Magnetic Instrumentation 2130 User manual

8431 Castlewood Drive, Indianapolis, IN 46250 USA
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E-Mail: [e-mail] •www.maginst.com
Fluxmeter
Model 2130
Instruction Manual
Revision 3, 18-March-2013
Starting with Serial Number 41554

Manual Symbols and Messages
The following symbols and messages are used throughout this manual.
The WARNING Message indicates that a condition exists that
may be hazardous to the user, such as high voltage etc. Please
pay especially close attention to these messages.
The CAUTION Message indicates that a condition exists that
may cause damage to the Model 2130.
The display symbol indicates the information displayed by the
Model 2130 after a preceding step is executed.
The EXAMPLE message indicates that an example follows.
000.01 kMT Mi
100 kMT NORM
EXAMPLE:

CONTENTS
i
Table of Contents
1. INTRODUCTION ............................................................................................................................. 1-1
1.1 OVERALL DESCRIPTION................................................................................................................ 1-1
1.1.1 Overview.............................................................................................................................. 1-1
1.1.2 Key Features........................................................................................................................ 1-1
1.2 FRONT PANEL DESCRIPTION......................................................................................................... 1-2
1.3 REAR PANEL DESCRIPTION........................................................................................................... 1-3
1.4 DISPLAY DESCRIPTION ................................................................................................................. 1-4
1.5 SPECIFICATIONS............................................................................................................................ 1-5
1.5.1 Accuracy Specifications....................................................................................................... 1-5
1.5.2 I/O Specifications ................................................................................................................ 1-5
1.5.3 General Specifications......................................................................................................... 1-6
1.5.4 Radiated RF Immunity......................................................................................................... 1-6
2. INITIAL SETUP................................................................................................................................ 2-1
2.1 UNPACKING.................................................................................................................................. 2-1
2.2 MODEL 2130 FUNCTIONAL CHECK............................................................................................... 2-1
3. USING THE MENU SYSTEM......................................................................................................... 3-1
3.1 GENERAL MENU DESCRIPTION..................................................................................................... 3-1
3.2 MENU SYSTEM NAVIGATION........................................................................................................ 3-1
3.3 MENU ITEM DESCRIPTIONS .......................................................................................................... 3-1
3.4 SETTING THE DISPLAY PERIOD ..................................................................................................... 3-4
3.5 SETTING THE MEASUREMENT UNITS ............................................................................................ 3-5
3.6 SETTING THE COIL RESISTANCE.................................................................................................... 3-6
3.7 SETTING THE COIL AREA.............................................................................................................. 3-7
3.8 SETTING THE COIL TURNS ............................................................................................................ 3-8
3.9 SETTING THE HELMHOLTZ CONSTANT FOR USE WITH HELMHOLTZ COILS .................................... 3-9
3.10 SETTING THE MAGNET VOLUME................................................................................................. 3-10
3.11 VIEWING THE CALIBRATION COEFFICIENT.................................................................................. 3-11
3.12 SETTING THE LOWER LIMIT ........................................................................................................ 3-12
3.13 SETTING THE UPPER LIMIT ......................................................................................................... 3-13
3.14 SETTING THE RELATIVE OFFSET ................................................................................................. 3-14
3.15 ENABLING/DISABLING THE DRIFT RATES.................................................................................... 3-15
3.16 SETTING FACTORY DEFAULT CONFIGURATION........................................................................... 3-16
3.17 SETTING THE GPIB ADDRESS..................................................................................................... 3-17
3.18 SETTING THE DC/AC FUNCTION................................................................................................. 3-18
3.19 SETTING THE KEYPAD ACTIVE FUNCTION .................................................................................. 3-19
3.20 SELECTING THE ACTIVE SETUP #................................................................................................. 3-20
4. MEASUREMENT CONSIDERATIONS........................................................................................ 4-1
4.1 GENERAL MEASUREMENT CONSIDERATIONS ............................................................................... 4-1
4.2 SELECTING THE MEASUREMENT MODE (DC, AC) AND MAX HOLD FUNCTION............................. 4-1
4.2.1 DC Mode ............................................................................................................................. 4-1
4.2.2 AC Mode.............................................................................................................................. 4-2
4.2.3 Max Hold Function.............................................................................................................. 4-2
4.3 SELECTING THE MEASUREMENT MODE (NORMAL,DUAL LIMITS,RELATIVE).............................. 4-2
4.3.1 Normal Mode....................................................................................................................... 4-2
4.3.2 Dual Limits Mode................................................................................................................ 4-3
4.3.3 Relative Mode...................................................................................................................... 4-3
4.4 SELECTING THE MEASUREMENT RANGE....................................................................................... 4-3
4.5 SELECTING THE MEASUREMENT UNITS ........................................................................................ 4-3

CONTENTS
ii
4.5.1 Maxwell-Turns..................................................................................................................... 4-3
4.5.2 Maxwells.............................................................................................................................. 4-4
4.5.3 Gauss................................................................................................................................... 4-4
4.5.4 Tesla .................................................................................................................................... 4-4
4.5.5 Bdi-Gauss............................................................................................................................ 4-4
4.5.6 Bdi-Tesla.............................................................................................................................. 4-4
4.6 SELECTING A SEARCH COIL.......................................................................................................... 4-4
4.6.1 Number of Turns.................................................................................................................. 4-4
4.6.2 Coil Resistance .................................................................................................................... 4-4
4.6.3 Coil Area ............................................................................................................................. 4-5
4.7 SELECTING A HELMHOLTZ COIL ................................................................................................... 4-5
4.7.1 Helmholtz Coil Diameter..................................................................................................... 4-5
4.7.2 Helmholtz Coil Resistance................................................................................................... 4-5
4.7.3 Helmholtz Constant ............................................................................................................. 4-5
4.8 USING THE ZERO KEY .................................................................................................................. 4-6
4.9 USING THE DRIFT KEY.................................................................................................................. 4-6
4.10 USING THE ANALOG OUTPUT........................................................................................................ 4-7
4.11 USING THE DUAL LIMIT OUTPUTS ................................................................................................ 4-7
4.12 USING THE REMOTE RESET........................................................................................................... 4-8
4.13 SOURCES OF ERROR ..................................................................................................................... 4-8
4.13.1 Coil Orientation................................................................................................................... 4-8
4.13.2 Coil Parameters................................................................................................................... 4-9
4.13.3 Sample Volume.................................................................................................................... 4-9
4.13.4 Instrument Specifications..................................................................................................... 4-9
4.13.5 Interference of coil signal with zero/self-test mode............................................................. 4-9
5. THEORY OF OPERATION............................................................................................................ 5-1
5.1 MEASUREMENT OF FLUX.............................................................................................................. 5-1
5.2 MEASUREMENT OF FLUX DENSITY............................................................................................... 5-2
5.3 METHOD OF INTEGRATION............................................................................................................ 5-2
6. REMOTE OPERATION .................................................................................................................. 6-1
6.1 GENERAL COMMUNICATION DESCRIPTION................................................................................... 6-1
6.2 COMMUNICATION SETTINGS......................................................................................................... 6-1
6.2.1 RS-232 Settings.................................................................................................................... 6-1
6.2.2 IEEE-488 Settings ............................................................................................................... 6-1
6.3 USING THE REMOTE INTERFACE................................................................................................... 6-1
6.4 COMMAND REFERENCE................................................................................................................ 6-3
7. SERVICE ........................................................................................................................................... 7-1
7.1 GENERAL...................................................................................................................................... 7-1
7.2 TROUBLESHOOTING...................................................................................................................... 7-1
8. CONNECTOR PIN ASSIGNMENTS..............................................................................................8-1
8.1 GPIB CONNECTOR PIN ASSIGNMENTS ......................................................................................... 8-1
8.2 RS-232 CONNECTOR PIN ASSIGNMENTS ...................................................................................... 8-2
8.3 AUXILIARY CONNECTOR PIN ASSIGNMENTS................................................................................. 8-3
9. UNITS CONVERSION..................................................................................................................... 9-1
9.1 CGS -SI CONVERSION ................................................................................................................. 9-1
10. DECLARATION OF CONFORMITY...................................................................................... 10-1
11. INDEX.......................................................................................................................................... 11-1

CONTENTS
iii
List of Figures
FIGURE 1.2.1 MODEL 2130 FRONT PANEL.................................................................................................. 1-2
FIGURE 1.3.1 MODEL 2130 REAR PANEL................................................................................................... 1-3
FIGURE 1.4.1 MODEL 2130 DISPLAY.......................................................................................................... 1-4
FIGURE 3.3.1 MODEL 2130 MENU SYSTEM ................................................................................................. 3-2
FIGURE 4.2.1 SEARCH COIL ORIENTATION................................................................................................. 4-2
FIGURE 4.13.1 SEARCH COIL ORIENTATION ERROR................................................................................... 4-8
FIGURE 5.3.1 MILLER INTEGRATOR ........................................................................................................... 5-2
FIGURE 8.1.1 GPIB CONNECTOR ............................................................................................................... 8-1
FIGURE 8.2.1 RS-232 CONNECTOR ............................................................................................................ 8-2
FIGURE 8.3.1 AUXILIARY CONNECTOR ...................................................................................................... 8-3
List of Tables
TABLE 1.2.1 MODEL 2130 FRONT PANEL ITEMS........................................................................................ 1-2
TABLE 1.3.1 MODEL 2130 REAR PANEL ITEMS.......................................................................................... 1-3
TABLE 1.4.1 MODEL 2130 DISPLAY ITEMS ................................................................................................ 1-4
TABLE 1.5.1 ACCURACY SPECIFICATIONS.................................................................................................. 1-5
TABLE 1.5.2 I/O SPECIFICATIONS............................................................................................................... 1-5
TABLE 1.5.3 GENERAL SPECIFICATIONS..................................................................................................... 1-6
TABLE 2.2.1 DEFAULT CONFIGURATION .................................................................................................... 2-2
TABLE 3.3.1 MENU ITEMS ......................................................................................................................... 3-3
TABLE 4.4.1 TYPICAL RANGE VALUES ...................................................................................................... 4-3
TABLE 4.6.1 MODEL 2130 INPUT IMPEDANCE ........................................................................................... 4-5
TABLE 4.13.1 REQUIRED COIL PARAMETERS............................................................................................. 4-9
TABLE 6.2.1 RS-232 SETTINGS.................................................................................................................. 6-1
TABLE 6.4.1 MENU STATE......................................................................................................................... 6-5
TABLE 6.4.2 MODE NUMBERS ................................................................................................................... 6-6
TABLE 6.4.3 RANGE NUMBERS.................................................................................................................. 6-6
TABLE 7.2.1 MODEL 2130 DISPLAY MESSAGES......................................................................................... 7-2
TABLE 8.1.1 GPIB CONNECTOR PIN ASSIGNMENTS................................................................................... 8-1
TABLE 8.2.1 RS-232 CONNECTOR PIN ASSIGNMENTS................................................................................ 8-2
TABLE 8.3.1 AUXILIARY CONNECTOR PIN ASSIGNMENTS.......................................................................... 8-3
TABLE 9.1.1 CGS-SI UNITS CONVERSION ................................................................................................. 9-1

CHAPTER 1 INTRODUCTION
1-1
1. INTRODUCTION
1.1 Overall Description
1.1.1 Overview
The Magnetic Instrumentation, Inc. Model 2130 Fluxmeter is a compact, precision,
microprocessor-controlled instrument capable of measuring static, alternating, or pulsed
magnetic fields. Twelve measurement ranges allow the user to configure the meter for
maximum resolution and accuracy from 100 kMaxwells to 100 MMaxwells (1 mWeber - 1
Weber) full scale. The meter configuration is completely accessible using either the front panel
keypad and menu system, or the RS-232 interface (IEEE-488 optional). Coil parameters such
as number of turns, area, and resistance can be read from or written to the M2130, or
manually entered using the menu system.
1.1.2 Key Features
•High Accuracy
•Low Drift with Automatic Drift Correction
•Measurement Ranges
•Single Button Zeroing and Calibration
•Measurement Functions (DC, AC, Peak)
•Modes of Operation (Normal, Dual Limit, and Relative)
•User-Defined Sampling Period from 10 ms to 2500 ms
•Readout in Maxwells, Maxwell Turns, Gauss, Tesla, Bdi (Gauss), or Bdi (Tesla)
•High Resolution (4
3
/
4
digit)
•32-Character Display
•Compact Size (12.6” x 6.9” x 2.9”)
•External Reset
•Factory-Set Default Mode
•Coil Parameters can be Stored and Read from Memory.
•Analog Output
•Dual Limit HI/GO/LO Outputs
•RS-232 Interface (Standard)
•IEEE-488 Interface (Option)
•Optional Rack Mount Kit (3.5" Single or Double Unit )
•Wide Selection of Search Coils and Helmholtz Coils Available

CHAPTER 1 INTRODUCTION
1-2
1.2 Front Panel Description
Figure 1.2.1 Model 2130 Front Panel
Item
Name Function
1 ENTER Key Selects menu options. A selection will be stored in the meter’s
configuration only if the ENTER key is pressed.
2 SET Key Toggles the menu system on or off. This key also allows
navigation through the various levels of the menu system.
3 RESET Key a) When the menu system is not activated, the RESET key
resets the Model 2130’s integrator.
b) When the menu system is enabled, the RESET key scrolls
(increments) through menu options and parameters.
4 MAX HOLD Key Switches between NORMAL and MAX HOLD modes of operation.
5 ZERO Key Allows the user to zero and calibrate the Model 2130’s integrator.
6 MODE Key Switches between the NORMAL, DUAL LIMITS, and RELATIVE
modes of operation.
7 RANGE Key Selects the measurement range of the meter.
8 DRIFT Key a) When the menu system is not enabled, the DRIFT key sets
the drift compensation. “No” means the automatic drift
compensation is disabled. “Lo”, “Mi” and “Hi” are enabled
states for the automatic drift compensation.
b) When the menu system is enabled, the DRIFT key scrolls
(decrements) through menu options and parameters.
9 Display Conveys all measurement and configuration information to the
user.
Table 1.2.1 Model 2130 Front Panel Items

CHAPTER 1 INTRODUCTION
1-3
1.3 Rear Panel Description
Figure 1.3.1 Model 2130 Rear Panel
Item
Name Function
1 ON/OFF
SWITCH Connects or disconnects the Model 2130 from AC line voltage
2 POWER
RECEPTACLE Connects the power cord to the Model 2130.
3 FUSE HOLDER Contains the line fuse for the 2130 meter. This fuse does not
affect the operation of the meter from a ±9 VDC power source.
4 PROBE
CONNECTOR
1
Connects a sense coil or Helmholtz coil to the Model 2130.
5 RANGE
SWITCH Coarse range selection (fine range selection is made via the front panel RANGE key).
6 J6 AUXILIARY
CONNECTOR Allows access to the analog output, limits outputs, ±9 VDC input connections, and remote reset.
7 J1 GPIB
CONNECTOR Interfaces the Model 2130 to a GPIB controller.
8 J3 RS-232
CONNECTOR Interfaces the Model 2130 to a PC serial port.
Table 1.3.1 Model 2130 Rear Panel Items
1
The mating “dual miniature banana plug” (two pin plug) can be ordered as Magnetic
Instrumentation part number 63012480. A “single miniature banana plug” (one pin plug) is
available as part number 63012481.

CHAPTER 1 INTRODUCTION
1-4
1.4 Display Description
Figure 1.4.1 Model 2130 Display
Item
Name Function
1 POLARITY Indicates the polarity of the measured flux.
2 MEASUREMENT Indicates the magnitude of flux being measured.
3 UNITS Indicates the measurement units currently selected.
4 DC/AC Indicates whether the Model 2130 is measuring a static or
alternating flux. This space is blank when the meter is in DC
mode. The letters AC are displayed when the meter is in AC
mode.
5 DRIFT
CORRECTION Indicates the drift correction speed currently selected. When no dots appear before the drift correction speed, the reading is
approximately within +0.5% of the displayed range and the the
meter is continuosly performing drift correction. When a single
dot appears before the drift correction speed, the reading is
between approximately +0.5 to +1% or -0.5 to -1% of the
displayed range and the the meter is continuosly performing drift
correction. When two dots appear before the drift correction
speed, the reading is outside of the aforementioned percentages
of the displayed range and no drift correction is being performed.
6 MODE Indicates the measurement mode currently selected.
7 RANGE Indicates the range currently selected.
Table 1.4.1 Model 2130 Display Items