4.1
Measurement method
The instrument uses a probe which is excited by an
AC signal (60 kHz “L” or 500 kHz “H”) from the main
unit. This AC signal uses the material to be measured
as a coupling medium to a detector coil also in the
probe. From the phase and amplitude of the detected
signal the instrument calculates the conductivity of the
coupling medium.
Only conductivity of non-magnetic metallic materi-
als can be measured using this system. Conductivity
changes considerably with temperature so the probe is
fi tted with a thermistor. It’s temperature is monitored in
order to display a mathematically adjusted conductivity
reading relative to 20 °C. The instrument will indicate
the necessity for a Probe Reset after a temperature
change of +/–3 °C. The set routine should be carried
out just before a measurement if absolute accuracy is
required.
A certain amount of surface unevenness and nonmetallic
coatings up to 0.020" (0.5 mm) are allowed for in the
measurement system (0.010" (0.25 mm) only with the
8 mm probe). When the probe has exceeded this “lift-
off” distance, PROBE OFF METAL will be displayed.
4.2
Display
The display is a back lit LCD, the back light can be set
ON or OFF. When in Measurement Mode the display
will indicate the numerical value of the material being
measured in % IACS (I) or MegaSiemens/meter (S)
depending on the units selected. PROBE OFF METAL
is displayed if the probe is in air and not in close prox-
imity to a measurable material.
Other display modes can be selected which are used
for setting up operational parameters, or logging fi les
(see chapter 5). In these Modes the display will high-
light the parameter being set and its current status. In
the measurement mode Alarm States are indicated
by icons at the bottom of the display. The frequency,
probe code selected, measurement units and state of
charge of the battery are also shown at the bottom of
the display.
Measurement method
Basic functions
4 - 2
Issue 04, 06/2007
AutoSigma 3000
Summary of Contents for AutoSigma 3000 DL
Page 1: ...AutoSigma 3000 Technical Reference and Operation Manual Ident No 071 002 022 47DH01 105 952...
Page 6: ...0 6 Issue 04 06 2007 AutoSigma 3000...
Page 7: ...Introduction 1 AutoSigma 3000 Issue 04 06 2007 1 1...
Page 12: ...1 6 Issue 04 06 2007 AutoSigma 3000...
Page 13: ...Standard package and accessories 2 AutoSigma 3000 Issue 04 06 2007 2 1...
Page 16: ...2 4 Issue 04 06 2007 AutoSigma 3000...
Page 17: ...Preparation for operation 3 AutoSigma 3000 Issue 04 06 2007 3 1...
Page 27: ...Basic functions 4 AutoSigma 3000 Issue 04 06 2007 4 1...
Page 31: ...Operation 5 AutoSigma 3000 Issue 04 06 2007 5 1...
Page 47: ...External data handling devices 6 AutoSigma 3000 Issue 04 06 2007 6 1...
Page 52: ...6 6 Issue 04 06 2007 AutoSigma 3000...
Page 53: ...Specifications 7 AutoSigma 3000 Issue 04 06 2007 7 1...
Page 57: ...Maintenance and care 8 AutoSigma 3000 Issue 04 06 2007 8 1...
Page 59: ...Appendix 9 AutoSigma 3000 Issue 04 06 2007 9 1...
Page 62: ...9 4 Issue 04 06 2007 AutoSigma 3000...
Page 63: ...Index 10 AutoSigma 3000 Issue 04 06 2007 10 1...
