Agilent Technologies Switch/Measure Mx+B Scaling, Scaled Reading = Gain x Measurement + Offset

2Features 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

•You must configure the channel (function, transducer type, etc.) before applying any scaling values. If you change the measurement configuration, scaling is turned off on that channel and the gain and offset values are reset (M=1 and B=0). Scaling is also turned off when you change the temperature probe type, temperature units, or disable the internal DMM.

•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, scaling is turned off on those channels but the gain and offset values are not cleared. If you decide to add a channel back to the scan list (without changing the function), the original gain and offset values are restored and scaling is turned back on. This makes it easy to temporarily remove a channel from the scan list without entering the scaling values again.

•You can specify a custom label with up to three characters. You can use letters (A- Z), numbers (0- 9), an underscore ( _ ), or the “#” character which displays a degree symbol ( ° ) on the front panel (displayed as a “#” in an output string from the remote interface). The first character must be a letter or the “#” character (the “#” character is allowed only as the leftmost character in the label). The remaining two characters can be letters, numbers, or an underscore. Blank spaces are not allowed.

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

40 34980A User’s Guide