Ballantine 3207 User manual

INSTRUCTION MANUAL
MODEL
3207
DIGITAL
MICRO-OHM METER
Ballantine Laboratories, Inc.
www.ballantinelabs.com
e-mail: [email protected]
312 Old Allerton Road, Annandale, New Jersey 07927, USA
Phone: [phone], Fax: [phone]
90-10353-5 November 2012

LIMITED WARRANTY
Ballantine Laboratories, Inc. warrants its products to be free from defects in
material and workmanship. Rigorous quality control permits a standard new
equipment warranty on material and workmanship of one year from date of
shipment. During the in-warranty period, we will service or, at our option, replace
at the factory, any device that fails in normal use to meet its published
specifications. Computers, batteries, relays, and thermal elements that have given
normal service are exempted. Special systems will have warranty periods as listed
in their quotation.
The company makes no warranties or representations as to performance of products or
as to service to purchaser or to any other person, except as set forth in the company's
limited warranty accompanying delivery of products. The company reserves the right to
change the warranty and service policy set forth in such limited warranty, or otherwise, at
any time without further notice and without liability to purchaser or to any other person by
reason of any such change unless considered unenforceable or unlawful under applicable
law: i) All implied warranties, including, but not limited to implied warranties of
merchantability and fitness for a particular purpose, are hereby excluded, ii) The liability of
the company, if any, for damages relating to allegedly defective products shall, under legal
or equitable theory, be limited to the actual price paid by purchaser for such products and
shall in no event include incidental or consequential damages of any kind, iii) 90 day
warranty on all factory service repairs.
Ballantine Laboratories, Inc.
Annandale, New Jersey, USA
[e-mail]

CERTIFICATION
Ballantine Laboratories, Inc. certifies that this equipment meets all
applicable Ballantine specifications at time of shipment from the
factory as determined by thorough testing and inspection. Ballantine
further certifies that its measurements are traceable to the United
States National Institute of Standards and Technology. All
instruments used in calibrating Ballantine products are standardized
by systematic reference to NIST-traceable standards.
REFERENCE STANDARDS
DC 10mV-750V 0.002%-0.003%
20Hz-50kHz 0.5V-500V 0.004%
20Hz-10MHz 0.5V-100V 0.05%
DC-30MHz 0.5V-100V 0.35%
DC-700MHZ 10uV-0.5V 1%-NIST
10MHz-1000MHz 1V-300V 1%-NIST
Ballantine's Quality Assurance program satisfies the requirements of MIL-I-45208
WORKING STANDARDS
STANDARD RESISTORS, BALLANTINE 1380A
THERMAL VOLTAGE CONVERTERS, BALLANTINE 1394A
TRANSFER STANDARD, BALLANTINE 1605A
MICROPOTENTIOMETERS, BALLANTINE 440
RATIO TRANSFORMERS
,
GERTSCH

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TABLE OF CONTENTS Page No.
Unpacking & Initial Inspection 9
SECTION 1 GENERAL INFORMATION 11
1.1 Introduction 11
1.2 Features 11
1.3 Applications 11
1.4 Controls , indicators & terminals 13
1.5 Optional Accessories 14
1.7 OPTIONS 15
SECTION 2 SAFETY INFORMATION 17
2.1 Safety Requirements 17
2.2 Safety symbols & terms 17
2.3 Warning 18
2.4 Caution 18
SECTION 3 PREPARATION FOR OPERATION 19
3.1 Installation 19
3.2 Power requirement 19
3.3 Bench Mounting 20
3.4 Using Test Leads 21
3.5 Zeroing the Instrument 21
3.6 Pulse mode operation 21
3.7 Continuous mode operation 22
3.8 Precaution to be taken for various types of measurement 22
SECTION 4 MAKING MEASUREMENTS 24
4.1 Making Measurement 24
4.2 Computer Interfacing 26
SECTION 5 CARE AND MAINTENANCE 28
5.1 Care & Maintenance 28
5.2 Replacing the Fuse 28
5.3 General Maintenance 29
5.4 Reshipment 29
SECTION 6 SPECIFICATIONS 30
6.1 Electrical Specification 30
6.2 Environmental Specification 30
6.3 General specification 30
SECTION 7 OPTIONAL ACCESSORIES 32
ATTACHMENT – CALIBRATION FORM 35

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Figure 1-1. Model 3207 Digital Micro-Ohmmeter
(Shown with optional Kelvin Clips)

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UNPACKING AND INITIAL INSPECTION
Check for following items when you unpack your instrument from the carton
1. INSTRUMENT (MODEL) : MICRO OHMMETER 3207 1
2.ACMAINSCORD: 1
3. SPARE FUSES
a) 1 Amp : 1
b) 250 mA (or 500 mA for Option – 05)
(IN MAINS INLET COMPARTMENT): 1
4. SCREWDRIVER FOR ZERO ADJUSTMENT: 1
5. INSTRUCTION MANUAL: 1
6. RS 232 CABLE: 1
7. ANY OPTIONS AS PER CUSTOMER’S ORDER.
IMPORTANT NOTICE !
Immediately upon receipt, the product should be carefully
examined WITHOUT DELAY to ensure that no damage has
occurred in transit. If mechanical or electrical damage is noticed,
the insurance underwriters, the carriers and ourselves must be
notified WITHIN TEN DAYS of receipt of the product. The
insurance underwriters and/or carriers only will entertain claims
for transit damage if this procedure is followed.

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SECTION 1
GENERAL INFORMATION
1.1 Introduction
The Ballantine Model 3207 is a fully portable digital micro-ohm-meter with a 4½ digit LED
display, capable of measuring low resistance with 0.1 micro Ohm resolution. It provides a
RS232 COM PORT for computer interface. It employs the proven 4-wire method where a
fixed DC current is applied to the DUT and the voltage drop across the DUT is measured and
displayed as a proportional resistance reading. This method is used to eliminate the effects
of lead resistance on the accuracy of measurements. It is a highly reliable, powerful
performance and heavy duty instrument. It is a direct reading instrument leading to simple,
speedy and accurate measurements.
1.2 Features
Important features of the micro-ohm meter model 3207 includes:
1. Accuracy: ±(0.5% + .5dgts) for 2 mΩ& ±(0.05% + .5dgts) for other ranges.
2. Pulse Mode operation
3. Digital 4½ digit LED direct reading instrument with0.1μΩ resolution.
4. Operating on 115V, 60Hz AC mains.
5. 4 Wire measurement method to avoid lead resistance.
6. Easy to operate, soft touch keys for range selection.
7. Rugged and Reliable design.
8. Designed for user safety.
9. Long term calibration stability.
10.Computer interface. (RS232 communication port.)
1.3 Applications:
•Resistance measurement of wires, cables, conductor etc.
•Winding resistance measurement of motors, transformers and generators.
•Contact resistance measurement of Relay, contactor, switches and LT switchgear.
•Resistance measurement of welding joints and metallic bonds.
•Resistive component and semiconductor devices etc.

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1.4 Controls, Indicators and Terminals
DESCRIPTION FUNCTION
FRONT PANEL
1. ON/OFF Switch -Switches ON the instrument when pressed.
- Switches OFF the instrument when released.
2. 2,20,200,2000
Range selector switches
Tactile switch (soft touch) used to select
appropriate range and function.
3. TRIG switch To trigger PULSE mode operation.
4. PULSE MODE PULSE mode when LED ON.
CONTINUOUS mode when LED OFF.
5. I+ & I- Output terminals used to send defined current
through the resistance under test.
6. ZERO adjust
ZERO adjust preset, is accessible through the
front panel and is used to zeroing the initial
reading on display.
7. V+ & V- Input terminals used to measure voltage across
the resistance being measured
8. mΩ& ΩIndicating selection of mΩ/Ωfunction
9. OPER/STDBY
OPERATE mode when LED ON.
ZERO adjust mode (STAND BY) when LED
OFF.
10. LED DISPLAY 4 ½ digit LED display.
11. LED (BATTERY OPERATION)
(only for the Option – 05)
OPERATE on BATTERY when LED ON
OPERATE on AC MAIN when LED OFF
REAR PANEL
1. AC Mains Inlet With 250
mA Fuse Receptacle for AC mains input power cable.
2. Input Protection fuse 1A
Fast Blow For protection of the current source.
3. RS 232 Communication Port For computer interface.

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1.5 Optional Accessories Available
No. Test Lead Type Intended Use
1 “C” clamp probe assembly
with 10 meter long lead
To measure resistance of copper wires (having big
diameter), copper bars, copper/ carbon rods etc.
(P/N 85-60198-1)
2 Heavy Duty Bond testing
probe assembly
To measure resistance of copper bars, carbon rods
solid metals etc. (P/N 85-10314-0)
3 Test Lead with Gold Plated
Alligator clip
To measure resistance of transformer winding,
Barrater resistor, contact resistance of relay, LT
switch gear contact resistance. (P/N 85-60288-0)
4 Test lead with Heavy Duty
Alligator clip.
This lead is useful to measure resistance of
transformer winding, coils, motor winding, copper
foils etc. (P/N 85-60199-1)
5 Test Lead with Gold Plated
Kelvin Clip
To measure small size resistors. To measure
resistance of transformer winding, coils, inductors
etc. (P/N 85-60197-0)
1.6 Accessory supplied with Instrument
No. Accessory Intended Use / Part Number
1 RS 232 Cable To interface with computer
2 AC Mains Power Cable P/N 33-10000-0
3 Manual P/N 90-10353-5
For connections refer to the setup diagram in Section 7.

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1.7 OPTIONS
The 3207 Micro-Ohm Meter can be ordered with the following options:
Option Ballantine
Part Number Description
Base unit 3207
Standard Ballantine 3207 Micro-Ohm Meter.
Operates from AC Mains (115VAC or 220VAC as
ordered)
-05 3207-05
Ballantine 3207 Micro-Ohm Meter with Battery Option.
Operates from AC Mains (115VAC or 220VAC as
ordered), or from the internal rechargeable battery
when AC Mains supply is absent.
In this option the instrument has an LED on the front
panel that will be OFF when the unit operates on AC
Mains and will turn ON when the unit operates on
battery (see the Figure 1.7-1). The unit can operate for
minimum 1 hour continuously at 1A before requiring
recharging. To recharge the battery simply connect the
unit to an AC Mains. The battery will fully charge in
approximately 2 hours. Internal circuitry senses the
absence of AC power and will automatically switch to
battery operation.

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Figure 1.7-1 Ballantine 3207-05 Micro-Ohm Meter with Battery Option

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SECTION 2
SAFETY INFORMATION
2.1 Safety requirements
•ALWAYS observe the safety consideration and cautions. Read and understand manual
for operational and safety considerations.
•Always inspect your Micro ohmmeter, test leads, mains cable and accessories for any
sign of damage or abnormality before every use. If any abnormal condition exists (i.e.
broken or damaged test leads, mains cable, cracked case, display not reading etc.) do
not attempt to take any measurements, as this may cause malfunction.
•Never touch exposed wiring, connections, test leads tips or any live circuit conductors
when attempting to make measurements.
2.2 Safety Symbol and Terms:
•Indicates read the Instruction Manual carefully before operating the instrument to
avoid damage to the instrument as well as injury to the operators.
Terms :
•The WARNING heading used in this manual indicates precautions to be followed in order
to avoid injury or fatalities to the person. Always review the associated information very
carefully before performing the indicated procedure.
•The CAUTION heading used in this manual indicates precautions to be followed in order
to avoid injury/ damage to the instrument. Such damage may invalidate the warranty.
•The NOTE heading in this manual states the important information to the user.

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2.3 Warning:-
•Do not operate this instrument in explosive atmosphere (i.e. in the presence of flammable
gases or fumes, vapor dust).
•Ensure the proper grounding of Instrument.
2.4 Caution:
•Use the rated fuse to meet the voltage and current requirements given in the
specification.
•Use only manufacturer supplied typical Leads for typical application as referred in this
manual.
•Always turn off all power from the resistance under test.
•Do not connect the current or voltage leads of the instrument to any carrying source since
this may result in damage to the instrument and void the warranty.
•The instrument should be operated from an AC power source with its neutral at or near
ground (earth) potential. The instrument is not intended for operation from two phases of
a multiphase AC system.

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SECTION 3
PREPARATION OF OPERATION.
3.1 Installation:
The instrument is fully solid state and dissipates minimum heat and no special cooling is
required. However the instrument should not be used where ambient environment is beyond
the temperature limits indicated in the specifications. The instrument is shipped ready for use
as a portable or bench instrument.
Warning !
Do not operate the instrument where inflammable gases are present to avoid fire
hazard.
3.2 Power requirement;
The instrument requires Single Phase 115V, 60Hz AC mains supply with proper grounding.
Warning !
The instrument is provided with a three terminal power cord, which will ground the
case when connected to a three terminal grounding outlet. If a grounding outlet is not
available, an adapter must be used which provides a good grounding connection.
Caution
Use the specified AC mains voltage, otherwise you may damage the instrument and void
the warranty.
3.3 Bench Mounting:
This Instrument is fitted with four rubber feet. It is intended to stand on a bench. The
Instrument is provided with carrying handle which also serve as a tilt-stand to adjust the
viewing angle of the Instrument from the bench level. Refer to fig. 3.1

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FIG 3.1