4
Fast scanning
Fast scanning is achieved by using the 7710 module (which has high-speed solid state FET relays)
with the Model 2701 mainframe. With mainframe speed settings optimized for DCV or ohms mea-
surements, the Model 2701 can scan approximately twice as fast as the Models 2700 and 2750.
To achieve the fastest scan possible, use the following Model 27xx mainframe settings for the
scan:
VOLT:AVER:STAT OFF
‘ Disables filtering.
VOLT:DIG 4
‘ Sets display resolution to 4.5 digits.
VOLT:NPLC X
‘ Sets reading rate:
‘ where: X = 0.01 (2700 and 2750).
‘ X = 0.002 (2701)
SYST:AZER:STAT OFF
‘ Disables auto-zero.
SYST:LSYN OFF
‘ Disables line synchronization.
TRIG:DEL 0
‘ Sets trigger delay to 0 seconds.
FORM:DATA ASCII
‘ Formats data as an ASCII string (N/A for 2701).
FORM:ELEM READ
‘ Returns each reading with units only.
CALC3:OUTP OFF
‘ Disables limit outputs.
CALC3:LIM1:STAT OFF
‘ Disables limit 1 test.
DISP:ENAB OFF
‘ Turns off display.
When finished with the scan, the display can be turned back on with the following command:
DISP:ENAB ON
‘ Turns on display.
Fast scan using 7710 module with Model 2701 mainframe
The following Visual Basic (VB) Version 6 program demonstrates using the Model 7710 card and
Model 2701 mainframe to achieve fast scanning. It makes use of WinSocket control to communicate
with the Model 7701 mainframe. This User’s Guide is provided as a PDF file on the product informa-
tion CD-ROM. From Acrobat Reader, the program code can be copied and pasted into Visual Basic.
Topics
Topics
Topics
Summary of Contents for 7710
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