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106 Agilent 34980A Mainframe User’s Guide

3 Features and Functions

Mx+B Scaling

The scaling function allows you to apply a gain and offset to readings

during a scan or while making measurements in the stand- alone DMM

mode. In addition to setting the gain (“M”) and offset (“B”) values, you can

also specify a custom measurement label for your scaled readings (RPM,

PSI, etc.). You can apply scaling to any multiplexer channels and for any

measurement function. Scaling is not allowed with any of the channels on

the digital modules.

• Scaling is applied using the following equation:



Scaled Reading = (Gain x Measurement) + Offset

• If you change the measurement configuration (function, transducer type,

etc.) on a channel or the internal DMM, scaling is turned off on those

channels but the gain and offset values are not cleared.

• If you plan to use scaling on a channel which will also use alarms, 

be sure to configure the scaling values first. If you attempt to assign

the alarm limits first, the instrument will turn off alarms and clear the

limit values when you enable scaling on that channel. If you specify a

custom measurement label with scaling, it is automatically used when

alarms are logged on that channel.

• If you redefine the scan list, no change will be made to the scaling

state or the gain and offset values. If you decide to add a channel back

to the scan list, the original gain and offset values are restored.

• You can specify a cust om label with up to three characters. You can use

letters (A- Z), numbers (0- 9), an underscore ( _ ), blank spaces, or the

“#” character which displays a degree symbol ( ° ) on the front panel

(displayed as a “#” in an output string from the remote interface).

• The maximum value allowed for the gain and offset is ±1E+15.

• The

CONFigure and MEASure? commands automatically set the gain

(“M”) to 1 and offset (“B”) to 0.

• A Factory Reset (

*RST command) turns off scaling, clears the scaling

values on all channels, and sets the custom label to a null string (“ ”). 

An Instrument Preset (

SYSTem:PRESet command) does not clear the

scaling values and does not turn off scaling.



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Agilent Technologies Switch/Measure Podręcznik Użytkownika Strona 114