Infratek SM201, User Manual, Page: 8 / 28

The menu-key control field consists of keys M1 through M6 and go with the 6 menus shown
along the bottom of the display. These menus are dynamically changing, depending on the cursor
position and other action you may take.
4-4 4-5
4.6. SELECTING A MEASUREMENT RANGE
When turning on the Spectral Multimeter the range selection is automatic. This is indicated by the
range annunciators on the left hand side of the display, e.g. 1A
A / 300mV A . To select the 5A- or
30A current input proceed as follows: Move the cursor to the „IN 5A “ annunciator and press the
SET-key . A pull down menu gives you 3 choices IN 5A/IN 30A/SHUNT . Now move the cursor
to the 5A- or 30-A input annunciator and press the SET-key . The choice of current input depends
on the maximum current flowing in your circuit to be measured.
The
A at the end of the range annunciator indicates autoranging.
To select a current range move the cursor to the current range annunciator and press the SET-key.
A pull-down menu of the possible ranges appears. Move the cursor to the desired range and press
the
SET-key . The range annunciator with the new range is now displayed and furthermore, the M
indicates manual ranging for current.
WARNING
Make sure not to overload current inputs, damage may occur to the instrument. Make sure when
wiring the Spectral Multimeter in a circuit that you are wiring the correct current input (5A or
30A) and make sure to select the correct input on the Spectral Multimeter front panel (IN 5A or IN
30A).
4.7. TAKING SOME BASIC MEASUREMENTS
WARNING
Read the Spectral Multimeter safety before operating this instrument.
The following procedures describe the basics of taking common measurements operating the
Spectral Multimeter from the front panel. These procedures are provided for the user who needs to
get started quickly.
WARNING
To avoid electrical shock or damage to the Spectral Multimeter, do not apply more than 850V
peak between any terminal and earth ground.
The user should be well aware of the fact, that switching off inductive loads may generate
extremely fast and high voltage transients exceeding above limits.
To measure voltage, current, power and related quantities in a circuit connect the test leads as
shown in figure 4.3 and described below.
voltage
Lo
5A
30A
max. 30A
max. 5A
N
L1
load
Fig. 4.3 Spectral Multimeter wiring in a single phase system
•
Turn off power in the circuit to be measured.
•
Break the circuit and connect phase L1 to the voltage input and current input as shown in
figure 4.3.
•
Switch on the Spectral Multimeter (it will start-up in automatic ranging and measuring Mode
P). Select the correct current input
IN 5A or IN 30A as described in 4.6.
•
Turn on power to the load to be measured.
•
The Spectral Multimeter will automatically select the voltage range and displays the following
six electrical quantities (display top to bottom) RMS-current, RMS-voltage, power, frequency,
apparent power, and power factor.
The bar graph of current shows the harmonic content.
•
Use the side menu to alter settings.