Keithley 2750 User Manual

14-4 FORMat and Misc SYSTem Commands Model 2750 Multimeter/Switch System User’s Manual
Figure 14-2
IEEE-754 data formats
s
#0
70707070
ef
Header
Byte 1 Byte 2 Byte 3 Byte 4
s = sign bit (0 = positive, 1 = negative)
e = exponent bits (8)
f = fraction bits (23)
Normal byte order shown. For swapped byte order, bytes sent
in reverse order: Header, Byte 4, Byte 3, Byte 2, Byte 1.
The Header is only sent once for each measurement conversion.
A. Single precision data format (32 data bits)
s
#0
70707070
ef
Header
Byte 1 Byte 2 Byte 7 Byte 8
Bytes 3, 4, 5, and 6 not shown.
s = sign bit (0 = positive, 1 = negative)
e = exponent bits (11)
f = fraction bits (52)
Normal byte order shown. For swapped byte order, bytes sent
in reverse order: Header, Byte 8, Byte 7 -- Byte 1.
The Header is only sent once for each measurement conversion.
B. Double precision data format (64 data bits)
2750-900-01.book Page 4 Wednesday, August 3, 2011 7:56 AM

Keithley 2750 Specifications

General

Interface	GPIB, RS-232, Ethernet
Switching Speed	Up to 500 channels/second
Maximum Voltage	300V
Operating Temperature	0°C to 50°C
Measurement Functions	DCV, ACV, DCI, ACI, 2-wire Resistance, 4-wire Resistance, Frequency, Temperature
Resolution	6.5 digits
Current	1A
Maximum Current	1A