Vanguard Instruments DigiTMR S2 User manual

DigiTMR S2TM
DIGITAL CIRCUIT BREAKER ANALYZER
USER’S MANUAL
Vanguard Instruments Company, Inc.
1520 S. Hellman Ave.
Ontario, California 91761, USA
TEL: [phone]
FAX: [phone]
July 2012
Revision 1

DIGITMR S2 USER’S MANUAL REV 1
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SAFETY SUMMARY
FOLLOW EXACT OPERATING PROCEDURES
Any deviation from the procedures described in this User’s Manual may create one or more
safety hazards, may damage the DigiTMR S2, or cause errors in the test results. Vanguard
Instruments Company, Inc. assumes no liability for unsafe or improper use of the DigiTMR S2.
All safety precautions provided in this manual must be observed during all phases of testing
including test preparation, test lead connection, actual testing, and test lead disconnection.
SAFETY WARNING AND CAUTIONS
The DigiTMR S2 shall be used only by trained operators. When using the DigiTMR S2 in Time-
versus-Travel mode, all circuit breakers under test shall be off-line and fully isolated.
DO NOT MODIFY TEST EQUIPMENT
To avoid the risk of introducing additional or unknown hazards, do not install substitute parts or
perform any unauthorized modification to any DigiTMR S2 test unit. To ensure that all designed
safety features are maintained, it is highly recommended that repairs be performed only by
Vanguard Instruments Company factory personnel or by an authorized repair service provider.
Unauthorized modifications can cause safety hazards and will void the manufacturer’s
warranty.
WARNING
Do not remove test leads during a test. Failure to heed this warning can result in damage to the
equipment.

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TABLE OF CONTENTS
CONVENTIONS USED IN THIS DOCUMENT ..................................................................................... 1
1.0 INTRODUCTION.................................................................................................................... 2
1.1 General Description and Features ................................................................................... 2
1.2 Operational Modes .......................................................................................................... 5
1.2.1. “On-Line” Mode ....................................................................................................... 5
1.2.2. Time-versus-Travel Circuit Breaker Analyzer Mode................................................. 5
1.3 Technical Specifications ................................................................................................... 6
1.4 DigiTMR S2 Controls and Indicators ................................................................................ 7
2.0 PRE-TEST SETUP ................................................................................................................... 8
2.1 Operating Voltages .......................................................................................................... 8
2.2 LCD Screen Contrast Control............................................................................................ 8
2.3 Printer Paper Control....................................................................................................... 8
2.4 Printer Paper.................................................................................................................... 8
3.0 OPERATING PROCEDURES ................................................................................................. 10
3.1 Configuring the VCBA S2 Software for use with the DigiTMR S2 .................................. 10
3.2 Connecting the DigiTMR S2 to a PC via Bluetooth ........................................................ 12
3.3 DigiTMR S2 Cable Connections ...................................................................................... 20
3.3.1. Contact Cable Connections .................................................................................... 20
3.3.2. Initiate Cable Connections ..................................................................................... 21
3.3.3. Analog and Digital Voltage Monitor Connections.................................................. 23
3.3.5. AC Current Sensor Connection............................................................................... 26
3.3.6. Transducer Connections......................................................................................... 27
3.4 General Procedures and Configuration ......................................................................... 30
3.4.1. Setting the Interface Language .............................................................................. 31
3.4.2. Setting the Measurement Units............................................................................. 33
3.4.3. Setting the DigiTMR S2’s Internal Clock ................................................................. 36
3.4.4. Entering Test Record Header Information ............................................................. 38
3.4.5. Setting the Frequency ............................................................................................ 41
3.4.6. Setting the Default Printing Mode ......................................................................... 43
3.5 Timing Breakers in On-line Mode .................................................................................. 45
3.6 Timing Breakers in Time-Travel Mode........................................................................... 45
3.7 Performing Timing Tests ................................................................................................ 46
3.7.1. Timing an OPEN Operation With No Insertion Resistors ....................................... 46
3.7.2. Timing an OPEN Operation WITH Insertion Resistors............................................ 50
3.7.3. Timing a CLOSE-OPEN Operation Using Contact Channel #1................................. 53
3.7.4. Timing an OPEN-CLOSE-OPEN Operation............................................................... 56
3.8 Performing Diagnostic Tests .......................................................................................... 59
3.8.1. Performing a Slow-Close Test................................................................................. 59
3.8.2. Performing a Transducer Self-Test......................................................................... 62
3.8.3. Checking Cable Hookups ........................................................................................ 63
3.9 Printing Test Results ...................................................................................................... 65

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TABLE OF CONTENTS (continued)
3.9.1. Printing the Tabulated Test Results ....................................................................... 65
3.9.2. Printing the Graphic Test Results ........................................................................... 69
3.10 Working with Timing Shots............................................................................................ 75
3.10.1. Saving Timing Shots................................................................................................ 75
3.10.2. Printing a Timing Shot Directory ............................................................................ 78
3.10.3. Restoring a Test Shot.............................................................................................. 81
3.10.4. Erasing Timing Shots .............................................................................................. 84
3.10.5. Copying Test Shots to a USB Flash Drive................................................................ 89
3.11 Working with Breaker Test Plans................................................................................... 91
3.11.1. Recalling a Breaker Test Plan ................................................................................. 92
3.11.2. Printing a Breaker Test Plan ................................................................................... 94
3.11.3. Printing the Breaker Test Plan Directory................................................................ 96
3.12 Setting Up Analysis Points.............................................................................................. 98
3.12.1. Setting Up the OPEN Analysis Points ..................................................................... 98
3.12.2. Setting Up the CLOSE Analysis Points .................................................................. 102
4.0 GLOSSARY OF TERMS....................................................................................................... 104
5.0 DIGITMR S2 TROUBLE-SHOOTING GUIDE........................................................................ 105
LIST OF TABLES
Table 1. DigiTMR S2 Technical Specifications................................................................................. 6
Table 2. Descriptions of Tabulated Test Results Elements ........................................................... 68
LIST OF FIGURES
Figure 1. DigiTMR S2 Controls and Indicators ................................................................................ 7
Figure 2. Contact Cable Connections............................................................................................ 20
Figure 3. DC Trip and DC Close Initiate Circuit Cable Connections............................................... 21
Figure 4. DC Trip and AC Close Initiate Circuit Cable Connections............................................... 22
Figure 5. Analog and Digital Voltage Monitoring Cable Connections .......................................... 23
Figure 6. External Trigger Cable Connection for an Open Connection......................................... 24
Figure 7. External Trigger on a Close Operation Less 52Y Delay Time ......................................... 25
Figure 8. Typical CT Connection.................................................................................................... 26
Figure 9. Typical Transducer Connection...................................................................................... 27
Figure 10. Typical Resistor Type Transducer Connection............................................................. 28
Figure 11. Vanguard Resistor Transducer Adapter Connected to an ABB AHMB Transducer ..... 28
Figure 12. Vanguard Doble Transducer Adapter Connected to a Doble Linear Transducer ........ 29
Figure 13. Vanguard Doble Transducer Adapter Connected to a Doble Rotary Transducer ....... 29
Figure 14. DigiTMR S2 General Operating Procedures................................................................. 30
Figure 15. Typical "Slow-Close" Test Results Printout.................................................................. 61

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LIST OF FIGURES (continued)
Figure 16. Typical Tabulated Test Results Printout of an OPEN Operation.................................. 67
Figure 17. Typical Graphic Test Results Printout .......................................................................... 71
Figure 18. Expansion Graph from 0 to 200 ms ............................................................................. 72
Figure 19. Graphic Interpretation of an OPEN Timing Shot ......................................................... 73
Figure 20. Graphic Interpretation of a CLOSE Timing Shot........................................................... 73
Figure 21. Graphic Interpretations of OPEN-CLOSE and CLOSE-OPEN Timing Shots ................... 74
Figure 22. Typical Thumb Drive Shot Directory Printout.............................................................. 80
Figure 23. Typical Internal Shot Directory Printout ...................................................................... 80
Figure 24. Typical Test Plan Printout ............................................................................................ 95
Figure 25. Typical Test Plan Directory Printout ............................................................................ 97
Figure 26. Linear Transducer on an OCB .................................................................................... 113
Figure 27. Rotary Transducer on Alstom HE 1014 Circuit Breaker............................................. 113
Figure 28. Rotary Transducer on ABB HMB Mech...................................................................... 114
Figure 29. Westinghouse SFA Transducer Installation ............................................................... 114
Figure 30. ABB 72PM Circuit Breaker with Linear Transducer and Special Timing Rod............. 115
Figure 31. Rotary Transducer on Megna Blast Breaker .............................................................. 115
Figure 32. Rotary Transducer on Federal Pacific Breaker........................................................... 116
Figure 33. Linear Transducer on Mitsubishi 500-SFMT .............................................................. 116
Figure 34. Linear Transducer on Areva DT1-72.5F ..................................................................... 117
APPENDIX
Appendix A. ITE Circuit Breaker Model 14.4K Timing Chart ....................................................... 107
Appendix B. DigiTMR S2 Test Plan for ITE Circuit Breaker Model 14.4K .................................... 108
Appendix C. DigiTMR S2 Timing Chart for ITE Circuit Breaker Model 14.4K .............................. 109
Appendix D. DigiTMR S2 Timing Chart for ITE Circuit Breaker Model 14.4K.............................. 110
Appendix E. Timing Chart and Plan for Siemens Type SPS2, 121 Circuit Breaker ...................... 111
Appendix F. DigiTMR S2 Compatible Transducers and Transducer Adapters ............................ 112

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CONVENTIONS USED IN THIS DOCUMENT
This document uses the following conventions:
•A key or switch on the DigiTMR S2 is indicated as [KEY].
•Menu options are referenced as (MENU OPTION).
•Screen and menu names are referenced as “SCREEN/MENU NAME”.
•The terms “test record” and “test shot” are used interchangeably.
•DigiTMR S2 LCD screen output is shown as:
•When instructions are provided, the menu item that should be selected is shown in bold as
shown below (option 5 should be selected):
•Warning messages are indicated as:
WARNING
Warning message
•Important notes are indicated as:
NOTE
Note details
1. OPTION 1
2. OPTION 2
3. OPTION 3
4. OPTION 4
5. OPTION 5
1. OPTION 1
2. OPTION 2
3. OPTION 3
4. OPTION 4
5. OPTION 5

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1.0 INTRODUCTION
1.1 General Description and Features
The Vanguard DigiTMR S2 is an inexpensive, easy to use digital circuit breaker analyzer. The
DigiTMR S2 can be operated stand-alone or can be computer-controlled. It can fully analyze a
circuit-breaker’s performance by testing the contact time, stroke, velocity, over-travel, and
contact wipe. Contact and motion analysis can be performed for all breaker contact operations
(Open, Close, Open – Close, Close – Open, and Open – Close – Open). Timing results are
recorded and displayed on the 240 x 128 pixels back-lit LCD screen and can also be printed on
the built-in 4.5" wide thermal printer.
“On-Line” Timing Mode
In addition to the conventional off-line timing mode, the DigiTMR S2 also offers an optional
“on-line” timing mode. In this mode, the DigiTMR S2 captures the breaker’s trip or close time,
the trip/close coil current “fingerprint,” and the battery supply voltage while the breaker is still
in service. The trip/close time is derived from the time of trip, or close coil initiation, to the
breaker’s bushing current breaker-make as detected by an AC clamp-on current sensing probe.
The “on-line” timing mode can detect a breaker’s operating conditions with little or no down
time. In this mode, the first trip operation time of the breaker is captured. If a breaker has been
in service for a long period of time and sitting in close position, the first trip time of the breaker
may be slow possibly due to a sticky mechanism. The “on-line” mode is very useful in such
cases because traditional breaker timing may not detect this condition since several operations
may have occurred before the first timing test is conducted.
Diagnostic Capabilities
The DigiTMR S2 can perform diagnostics on its internal electronics. Diagnostics can be
performed to verify contact cable connections and to test the travel transducer's electronics.
Open/Close Coil Current Monitoring
A built-in Hall-Effect current sensor records the circuit breaker’s operating coil current
amplitude and duration. The circuit breakers’ operating-coil waveforms (effectively, a
performance “fingerprint” or “current profile”) can be used as a diagnostic tool for analyzing a
circuit breaker’s performance.
Internal Test Record and Test Plan Storage
The DigiTMR S2 can store up to 200 test records and 100 circuit breaker test plans in Flash
EEPROM. A test plan comprises of all circuit breaker performance specifications (Stroke,
Velocity, and Contact Time). When a test plan is used, the DigiTMR S2 compares the test results
for the circuit breaker against its performance to generate a “Pass/Fail” report.
Test plans are generated using the included Windows®-based Circuit Breaker Analysis
application. Test plans can be transferred to the DigiTMR S2 via the USB or optional Bluetooth
interface, or by using an external USB Flash drive. Up to 999 test records and 999 test plans can
be stored on an external USB Flash drive.

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Contact Timing Inputs
Dry-contact input channels are used for timing circuit-breaker contacts. Each contact input
channel can detect main contact and insertion-resistor contact times in milliseconds and cycles.
Three contact timing channels are available on the DigiTMR S2.
Breaker Stroke and Velocity
One digital transducer input channel is available to measure circuit breaker contact stroke,
velocity, over-travel, and bounce-back. With the use of a Vanguard digital travel transducer, no
set-up calibration is required before testing. A special feature is also available to “Slow-Close”
test a circuit breaker and obtain test results. An optional Resistor Transducer Adapter Device
can be used to interface with any resistor transducer.
In Time Travel Mode, the digital transducer measures the breaker stroke, over-travel, bounce
back, contact wipe, and contact velocity. Breaker contact velocity calculations are based upon a
contact’s travel distance over a period of time, which is defined by the manufacturer’s
specifications. The DigiTMR S2 not only calculates simple distance-over-time velocities, but also
supports other formulas. An example is a Siemens SPS2 breaker velocity calculation formula
shown below:
V = 12.2 x a/b
The formula and analysis points can be stored in a test plan for later use in the field. Please see
section 3.11 for further information about test plans.
NOTE
If a breaker test plan is used during testing, test results are compared with the
specifications in the test plan, and a “Pass” or “Fail” indicator is printed on the test
report based on the results of this comparison.
CT Input
One non-contact AC current sensor is used to monitor circuit breaker on-line current for the
“on-line” timing mode.
Voltage Monitoring Input
One analog input channel, designated as (V1), is dedicated to monitoring the substation DC
supply or coil voltage (0-255 Volts, DC or peak AC). A second voltage input channel, designated
as V2, is dedicated to detecting voltage On/Off status (presence or absence). This input can be
used to monitor the status of an A/B switch.
Circuit Breaker Initiate Feature
A built-in solid-state initiate device is used to operate the circuit breaker from the DigiTMR S2.
Operational modes include Open, Close, Open-Close, Close-Open, and Open-Close-Open.
Multiple operations such as Open-Close, Close-Open, and Open-Close-Open can be initiated
using a programmable delay or by sensing the circuit breaker’s contact condition. The circuit
breaker coil current amplitudes and waveforms are recorded and can be printed on the thermal
printer.

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Computer Interface
One USB interface port and one optional Bluetooth interface is available for computer-control.
Vanguard's Windows®- based Circuit Breaker Analyzer application is included with each
DigiTMR S2. The software can be used to control the unit, review test records, and create circuit
breaker test plans. Test records can be exported to PDF, Excel, and XML format. All future
software updates can be downloaded from the Vanguard web site at no additional charge.
User Interface
The DigiTMR features a back-lit (256 x 128 pixels) graphic LCD screen to display menus and test
results. A convenient, rugged, 44-key QWERTY-style keypad is used to control the unit and
enter data.
Built-in Thermal Printer
The DigiTMR S2 features a built-in 4.5” wide thermal printer that can print test results in both
tabulated and graphic format.

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1.2 Operational Modes
1.2.1. “On-Line” Mode
In “On-Line” mode, the trip/close time is derived from the time of trip, or close-coil initiation, to
the breaker’s bushing current-break-or-make as detected by an AC clamp-on current sensing
probe. The DigiTMR can time a circuit breaker’s OPEN operation by sensing the time when the
OPEN coil is energized until the bushing CT current returns to zero. The breaker’s CLOSE time is
detected when the close coil is energized until the bushing CT current is detected. The “On-Line”
mode provides a quick way to diagnose a breaker’s performance and can reduce maintenance
costs.
1.2.2. Time-versus-Travel Circuit Breaker Analyzer Mode
In Time-versus-Travel mode, the DigiTMR S2 applies a test voltage of 35 Vdc to each of the
contact channels, thus allowing an analog to digital converter (A/D) to determine a close, open,
or an insertion resistor as the state of the contact. The DigiTMR S2 records into memory 20,000
readings (in on second) from the A/D’s and the transducer position counters. The contact time,
circuit breaker stroke and velocity are then derived from the stored data.
NOTE
The DigiTMR S2’s travel transducer employs optical encoders to send quadrature
signals to the unit’s counters. With the use of digital transducers and counters, the
need to setup or calibrate the transducers is eliminated.

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1.3 Technical Specifications
Table 1. DigiTMR S2 Technical Specifications
TYPE Circuit-breaker analyzer
PHYSICAL SPECIFICATIONS 18.5"W x 14"H x 7"D (47.0 cm x 35.7cm x 17.6 cm); Weight: 20 lbs (9.1 kg)
INPUT POWER 3 Amps, 100 – 240 Vac, 50/60 Hz
DRY-CONTACT INPUTS 3 dry-contact channels; each channel detects main contact and insertion resistor
contact
TIMING WINDOWS 1 second, 10 seconds, or 20 seconds
TIMING RESOLUTIONS ±50 micro-seconds @ 1 sec. duration,
±500 micro-seconds @ 10 sec. duration,
±1.0 milliseconds @ 20 sec. duration
TIMING ACCURACY 0.05% of reading ±0.05 milliseconds @ 1 second duration
DRY-CONTACT DETECTION
RANGE
Closed: less than 20 ohms; Open: greater than 10,000 Ohms
RESISTOR DETECTION RANGE 50 – 5,000 ohms
TRIGGER INPUT VOLTAGE Open/Close: 30 – 300 V, DC or peak AC
VOLTAGE SENSING INPUT RANGE V1: analog input; 0 – 255V, DC or peak AC; Sensitivity: ±1V
V2: voltage presence/absence detector input; 30 – 300V, DC or peak AC
BREAKER OPERATIONS Initiate Open, Close, Open – Close, Close – Open, Open – Close – Open
BREAKER INITIATE CAPACITY 30A, 250 Vac/dc max
INITIATE CURRENT READING
RANGE
One, non-contact, Hall-effect sensor, 0 – 20 amp range, dc to 5Khz
DIGITAL TRAVEL TRANSDUCER
INPUT
1 digital travel transducer channel; linear range: 0.0 – 60.0 in (±0.005 in) rotary
range: 0 – 360 degrees (±0.006 degrees)
CONTACT TRAVEL POINT
DIFFERENCE
Measures “slow-close” contact-point distances; results can be printed
CT CURRENT SENSOR One, non-contact, 0¬100A
DISPLAY Back-lit LCD screen (240 x 128 pixels); viewable in bright sunlight and low light
levels
PRINTER Built-in 4.5-inch wide thermal printer can print both graphic contact travel waveforms
and tabulated test results
INTERNAL TEST RECORD
STORAGE
Stores up to 200 test records and 100 test plans
COMPUTER INTERFACES One USB port, optional Bluetooth interface
PC SOFTWARE Windows®-based Circuit Breaker Analysis software (VCBA S2) included with
purchase price. Software updates available at
no additional charge
SAFETY Designed to meet UL/IEC 61010 and CAN/CSA C22.2 No. 1010.1-92 standards
ENVIRONMENT Operating: -10°C to 50° C (15°F to +122° F); Storage: -30° C to 70° C (-22°F to
+158° F)
HUMIDITY 90% RH @ 40°C (104°F) non-condensing
ALTITUDE 2,000 m (6,562 ft) to full safety specifications
CABLES Furnished with full set of test leads (including 20-foot contact leads and 30-foot
contact lead extensions)
OPTIONS transportation case (available for the DIGITMR S2 and travel transducers)
WARRANTY One year on parts and labor
NOTE
The above specifications are valid at nominal operating voltage and at a
temperature of 25°C (77°F). Specifications may change without prior notice.

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1.4 DigiTMR S2 Controls and Indicators
The DigiTMR S2’s controls and indicators are shown in Figure 1 below. The purpose of the
controls and indicators may seem obvious, but users should become familiar with them before
using the DigiTMR S2. Accidental misuse of the controls will usually cause no serious harm.
Users should also be familiar with the safety summary found on the front page of this User’s
Manual.
Figure 1. DigiTMR S2 Controls and Indicators

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2.0 PRE-TEST SETUP
2.1 Operating Voltages
The DigiTMR S2 operates on voltages between 100-240 Vac, 50/60 Hz.
2.2 LCD Screen Contrast Control
To increase the LCD screen contrast, press and hold the [∧]key for two seconds.
To decrease the LCD screen contrast, press and hold the [∨] key for two seconds.
2.3 Printer Paper Control
To advance the DigiTMR S2’s printer paper, press and release the [∧] key.
To retract the DigiTMR S2’s printer paper, press and release the [∨] key.
2.4 Printer Paper
The DigiTMR S2’s built-in thermal printer uses 4.5-inch wide thermal paper for printing test
results. To maintain the highest print quality and to avoid paper jams, the use of thermal paper
supplied by Vanguard Instruments Company is highly recommended. Additional paper can be
ordered from the following sources:
Vanguard Instruments Co, Inc.
1520 S. Hellman Avenue
Ontario, CA 91761
Tel: [phone]
Fax: [phone]
Part Number: VIC TP-4 paper
BG Instrument Co.
13607 E. Trent Avenue
Spokane, WA 99216
Tel: [phone]
Fax: [phone]
Part Number: VIC TP-4 paper

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2.5 Replacing the Thermal Printer Paper
The roll of thermal paper is housed inside a dispenser underneath the printer cover. To replace
the paper, follow the steps below:
•Unscrew the two large printer cover screws and remove the printer cover.
•Remove the leftover thermal paper roll from the paper holder.
•Unroll the new thermal paper roll.
•Feed the thermal paper into the slot between the paper pocket and the rubber roller.
The printer will automatically pull the paper under the thermal head.
•Place the paper roll into the paper holder.
•Lift the thermal head and align the thermal paper if necessary.
•Re-install the printer cover.
NOTE
Thermal paper has a chemical coating on one side of the paper. This side should be
facing the thermal print head. Incorrect paper loading may result in blank output on
the thermal paper.
The thermal paper will show a red stripe to indicate that the roll is about to run out
of paper.

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3.0 OPERATING PROCEDURES
3.1 Configuring the VCBA S2 Software for use with the DigiTMR S2
The DigiTMR S2 can be used with a PC (computer control mode) using the Vanguard Circuit
Breaker Analyzer Series 2 (VCBA S2) software. From the PC, the user can time circuit breakers,
retrieve test records, and create and transfer test plans to the DigiTMR S2. Follow the steps
below to properly connect the DigiTMR S2 and configure the VCBA S2 application to recognize
the unit.
a. Install the VCBA S2 software (please see the VCBA S2 software user’s manual for details)
b. Connect the DigiTMR S2 to the PC by connecting a USB cable from an open USB port on
the PC to the unit’s “USB PC” port.
c. Turn on the power on the DigiTMR S2.
d. If this is the first time you are connecting the unit to the PC, Windows will recognize it as
a new device and automatically install necessary drivers. If using Windows XP, you may
be prompted to install drivers. Select the automatic installation option and Windows will
locate the generic drivers necessary.
e. Please note that although the unit is connected via USB, it uses an internal serial
interface to communicate with the PC. As such, it will appear in the windows Device
Manager as a USB Serial Port. Open the Device Manager from the Windows Control
Panel and note the COM port number. For example, in the installation shown below, the
DigiTMR S2 is shown as COM10 (USB Serial Port).

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f. Launch the VCBA S2 application. From the “Sys-Config” menu, select “System Setup…”.
The following window will be displayed:
Make sure that the “Enable USB” option is UN-checked. Then, from the “Port” drop-
down menu, select the COM port that corresponds to the port that the DigiTMR S2 is
connected to. Then click the OK button. The VCBA S2 software will now recognize the
DigiTMR S2.

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3.2 Connecting the DigiTMR S2 to a PC via Bluetooth
The DigiTMR S2 can also be connected wirelessly to a PC using Bluetooth. To connect the unit
via Bluetooth, it must first be paired with the PC. Follow the steps below to pair the DigiTMR S2
to a PC via Bluetooth:
For Windows XP:
a. Make sure the DigiTMR S2 is turned on. Then double click on the Bluetooth system tray
icon (on the bottom right corner of your computer screen):
b. The “My Bluetooth Places” window will be displayed:
Click on “Add a Bluetooth Device” on the left window pane.
c. The Bluetooth Setup Wizard window will be displayed. Click on the “Next” button. The
PC will scan for nearby devices and list all available Bluetooth devices:

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The DigiTMR S2 will be listed as “DigiTmr S/N” where S/N is the device’s serial number.
Click on the icon for the DigiTMR and then click on the “Next” button.
d. The following window will be displayed asking for a secret key to connect to the
DigiTMR S2:
Type the word “default” (without the quotes and in all lower-case) and then click on the
“Next” button.
e. The following window will be displayed with the option to connect to the DigiTMR S2 as
a serial port:
Make sure to check the box next to “AT Serial” and then click on the “Next” button.
f. The following confirmation screen will be displayed:

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Click on the “Finish” button.
g. The DigiTMR S2 will now be displayed in the “My Bluetooth Places” window:
Note the port number listed under the device name. In the above case, the port number
is COM14. Follow the directions in section Error! Reference source not found. to
configure the VCBA S2 software to connect to the DigiTMR S2 using this COM port.

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For Windows 7:
a. Make sure the DigiTMR S2 is turned on. Then double click on the Bluetooth system tray
icon (on the bottom right corner of your computer screen):
b. The “Bluetooth Devices” window will be displayed:
Click on “Add a device”.