SatisGeo KT- 6 User manual
Field Rock Magnetic Susceptibility Meter
KAPPAMETER
KT- 6
Instruction Manual
portable geophysical instruments
tel/fax: +420 541 634 414 Ječná 29a
e-mail: info@satisgeo.com 621 00 Brno
www.satisgeo.com Czech Republic
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TABLE OF CONTENTS
1. GENERAL INFORMATION 4
1.1 Applications 4
1.2 Specifications 4
2. DESCRIPTION OF THE INSTRUMENT 7
2.1 Operating Principle 7
2.2 Design 7
3. OPERATION 8
3.1 Battery Instalation 8
3.2 Power ON/OFF 9
3.3 Measurement 10
3.4 Data Memory 13
3.5 Scan Mode 16
3.6 Low Battery Voltage Indication 18
3.7 Date and Time Set 18
3.8 Miscellaneous 19
4. MEASURING METHODS 20
4.1 Measured Value and Corrections 20
4.1.1 True and Apparent Susceptibility 20
4.1.2 Effect of the Gap between the Active Face of the
Instrument and the Rock Surface 21
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4.1.3 Corrections for Surface Unevenness and for Finite
Dimensions 22
4.1.4 Measurement on a Cylindrical Surface 23
4.2 Instructions for Measurement 24
4.2.1 Measurement on Outcrops 24
4.2.2 Piece Specimen Measurement 25
4.2.3 Drill Core Measurement 25
5. ERROR MESSAGES 26
6. MAINTENANCE 27
7. WARRANTY 28
8. CONNECTORS WIRING 29
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1. GENERAL INFORMATION
1.1 Applications
The pocket susceptibility meter KT-6 is designed for
quick field measurements of magnetic susceptibility of
outcropping rocks, drill cores and larger pieces of rocks.
The use of KT-6 is especially advantageous for selecting
of suitable specimens for further precise laboratory
studies of magnetic properties.
1.2 Specifications
Sensitivity:
1x10-5 SI units.
Measuring ranges: from -999 to 9999 x 10-3 SI
units with automatically
switched accuracy (9.99,
99.9, 999).
Operating frequency:
10 kHz.
Display:
4 digit LCD, 13 mm high.
Data memory:
up to 70 measurements.
Controls:
set switch,
two touch switches:
Clear/Measure [C/M],
Recall [RCL].
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Serial interface RS-232C:
Baud rate: 9600Bd.
Format: 10 bits (1 start, 8
data, 1 stop), no parity.
Power consumption:
10 mA (average).
Battery:
9 V alkaline, IEC standard
type 6LF22.
Ambient operating
temperature:
from -10OC to +55OC.
Dimensions (diameter x
length):
65 x 187 mm.
Weight :
0.35 kg (including battery).
Accessories:
leather case,
instruction manual,
RS-232C cable,
floppy disk with a
communication program.
Note: The instrument is delivered without the battery.
Fig. 1. Principal elements of KT-6
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2. DESCRIPTION OF THE INSTRUMENT
2.1 Operating Principle
The fundamental part of the instrument is an LC
oscillator of 10 kHz, the inductivity of which is embodied
by a flat measuring coil situated at the active face of the
instrument. The susceptibility measurement is performed
in two steps. The frequency of the oscillator is measured
with the coil at some distance from the rock (free space
measurement) and then with the coil applied to the rock
surface. From the frequency difference the true
susceptibility is computed by the built-in microcomputer
and then displayed. For the details see section 4.
Measuring methods.
2.2 Design
The use of a microprocessor and LSI circuits of very low
power consumption made it possible to decrease the size
of the instrument to such an extent that the KT-6 could
be designed for one-hand operation. A robust leather
case, which can be either carried on a strap over the
shoulder or worn on a waist-belt, facilitates the KT-6 field
manipilation.
The instrument case consist of two hermetically insulated
compartments. The water- and dust-proof front
compartment contains all electronics together with the
measuring coil, touch switches and display. The battery
and the set switch are housed in the rear compartment
covered with a lid - see Fig.1.
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3. OPERATION
3.1 Battery Instalation
Caution:
• Before any manipulation with the battery, the
instrument must be turned off.
The instrument is powered by one 9 V battery type
6LF22 IEC standard. The battery is housed in the rear
compartment of the instrument. The covering lid can be
removed by unscrewing the fixing screw. The battery is
then removed by pulling out the textile strip. A new
battery is then connected, the textile strip inserted and
the battery put in.
Caution:
• The battery compartment is not waterproof. If the
interior gets wet, the compartment must be dried
to prevent the contacts from corroding.
• If long-term storage of the KT-6 is anticipated,
remove the battery from the instrument to prevent
damage from electrolytic leakage. After long
storage always inspect the battery.
If a standard dry battery is used, the operation time will
exceed 100 hours. The instrument can also be powered
by a rechargeable battery. The operating time is then
shorter, approximately 30 hours. It is necessary to
recharge the battery outside the instrument using the
charger.
3.2 Power ON/OFF
The instrument can be switched on by pressing [any]
touch switch. The buzzer beeps and the display shows
the stand-by status:
Fig. 2
or
Fig. 3
while the switch is held down. This is also a test of the
display. The character ‘b’ left of the most significant digit
indicates low battery voltage. For further information see
section 3.6.
When the switch is released, the display shows the
current time (or date respectively).
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Fig. 4
If the display does not show the pattern given in Fig. 2 or
Fig. 3 or Fig. 4 and fails to do so even if the instrument is
switched on and off several times. proceed according to
section 5.
The instrument is switched off automatically 40 seconds
after the last pressing a switch.
3.3 Measurement
Immediately after switching on the instrument is ready to
measure. The measurement is carried out in two steps.
By pressing the switch [C/M] on the side of the
instrument (see Fig. 1) for the first time, the instrument is
cleared (zeroed); by pressing this switch for the second
time, the susceptibility of the specimen is measured.
To be cleared properly, the instrument must be removed
from the measured rock and from other magnetic or
conductive objects to a distance of at least 30 cm. The
clearing cycle takes about 0.3 s. At the end of the cycle
the display shows:
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