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Contents

Introduction and Outline Specification

Fitting Your Tacho

2.1

Mounting the Tacho

2.2

Connecting the Tacho

2.3

The Push Button

2.4

Shift Lights

Setting Up Your Tacho

3.1

Using the Push Button

3.2

Number of Cylinders

3.3

Tell-Tale and Other Modes

3.4

Ignition Pulse Filter

3.5

Shift Light Settings

3.6

Resetting the tell-tale.

Installing the Filter Unit

4.1

Purpose

4.2

Fitting

4.3

Commissioning

Troubleshooting

Contents

Introduction and Outline Specification

Fitting Your Tacho

2.1

Mounting the Tacho

2.2

Connecting the Tacho

2.3

The Push Button

2.4

Shift Lights

Setting Up Your Tacho

3.1

Using the Push Button

3.2

Number of Cylinders

3.3

Tell-Tale and Other Modes

3.4

Ignition Pulse Filter

3.5

Shift Light Settings

3.6

Resetting the tell-tale.

Installing the Filter Unit

4.1

Purpose

4.2

Fitting

4.3

Commissioning

Troubleshooting

Содержание RCA50 Series

Страница 1: ...instruments co uk The RCA50 Series of Tachometers Installation and Operating Instructions Revision 6 Farringdon Instruments Limited Unit 9 Oriel Court Omega Park ALTON Hampshire GU34 2YT Telephone 01420 541591 www farringdoninstruments co uk The RCA50 Series of Tachometers Installation and Operating Instructions Revision 6 ...

Страница 2: ...e tell tale 4 Installing the Filter Unit 4 1 Purpose 4 2 Fitting 4 3 Commissioning 5 Troubleshooting Contents 1 Introduction and Outline Specification 2 Fitting Your Tacho 2 1 Mounting the Tacho 2 2 Connecting the Tacho 2 3 The Push Button 2 4 Shift Lights 3 Setting Up Your Tacho 3 1 Using the Push Button 3 2 Number of Cylinders 3 3 Tell Tale and Other Modes 3 4 Ignition Pulse Filter 3 5 Shift Lig...

Страница 3: ... mean Less than 250 mA without shift lights less than 300 mA with shift lights Accuracy 100 rpm or 1 Notes 1 Introduction The Farringdon RCA50 Series of tachometers are believed to be the first available with stepper motor driven main and tell tale hands The tell tale hand is a very useful feature especially when used in its auto reset mode and not just an extra hand to make it look more like hist...

Страница 4: ...lamp may have to be trimmed to accommodate thick dash boards The U clamp is steel but is easy to cut 2 Fitting Your Tachometer 2 1 Mounting the Tachometer The RCA50 tachometer is 80 mm in diameter and the hole in your dash should accept this diameter It will require 60 mm behind the dash to accommodate the depth of the in strument and the clamping studs An O ring is supplied that may reduce vibrat...

Страница 5: ...ale enable Blue Shift Light 2 Output Supplied shift light ONLY Orange Backlighting Lighting 12 volts 2 2 Connecting the Tachometer The tachometer is supplied with flying leads so that you can fit the connector of your choice to the car loom The table lists the functions of the five free wires Wire Colour Function Connect To Black Ground or Earth Ground or Chassis Red 12 volt Supply A fused 12 volt...

Страница 6: ...hift lights are wired correctly Black to black Check RPM settings for Shift Lights 5 Troubleshooting Black and Red Wires Connect the black wire to a good earth point and the red to a suitable switched and fused 12 volt supply A fuse of 1 amp is sufficient The tacho requires a few seconds to power up so connecting it to the master switch is preferable to the ignition supply On powering up the tacho...

Страница 7: ... it will not drive them Orange Wire Connect this to the lighting supply This should be a supply that engine is held at a steady 3000 rpm If the needle is steady try at full speed under load If either needle makes jumps to higher rpm when the engine is running at a constant speed increase the filtering by connecting the trigger wire to the blue instead of the green filter wire If the needles are st...

Страница 8: ...w this is done Try the tacho and check that the nee dles do not jump about or 500 rpm or so when the switches to 12 volts when the lights are on 2 3 The Push Button The push button should be mounted where you can reach it while being able to read the tacho If other people are go ing to drive the car you may wish to put it somewhere hid den so that the tell tale cannot be reset easily The push butt...

Страница 9: ...n ing on the tacho with the button pressed release the button and then press it again for 20 seconds 4 The Filter Unit 4 1 Purpose The Tacho Filter Unit is a simple filter contained in a small plastic box that may be required when using a Farringdon RCA5x Tacho with contact points ignition systems It may be of use with some electronic systems as well Essentially the unit filters the signals taken ...

Страница 10: ...ale hand when in manual mode simply press the push button after the tell tale reading has been shown 3 1 Using the push button Having the tell tale hand makes setting up very easy as the red tell tale hand shows what you are setting up and the white main hand shows the value of the setting The button is used to increase the value of the setting with a quick push to decrease the value with a push o...

Страница 11: ... a 0 to 8000 tacho cylinders Press the button for 20 seconds to start again from the factory setting moves the main needle once every half second in the man ner of the original mechanical chronometric movements This action is switched off after reaching 5000 rpm for 0 to 8 000 and after reaching 6 000 rpm for the 0 to 10 000 and 12 000 versions Once you have adjusted the mode setting hold the push...

Страница 12: ...t this as negative Chronometric Action If this option is selected with settings 4 5 6 or 7 the tacho 3 3 Mode tell tale at 2 The following table shows the value to set for the mode Mode Tell Tale Trigger Pulse Chromometric 0 Auto reset Negative No 1 Manual Negative No 2 Auto reset Positive No 3 Manual Positive No 4 Auto reset Negative Yes 5 Manual Negative Yes 6 Auto Positive Yes 7 Manual Positive...

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