AGICO JR6 User manual

Ver. 2.2 May 2004
SPINNER MAGNETOMETER
JR6 / JR6A
User’s Manual
Instrument for measuring
remanent magnetization
AGICO
Advanced Geoscience Instruments Co.
Brno
Czech Republic

1
Contents
Contents ..............................................................................................................................................1
Warranty .............................................................................................................................................3
GENERAL SAFETY SUMMARY ............................................................................ 4
Convention........................................................................................................................................ 4
Injury Precautions ............................................................................................................................. 4
Product Damage Precautions ............................................................................................................ 4
1. INTRODUCTION................................................................................................... 6
1.1 Unpacking Instructions ................................................................................................................7
1.2 Storage and Transportation..........................................................................................................7
2. JR-6 / JR-6A SPECIFICATIONS ......................................................................... 8
3. DESCRIPTION ....................................................................................................... 9
3.1 Measuring Principle......................................................................................................................9
3.2 Power Supply Unit........................................................................................................................9
3.3 Pick-up Unit ..................................................................................................................................9
3.3.1 Specimen holder..................................................................................................................... 13
4. INSTALLATION PROCEDURES...................................................................... 15
4.1 Choosing the Place.....................................................................................................................15
4.2 Interconnection of Units ...........................................................................................................17
4.3 Magnetometer Switching On ......................................................................................................17
5. OPERATION......................................................................................................... 18
5.1 Program REMA6 ........................................................................................................................18
5.1.1 Setting the parameters............................................................................................................ 20
5.1.2 Calibration ............................................................................................................................. 21
5.1.3 Correction for the holder........................................................................................................ 21
5.1.4 Measurement routine.............................................................................................................. 22
6. MEASUREMENT ................................................................................................. 23

2
6.1 Shape and size of the specimen ..................................................................................................23
6.2 Marking of specimens.................................................................................................................23
6.3 Measurement in four positions ...................................................................................................23
6.4 Measurement in two and six positions........................................................................................25
6.5 Measurement with auto holder ...................................................................................................28
6.6 Measurement with semi-auto holder...........................................................................................29
7. ADDITIONAL INFORMATION ........................................................................ 30
7.1 Data File Format .........................................................................................................................30
7.2 Orientation Parameters ...............................................................................................................32
7.3 Maintenance and Repairs............................................................................................................34
7.3.1 Pick-up Unit – Setting up....................................................................................................... 35
7.3.2 Program JR6TEST................................................................................................................. 38
7.3.3 Auto-Position Manipulator – Setting up ................................................................................ 39
8. APPENDICES ....................................................................................................... 45
8.1 List of Errors...............................................................................................................................45
8.2 Configuration file PARJR6.CFG................................................................................................46
8.3 Configuration file PARJR6T.CFG .............................................................................................46
8.4 EC Declaration of Conformity....................................................................................................47
8.5 Accessories .................................................................................................................................48

3
Warranty
AGICO warrants that this product will be free from defects in materials and
workmanship for a period of 1 (one) year from date of installation. However, if the
installation is performed later than 3 (three) months after the date of shipment due to
causes on side of Customer, the warranty period begins three months after the date of
shipment. If any such product proves defective during this warranty period, AGICO, at
its option, either will repair the defective product without charge for parts and labour, or
will provide a replacement in exchange for the defective product.
In order to obtain service under this warranty, Customer must notify AGICO of the
defect before the expiration of the warranty period and make suitable arrangements for
the performance of service. AGICO will decide if the repair is to be performed by
AGICO technician or AGICO delegated serviceman in customers laboratory, or product
shall be sent for repair to the manufacturer. In latter case, customer shall be responsible
for packaging and shipping the defective product to the AGICO service centre. In both
cases, all the costs related to a warranty repair shall be at expenses of AGICO.
The warranty becomes invalid if the Customer modifies the instrument or fails to follow
the operating instructions, in case of failure caused by improper use or improper or
inadequate maintenance and care, or if the Customer attempts to install the instrument
without explicit written permission of AGICO company. AGICO shall not be obligated
to furnish service under this warranty a) to repair damage resulting from attempts by
personnel other than AGICO representatives to install, repair or service the product; b)
to repair damage resulting from improper use or connection to incompatible equipment;
or c) to service a product that has been modified or integrated with other products when
the effect of such modification increases the time or difficulty of servicing the product.
This warranty is given by AGICO with respect to this product in lieu of any other
warranties, expressed or implied. AGICO and its vendors disclaim any implied
warranties of merchantability or fitness for a particular purpose. AGICO’s responsibility
to repair or replace defective products is the sole and exclusive remedy provided to the
Customer for breach of this warranty. AGICO and its vendors will not be liable for any
indirect, special, incidental, or consequential damages irrespective of whether AGICO
or vendor has advance notice of the possibility of such damages.

4
General Safety Summary
Review the following safety precautions to avoid and prevent damage to this product or
any products connected to it.
Only qualified personnel should perform service procedures.
Convention
Symbol Attention is used to draw attention to a particular information.
Symbol Prohibition is used to accent important instruction, omission of which
may cause lost of properties, damage or injury.
Injury Precautions
Use Proper Power Cord. To avoid fire hazard, use only the power cord specified for
this product.
Do Not Operate Without Covers. To avoid electric shock or fire hazard, do not
operate this product with covers or panels removed.
Fasten Connectors. Do not operate the instrument if all connectors are not properly
plugged and fixed by screws.
Do Not Operate in Wet / Damp Conditions. To avoid electric shock, do not operate
this product in wet or damp conditions.
Do Not Operate in an Explosive Atmosphere. To avoid injury or fire hazard, do not
operate this product in an explosive atmosphere.
Disconnect Power Source. To avoid risk of electric shock unplug the instrument from
mains before reinstalling or removing unit.
Product Damage Precautions
Use Proper Power Source. Do not operate this product from a power source that
applies more than the voltage specified.

5
Use Proper Fuses only. Do not use fuses which are not specified by the manufacturer.
If a fuse with a different characteristics or value is used, the protection is not effective.
Operator’s Training. Operator should be familiar with operation of the instrument and
Safety Regulations.
Use Manufacturer’s Cables Only. Other devices can be connected to the instrument
via the appropriate cables only.
Do Not Disconnect Connectors. To avoid damage of the instrument never disconnect
any connector while device is on.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.

6
1. Introduction
The JR-6 / JR-6A dual speed spinner magnetometer is an innovated version of the
spinner magnetometer series JR-5 / JR-5A. It is used as a laboratory instrument for
measurements of remanent magnetization (RM) of rock specimens in studies of
magnetic properties of rocks.
The instrument is based on up to date micro-electronic components. Two
microprocessors control and test the speed of specimen rotation, signal gain, acquisition
of the data, carry out digital filtration, and control the auto-position manipulator. The
magnetometer is fully controlled by an external computer via a serial channel RS232C.
The spinner magnetometer JR-6A, equipped with the specimen auto-position
manipulator and the automatic specimen holder, enables automatic measuring of all
components of RM vector.
All features of the previous models are retained, including the possibility of using four
or six position standard specimen holders and repeat mode .
The low speed of rotation increase the possibility to measure the fragile specimens, soft
specimens placed in perspex container and/or specimens with considerable deviations in
size and shape.

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1.1 Unpacking Instructions
Remove carefully the instrument and its accessories from the box and packing material,
referring to the packing list included to confirm that everything has been delivered. Briefly
inspect each item for shipping damage. If anything is missing or damaged, contact the
manufacturer or your dealer immediately. You may want to retain the box and other
packing material in case you need to ship the instrument later.
1.2 Storage and Transportation
The properly wrapped instrument can be stored and transported at a temperature -20
o
C to +
55
o
C and relative humidity up to 80 %. In both cases the instrument should be stored in
suitable premises, free of dust and chemical evaporation.

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2. JR-6 / JR-6A Specifications
Specimen nominal size
automatic holder manual holder
Cylinder Diameter 25.4 mm (+0. 1 , -0. 5) 25.4 mm (+0. 5, -1. 0)
25.0 mm (+0. 1 , -0. 5) [
1
]
Length 22.0 mm (+0. 5 , -1. 0) 22.0 mm (+1. 0, -1. 0)
Cube 20.0 mm (+0. 1 , -0. 5 ) [
2
] 20.0 mm (+0. 2 , -1. 0)
22.7 mm (+0. 2, -1. 0) [
3
]
23.5 mm (+0. 2, -1. 0) [
3
]
Speed of rotation 87.7 or 16.7 rev/s
Measuring range auto range from 0 to 12500 A/m in seven ranges
Noise 2.4 µA/m [
4
]
Sensitivity 2.4 µA/m [
5
]
Accuracy of measurement of RM components 1 % , ± 2.4 µA/m [
6
]
Power requirements 230, 120, 100 V ± 10 %, 50/60 Hz, 40 VA
Dimensions, mass
- pick-up unit 310 x 190 x 185 mm, 24 kg
- power supply unit 200 x 160 x 120 mm, 2.5 kg
Operating temperature range +15 to +35
o
C
Storing temperature range - 20 to +55
o
C
Selectable parameters - speed of rotation (high, low)
- type of holder (auto, semi-auto, manual)
- type of specimen (cylinder, cube)
- number of positions for manual holder (2,4,6)
- time of integration (short, normal, long)
- measurement mode (single, repeat)
RS-232C serial channel - baud rate 19200, 8 data bits, no parity, 1 stop bit
1
Automatic holder for nominal diameter 25 mm (red arrow) on request only.
2
Automatic holder for cube 20mm available as an option only.
3
On request only.
4
Standard error of repeated measurement of any RM component, pick-up unit without specimen holder, the most sensitive range,
high speed of rotation, normal integration time.
5
Standard error of any RM vector component in repeated measurement. Specimen of the absolute value of RM less than 100 µA/m,
the measurement according standard measuring procedure in six positions, (each component is measured 4 times), high speed of
rotation, integration time set to “normal”.
6
Specimen of nominal size and shape. Deviations in size and shape will cause errors in position and/or possible increase of
vibrations during measurement and thus decrease precision of measurement.

9
3. Description
The JR-6 / JR-6A spinner magnetometer consists of a Power Supply Unit and a
combined Pick-up and measuring Unit.
3.1 Measuring Principle
Rock specimen of defined size and shape rotates at a constant angular speed in the pick-
up unit inside a pair of coils. An AC voltage is induced in the coils whose amplitude and
phase depend on the magnitude and direction of the RM vector of the specimen. The
voltage is amplified, filtered and digitized. By Fourier analysis the computer calculates
two rectangular components of the projection of RM vector into the plane perpendicular
to the axis of rotation.
3.2 Power Supply Unit
The power supply unit incorporates transformer and electronics for stabilization and test
of individual voltages.
On the front panel there is a two-color LED indicating the status of the power unit.
Green color means instrument is ready, and red color means error condition.
On the rear panel there are situated the mains switch with a fuse and 15-pole connector
for connecting the pick-up unit.
3.3 Pick-up Unit
The pick-up unit incorporates the main electronics board, the motor, the spinner system,
the pick-up coils with preamplifier and triple permalloy shield, and in the case of JR-6A
also the auto-position manipulator.
On the front panel there is a three-color LED indicating the status of magnetometer.
Green means instrument is ready, yellow on and blinking yellow indicates the
measurement procedure is in progress and red color means error condition.
On the right side there are two connectors. The 15-pole connector for connecting the
power supply unit and 9-pole connector for connecting the serial channel of your
computer.

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The mechanical part of the pick-up unit consists of a base plate, a trapezoidal plate on
which the motor and the bearing of the drive shaft are mounted, two circular plates with
spinner system, and a square plate with pick-up coils and permalloy shield.
The three adjustable screws (columns) on the base plate carry the circular plate on
springs with a spring-cushioned block bearing the body of the spinner system. Attached
to the shaft, mounted on sliding bearings, is a screen with 100+1 notches interrupting a
light beam that falls from two infra-red LEDs onto two phototransistors. The
phototransistors produce the reference signals used to control the speed of specimen
rotation and for digital processing of the signal.
Four columns with springs support the square plate bearing the pick-up coils fixed by
three screws.
The pick-up coils are shielded with a triple permalloy shield. The shaft of the spinner
system is connected with the shaft of the driving pulley by a universal coupling joint.
Fig. 3.1 Pick-up Unit – base and trapezoidal plate with motor

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The motor rotation is transferred by the driving belt. The speed of specimen rotation is
derived from a crystal oscillator.
Fig. 3.2 Pick-up Unit, square plate dismantled
Fig. 3.3 Detailed view to screen

12
Fig. 3.4 Spinner System

13
3.3.1 Specimen holder
The new version of spinner pick-up unit permits easy installation of the specimen
holders via a bayonet attachment of the specimen holder shaft. This new bayonet spindle
speeds up and simplifies the manipulation with the specimen holder.
Holder installation process:
Press and hold the ”lock button” by your one hand (to prevent turning of the shaft
during the holder installation) and put the holder in the shaft by your other hand.
Fig.3.5 Installation of holder – press and hold „lock button“ during holder installation

14
Press down slightly and at the same time turn the holder clockwise until the drive pin
slides into a notch of the holder. At this moment, press slightly more strongly
downwards (see Fig. 3.6a) to overcome the pressure of an elastic pad under the shank of
the holder until the drive pin fits into a horizontal part of the bayonet groove (see Fig.
3.6b). Continue turning the holder clockwise, without downward pressure until the
holder pops upward by a small amount (~1mm). At this moment the drive pin engages
the end of the bayonet groove and retains the holder in a fixed orientation relative to the
drive-shaft (Fig. 3.6c).
The upwards "jump" of the holder is necessary evidence of proper installation of the
holder. In the case of an absence of this jump, it is necessary to find out the cause. Even
a small impurity inside the shank of the holder can cause this problem and, in turn, the
automatic mechanism for changing specimen orientation may fail.
Holder removal:
Press and hold the “lock button” by your one hand to prevent turning of the shaft. By
your other hand push down the holder and at the same time turn the holder
anticlockwise until the drive pin meets the horizontal part of the bayonet groove (see
Fig. 3.7a). Continue turning the holder, without downward pressure, until the drive pin
reaches the vertical part of the bayonet groove (see Fig. 3.7b). Take the holder out in
this position by pulling the holder upwards, Fig. 3.7c ).
Fig. 3.6a Fig. 3.6b Fig. 3.6c
Fig. 3.7a Fig. 3.7b Fig. 3.7c

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4. Installation Procedures
The first installation and training is performed exclusively by the AGICO technician or
by the authorised representatives. If you need later to reinstall the apparatus, due to the
removing the instrument to another place or other reasons, be sure the following
conditions are met to achieve guaranteed parameters.
4.1 Choosing the Place
Place the apparatus to a room with relatively magnetically clean environment.
The instrument must not be placed near sources of alternating magnetic
field, e.g. big transformers, electric motors, electricity power source wires,
thermal sources etc. The distance between JR- 6 Power Supply Unit and the
Pick-up Unit should be 0.5 m at minimum.
Do not place the instrument near thermal and electrical sources and prevent
the pick-up unit from direct sunshine. The coils must not be exposed to heat
from the sun or from other sources, which would affect the precision of
measurement.
Do not place the pick-up unit near other instruments or computer monitors.
The temperature in the room should be stable as much as possible. The
temperature variation in the room should not exceed 3
o
C / hour.
Place the instrument and pick-up unit on a wooden table with good stability.
It is recommended to place the pick-up unit on a separate stand or a small
table which should be of such a height so that the middle of the pick-up unit
coincides with the level of the working table. This arrangement makes the
operation easier.
After transport the red retaining screws and washers must be removed from
the pick-up unit. For easier manipulation during installing and dismantling
transport screws, it is recommended to place the pick-up unit on two stands.
Attention: Use solid stands with good stability only, the pick-up unit has a mass of
more than 20 kg! See the following pictures. If the nominal sensitivity and precision
of the magnetometer are to be retained, the pick-up unit, the holders and the
specimens must be kept absolutely clean.

16
Fig. 4.1 Put the pick-up unit on stable solid
stands …
Fig. 4.2 …and remove red retaining screws …
Fig. 4.3 … pulling them down … Fig. 4.4 … and remove all red washers.

17
4.2 Interconnection of Units
Be sure the instrument is unplugged from mains during connecting or disconnecting the
cables.
A cable with 15-pin trapezoid connectors (power cable) is plugged into the rear panel of
the power supply unit and pick-up unit.
A cable with 9-pin female connectors (data cable) interconnects serial channel of your
computer with the pick-up unit.
Fix the connectors by screws. A special fixing screws are used in case of power supply
connectors to remind you later then the power supply connectors must not be unplugged
while the instrument is on. A fixing tool is a part of the accessories.
Plug the mains socket to appropriate voltage plug. The supply voltage is specified on
the label on the rear panel of the power supply unit.
Now you are ready to switch the instrument on.
4.3 Magnetometer Switching On
The magnetometer is powered on by the "ON/OFF" switch situated in the upper right
corner on the rear panel of power supply unit.
Upon switching on, the LED on the power supply unit is red for a while but after
approx. two seconds should change to green indicating that pick-up unit is properly
powered and connected. In case the LED remains red, the pick-up unit is not connected
or some voltage inside the power unit is wrong or missing.
The LED on the front panel of pick-up unit alternates all three colors in approx. one
second interval and remains green indicating the instrument is ready to operate. In case
the LED is off the pick-up unit is probably not connected to the power supply unit (the
power LED is red).
For the most sensitive measurements it is recommended to start with routine work
approx. 15 min. after the switching on the instrument.
In case the both (power and pick-up) LEDs are on and green, you are ready to start to
operate your spinner magnetometer by your connected computer.

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5. Operation
The magnetometer can be operated from the keyboard of an external computer via the
RS-232C serial channel using the program REMA6. The program enables on-line
measurement of the remanent magnetization vector, its conversion to geographic and
paleogeographic system, and data recording to the data file.
5.1 Program REMA6
To run the program REMA6.EXE configuration parameters file named PARJR6.CFG
should be present in current working directory. This file contains calibration constants
and configuration parameters. In case the file is missing, it can be created automatically.
It is not recommended to create the file automatically for the first time while learning
the operation of the magnetometer. The proper configuration file is always present on
the company diskette with software REMA6.
After running REMA6 the program lists the following page :
Then you are asked to select destination (directory) for your output data and the way
how the field data are to enter. There are three possibilities:
Input data from geological file F1
Manual input from memo-book F2
Non-oriented specimen F3
To select the mode press appropriate function key. In the case of F1, it is assumed the
geological file exist. If the field data for a specified specimen are missing in the
The program REMA6 processes JR-6 / JR-6A spinner magnetometer measurement
of remanent magnetization of rock specimen using Manual standard holder,
Semi-automatic holder or Automatic holder in case of JR-6A magnetometer.
Program generates the Text file with ext. [.TXT] in the same format as
displayed on the screen and the Data file [.JR6], which can be used as
an input file for the Advanced Data Interpretation by software REMASOFT.
The Geological file [.GED] can be optionally used to input field data.
It is assumed the Geological file is located in the same directory as
the Data file, but it is not necessary.
Program uses Configuration file PARJR6.CFG which should be present in the
current directory. This file contains calibration constants and configuration
parameters. In case the file is missing, it can be created automatically.
--> Switch ON the Spinner Magnetometer
--> Press any key to continue

19
geological file, one is asked to enter them from the keyboard manually. In case of F3 no
transformation to geographical coordinate system is calculated and results are presented
in the specimen coordinate system only.
Then the list of files which are ready for output and input are listed.
Next after pressing any key the program tests communication with instrument via serial
channel. In case the communication failed the program offers the change of serial port
number. Only COM1 and COM2 are available and program offers the change to other
port that failed in last check. In case the communication is O.K. the program does not
make possible to change serial port and the serial port number saved in configuration
file is used. Provided the user wish to change the port in this case from other reason, it is
necessary to edit the file PARJR6.CFG using any simple text editor. Format of the
PARJR6.CFG file is free. Sometimes may happen that the program is closed during
testing the serial communication due to the current port is declared for mouse. In such a
case also use a simple text editor to change the port number.
After successful test of communication the program displays the main page which
contains list of current configuration parameters and constants and function explanation
of the individual keys.
The frequently used routines are situated on function keys F1, F5 and F9.
ESC key stops the measurement.
--> Select Function Key
Current setting F1 - MEASURING ROUTINE
Tilt F2 - Tectonic Correction
12 90 6 0 F3 - Orientation Parameters
10.50 F4 - Specimen Volume
F5 - CALIBRATION ROUTINE
7.68 11.15 F6 - Calibration Standard Magnetization and Volume
Auto F7 - Holder Type [ Auto / SemiAuto / Manual ]
High F8 - Speed of Rotation [ High / Low ]
F9 - CORRECTION FOR HOLDER
F10 - Exit Program
Calibration constants Holder remanent values
Gain 6.735 Phase -35.17 H1 +0.00 +0.00 E-5
H2 +0.00 +0.00 E-5
H3 +0.00 +0.00 E-5
*** JR-6A READY
--> Check the set parameters
1 MEAS 2 Tecto 3 Opar 4 Svol 5 CAL 6 Std 7 Htype 8 Speed 9 CORR 10 Exit