Chapter 5
Operations
5.1 General
This section of the manual contains complete operating instructions for the Model 2105 Digital
Power Analyzers. Included are control functions, connection methods, and operational
precautions.
5.2 Front Panel Controls
The functions of all front panel controls and indicators are described in the following
paragraphs.
5.2.1 Power Switch
Power is applied to the 2105 by placing the ON/OFF switch in the ON position. Application of
power is indicated by lighting of the digital displays.
5.2.2 V/I Key and Amps/Volts Display Indicator
The Amps/Volts Display Indicator specifies witch value is being displayed on the Amps/Volts
display. The user can switch between volts and amps by pressing the V/I key on the front panel
keypad.
5.2.3 Current Range Keys
These keys select the range of current that will be measured. For the greatest accuracy, select
the range that provides the highest resolution without exceeding the value of the range.
If the amount of current is unknown, select the highest current range before applying power to
the load. If the amount of current can be approximated, select the appropriate range.
5.2.4 Voltage Range Keys
These keys select the range of voltage that will be measured. For the greatest accuracy, select
the range that provides the highest resolution without exceeding the value of the range.
If the level of voltage is unknown, select the highest voltage range before applying power to the
load. If the level of voltage can be approximated, select the appropriate range.
5.2.5 Peak Amp Overload Indicator
This indicator may be used to alert the user to the presence of spikes on the input signal. If the
peak or steady-state current to the measured load is greater than 250% of the range selected
with the Current Range Key, the "Amps O/L" indicator illuminates. Select a higher current
range or reduce the current to the load to extinguish the indicator. Current and power displays
may or may not be correct and should not be trusted if this indicator is lit.
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