Agilent Technologies 34970A, User Manual, Page: 136 / 356

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Chapter 4 Features and Functions
Mx+B Scaling
Mx+B Scaling
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
is not 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, 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 remove a channel from the scan list (by selecting
CHANNEL OFF from the front panel or by redefining the scan list
from the remote interface), scaling is turned off for that channel but
the gain and offset values
are not cleared. If you decide to add that
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.
34970A Refresh UG.book Page 136 Wednesday, February 17, 2010 12:34 PM