Keithley 2750 - Page 126

Model 2750 Multimeter/Switch System User’s Manual Basic DMM Operation 3-35
Thermistor temperature measurement configuration
The steps to configure thermistor measurements are provided in Table 3-5. After pressing
SHIFT and then SENSOR, the menu starts at step 1 to select measurement units.
Each time you press ENTER to make a selection, the menu will automatically go to the
next selection. After pressing ENTER for the last step, the instrument will return to the
normal measurement state.
4-wire RTD temperature measurement configuration
The Alpha, Beta, Delta, and Ω at 0°C parameters for the five basic RTD types are provided
in Table 3-6. Note that these parameters can be modified using remote programming.
Table 3-5
Thermistor temperature measurement configuration
Step Menu structure Description
1 UNITS: C, F, or K Select temperature measurement units (°C, °F, or K).
2 SENS: THRMSTR Select the thermistor transducer.
3 TYPE: 2200Ω, 5000Ω, or 10kΩ Select thermistor resistance.
Table 3-6
RTD parameters
Type Standard Alpha Beta Delta Ω at 0°C
PT100 ITS-90 0.00385055 0.10863 1.49990 100Ω
D100 ITS-90 0.003920 0.10630 1.49710 100Ω
F100 ITS-90 0.003900 0.11000 1.49589 100Ω
PT385 IPTS-68 0.003850 0.11100 1.50700 100Ω
PT3916 IPTS-68 0.003916 0.11600 1.50594 100Ω
2750-900-01.book Page 35 Wednesday, August 3, 2011 7:56 AM