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M2 Data Acquisition Device
Controls, and Features
The available functions are represented by graphic icons on the face of the tool. Descriptions of
the functions are given in the following table:
8.1.2 Soft Keys
The eight soft keys located above the rotary dial on the M2 unit are used to initiate a variety of
additional functions while performing meter tests. The functionality of the soft keys varies
according to what type of tests are being performed, as determined by the position of the rotary
switch. Some of the soft keys do not function for certain test modes.
Table 8-1 Data Acquisition Device rotary switch settings
Function
Icon
Description
Off
Switches power to the M2 unit off. The switch
should be in this position when the tool is not
being used to prevent battery drain.
Volts DC
Measures direct current (DC) voltages within a
range of zero to 1000 volts. This setting is also
used to measure frequency (hertz), duty cycle
(%), and time period (cycle, ms).
Volts AC
Measures alternating current (AC) voltages
within a range of zero to 1000 volts. This setting
is also used to measure frequency (hertz), duty
cycle (%), and time period (cycle, ms).
Resistance
Measures the DC resistance to current in ohms
in a range of zero to open circuit (infinite).
Continuity/
Diode Check
Performs dual tests; circuit continuity and diode
test (forward drop). The “S” (special function)
soft key switches between the two tests.
Auxiliary
Performs three auxiliary tests; current
(amperes), pressure, and temperature. The “S”
(special functions) soft key switches between
the three tests. Pre-approved sensors must be
used in order to take valid measurements.
Capacitance
Measures capacitance in nanofarad (nF),
millifarad (mF), and microfarad (µF).
Oscilloscope
(Waveform Viewer)
Configures the M2 unit to perform as one or two
channel oscilloscope, or waveform viewer.
Remote Functions
Configures the M2 unit to be operated through
the Display Device. Readings are also shown
on the Display Device screen. All of the controls
on the from panel of the M2 unit become
inoperative when the rotary switch is in this
position.
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