Chapter 5 Remote Interface Reference

Mx+B Scaling Overview

Mx+B Scaling Overview

See also “Mx+B Scaling” in chapter 4 starting on page 119.

The scaling function allows you to apply a gain and offset to all readings on a specified multiplexer channel during a scan. 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 allowed with any of the digital channels on the multifunction module.

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,

wz z v. 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 vz 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.

A Factory Reset (*RST command) turns off scaling and clears the scaling values on all channels. An Instrument Preset (SYSTem:PRESet

command) or Card Reset (SYSTem:CPON command) yz

clear the

scaling values and yz

turn off scaling.

 

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HP 34970A manual Mx+B Scaling Overview, See also Mx+B Scaling in starting on