Keithley 3720-ST User Manual

Section 4: Basic DMM operation Series 3700A System Switch/Multimeter Reference Manual
4-60 3700AS-901-01 Rev. D/June 2018
AC voltage and AC current optimize speed
Select:
• dmm.detectorbandwidth=300
• dmm.autodelays=dmm.OFF
• dmm.autozero=dmm.OFF
• dmm.autorange=dmm.OFF
• dmm.filter=dmm.OFF
• dmm.nplc=0.0005
Temperature optimize measurement speed
Select:
• dmm.transducer=dmm.TEMP_THERMOCOUPLE
• dmm.opendetector=dmm.OFF
• dmm.nplc=0.0005
• dmm.autozero=dmm.OFF
• dmm.filter=dmm.OFF
• dmm.autodelay=dmm.OFF
Optimizing AC voltage and current measurements
This table illustrates how to optimize AC volt or AC current measurements for input signal frequency,
reading rate, autodelay, and measure count.
Setting
Detector
bandwidth
Frequency
band
Aperture
time
Fixed
number of
samples per
reading
Auto
zero
Autodelay
(ms)
Measure
count
Total
measure
count
time (s)
Average
reading
(s)
SLOW
3
3 Hz to
300 kHz
1 ms, fixed
2000
N/A
200
Off
10
21.41167
0.467
Once
21.61796
0.463
On
23.41259
0.427
MED
30
30 Hz to
300 kHz
1 ms, fixed
200
N/A
200
Off
20
6.00595
3.33
Once
6.22548
3.213
On
10.0174
1.997
FAST
300
300 Hz to
300 kHz
8.33 µs
(10 µs)
min
1
Off
50
Off
100
0.00765
13,070
Once
0.15072
663.5
On
5.08854
19.65
FAST
300◄
300 Hz to
300 kHz
16.67 ms
(20 ms)
1
On◄
50
Off
100
2.35427
42.48
Once
◄
2.50335
39.95
On
7.08160
14.12
Default setting ◄ at 50 Hz power line frequency.

Keithley 3720-ST Specifications

General

Brand	Keithley
Model	3720-ST
Category	Multimeter
Language	English