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All these instruments operate on 12 volt vehicle supply, use a BR21 (Power Booster) for other vehicles with 6 - 15 Volts
CLICK for any Brantz fitting problems ? See Brantz trouble shooting below

Item
27
SurvMaster 1 Order Code
BRSM1
Sizes in mm
H100 x W125 x D50
£184.12
Roadway Survey Meters Road Survey Odometers Road Survey Measuring Equipment electronic Road Surveying Equipment

* Survmasters purchased from Don Barrow include a DB 'Tricks of the Trade' & 'Set up Info' sheet - NOT available elsewhere *

Brantz SurvMaster 1

  • Survmaster 1 for accurate Surveying & marking of Roads & Motorways
  • Single Display 4 Digits
  • Large Red LEDs 15mm high
  • Can be set as 9.999, 99.99 or 999.9 - Distances do roll over when 9999. is reached
  • On/Off, Zero, Forward and Reverse buttons
  • Easily set up in Miles or Kilometres to suit any gear ratios or tyres
  • Tip - To safeguard the unit from theft - install the unit using a BR43 Plug Kit
  • Requires a Brantz Sensor

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Item
26
SurvMaster 2 Order Code
BRSM2
Sizes in mm
H100 x W125 x D50
£231.63
Road Survey Meters

* SurvMasters purchased from Don Barrow include a DB 'Tricks of the Trade' & 'Set up Info' sheet - NOT available elsewhere *

Brantz SurvMaster 2

  • Survmaster 2 for accurate Surveying & marking of Roads & Motorways
  • Twin Displays 4 Digits
  • Large Red LEDs 15mm high
  • Can be set as 9.999, 99.99 or 999.9 - Distances do roll over when 9999. are reached
  • On/Off, Zero, Freeze, Forward and Reverse buttons
  • Easily set up in Miles or Kilometres to suit any gear ratios or tyres
  • Tip - To safeguard the unit from theft - install the unit using a BR43 Plug Kit
  • Requires a Brantz Sensor

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Item
25
SurvMaster 3 Order Code
BRSM3
Sizes in mm
H120 x W170 x D50
£337.44
Motorway Survey Meters

* SurvMeters purchased from Don Barrow include a DB 'Tricks of the Trade' & 'Set up Info' sheet - NOT available elsewhere *

Brantz SurvMaster 3 - Very Popular - No download Ports

  • SurvMaster 3 for accurate Surveying & marking of Roads & Motorways
  • Twin Liquid Crystal Displays, Total and Interval Distances
  • Top Display showing a 6 digit readout for precise accuracy
  • Large Digits 15mm high
  • 999.999 Maximum Total Distance
  • 9.999 Maximum Inter Distance
  • Can be operated accurately at speeds of 100 KPH (60MPH)
  • On/Off, Zero, Forward, Reverse, Amend, Freeze and Hold buttons
  • Top and Lower Displays can be Frozen and Unfrozen independently
  • Easily set up in Miles or Kilometres to suit any gear ratios or tyres
  • A 'dream machine' for both Road Surveyors & Rally Route Reconnaissance
  • A truly versatile yet easilly operated piece of equipment
  • Tip - To safeguard the unit from theft - install the unit using a BR43 Plug Kit
  • Requires a Brantz Sensor

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Item
24
SurvMaster 3
+ PC Port
Order Code
BRSM3PC
Sizes in mm
H120 x W170 x D50
£455.64
Survey Meters with PC Port

* SurvMasters purchased from Don Barrow include a DB 'Tricks of the Trade' & 'Set up Info' sheet - NOT available elsewhere *

Brantz SurvMaster 3 - As above with PC Serial Data Communication Port

  • As BRSM above
  • With a PC Communications Port for downloading the data to a Computer
  • 9 Pin 'D' Connector for PC Serial port set at 9600,N,8,1
  • Supports many Serial Comms packages
  • Supplied with a freeware Road Data collection programme
  • Supports many Serial Comms packages, including a freeware Road Data collection programme
  • A 'dream machine' for both Road Surveyors & Rally Route Reconnaissance
  • A truly versatile yet easilly operated piece of equipment
  • Tip - To safeguard the unit from theft - install the unit using a BR43 Plug Kit
  • Requires a Brantz Sensor

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Item
23
Terratrip
202+HR
Order Code
T002HR
Sizes in mm
H75 x W100 x D50
£189.99

Don Barrow -  supplies Terratrip GPS GeoTrip Geo Trip Tripmeters Worldwide
Click to Enlarge
Don Barrow Tripmeters - Buying a Terratrip Tripmeter

Tripmeters purchased from Don Barrow include a DB 'Tricks of the Trade' & 'Set up Info' sheet - NOT available elsewhere *

Accessories for the T202 - See Terratrip Page
Terratrip 202+ V4 High Resolution Tripmeter

  • Twin Distance displays - Inter (9.999) & Total (99.999) & vehicle speed
  • 2 memory calibrations - e.g. for 2 tyre sizes e.g Tarmac & Forest
  • Easily set up in Miles or Kilometres and calibrated to whatever size tyres, ratios etc
  • Facilities include, count up or down, freeze, adjustment, forward & reverse
  • Fitted with a Socket to accept a Drivers Remote Display T016
  • Operates on 12 Volts with backlit display panel
  • Optional RZU (Remote Zero Unit) hand or foot operated
  • HIGH RESOLUTION Model - Measures to 1 Metre for Surveying
  • Requires a Terratrip Sensor - See Terratrip Page

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Item
22
Terratrip
303+HR
Order Code
T003HR
Sizes in mm
H75 x W100 x D50
£244.99

Don Barrow -  supplies Terratrip GPS GeoTrip Geo Trip Tripmeters Worldwide
Click to Enlarge
Don Barrow Tripmeters - Buying a Terratrip Tripmeter

Tripmeters purchased from Don Barrow include a DB 'Tricks of the Trade' & 'Set up Info' sheet - NOT available elsewhere *

Accessories for the T303 - See Terratrip Page
Terratrip 303+ V4 High Resolution Tripmeter

  • Twin Distance displays - Inter (9.999) & Total (99.999) & vehicle speed
  • Inbuilt 24 hour Clock (set to Standard Rally Time)
  • Stopwatch with Average Speed facility
  • 2 memory calibrations - e.g. for 2 tyre sizes e.g Tarmac & Forest
  • Easily set up in Miles or Kilometres and calibrated to whatever size tyres, ratios etc
  • Facilities include, count up or down, freeze, adjustment, forward & reverse
  • Operates on 12 Volts with backlit display panel
  • Optional RZU (Remote Zero Unit) hand or foot operated
  • HIGH RESOLUTION Model - Measures to 1 Metre for Surveying
  • Requires a Terratrip Sensor - See Terratrip Page

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Item
21
Brantz
Sensor Pulse Doubler
Order Code
BR52
Circuit Board
60 x 35 mm
£65.99
Don Barrow - read all about it

Don Barrow supply Brantz Tripmeters Sensors Worldwide

Brantz Sensor Pulse Doubler

  • Fine Tune your Tripmeter - make it more Accurate & Precise to get better results
  • Designed for vehicles which only record under 499 Pulses from the fitted Sensor
  • By fitting inline from the Sensor to the Tripmeter it Doubles the Pulses thus giving you better accuracy
  • Colour coded connectors for easy installation
  • OK for all Brantz Tripmeters

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Item
20
Brantz
Foot Operated Zero Switch
Order Code
BR44F
Sizes in mm
H75 x W80 x D35
£20.99
Brantz Hard-Wired Footwell Remote Zero unit

  • This hard wired Remote, is a push-to-make foot-pedal that can be situated in the footwell
  • For quick Zeroing whilst keeping your hands free
  • Mount in position with B&Q heavy duty velcro
  • OK for all Brantz Tripmeters

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Item
19
Brantz
Sensor Change-Over Switch
Order Code
BR49
Sizes in mm
H70 X W50 X D20
£27.99
Brantz Sensor Change-Over Switch

  • Fitting more than one Sensor
  • The Sensor Selector Change-Over Switch swaps from one Sensor to the other Sensor instantly
  • Quick change-over in the rare event of a Sensor failing
  • Complete with all wiring to connect to two Sensors & Tripmeter
  • Colour coded connectors for easy installation
  • OK for all Brantz Tripmeters

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Item
18
Brantz
Speedo Cable Sensor
Order Code
BR1
Plastic Type £29.99
BR1 - Speedometer Cable Sensor £29.99
Add - SC Brantz BR1 Sensor Clips £3.00

Don Barrow supplies Brantz Trip Meters Sensors Worldwide
Brantz Universal Speedometer Cable Sensor

  • Accepts most Speedometer Cables 3/8" ths (9.5mm)
  • Older vehicles may need reduction ferrules making to accept the larger outer Cable
  • Requires 2 Sensor Clips - See SC below
  • Colour coded connectors for easy installation
  • OK for all Brantz Tripmeters

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Item
17
Sensor Clips Order Code
SC
Metal Type £3.00
Don Barrow supplies Brantz Tripmeters Worldwide
Sensor Clips

  • Fits Brantz BR1 Sensors
  • Pack contains 2 Sensor Clips
  • BR1 requires 2 Sensor Clips

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Item
16
Brantz
Wheel Probe Sensor
Order Code
BR2A
Cable & Probe £29.99
Don't delay - Buy Today
Brantz Probe Sensor M12 x 1mm thread

For use on Brantz Tripmeters made after June 2004, they will NOT drive pre 2004 June Units
Check the Year & Date, Model and Serial number info
Like 09-05-BR7/ 38 ~ meaning (2009-May) - (Model of Tripmeter) / (Meter Production Number that Month)

  • To read front or rear wheel studs or even gearbox output/propshaft u/j studs
  • Pre-wired ready to fit
  • OK for all Brantz Tripmeters made after June 2004

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Item
15
Brantz
M20 Gearbox Sensor
Order Code
BR3
Screw in Type £29.99
Fits most Japanes built vehicles
Brantz M20 x 1.5mm thread, screw into gearbox output, with 'lug' drive

  • Check the gearbox output size and whether 'lug drive' prior to ordering
  • May need minor modifications
  • Fits most Japanese gearbox types
  • Pre-wired ready to fit
  • OK for all Brantz Tripmeters

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Item
14
Brantz
M18 Gearbox Sensor
Order Code
BR4
Screw in Type £36.84
Don't delay - Buy Today
Brantz M18 x 1.5mm thread, screw into gearbox output, with 'square' drive

  • Check the gearbox output size prior to ordering
  • May need minor modifications
  • Fits most Ford/GM/Vauxhall/VW/Skoda/Lada/Fiat
  • Pre-wired ready to fit
  • OK for all Brantz Tripmeters

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Item
13
Brantz
Interface Sensor
Order Code
BR5
Sizes in mm
H15 x W60 x D37
£57.68
Brantz BR5 Electronic Gizmo for cars with electronic speedometers
Brantz Interface Sensor

  • For vehicles with Electronic Speedometers
  • It's like an electronic T piece
  • Ensure that a digital pulse exists at LOW speed before fitting
  • OK for all Brantz Tripmeters

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Item
12
Brantz
Can-Bus Interface Wires
Order Code
BR56
Lead £138.99
Item
11
Brantz
Can-Bus Interface Plug
Order Code
BR57
Lead £138.99
Item
10
Brantz
Can-Bus Interface Plug
Order Code
BR58
Lead £138.99
Don Barrow supply Brantz Tripmeters Sensors Worldwide

Brantz BR56 Can-Bus Sensor connector
BR56 Check Your Vehicle List

Brantz BR57 Can-Bus OBDII Sensor connector Brantz BR58 Can-Bus OBDII Sensor connector
BR57 & BR58 Check Your Vehicle List

Can-Bus Interface
  • Most cars manufactured after 2005 have a CAN-BUS system
  • It's not compatible with all cars - You can Switch to position A or B - View the List to check your vehicle
  • BR57 & BR58 allow you to access the CANBUS system via the OBDII socket
  • Ideal for hire cars or recceing the route in your modern course car
  • BR56 for vehicles with no OBDII socket and only has wiring for connections
  • Clever technology that makes it extremely easy to tap into the vehicle speed pulse
  • This unit comes with a choice of 2 Meter Mounting Kits. Please see below
  • For simplicity of connecting, it is essential to use a BR47
  • The BR57 & BR58 have Female spade connectors - The BR47 has Male connectors
  • OK for all Brantz Tripmeters

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Item
09
Brantz
Can-Bus Extention Lead
Order Code
BR47
Lead £24.88
Don Barrow supply Brantz Tripmeters Sensors Worldwide
Can-Bus 2m Extention Lead

  • 2 Metre Extention Lead for a Brantz BR56 Can-Bus Interface Sensor
  • Ideal for recceing the route in your modern course car
  • OK for all Brantz Tripmeters

Only the cost of Shipping to add - These are the prices you PAY
Item
08
Brantz
Can-Bus Ext Lead with Plug Kit Socket
Order Code
BR45
Lead £24.66
Don Barrow supply Brantz Tripmeters Sensors Worldwide
Can-Bus 2m Extention Lead with a Plug Kit Socket

  • 2 Metre Extention Lead for a Brantz BR57 & BR58 Can-Bus Interface Sensor with BR43 Socket
  • If your Tripmeter is fitted with a BR43 Plug then use this Extention Lead
  • Ideal for hire cars or recceing the route in your modern course car
  • OK for all Brantz Tripmeters

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Item
07
Hall Effect
Sensor
Order Code
BRH2
Sizes in mm
??
£82.76
BH22 Magnets attached to a Driveshaft
Brantz Magnet & Pick Up sensor

  • Only use if the above Sensors cannot be used
  • The Magnets are attached to a revolving shaft / propshaft with the supplied Jubilee type clips
  • The Pick Up is mounted within 15mm of the Magnet
  • Read the instructions FULLY before attempting to fit
  • OK for all Brantz Tripmeters

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Item
06
Brantz
Power Booster
Order Code
BR21
Sizes in mm
H70 x W50 x D25
£40.99
6Volt to 12Volt Step up Unit (Inverter)
Brantz Battery Conditioner

  • Designed specifically for Electronic Tripmeters & Brantz Timers
  • Tripmeters and Timers will malfunction if the Voltage drops below 12 volt
  • Whether your vehicle is between 6 Volt or 15 Volts
  • Your vehicle Voltage output will suffer when extra accessories like
  • Heaters, Wipers, headlights, Spotlights, Map Magnifiers, De-Misters are used
  • Thus dropping the operating Voltage below the minium 12 Volts required
  • The Power Booster provides a constant output of 13.8 Volts x 0.5 (Maximum) Amps
  • It is fully recommended for vehicles with DYNAMO Generators
  • (whether the input is between 5 - 15 Volts) Thus ensuring that no problems occur
  • One BR21 will only feed one Tripmeter or Clock/Stopwatch

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Item
05
Brantz
Plug Kit
Order Code
BR43
Wiring Loom £26.99
Brantz Plug Kit

Wiring Instructions
Brantz - Plug Kit

  • Fit the wiring loom to your car which gives you a Socket to Plug your Tripmeter into
  • This facility allows you to interchange your Tripmeters (Retrotrip or Brantz)
  • Between your vehicles using the Brantz plug in system
  • And enabling their removal for Security purposes
  • Requires an additional Sensor and Plug Kit for each vehicle
  • OK for all Brantz Tripmeters

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Item
04
Spare
Plug & Socket
Order Code
SPS
Spare Plug & Socket £16.00
Spare Plug & Socket to suit Brantz BR43

  • 4 Pin exactly the same as the Brantz BR43

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Item
03
Spare
Plug
Order Code
SP
Spare Plug £10.00
Spare Plug to suit Brantz BR43

  • 4 Pin exactly the same as the Brantz BR43

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Item
02
Spare
Socket
Order Code
SS
Spare Socket £7.50
Spare Socket to suit Brantz BR43

  • 4 Pin exactly the same as the Brantz BR43

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Item
01
Brantz
Sensor Extension Cable
Order Code
BR2X
Wiring Loom £12.54
Brantz Extension Cable
Brantz - Sensor Extension Cable

  • 3 Metre Sensor Extension Cable for (Retrotrip or Brantz)
  • For long vehicles or where the Sensor is located at the rear of the vehicle
  • OK for all Brantz Tripmeters

The Don Barrow 'Code of Practice'

This same 'Code of Practice' applies to users of Survey Meters

Please print this article in your Rally Regulations, so that all Competitors know you are using this system.

All events whether Stage, Road or Regularity Rallies should adhere to a standard 'Code of Practice', so that the Competitor who also uses the same 'Code of Practice' can achieve a far better and accurate result.

    Organisers.
Many Organisers fail to grasp the vital importance of providing an exact 100% (cast iron guaranteed) measured distance for all competitors to set up their Tripmeters. Therefore, certain important rules have to be adhered to, these apply whether your are setting up in Kilometres or Miles.

When measuring an exact known Mile or Kilometre, it is imperative to use an Electronic Tripmeter set up in it's Calculation Mode - so that an exact Distance can be recorded and replicated in pulses per Mile or Kilometre. As an example, if an Electronic Tripmeter in Calculation Mode, records 1997 Pulses to the Mile, as against 01.00 Mile (Normal Running Mode measuring Miles) on the Tripmeter Display - you can clearly see that by setting up your new Test Distance in Calculation Mode, using the known 1997 Pulses, will be more accurate than using 100 units to replicate. Because
at 1997 each measured Pulse = 31.72" (2.64' or .81 Metres)
at 100 each measured 100th of a mile = 633.60" (52.80' or 16.24 Metres)
This shows that an organiser using the Normal Running Mode, could actually proceed beyond the 01.00 Mile displayed on the Tripmeter, by up to 52.79' (16.24 Metres) before the Tripmeter registers 01.01.

Therefore it's imperative to use the Tripmeter in Calculation Mode. Get this wrong - especially on Regularity events and you will have a lot of disgruntled competitors to contend with. It's just as easy to get it right, as it is to get it wrong!

Imagine a Competitor setting up their Electronic Tripmeter exactly to the Organisers set Measured Mile, which is incorporating an error, and then competing on a Regularity Section of 50 Miles in length. Their Timing would be 'way out' let alone having to adjust the Distances in the Road Book to suit all the Junctions etc.

      Important Notes
  • It's no use quoting the measured Distance Starts opposite the telephone box, this is not accurate enough
  • Or that it's at a white marker post in the grass verge, these can be moved by locals or other competitors
  • Although you may be breaking the law, paint the road with a White Line or Dot exactly at the Start and Finish
  • Obviously remove immediately after the event or paint over
  • Or use a permanent roadside fixture to another permanent roadside fixture, irrespective of the Distance
  • If the above Test Distance given is 1.750, ÷ your Trip Readout by 1.750 to give your Trip switch set up
  • Once set, all other Course Cars should set their Tripmeters in Calculation Mode to this Distance
  • And every time any Course Car carries out further surveys on the Route
  • The longer the Test, maybe 2 or 3 Miles, the better the accuracy
  • Ideally the test should be on a straight piece of road
  • However if not
  • Use a racing line on your side of the Road at all times
  • Obey ALL road Markings, especially at T Junctions and X Roads etc
  • Specify which approach lane and directions to use at Roundabouts
  • If using a circular circuit
  • Use anti - clockwise for driving on the LH side of the road (UK) - Use clockwise for RH Countries
  • This ensures the defined route and measured distance is adherred to more closely
  • Use a permanent roadside fixture in a lay-by and back to the same fixture, irrespective of the Distance
  • If the Test Distance is 7.780, ÷ your Trip Readout by 7.780 to give your Trip switch set up per 01.00 Mls / Klms
    1. Route info
  • All Secret Timing Points should be sited exactly at the pre-measured Control Points, mark if possible as above
  • When making a Road Book, simply record the Total Distances only at Junctions/Controls etc
  • By using a DB Tulip Road Book Editor disc, all Inter Distances are automatically generated
    1. Competitors
  • At the Start of every event, always set up your Tripmeter in Calculation Mode to measure the Test Distance
  • Keep a log of all your known Pulse Settings
  • Pay special attention when measuring the Test Distance
  • Don't be satisfied with your first run, always treble check
  • Follow all the above Important Points and you will soon improve your skills

Copyright - Don Barrow - 2002 - This article may be re-produced in it's entirety only with a Credit to Don Barrow.

Brantz - Trouble Shooting

Ensure that both the Positive + and Negative - Power Cables to the Tripmeter are supplied Direct from the vehicle Battery with an inline fuse. Always ensure that ALL cables are positioned well clear of wiring looms, distibutors, coils or any other electrical equipment, etc, otherwise they may pick up interference signals which may 'step' or 'freeze' the Tripmeter Displays.

Sensors
Here again keep ALL wires clear of wiring looms and any electrical equipment, BR1 Sensors are colour coded and should not present any problems. Inner speedometer cables must be a tight fit in the Sensor disc, never increase the disc hole size it depends upon this tight fit to rotate the sensor disc.

BR3 & BR4 Gearbox Sensors
Different coloured wires are used, however these are the general wiring rules for the Tripmeter Brantz Grey cable.
GREEN to GREEN/YELLOW -:- BLUE to BLUE -:- BROWN to BROWN -:- However some Sensors have a different colour coding and should be wired as follows GREEN/YELLOW to BLACK or SILVER -:- BROWN to RED -:- BLUE to WHITE.

BR2 Wheel Sensors
In the Grey Cable from the Tripmeter, do not use the BROWN wire, wire as follows, BLUE to BROWN (sensor)-:- GREEN to BLUE (sensor).

Fault-Finding Procedures for Brantz Products:

Issue July 2000. Not for general circulation. If a tripmeter installation is giving trouble, the recommended way to find faults is by progressively removing areas of the installation so that there is an obvious point at which things are either good or bad. The most important split is the one most resisted by customers as it's inconvenient. Take the customer's car out of the equation by fitting the tripmeter into another car. Often it is not necessary to fit the sensor in the replacement car; simply connect up to the new car's power supply and observe all the tripmeter functions which do not need the distance increments. If the opportunity presents itself, a sensor can be connected to the new car tripmeter installation without the sensor being fitted to the vehicle in a permanent way (ie just placed loose inside the car and operated by hand). Only after the above should the following become necessary. Brantz may be able to offer advice about typical car problems, but it is ultimately the car owner's responsibility to have a car with normal trouble-free electrics.

International 1 / International 2 / International 2'S' /Architect 1 / Architect 2 / Laser3/ Surveymaster

1) The meter is installed in a customer's vehicle. The meter digits light up correctly when the meter's ON/OFF switch is switched ON--GOTO4. The meter digits light up incompletely when the meter's ON/OFF switch is switched ON--GOTO13. The meter digits do not light up when the meter's ON/OFF switch is switched ON--GOTO2.

2)Disconnect the Black Power Cable coming from the base of the meter from the vehicle's supply and connect it directly to a spare charged 12 volt battery placed in the vehicle next to the meter. Observe that it is the Black cable which connects to power; Brown to +12 volts, Green/Yellow to -12 volts. Battery chargers are not a suitable power supply as they are not smoothed. There is normally a Blue wire in the Black cable. This Blue wire is not normally connected to anything. If the meter digits light up, find the problem with the vehicle's supply. Often the polarities are reversed or of poor quality. Use Screw-type connections and definitely NOT crimps. If the meter does not light up--GOTO3.

3) Check that the cables (Black and Grey) are not fractured or cut-into by bodywork. Disconnect the sensor from the Grey cable. If the meter lights up--GOTO12. If the meter does not light up--GOTO13.

4) The problem is that on the road the meter digits flash on and off--GOTO2 and 3. The problem is that the digits zero themselves from time to time GOTO3 and 7. The problem is that the digits increment themselves even when the vehicle is standing still--GOTO7. The problem is that the digits do not increment when the vehicle is travelling--GOTO5. The problem is that the meter does read distance but not accurately--too low GOTO5, too high GOTO6.

5) The meter is not seeing all of the pulses from the sensor. This could mean that the sensor is not functioning or that the meter's pulse input is damaged. Connect the negative of a voltmeter to the Green/Yellow wire inside the Grey cable (The sensor Cable). Test the Brown of the Grey cable with the other positive voltmeter lead and see that +5 volts is present. If it is not GOTO13. If it is +5 volts then test the Blue lead in the Grey cable. This lead should go up and down in voltage as the sensor is rotated (or if a wheel type sensor its' end is touched repeatedly by a steel object. When the Blue wire is in the Low state its' voltage should be less than 2 volts. When the Blue wire is in the High state, its' voltage should be over 4 volts. Note that the meter requires that either state has to be present for more than 2 milliseconds to recognise it, (this can be a problem if the customer is using a wheel type sensor to sense on a drive shaft which rotates very quickly. The answer here is to use a larger target). If the voltage does go up and down sufficiently--GOTO6. If the voltage does not go up and down--GOTO12.

6) The meter is receiving external pulses of energy from interference sources--GOTO7 or the sensor is not reliably detecting rotation--GOTO5 and if a wheel type sensor check for correct gaps on all detected targets and also check that socket head screws are not being detected. Check wheel sensor operation with a voltmeter whilst it is connected to the tripmeter. Voltages should be about 4.0v when sensor is near to metal and about 2.0 volts when not near metal. Remember that gaps can alter whilst the vehicle is being driven due to vehicle parts bending and flexing.

7) Test for interference. This is particularly common when home-made HT sparkplug leads have been used, but can come from damaged alternators or fuel pumps/horn/wipers etc. If interference is present it is always too powerful to defend against and should be fixed at source by suppressors or new silicon leads etc. Take a portable radio, select the AM band (important) and tune into a quiet spot between stations. Turn up the volume and start the vehicle. Listen for loud clicks. That's interference. Compare the vehicle with a normal road car as a guide to what is acceptable. Try other vehicle accessories to locate intermittent sources of trouble.

8)&12) The sensor is damaged. Replace and install new unit with best chance of survival against heat and shock etc. Use first class connections.

13) The meter's internal circuit is damaged so the meter and sensor must be returned to the factory for service or replacement. Installation tips: On receipt of a tripmeter test it on the bench with a charged battery (NOT a battery charger as the current is not smoothed) and its' sensor connected. Before installing into a vehicle, do the vehicle interference checks as in 7) and operate other car accessories to see if any of them produce interference type clicks etc.. Always derive 12volt power AND the ground lead DIRECTLY from the two battery TERMINALS. Use screw connections (NEVER use crimp connections. These are almost always loose and account for the vast majority of unreliable customer installations). Support cables at terminal entry points to prevent them from pulling on connectors.

Retrotrip 2 and Retrotrip 3

Carefully read the TROUBLESHOOTING documents to reduce to a minimum the shortcomings of the old technology which is the basis of the retrospective design. Testing a RetroTrip on the workshop bench. DEALER INFORMATION. (NOT) FOR RELEASE TO CUSTOMER. May 2000. Connect the power cable (black sheath) to a 12 volt battery, brown to +12 volts, green/yellow to -12 volts. Note that testing can not be done reliably when connected to a battery charger, as the current is not smoothed. If the Retrotrip has customer-installed connectors, especially crimp types, push & pull these gently, then firmly, to check tightness. Solder them in place wherever possible.

Test (1) Switch on the Retrotrip. Observe the top lights go on. Switch off.

Test (2) (Optional test for dealers with Brantz test equipment. Others go straight to test 3) Put the Retrotrip calibration switches (some may be pen-push types) to 555. Connect the grey cable to a Brantz 'Rolling Road Tester' taking care to connect the right colours. Zero the two readouts. Switch on the Retrotrip. Note the two counters click over together. Change the calibration figures (there is a limit as to how fast the counters can go, so the calibration figure cannot be too low. Switch off the Retrotrip. Remove the 'Rolling Road Tester'.

Test (3) Connect a sensor to the grey cable carefully observing the colour codes (see the sensor information sheet). Select a low calibration figure. Switch on the Retrotrip. Rotate the sensor mechanism (or for a wheel sensor touch a steel object onto the tip of the sensor many times). See the counters click over. SELF TEST FACILITY FOR MORE RECENT MODELS (May 1999 onwards): Connect the Retrotrip to a charged battery supply (sensor is not needed). Put the rotary calibration switches to 000. Turn on the power. Note the readouts take half a step. Within eight seconds of turning the power on, change the calibration switches to 888. After a few seconds the counters will start to self-step themselves in groups of eight for as long as the power remains connected. This enables the simulation of great distances on the bench. If all the above functions are correct then any problem is likely to be with the car and/or the installation. See the trouble-shooting tips on the sensor sheet and MOST IMPORTANTLY - try the meter on another car. Derive power directly from the battery TERMINALS not the chassis or fuse panel. This is the single most important installation recommendation, and it is the one most resisted by customers as it is frequently inconvenient. Low battery voltage at the trip will cause trouble (see recommended power conditioner below).

Popular problems are: Reversed power, loose crimp type connectors, even more loose connectors, battery under voltage, poor quality wiring with still more loose connectors, and earthing derived from chassis instead of battery, radio interference from HT/pumps/horn/wipers/dynamo/ alternator etc. See sensor sheet for a very simple interference test.

N.B. PREVENT VIBRATION!!! - Excessive vibration can cause one counter to disagree with the other. Remember that the counter technology of the Retrotrip is necessarily over fifty years old and today's expectation of perfect performance is a little harder to achieve. Older cars with 6 volt electrics or poorly performing or less reliably performing 12 volts charger systems should use a BRANTZ POWER CONDITIONER which will always produce a correct voltage source for the Retrotrip. Detailed operating and installation information is available on www.brantz.co.uk

How can I measure a roadway accurately, how can I measure a motorway precisely, how can I mark out a road in miles or kilometres, how can I set out a motorway in kilometres or miles, how can I survey a motorway accurately, how do I survey the road network system precisely. I need a digital readout, display, electronic meter to measure roads, roadways, dual carriageways, motorways in metres or meters or miles.

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Email - Don Barrow


Motoring News Rally Champion 1963 ~ 1964 ~ 1967 ~ 1970 RAC Rally Champion 1967
BTRDA Gold Star Rally Champion 1970 BTRDA Silver Star Rally Champion 1962 ~ 1963 ~ 1967

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Don Barrow the 'King of the Navigators' [Eric Bailey - Motoring Correspondent - The Daily Telegraph 16/12/95]

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