Keithley DMM6500 Calibration Manual

Section 2: Performance verification Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual
2-18 DMM6500-905-01 Rev. A/July 2018
Equation for 0 °C to 850 °C temperature range
RRTD = R0 (1 + AT + BT2)
where:
• R
RTD
is the calculated resistance of the RTD
• R
0
is the known RTD resistance at 0 °C
• T is the temperature in °C
• A = alpha [1 + (delta/100)]
• B = –1 (alpha)(delta)(1E-4)
The alpha and delta values are listed in the following table.
RTD parameters for equations
The RTD parameters for the Callendar-Van Dusen equations are listed in the following table.
DMM6500 resistance to temperature device (RTD)
Type
Standard
Alpha
Beta
Delta
R
0
at 0 °C (Ω)
PT100
ITS-90
0.00385055
0.10863
1.49990
100.0000
D100
0.003920
0.10630
1.49710
F100
0.003900
0.11000
1.49589
PT385
IPTS-68
0.003850
0.11100
1.50700
PT3916
0.003916
0.11600
1.50594
Verify the simulated RTD temperature
Use the values in the tables following the steps below to verify the performance of the DMM6500.
Actual values depend on the published specifications (see Example reading limit calculation (on page
2-4)).
To verify RTD accuracy:
1. For 4-wire accuracy, connect the DMM6500 INPUT and SENSE terminals to the calibrator as
shown in the following figure.

Keithley DMM6500 Specifications

General

Resolution	6.5 digits
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
DC Current Range	10 µA to 10 A
AC Current Range	10 µA to 10 A
Temperature Range	-200 °C to 1820 °C
Display	5-inch capacitive touch screen
Resistance Range	100 MΩ
Frequency Range	3 Hz
Sampling Rate	1 MS/s
Connectivity	USB, LAN, GPIB (optional), TSP-Link
Memory	7 million readings