Maintenance – Sealey TA302 User Manual
Page 4
4.13.
temperature measurements
4.13.1. Insert the type K thermocouple plug into the negative “COM” terminal and the positive terminal ensuring the + symbol on the plug is inserted into the
positive + terminal and the negative symbol on the plug is inserted into the negative “COM” terminal.
4.13.2. Turn the rotary switch to the select °C or °F.
4.13.3. Read the temperature on the display.
4.14.
rPm (tACH) measurements
4.14.1. Select the RPM range with the rotary switch.
4.14.2. Select the X10 RPM range with the rotary switch. Multiply the displayed reading times by 10 to get the actual RPM.
4.14.3. Press the RPM Mode button (fig.1.4) to select through RPM 4 for 4-stroke or RPM 2 for 2-stroke DIS.
note: rPm4 for rPm of 4-stroke engines which have 1 ignition on every 4 engine strokes.
rPm2 for rPm of dis (distributerless ignition system) & 2-stroke engines which have 1 ignition on every 2 engine strokes.
4.14.4. Insert the inductive pick-up leads into the meter. Black lead into the negative “COM” terminal and the red lead into the positive RPM terminal.
4.14.5. Connect the inductive pick-up to a spark plug HT lead. If no reading is received, unhook the clamp, turn it over and connect again.
note: Connect the pick-up as far away from the distributor and exhaust manifold as possible.
Position the pickup to within six inches of the spark plug or move it to another plug HT lead if no reading or an erratic reading is obtained.
The inductive pick-up has an adjustable sensitivity switch that may also be used to correct an unstable reading.
4.15.
dwell Angle measurement
Dwell angle is the number of degrees through which the distributor cam rotates while the breaker points are closed.
4.15.1. Insert the black test probe into the negative “COM” terminal and the red test probe into the positive “V” terminal.
4.15.2. Turn the rotary switch to the DWELL position.
4.15.3. Set number of cylinders with the DWELL button (fig.1.3).
4.15.4. Connect the black test probe to the Ground terminal (-) on the vehicle battery and the red test probe to the contact breaker points or the negative (-)
terminal of the ignition coil.
4.15.5. When the engine is started the Dwell angle will be displayed.
note: To reduce the dwell angle reading the points gap must be increased, to increase the dwell angle the points gap must be reduced.
Refer to your owners handbook for detailed procedures for dwell settings and adjustments.
5. mAintenAnCe
WArning! do not attempt to repair or service your meter unless you are qualified to do so and have the relevant calibration, performance test,
and service information. To avoid electrical shock or damage to the meter do not get water inside the case.
5.1.
replacing the Battery
WArning! to avoid electric shock, disconnect the test probes from any source of voltage before removing the battery door.
5.1.1. When the battery becomes exhausted or drops below the operating voltage, will appear in the right hand side of the display. Replace the battery.
5.1.2. Disconnect the leads from the meter.
5.1.3. Open the battery door by loosening the screws using a Phillip’s screwdriver.
5.1.4. Remove the old battery and insert the new one, observing the correct polarity.
5.1.5. Replace the battery cover and secure with the two screws.
WArning! to avoid electric shock, do not operate the meter until the battery cover is secured in place.
5.2.
replacing the fuses
WArning! to avoid electric shock, disconnect the test probes from any source of voltage before accessing the fuses.
5.2.1. Open the battery door by loosening the screws using a Phillip’s screwdriver. Remove the battery.
5.2.2. Remove the six screws around the back of the meter using a Phillip’s screwdriver.
5.2.3. Gently part the casing then remove the blown fuse. Be carefull not to damage the PCB.
5.2.4
Install the new fuse into its holder. Join the casing back together and secure with screws.
note: Always use a fuse of the correct size and value.
0.5A/250V fast blow for the 320mA range.
20A/250V fast blow for the 20A range.
5.2.5. Replace the battery and cover and secure with the screws.
WArning! to avoid electric shock, do not use the meter until it has been fully re-assembled.
5.3.
Periodically wipe the case with a damp cloth and mild detergent. Do not use solvents.
5.4.
Turn the meter off when not in use and remove the battery if stored for a long period of time.
5.5.
Do not store the meter in a place of high humidity or high temperature.
NOTE: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior notice.
imPortAnt: no liability is accepted for incorrect use of this product.
WArrAnty: Guarantee is 12 months from purchase date, proof of which will be required for any claim.
informAtion: For a copy of our latest catalogue and promotions call us on 01284 757525 and leave your full name and address, including postcode.
sole uK distributor, sealey group,
Kempson Way, Suffolk Business Park
,
Bury St. Edmunds, Suffolk,
IP32 7AR
Original Language Version
TA302 Issue: 2 - 20/12/11
01284 757500
01284 703534
www.sealey.co.uk
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environmental Protection.
Recycle unwanted materials instead of disposing of them as waste.
All tools, accessories and packaging should be sorted, taken to a recycle centre and disposed of in a manner which is compatible
with the environment.
When the product is no longer required, it must be disposed of in an environmentally protective way. Contact your local solid waste
authority for recycling information.
Battery removal.
WArning! To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery door.
Disconnect the test leads from the meter.
•
See Section 5.1 for battery removal.
Dispose of batteries according to local authority guidelines.
under the Waste Batteries and Accumulators Regulations 2009, Jack Sealey Ltd are required to inform potential purchasers of products
containing batteries (as defined within these regulations), that they are registered with Valpak’s registered compliance scheme.
Jack Sealey Ltd’s Batteries Producer Registration number (BPRn) is BPRn00705