the
output temperature with the OUT command, if applicable. A change in temperature
sensors sets the output to 0 °C. Note that the SPRT can only be used to measure signals,
not source them.
Parameters: <value>
where <value> is one of the these:
PT385_100 100-ohm RTD, curve a=0.00385
ohms/ohm/°C
PT385_200 200-ohm RTD, curve a=0.00385
ohms/ohm/°C
PT385_500 500-ohm RTD, curve a=0.00385
ohms/ohm/°C
PT385_1000 1000-ohm RTD, curve a=0.00385
ohms/ohm/°C
PT392_100 100-ohm RTD, curve a=0.003926
ohms/ohm/°C
PTJIS_100 100-ohm RTD, curve a=0.003916
ohms/ohm/°C
CU10 10-ohm RTD, empirical curve
NI120 120-ohm RTD, empirical curve
YSI_400 YSI thermistor curve
OHMS_HIGH 4000 ohms range
OHMS_LOW 400 ohms range
SPRT standard PRT with user defined error
coefficients, only available for
measurement
USR_DEF<x> RTD with user defined custom
coefficients, where x is the curve
number and ranges from 1 to 5, i.e.
USR_DEF2 for curve 2
Response: <None>
Example: RTD_TYPE PTJIS_100
This example puts the RTD sensor to a 100-ohm type, with
the PT3916 curve (a=0.003916 ohms/ohm/°C). The resistance
of 100 ohms refers to the ice point property, the resistance of
the RTD at 0 °C (32 °F).