System Performance - Keithley 3720 User Manual

3706 Multimeter / Switch System

System Performance

System Performance
4-1/2 Digit Mode,
azero off and nPLC=0.0005
Function
Function Change
(msec)
DCV or 2W:
10
(<10K:)
20
4W: (<10k)
10
DCI
Frequency or
22
Period
17
85
ACV or ACI
Buffer Transfer Speed
Average for 1000 readings
Average for 1000 readings with timestamp
Card
3720, 3721, 3722,
3730
18
3723
3740
AC Speeds
Single Channel, 60Hz (50Hz) Operation
Function NPLC
ACI / ACV SLOW
MED
14
1.0
14
0.2
15
0.06
15
0.006
15
0.0083 (0.001)
0.0005
Frequency /
n/a
Period
13, 14
Range Auto-
Change range
(msec) (msec)
10 10
20 20
10 10

10
85 300
Enet
2450/s
2300/s
Command
channel.close (ch_list)
or
channel.open (ch_list)
channel.close (ch_list)
or
channel.open (ch_list)
channel.close (ch_list 1-28)
or
channel.open (ch_list 1-28)
channel.close (ch_list 29-32)
or
channel.open (ch_list 29-32)
Measurements into Buffer
(Rdg/s)
Aperture Azero
Digits
(ms) On
n/a 6-½ 0.45 (0.45)
n/a 6-½ 2.5 (2.5)
6-½
16.67 (20) 42 (33)
6-½
3.33 (4.0) 120 (100)
5-½
1.0 (1.2) 170 (165)
4-½
0.100 (0.120) 218 (215)
3-½
218 (215
2x input
SLOW, MED,
n/a period + Gate
FAST
time
GPIB USB
2000/s 1800/s
1800/s 1600/s
Single Command Excecution time
Enet GPIB
5.7
2.3
10.7
22.7
13
Measurement to PC
Azero
Enet
Off
n/a 2150 (2150)
n/a 400 (400)
59.5 (50) 19.4 (22.7)
295 (235) 7.6 (8.3)
935 (750) 1.40 (1.80)
6,200 (5,500) 0.55 (0.57)
14,600 (14,250) 0.50 (0.5)
2x input period
n/a + Gate time +
2.7ms
(ms)
USB
5.8 6.1
2.4 2.7
10.8 11.1
22.8 23.1
13
(ms / Rdg)
GPIB USB
2150 (2150) 2150 (2150)
400 (400) 400 (400)
19.5 (22.8) 19.8 (23.1)
6.2 (6.8) 6.4 (7.0)
1.50 (1.80) 1.60 (2.30)
0.65 (0.67) 0.75 (0.77)
0.60 (0.60) 0.70 (0.70)
2x input period 2x input period
+ Gate time + + Gate time +
2.8ms 3.1ms
Rev A 9/14/07