Polar Electro Toneohm 550A Operator'S Manual Download Page 1

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Polar Instruments Ltd.
Garenne Park
Rue de la Cache
St. Sampson
Guernsey
Channel Islands
GY2 4AF
England

Fax: 44 (0)1481 52476

MAN 149-9603

TONEOHM 550A

OPERATOR

MANUAL

Summary of Contents for Toneohm 550A

Page 1: ...Polar Instruments Ltd Garenne Park Rue de la Cache St Sampson Guernsey Channel Islands GY2 4AF England Fax 44 0 1481 52476 MAN 149 9603 TONEOHM 550A OPERATOR MANUAL...

Page 2: ......

Page 3: ...and service in accordance with instructions of POLAR INSTRUMENTS LTD and not having been altered in any way or subject to misuse negligence or damage and not having been repaired or attempted to be r...

Page 4: ...equirements of EC Council Directive 89 336 EEC on the approximation of the laws of the Member States relating to electromagnetic compatibility A declaration of conformity with the requirements of the...

Page 5: ...onnected to an outlet with an effective protective conductor terminal earth Do not negate this protective action by using an extension cord without a protective conductor Note This instrument is fitte...

Page 6: ...se instructions for later use The TONEOHM 550A is designed for use indoors in an electrical workshop environment at a stable work station comprising a bench or similar work surface Use only the access...

Page 7: ...hey stay sharp If they are used on anything other than PCBs or solder joints take care not to press them too hard or they may snap ENVIRONMENTAL OPERATING CONDITIONS The instrument is designed for ind...

Page 8: ...V max Probe Protection Momentary contact to 100V Display 0 7 3 digit Liquid Crystal Display Tone Internal speaker headphone socket adjustable volume Power Cord Detachable Power Requirements 230V 10 11...

Page 9: ...dard Accessories Probe set ACC152 Operator manual MAN149 SYMBOLS CAUTION To prevent damage to this product and to ensure its safe use observe the specifications given in this manual when connecting to...

Page 10: ...SHORTS LOCATOR 1 1 1 1 Introduction to the TONEOHM 550A 1 1 1 2 Areas of application 1 1 SECTION 2 GENERAL DESCRIPTION 2 1 PRINCIPLES OF OPERATION 2 1 2 1 Locating short circuits 2 1 2 2 TONEOHM 550A...

Page 11: ...STEM OPERATION 4 1 4 1 Locating short circuits 4 1 4 2 Using headphones 4 2 Short location example 4 3 SECTION 5 SIMPLE MAINTENANCE AND CLEANING 5 1 Cleaning 5 1 Technical Support 5 1 USER GUIDE FRENC...

Page 12: ...thout the need to disconnect associated components or wiring The sensitivity of the TONEOHM 550A allows it to be used for a wide variety of applications requiring low resistance measurements Continuit...

Page 13: ...e hairline bridges between tracks may be hidden beneath components or even buried below the surface of the board Using the TONEOHM 550A the technician can locate a short circuit between two tracks of...

Page 14: ...to gain more sensitivity and resolution Use the 200 20K ranges for general resistance measurements When using the milliohmmeter ranges the open circuit probe tip voltage is limited to a maximum of 60m...

Page 15: ...e the Needle Probes across PCB tracks to locate short circuits between the tracks 2 4 Rear Panel controls and connectors The rear panel accommodates the push button push on push off ON OFF mains power...

Page 16: ...of its new location before applying power 3 2 Connecting the TONEOHM 550A to a power supply Refer to the voltage label on the rear panel of the instrument and make sure that the marked rating is suita...

Page 17: ...wn live blue neutral green yellow earth ground United States black live white neutral green ground Check that the TONEOHM 550A mains switch on the rear panel is OFF Plug the power cable into the recep...

Page 18: ...g the probe in a direction that produces a higher frequency tone and thus a lower reading increasing the sensitivity as necessary At the point of maximum tone frequency and minimum meter reading the p...

Page 19: ...l fault situation is shown diagramatically in Fig 4 1 4 2 Using headphones The TONEOHM 550A incorporates the facility to output the audio tone to headphones if preferred When the headphones are connec...

Page 20: ...a lower reading and a higher tone This indicates that the probe has moved closer to the short Moving the probe from B to C gives a higher reading and a lower tone indicating that the probe has moved...

Page 21: ...Manual to assist the service technician Cleaning Clean the TONEOHM 550A with a cloth lightly moistened with water with a small amount of mild detergent Alternatively a cloth lightly moistened with al...

Page 22: ...surata a questa variazione corrisponde una variazione della frequenza del tono emesso Il puntale deve essere spostato lungo la pista sino a che il tono raggiunge il livello piu elevato questa e la pos...

Page 23: ...zione del corto circuito Se la frequenza del tono diminuisce significa che ci stiamo allontanando dal corto circuito Procedere con la movimentazione del puntale nella direzione che produce la frequenz...

Page 24: ...ale da A a B otteniamo una misura inferiore e un tono maggiore Questo significa che ci stiamo muovendo nella direzione del corto circuito Muovendo il puntale da B a C otteniamo una lettura superiore e...

Page 25: ...ist Anschlu des TONEOHM 550A an die Netzversorgung Vergewissern Sie sich ob die auf der Ger ter ckseite aufgedruckte Netzspannung mit der lokalen Netzversorgung bereinstimmt berpr fen Sie ob der Netzs...

Page 26: ...n die Richtung der ansteigenden Tonh he zu bewegen und erh hen Sie bei Bedarf die Empfindlichkeit Am Punkt der h chsten Tonh he und des geringsten Anzeigewerts sollten die Pr fspitzen nur mehr einige...

Page 27: ...rd der angezeigte Wert kleiner der Ton wird h her Dies bedeutet die Spitze wurde zum Kurzschlu punkt hin bewegt Wird die Spitze weiter von B nach C bewegt so steigt der angezeigte Wert an der Ton wird...

Page 28: ...ong the track until the tone reaches its highest pitch which is the position of the short Connecting the TONEOHM 550A to a power supply Refer to the voltage label on the rear panel of the instrument a...

Page 29: ...the probes in a direction that produces a higher frequency tone and thus a lower reading increasing the sensitivity as necessary At the point of highest pitch and minimum meter reading the probes shou...

Page 30: ...gives a lower reading and a higher tone This indicates that the probe has moved closer to the short Moving the probe from B to C gives a higher reading and a lower tone indicating that the probe has...

Page 31: ...e long de la piste jusqu ce que l on atteigne le son le plus aigu indiquant le point de court circuit Branchement du TONEOHM 550A au secteur V rifier que la tension d alimentation secteur indiqu e l a...

Page 32: ...e sonore indique que l on se rapproche du d faut et sa diminution indique que l on s loigne Continuer se d placer dans la direction qui produit un son aigu Le court circuit se trouve au point qui donn...

Page 33: ...e de touche de A vers B le signal sonore augmente en fr quence et la valeur affich e diminue Cela indique un rapprochement vers le point de court circuit Le d placement de B C donne un signal sonore p...

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