4-2 Return to Section Topics 2100-900-01 Rev. D / September 2011
Section 4: Front Panel Operations Model 2100 6 1/2-Digit Resolution Digital Multimeter User’s Manual
Introduction
This section contains information about how to change the parameters and settings for your
measurements, and details about each feature and function.
Measurement configuration
The following information will guide you through ways to configure measurement functions. It
provides you the flexibility to change any parameter in any measurement function when needed,
including the ADC setting, filter, resolution settings (digits), DC input resistance, threshold
resistance (continuity), range (manual and auto), rate (integration time), remote interface
selection, and input terminal switch.
Set ADC (Auto Zero and Auto Gain)
Zero and Gain
The Auto Zero and Auto Gain functions are used to minimize offset influence on your
measurements. When Auto Zero or Auto Gain is enabled, the Model 2100 takes the input signal
reading as a base value and then internally disconnects the input signal, taking an offset reading
(a null offset). It then subtracts the offset from the base to get an accurate measurement:
Displayed reading = base value (input signal) - offset value
When Auto Zero or Auto Gain is enabled, the meter takes an offset reading for each subsequent
measurement. However, when Auto Zero or Auto Gain is disabled, the meter only takes one offset
reading each time when you change the function settings. You can set the period to change the
time interval for taking an offset reading.
Defaults
The default settings for Auto Zero and Auto Gain are enabled by default. Selected values for Auto
Zero and Auto Gain are stored in volatile memory and the default settings will be restored when
the meter is turned-off.
How to set Auto Zero and Auto Gain
You can change the Auto Zero and Auto Gain settings using the front panel or through a remote
interface.
NOTE The Auto Zero setting is always affected by the resolution setting. Whenever the
resolution is altered, Auto Zero will change accordingly. The relationship between
resolution and Auto Zero is shown in
Table 4-1.
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