Keithley 2701 User Manual

F-8 Temperature Equations Model 2701 User’s Manual
RTD equations
The temperature vs. resistance readings listed in the RTD reference tables are calculated
using the Callendar-Van Dusen equation. There are two equations based on different
temperature ranges. There is an equation for the -200° to 0°C range and one for the 0° to
630°C range.
Equation for -200° to 0°C temperature range
R
RTD
= R
0
[1 + AT + BT
2
+ CT
3
(T-100)]
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)
C = -1 (alpha)(beta)(1e-8)
The alpha, beta, and delta values are listed in Table F-10.
Equation for 0° to 630°C temperature range
R
RTD
= R
0
(1 + AT + BT
2
)
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 Table F-10.

Keithley 2701 Specifications

General

Max Voltage	300 V
Max Current	3 A
Frequency Range	3 Hz to 500 kHz
Frequency Accuracy	0.01%
Weight	3.6 kg
Measurement Functions	Frequency, Temperature
Interface	IEEE-488 (GPIB), RS-232
DC Voltage Range	300 V
DC Current Range	3 A
AC Voltage Range	300V
AC Current Range	1 μA to 3 A
Resistance Accuracy	0.01%
Channels	10
Dimensions	213mm x 88mm x 370mm