Keithley 3730 User Manual

Section
5: Basic Digital Multimeter (DMM) Operation Series 3700 System Switch/Multimeter
User's Manual
5
-38 Document Number: 3700S-900-
01 Rev. A / August 2007
The thermocouple open detection times are listed in the following table.
Ion
Source
Settle
(msec)
IOPENL
EAD
Measure
(msec)
Phase
Internal DMM
Comm.
(msec)
Ioff
Source
Settle
(msec)
Line
Freq
(Hz)
T/C
Measurement
Time (msec)
Internal
DMM
Comm.
(msec)
1.0
0.8
0.4
1.0
60
min
max
0.06
0.0083
250
50
0.010
240
1. Default condition is dmm.opendetector=dmm.ON or 1.
2. For dmm.transducer=dmm.TEMP_THERMISTOR, dmm.TEMP_THREERTD, and
dmm.TEMP_FOURRTD, I
OPENLEAD
phase is disabled, but print(dmm.opendetector) returns 1.0.
3. dmm.opendetector is a common ICL command, shared with fourwireohms. To enable or
disable dmm.opendetector for either function, the appropriate function must be selected before
applying the new dmm.opendetector state. For example, to disable thermocouple open
detection, send dmm.func="temperature" then dmm.opendetector=0.
The following figure provides a schematic representation of the Series 3700 open thermocouple
detection.
Figure 5-22: Simplified T/C open lead detection schematic

Keithley 3730 Specifications

General

Brand	Keithley
Model	3730
Category	Multimeter
Language	English