SETUP INSTRUCTIONS
INSTALL BATTERY
The battery compartment of the DMM550 is located at
the back of the meter.
To open the compartment, use a small Phillips-head
screwdriver to remove the single screw securing the
battery compartment cover/flip-up stand. Be careful not
to lose the small screw. Put the cover/stand to the side.
Plug the included “9V” battery into the wired socket
inside the compartment. The terminals of the battery and
the socket mate in only one way, with the smaller male
terminal plugging into the larger female terminal.
Secure the battery compartment by replacing the
cover/stand and reinstalling and tightening the Phillips-
head screw.
OPERATING INSTRUCTIONS
GENERAL INSTRUCTIONS
The DMM550 provides several functions that can be
applied to measurements and displays of multiple
parameters.
Ranging Options
By default, the meter automatically enters Auto Ranging
mode when powered on. In this mode, the meter chooses
the measurement range that maximizes the resolution of
its current, voltage, resistance, capacitance and
frequency measurements. The term
indicates
operation in Auto Ranging mode.
To switch to Manual Ranging for any parameter other
than temperature, press the
RANGE
button once. This will
make the
term disappear and cause the meter to
enter the broadest full-scale range available for that
parameter (see the Specifications section beginning on
p. 18 for a list of the measurement ranges available for
each parameter).
Once the meter is in manual ranging mode, each
subsequent press of the
RANGE
button reduces the full-
scale range by an order of magnitude (a factor of 10).
For example, pressing the
RANGE
button with the meter
AUTO
AUTO
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