background image

 

JAWS

BATTERY COVER

ON / OFF & RANGE
SELECTOR SWITCH

ON / OFF & LOW

BATTERY INDICATING LED

ZERO BUTTON

BATTERY COVER

RELEASE SCREW

(UNDERNEATH)

1.0 INTRODUCTION 

The  Snap-on  Low  Amp  Current  Probe  measures  AC  or 
DC  current  with  digital  multimeters,  oscilloscopes,  and 
other  suitable  recording  instruments.  The  probe 
provides  accurate  and  reliable  non-intrusive  testing  of 
ignition  coils,  injectors,  fuel  pumps,  relays,  electric 
motors,  and  parasitic  draw.  The  jaws  of  the  probe  are 
designed with a built in hook feature to help isolate wires 
(refer to Figure 1). 

Using advanced Hall Effect technology, the Snap-on Low 
Amp Probe accurately measures currents from 10 mA to 
60  Amps  with  a  resolution  of  1mA  over  the  frequency 
range of DC to 50 kHz. The probe has two scales, 0 to 
20  Amps  and  0  to  60  Amps.  The  Snap-on  Low  Amp 
Current Probe outputs an analog voltage based on current 
flow  through  the  circuit.  The  output  is  millivolts  AC  or 
DC. For example, in the 0 to 20-Amp range, the probe 
output is 100 mV per 1 Amp. In the 0 to 60-Amp range, 
the probe output is 10 mV per 1 Amp. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 1 

Содержание EETA308D

Страница 1: ...Low Amp Probe EETA308D Reference Manual ...

Страница 2: ......

Страница 3: ...e instrument is suspected WARNING Risk of electrical shock This product is intended for Measurement Category I for example automotive 12V systems Do not use it for Measurement Categories II III and IV Measurement Category I is for measurements performed on circuits not directly connected to MAINS or MAINS circuits an example of MAINS circuit is 120VAC or 240VAC household or industrial circuits Do ...

Страница 4: ...Y Safety Standards BSEN61010 1 2001 BSEN61010 2 032 2002 BSEN61010 031 2002 150 VRMS Category I Rated Transient Overvoltage 800V Pollution Degree 2 EMC Standards BSEN 61326 2 2 2006 1998 FCC Part 15 Class B ...

Страница 5: ...nd Electronic Equipment according to the EU directive 2002 96 EC WARNING Read instruction manual and safety messages before using product Double Reinforced Insulation To avoid electric shock use caution during installation and use of this product High voltages and currents may be present in circuit under test Read all instructions completely before using this product ...

Страница 6: ...Low Amp Probe EETA308D Reference Manual March 2011 ...

Страница 7: ...ssistance in all other markets contact your selling agent The information specifications and illustrations in this manual are based on the latest information available at the time of publication The manufacturer reserves the right to make equipment changes at any time without notice 2011 Snap on Incorporated ...

Страница 8: ...nstructions 4 3 1 Connecting the Probe 4 3 2 Switch on 4 3 3 Low Amp Current Probe Zero Adjustment 4 3 4 Error Factor 4 3 5 Reading the mV Scale 5 3 6 Current Measurement Applications 5 4 0 Current Probe Characteristics 10 5 0 Battery Replacement 11 6 0 Cleaning 12 7 0 Warranty 13 8 0 Declaration of Conformity 14 ...

Страница 9: ...tic draw The jaws of the probe are designed with a built in hook feature to help isolate wires refer to Figure 1 Using advanced Hall Effect technology the Snap on Low Amp Probe accurately measures currents from 10 mA to 60 Amps with a resolution of 1mA over the frequency range of DC to 50 kHz The probe has two scales 0 to 20 Amps and 0 to 60 Amps The Snap on Low Amp Current Probe outputs an analog...

Страница 10: ...ng Frequency range DC to 50kHz 3dB Temperature coefficient 0 1 of reading C Power supply 9V Alkaline PP3 MN1604 50 Hours low battery indicator Working voltage see Safety Standards section 150V AC RMS or DC 2 2 General Data Maximum conductor size 12mm diameter Output connection 4mm safety plugs Output zero Auto zero via push button Cable length 1 5 meters Operating temperature range 0 to 50 C 32 to...

Страница 11: ...l conditions To adjust the output voltage to zero 1 Ensure that the probe is away from the current carrying conductor 2 Connect the Low Amp Current Probe to your instrument and select the voltage scale to view the reading 3 Turn the Low Amp Current Probe on by using the On Off and Range Selector switch to select the 20A or 60A scale Press the Zero button 3 4 Error Factor Current probes work by rea...

Страница 12: ...ctor switch to select the 20A setting 2 Perform the Low Amp Current Probe Zero Adjustment procedure refer to section 3 3 Test To measure parasitic draw 1 Clamp the Low Amp Current Probe jaws around the B supply wire to the power distribution box or to the positive or negative battery cable The parasitic draw readings display 2 If a negative reading displays open the probe jaws and clamp the probe ...

Страница 13: ...ach pump independently To measure fuel pump current 1 Clamp the Low Amp Current Probe jaws around the fuel pump voltage supply circuit near the fuel tank or at the fuel pump relay 2 Verify that the probe jaws are fully closed The fuel pump current readings display 3 If a negative waveform displays open the probe jaws and clamp the probe in the opposite direction Humps in the waveform represent the...

Страница 14: ...say if in our example that the time measurement of the 8 humps is 12 ms we would divide 60 000 by 12 to get 5000 RPM To measure amperage measure the average voltage of the waveform and use 100 mV 1A for calculation 3 6 3 Ignition Coil Current Measurement Recommended Probe Setting 20A Note Before taking measurements or clamping the probe jaws around any wire complete the Setup steps below Setup 1 U...

Страница 15: ...heck the ignition coil current at the fuse box if applicable To check the ignition coil current at the fuse box 1 Locate fuse box and remove the ignition or DIS fuse s 2 Install an inline fuse harness in place of the fuse 3 Clamp the Low Amp Current Probe around the inline fuse harness 3 6 4 Injector Current Measurement Recommended Probe Setting 20A Note Before taking measurements or clamping the ...

Страница 16: ...e 3 Clamp the Low Amp Current Probe around the inline fuse harness On sequential fuel injected vehicles each waveform represents current flow through one injector On bank fired injectors each waveform represents current flow through the injector bank The injector waveform should have a gradual rise or ramp as the current begins to flow through the injector or the injector bank Current flow through...

Страница 17: ... 00 0 01 0 1 1 10 100 Frequency kHz Attenuation dB Typical Linearity in 20A Range 2000 1500 1000 500 0 500 1000 1500 2000 20 15 10 5 0 5 10 15 20 Input Current A Output Voltage mV Typical Linearity in 60A Range 600 400 200 0 200 400 600 60 40 20 0 20 40 60 Input Current A Output Votage mV ...

Страница 18: ...urrent Probe will invalidate your warranty To replace the battery 1 Unclamp the probe from the conductor 2 Using the On Off and Range Selector switch turn the Low Amp probe off 3 Disconnect the output leads from external equipment 4 Loosen the captive screw that secures the battery cover 5 Lift the cover through 30 and pull it clear of the probe body as shown in Figure 9 The battery is then access...

Страница 19: ...12 6 0 CLEANING Clean the case periodically by wiping it with a damp cloth and detergent Do not use abrasive cleaners or solvents Do not immerse the probe in liquids ...

Страница 20: ...d service or use after the tool is significantly worn Consumable products are not covered by any warranty Consumable products are goods reasonably expected to be used up or damaged during use including but not limited to filters ribbons printer paper gases oxygen sensors batteries and air conditioning leak detector tips SNAP ON SHALL NOT BE LIABLE FOR ANY INCIDENTAL SPECIAL OR CONSEQUENTIAL COST O...

Страница 21: ...14 8 0 DECLARATION OF CONFORMITY ...

Страница 22: ...NOTES 15 ...

Страница 23: ...NOTES 16 ...

Страница 24: ......

Страница 25: ...ZEETA308D Printed 11 03 Snap on Kenosha WI 53141 1410 ...

Отзывы: