Magnetic Instrumentation 2130 User manual

8431 Castlewood Drive, Indianapolis, IN 46250 USA
[phone] •Fax [phone] .
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

CHAPTER 1 INTRODUCTION
1-5
1.5 Specifications
1.5.1 Accuracy Specifications
Function Range Typical
( % of range ) Maximum ( % of range ) Conditions
Normal (DC) 10
5
- 10
8
0.050 0.100 -
AC (RMS) 10
5
- 10
8
0.500 1.000 20 Hz - 30 Hz
AC (RMS) 10
5
- 10
8
0.300 0.700 30 Hz - 1 kHz
Max Hold (Peak) 10
5
- 10
8
0.300 0.800
≥ 1 ms Pulse width
Analog Output 10
5
- 10
8
0.150 0.400 Specification is for the
deviation of the analog
output compared to the
Model 2130 display
value.
Table 1.5.1 Accuracy Specifications
1.5.2 I/O Specifications
Interface Specification
Serial RS-232C
9600 baud rate, 8 data bits, no parity, 1 stop bit, no handshaking
DB-9 female connector
GPIB ( optional ) Complies with IEEE-488-1978
Analog Output 1 Volt full scale, Output impedance 100Ω
Dual Limit Outputs Low-power Schottky outputs ( 74LS37 )
DB-15 male connector
Source
V
OH
≥2.4 V @ ≤-1.2 mA
Sink
V
OL
≤0.4 V @ ≤48 mA
Remote Reset Low-power Schottky input (74LS37 )
DB-15 male connector
Input ( internal 10kΩpull up resistor )
V
IH
≥2.0 V
V
IL
≤0.8 V
Probe Input Single ended with separate chassis ground
Miniature banana jacks
input impedance
10
6
range = 1kΩ
10
7
range = 11kΩ
10
8
range = 101kΩ
Table 1.5.2 I/O Specifications

CHAPTER 1 INTRODUCTION
1-6
1.5.3 General Specifications
Property Specification
Size 12.6" x 6.9" x 2.9" ( L x W x H )
Weight 7.5 lbs.
Power 115 or 220 VAC 50/60 Hz
Fuse 0.25A 250V type 3AG
Table 1.5.3 General Specifications
1.5.4 Radiated RF Immunity
When operated in a field of 3.0V/M at frequencies from 26 MHZ to 500 MHZ reading may change
by as much as 40 KMT.

CHAPTER 1 INTRODUCTION
1-7
Safety Precautions
The following safety precautions must be observed at all times during operation or service of
this product. Magnetic Instrumentation, Inc. assumes no liability for failure to comply with
these requirements.
a) Fuse
Use only 0.25A 250V 3AG SLO-BLO type fuses in this instrument. In the event of a
malfunction, the use of any other fuse may increase the likelihood of an electrical fire.
Replacement fuses may be ordered as Magnetic Instrumentation part number 57600600.
b) Power Cord
Use only a three conductor power cord as supplied with this instrument. Ensure the power
receptacle to which the power cord is connected is properly wired, and that the safety
ground is connected to earth ground. If these precautions are not followed, electrical
shock could result.
c) Wet Environment
Do not operate this equipment in standing water or damp areas. Failure to follow this
precaution could result in electrical shock.
d) Repair or Modification
Do not attempt to open, modify or repair this equipment. Potentially lethal voltages are
present in the Model 2130. No user serviceable parts are contained in this instrument. If
repair or modifications are required, contact Magnetic Instrumentation, Inc. for assistance.
e) Handling
The Model 2130 is a rugged, dependable instrument. As with any precision instrument,
however, care should be taken when handling or storing this fluxmeter. Avoid dropping or
jarring the Model 2130. Store the Model 2130 in a cool dry environment when it is not in
use. Do not use solvents or abrasives to clean the exterior of this instrument.

CHAPTER 2 INITIAL SETUP
2-1
2. INITIAL SETUP
2.1 Unpacking
a) Before opening the Model 2130 shipping container, inspect for any obvious shipping
damage such as crushed, punctured, or torn packaging, water damage, etc. If such
damage is present, contact the shipping agent as soon as possible to submit a damage
claim.
b) If possible, keep the original shipping container. In the event that the Model 2130 needs to
be returned to Magnetic Instrumentation, Inc., the original shipping container will provide
the best means of repackaging the fluxmeter and accessories.
c) Open the shipping container, and inventory the contents to ensure that the order is
complete. Please report any missing items to Magnetic Instrumentation, Inc. immediately.
d) Inspect the Model 2130 for any obvious shipping damage such as cracked or scratched
display or keypads; bent or cracked rear panel connectors, or dented case. Inspect all
accessories for damage. Please report any damaged items to Magnetic Instrumentation,
Inc. immediately.
2.2 Model 2130 Functional Check
Before attempting to apply power to the Model 2130, ensure
that the meter is configured for the line voltage that will be
used. To determine the line voltage for which the meter is
configured, refer to the rear panel of the instrument.
a) Connect the Model 2130 to line power using the supplied power cord.
b) Connect a search coil, Helmholtz coil, or shorting bar to the rear terminal probe connector.
c) Apply power to the Model 2130 by placing the power switch to
the ON position. The display should momentarily display the
following message:
d) Set the Range Switch on the rear panel to “10
7
” position.
e) Press the front panel SET key until the menu system is active
and is at the top menu level. This is indicated by the
appearance of the “SET” message on the top row of the
display.
f) Press the front panel UP (RESET) key or the DOWN
(DRIFT) key until the menu system is set to the Default menu
item.
Magnetic
Instrumentation
SET
1. Display Period
SET
9. Default

CHAPTER 2 INITIAL SETUP
2-2
g) Press the front panel ENTER key to enter the menu
parameter level.
h) Press the front panel UP (RESET) key or the DOWN (DRIFT)
key to set the parameter to “All sets”.
i) Press the front panel ENTER key to set the meter
configuration to factory default. The menu system will return
to the Default menu item.
j) Press the front panel SET key to disable the menu system
and return to normal operation.
k) The Model 2130 is now set to factory default configuration. The following table indicates
the default configuration settings which are now enabled.
Menu Number Parameter Default Value
1 Display Period 300 ms
2 Units Maxwell Turns
3 Coil Parameter - Coil Resistance 0.0 Ohms
3 Coil Parameter - Coil Area 1.0 cm
2
3 Coil Parameter - Coil Turns 1 Turns
3 Coil Parameter - Helmholtz Constant 0.0143
4 Magnet Volume 1.0 cm
3
5 Calibration Coefficient 400000 MT/Vo
6 Dual Limits - Upper Limit +0000001500 MT
6 Dual Limits - Lower Limit +0000000500 MT
7 Relative Offset +000001000 MT
8 Drift Rates Lo, Mi and Hi enabled
9 Default Set to Default - NO
10 GPIB Address 1
11 DC/AC Function DC
12 Keypad Active active
13 Setup # 1
- Mode Normal
- Drift No
Table 2.2.1 Default Configuration
Set to Default
NO
Set to Default
All sets
SET
9. Default
00.000 MMT Mi
10 MMT NORM

CHAPTER 3 USING THE MENU SYSTEM
3-1
3. USING THE MENU SYSTEM
Set the rear panel range switch to 10
7
for all examples shown in this section.
3.1 General Menu Description
The Model 2130 menu system is composed of a three-level hierarchical arrangement of
optional settings and configuration information. The top level of the menu system allows
access to the major groups of menu options and configuration. Some of these major groups
are divided into sub-menus. These sub-menus make up the second level of the menu system.
The third level of the menu system contains the actual parameters that can be selected or
modified.
3.2 Menu System Navigation
The front panel SET key, ENTER key, UP (RESET) key, and DOWN (DRIFT) key are used to
navigate through the levels of the menu system, and to select and modify parameters.
Pressing the SET key when the menu system is inactive will activate the menu system.
Conversely, if the menu system is activated and set to the top level, pressing the SET key will
deactivate the menu system. If the menu system is active, and is set to either the sub-menu, or
parameter levels, pressing the SET key will place the menu system at the top level.
Pressing the ENTER key while the menu is set to either a top level menu item or a sub-menu
item causes the menu system to move down one level. Once the menu system is at the
parameter level, pressing the ENTER key stores any selected or modified parameter to the
meter’s configuration. Keep in mind that any selections or modifications made at the
parameter level will be saved only when the ENTER key is pressed. If a parameter is
mistakenly selected or modified, pressing the SET key will cause the parameter to revert to its
previous value.
The UP (RESET) key is used to scroll (increment) through the menu items on any menu level.
For example, pressing the UP key while the menu is set to the first item on the top menu (1.
Display Period) will cause the menu system to advance to the second menu item (2. Change
Unit).
The DOWN (DRIFT) key has a function similar to that of the UP key except that the menu item
will be decremented instead of incremented. There is one exception to this function of the
DOWN key. When the menu system is set to the parameter level, and the parameter requires
a numeric input (such as the Limits parameter), pressing the DOWN key causes the cursor to
advance one position to the right. This action allows the user to select the digit to be modified.
3.3 Menu Item Descriptions
The top level of the menu system is composed of thirteen menu items. Following is a
description of each item and the effect that selecting or modifying its parameters will have on
the operation of the Model 2130 Fluxmeter.

CHAPTER 3 USING THE MENU SYSTEM
3-2
Figure 3.3.1 Model 2130 Menu System
Normal Operation
(Menu Inactivated)
SET
1. Display Period
SET
2. Change Unit
SET
3. Coil Parameter
SET
4. Magnet Volume
SET
5. Calibration#
SET
6. Dual Limits
SET
7. Relative
SET
8. Drift Rates
SET
9. Default
SET
10. GPIB Address
SET
11. DC/AC
SET
12. Keypad Active
SET
13. Setup #
Coil Parameter
Coil Resistance
Coil Parameter
Coil Area
Coil Parameter
Coil #Turns
Coil Parameter
Helmholtz Const.
Dual Limits
Upper Limit
Dual Limits
Lower Limit
100 ms to
2500 ms
MT, M, G, T, Bdi-G,
Bdi-T
2500 ms
00000.00 Ohms to
99999.99 Ohms
00000.0000 cm
2
to
99999.9999 cm
2
000000 turns to
999999 turns
0.000000 to
9.999999
00000.0000 cm
3
99999.9999 cm
3
Read Only
No User Input
Varies with units
selected
2500 ms
Varies with units
selected
2500 ms
Varies with units
selected
2500 ms
Lo, Mi and Hi can each
be enabled or not.
No, This set,
All sets
+45°
0 to
30
DC or
AC
Pads All Active
Yes or No
Setup # 1 to
Setup # 8
Menu
Inactivated Top Menu Level Sub-Menu Level
Parameter Level

CHAPTER 3 USING THE MENU SYSTEM
3-3
Item # Name Description
1 Display Period Determines the time interval between display information updates. This interval may be
set to 10 ms for fast update, and from 100 ms to 2500 ms in 100 ms intervals. Setting
the display period to a low value will cause the display to update more frequently, and
will cause the fluxmeter to average fewer samples. Setting the display period to a
higher value will cause the display to update less frequently, and will cause the fluxmeter
to average a larger number of samples. The display period will also affect the speed
with which the Model 2130 will respond to remote interface commands (RS-232C and
IEEE-488). A longer interval leads to slower response.
2 Change Unit Determines the measurement units displayed by the Model 2130.
3 Coil Parameters Allows the user to enter information about the search coil or Helmholtz coil that is
connected to the Model 2130. Some of the parameters will only be utilized when a
particular measurement unit is selected. For instance, the Helmholtz constant is only
used when either the Bdi (Gauss) or Bdi (Tesla) units are selected. Other parameters,
such as coil resistance, are used by all measurement units. The fluxmeter ignores the
parameters that are not necessary for a particular measurement unit.
4 Magnet Volume Allows the user to enter the volume of a magnet specimen. This parameter is only used
when the Bdi (Gauss) or Bdi (Tesla) measurement units are selected.
5 Calibration # Allows the user to view the calibration correction coefficient for the Model 2130’s
integrator. This parameter cannot be modified by the user, but is updated by the
fluxmeter after each zero/calibration cycle.
6 Dual Limits Determines the lower and upper limits used by the Model 2130 while the Dual Limits
mode is selected.
7 Relative Determines the relative offset used by the Model 2130 while in the Relative mode of
operation.
8 Drift Rates Lo, Mi and Hi Drift Rates can each be either enabled or disabled.
9 Default Allows the user to reset the meter to factory default settings for all parameters.
Selecting the “This set” parameter will only set the current setup to default, while
selecting the “All sets” parameter will set all eight setups to default. Note that resetting
the Model 2130 to factory default will set the GPIB address to 1. If the GPIB remote
interface is used to set the Model 2130 to factory default, communication may be lost if
the fluxmeter GPIB address was previously set to any address other than 1.
10 GPIB Address Determines the GPIB address used by the Model 2130.
11 DC/AC Determines the measurement function used by the Model 2130.
12 Keypad Active The user can set all keypads to be active or only the RESET, DRIFT and ZERO keys to
be active. The latter selection requires a password, which is MH, RA, MH, RA, RA, MH,
RA, where MH stands for the MAX HOLD button and RA the RANGE button.
13 Setup # Determines the active setup number.
Table 3.3.1 Menu Items

CHAPTER 3 USING THE MENU SYSTEM
3-4
3.4 Setting the Display Period
a) Press the front panel SET key until the menu system is active
and is at the top menu level. This is indicated by the
appearance of the “SET” message on the top row of the
display.
b) Press the front panel UP (RESET) key or the DOWN (DRIFT)
key until the menu system is set to the Display Period menu
item.
c) Press the front panel ENTER key to enter the menu
parameter level.
d) Press the front panel UP (RESET) key or DOWN (DRIFT) key
to change the parameter to the desired display period. In this
example, the Display Period has been set to 500 ms.
e) Press the front panel ENTER key to store the changes to the
meter configuration. The menu system will return to the
Display Period menu item.
f) Press the front panel SET key to disable the menu system
and return to normal operation.
SET
1. Display Period
SET
1. Display Period
Display Period
100 ms
Display Period
500 ms
SET
1. Display Period
000.01 kMT Mi
100 kMT NORM

CHAPTER 3 USING THE MENU SYSTEM
3-5
3.5 Setting the Measurement Units
a) Press the front panel SET key until the menu system is active
and is at the top menu level. This is indicated by the
appearance of the “SET” message on the top row of the
display
b) Press the front panel UP (RESET) key or the DOWN (DRIFT)
key until the menu system is set to the Change Unit menu
item
c) Press the front panel ENTER key to enter the menu
parameter level.
d) Press the front panel UP (RESET) key or DOWN (DRIFT) key
to change the parameter to the desired measurement units.
In this example, the measurement unit is set to Gauss.
e) Press the front panel ENTER key to store the changes to the
meter configuration. The system will return to the Change
Unit menu item.
f) Press the front panel SET key to disable the menu system
and return to normal operation.
SET
1. Display Period
SET
2. Change Unit
Change Unit
Maxwell Turns
Change Unit
Gauss
SET
2. Change Unit
000.01 kG Mi
100 kG NORM