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UT107
Operating Manual
62 pgs1.11 Mb0

UNI-T UT107 Operating Manual

Table of Contents Title Page
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Model UT107: OPERATING MANUAL
Title Page
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Model UT107: OPERATING MANUAL
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E. Battery Power Consumption Testing when the Engine Is off F. Trigger Voltage Battery Load Testing G. Voltage Drop Testing H. Charging System Voltage Testing I. Ignition System Testing
1. Ignition Coil Testing
2. Ignition System High Voltage Damper Testing
3. Hall Switch/Sensor Testing
4. Magnetic Resistance Sensor
5. RPMx10 Testing
6. Fuel System Testing J. Engine Sensor Testing
1. Oxygen Sensor
2. Temperature Sensor
3. Position Sensor
4. Absolute Pressure (MAP) and Baro Sensor
5. Mass Air Flow (MAF) Sensor General Specifications Accurate Specifications A. DC Voltage B. AC Voltage C. DC Current D. Resistance E. Diode F. Continuity T esting G. 12V Battery H. Temperature I. Frequency J. Duty Cycle K. Dwell Testing L. Tach (Rotation Speed) Testing Maintenance A. General Services B. Replacing the Fuses C. Replacing the Battery
Overview
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Model UT107: OPERATING MANUAL
This Operating Manual covers information on safety and cautions. Please read the relevant information carefully and observe all the Warnings and Notes strictly.
Warning
To avoid electric shock or personal injury, read the “Safety Information” and “Rules for Safe Operation” carefully before using the Meter.
Automotive Digital Multimeter Model UT107 (hereafter referred to as “the Meter”) is a 1999 counts, 3-1/2 digits manual ranging meter. Spotting a unique design with an extra large LCD display , Connect Test Leads display , full overload protection and unique outlook design. For this reason, it emerges as an electric meter with more outstanding performance for safer operation than other meters. In addition to the Dwell, Tach and Data Hold feature, the Meter can be used to test the AC voltage, DC voltage, DC current, resistance, temperature, battery , duty cycle, frequency, diode and continuity.
This Meter complies with standards IEC61010: in pollution degree 2, overvoltage category (CAT. II 1000V, CAT. III 600V) and double insulation.
CA T.II: Local level, appliance, PORTABLE EQUIPMENT etc., with smaller transient overvoltages than CAT. III
CAT.III: Distribution level, fixed installation, with smaller transient overvoltages than CAT. IV
Use the Meter only as specified in this operating manual, otherwise the protection provided by the Meter may be impaired.
International electrical symbols used on the Meter and in this Operating Manual are explained on page 9.
Unpacking Inspection
In the event you find any missing or damage, please contact your dealer immediately.
Open the package case and take out the Meter. Check the following items carefully to see any missing or damaged part:
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Item
Description
Qty
Model UT107: OPERATING MANUAL
English Operating Manual Test Lead Point Contact Temperature Probe Holster 9V Battery (NEDA 1604, 6F22 or 006P)
1 piece 1 pair 1 piece 1 piece 1 piece
1 2 3 4 5
Safety Information
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Model UT107: OPERATING MANUAL
Rules For Safe Operation
Warning
To avoid possible electric shock or personal injury, and to avoid possible damage to the Meter or to the equipment under test, adhere to the following rules:
Before using the Meter inspect the case. Do not use the Meter if it is damaged or the case (or part of the case) is removed. Look for cracks or missing plastic. Pay attention to the insulation around the connectors. Inspect the test leads for damaged insulation or exposed metal. Check the test leads for continuity . Replace damaged test leads with identical model number or electrical specifications before using the Meter. When using the test leads, keep your fingers behind the finger guards. Do not apply more than the rated voltage, as marked on the Meter, between the terminals or between any terminal and grounding. To avoid harm to yourselves, never attempt to input an effective voltage over 60V in DC or 30V in AC. Use the proper terminals, function, and range for your measurements. The rotary switch should be placed in the right position and no any changeover of range shall be made during measurement is conducted to prevent damage of the Meter. Disconnect circuit power and discharge all high­voltage capacitors before testing, resistance, diodes or continuity. Before measuring current, check the fuse is ok. Before connecting the Meter in serial to the tested in-circuit, disconnect in-circuit power.
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Model UT107: OPERATING MANUAL
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If the value of current to be measured is unknown, use the maximum measurement position, and reduce the range step by step until a satisfactory reading is obtained Replace the battery as soon as the battery indicator appears. With a low battery, the Meter might produce false readings that can lead to electric show and personal injury. When servicing the Meter, use only the same model number or identical electrical specifications replacement parts. The internal circuit of the Meter shall not be altered at will to avoid damage of the Meter and any accident. Soft cloth and mild detergent should be used to clean the surface of the Meter when servicing. No abrasive and solvent should be used to prevent the surface of the Meter from corrosion, damage and accident. Turn off the Meter when it is not in use and take out the battery when not using for a long time. Constantly check the battery as it may leak when it has been using for some time, replace the battery as soon as leaking appears. A leaking battery will damage the Meter. Do not use or store the Meter in an environment of high temperature, humidity, explosive, inflammable and strong magnetic field. The performance of the Meter may deteriorate after dampened. The Meter is suitable for indoor use.
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Model UT107: OPERATING MANUAL
Automotive Servicing Safety Guide
Warning As some automobiles are installed with safety air bags, you must pay attention to the cautions in the automotive servicing manual when you are working around the components and wiring of the air bags, or any carelessness will open an air bag, resulting in some personal injury. Note that the air bag will also be opened for a few minutes after the ignition lock is closed (or even when the automotive battery is cut off), which is driven by the special energy reserve.
Wear protective eyeglasses which meet safety requirements. Operate the automobile in a well-ventilated place so as to prevent the inhalation of any toxic tail gas. Keep your own tools and testing instruments far from all the heater components of the operating engine. Ensure that the automobile has stopped (automatic transmission) or put into neutral gear (manual transmission) and be sure that it is equipped with brakes and the wheels have been locked. Do not place any tool on the automotive battery which will cause a short circuit of the electrodes and in turn lead to any personal injury or damage to a tool or battery . Smoking or striking a light near the automobile is prohibited. Pay attention to ignition coil, an ignition lead or a spark plug socket because these components are provided with high voltages when the automobile is operating. T o connect or cut off an electronic component, close the ignition lock. Pay attention to the automotive producer’s cautions, notes and servicing procedures.
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To prevent an accident from causing any personal injury or any damage to an automobile or any of its meters, please read the following safety guidelines and testing procedure in earnest:
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Model UT107: OPERATING MANUAL
A. The data of the automotive servicing manual have
originated from the automotive servicing information.
Contact the local distributors of automotive components. Contact the local retailers of automotive components. Contact the local libraries to look up any book for the proofreading of your automotive servicing manual so as to provide you with the latest information.
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B. Before the diagnosis of any trouble, open the
engine hood to make a thorough visual inspection. Y ou will find the causes for many of your problems to be solved, which will save you a lot of time.
Has the automobile recently been serviced? Has the same problem sometimes occurred where the trouble lies? Do not try to find any short cut. Check the hoses and leads where it is probably very difficult to find out where any trouble lies. Check any trouble with the air purifier or pipeline system. Check any damage to any sensor or the driving gear. Check the ignition lead: any breakage of any terminal, crack on any spark plug or breakage at the insulation of the ignition lead. Check all the vacuum hoses: any right line, shrinkage, bend, crack, fracture or damage. Check the leads: any connection of sharp edges, connection of hot surfaces (such as exhaust manifold), shrinkage, burn or scratch at the insulation or right line connection. Check circuit connections: any pin corrosion, bend or damage, inappropriate connection position or damaged electrode lead.
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All the information, explanations and detailed descriptions in the operation manual have originated from the industrial information recently published. It is impossible to prove the accuracy and completeness of the information, of which we shall not be responsible for the assumption.
International Electrical Symbols
AC (Alternating Current). DC (Direct Current) Grounding. Double Insulated. Deficiency of Built-In Battery. Fuse. Warning. Refer to the Operating Manual. Conforms to Standards of European Union.
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Model UT107: OPERATING MANUAL
The Meter Structure (see figure 1)
1. LCD display 2.Data Hold button
3. Rotary Switch 4. Input Terminals
5. Power button
(figure 1)
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Model UT107: OPERATING MANUAL
Rotary Switch
Rotary Switch
Position
Function
V
kHz
0
C
A
DWELL RPM x 10
DC Voltage Measurement. AC Voltage Measurement. Resistance Measurement. Diode Test. Continuity Test, Unit: DC Current Measurement. Battery Measurement Temperature Measurement, Unit: 0C Frequency Measurement, Unit: Kilohertz Duty Cycle Measurement Automotive ignition dwell testing, Unit: degree Automotive engine tach testing (Displayed Reading x 10), Unit: rpm
Functional Buttons
Button
Operation Performed
POWER
HOLD
Turn the power on and off. Press HOLD once to enter hold mode. Press HOLD again to exit hold mode and the present value is shown. In Hold mode, is displayed
12V
Duty%
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Model UT107: OPERATING MANUAL
Below table indicated for information about the rotary switch positions.
Below table indicated for information about the functional button operations.
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Display Symbols (see figure 2)
The battery is low.
Warning: To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator appears.
Indicates negative reading. Test of diode. Continuity test. Date hold is active. Indicator of connecting test leads into different input terminals.
( figure 2)
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Model UT107: OPERATING MANUAL
1
2 3 4 5 6
Connect
test leads
V
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Model UT107: OPERATING MANUAL
Measurement Operation Part 1 Multimeter Basic Testing
A. DC Voltage Testing (see figure 3)
( figure 3)
Warning T o avoid harms to you or damages to the Meter from
electric shock, please do not attempt to measure voltages higher than 1000Vp although readings may be obtained.
Please take extra care when measuring high voltages to avoid electric shock.
Insert the red test lead into the V terminal and the black test lead into the COM terminal. Set the rotary switch to an appropriate measurement position in . Connect the test leads across with the object being measured. The measured value shows on the display.
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The DC voltage ranges are: 200mV, 2V, 20V, 200V and 1000V.
To measure DC voltage, connect the Meter as follows:
Note
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Model UT107: OPERATING MANUAL
If the value of voltage to be measured is unknown, use the maximum measurement position (1000V) and reduce the range step by step until a satisfactory reading is obtained. The LCD displays “1” indicating the existing selected range is overloaded, it is required to select a higher range in order to obtain a correct reading. In each range, the Meter has an input impedance of approx. 10M . This loading effect can cause measurement errors in high impedance circuits. If the circuit impedance is less than or equal to 10k , the error is negligible (0.1% or less). When DC voltage measurement has been completed, disconnect the connection between the testing leads and the circuit under test.
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Model UT107: OPERATING MANUAL
B. AC Voltage Testing (see figure 4)
( figure 4)
Warning T o avoid harms to you or damages to the Meter from
electric shock, please do not attempt to measure voltages higher than 1000Vp although readings may be obtained.
Please take extra care when measuring high voltages to avoid electric shock.
Insert the red test lead into the V terminal and the black test lead into the COM terminal. Set the rotary switch to an appropriate measurement position in . Connect the test leads across with the object being measured. The measured value shows on the display. It is the effective value of sine wave (mean value response).
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The AC voltage ranges are: 200V and 750V. To measure AC voltage, connect the Meter as follows:
Note
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Model UT107: OPERATING MANUAL
If the value of voltage to be measured is unknown, use the maximum measurement position (1000V) and reduce the range step by step until a satisfactory reading is obtained. The LCD displays “1” indicating the existing selected range is overloaded, it is required to select a higher range in order to obtain a correct reading. In each range, the Meter has an input impedance of approx. 10M . This loading effect can cause measurement errors in high impedance circuits. If the circuit impedance is less than or equal to 10k , the error is negligible (0.1% or less). When AC voltage measurement has been completed, disconnect the connection between the testing leads and the circuit under test.
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Model UT107: OPERATING MANUAL
C. DC Current Testing (see figure 5)
Warning Before connecting the Meter in serial to the tested
in-circuit, disconnect in-circuit power.
The current ranges are: 200mA and 10A.
Insert the red test lead into the mA0C or A terminal and the black test lead into the COM terminal. Set the rotary switch to an appropriate measurement position in . Connect the test leads in serial to the object being measured. The measured value shows on the display.
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( figure 5)
If the fuse burns out during measurement, the Meter may be damaged or the operator himself may be hurt. Use proper terminals, function, and range for the measurement. When the testing leads are connected to the current terminals, do not parallel them across any circuit otherwise it will burn the fuse or damage to the Meter.
To measure DC current, connect the Meter as follows:
Note
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Model UT107: OPERATING MANUAL
If the value of current to be measured is unknown, use the maximum measurement position (10A) and 10A terminal, and reduce the range step by step until a satisfactory reading is obtained. When DC current measurement has been completed, disconnect the connection between the testing leads and the circuit under test. When measuring 5A~10A: for continuous measurement
10 seconds and interval time between 2 measurement
greater than 15 minutes.
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Model UT107: OPERATING MANUAL
D. Resistance Testing (see figure 6)
( figure 6)
Warning To avoid damages to the Meter or to the devices
under test, disconnect circuit power and discharge all the high-voltage capacitors before measuring resistance.
The resistance ranges are: 200 , 2k , 20k , 200k , 2M and 20M .
Insert the red test lead into the terminal and the black test lead into the COM terminal. Set the rotary switch to an appropriate measurement position in range. Connect the test leads across with the object being measured. The measured value shows on the display.
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T o avoid harm to yourselves, never attempt to input an effective voltage over 60V in DC or 30V in AC.
To measure resistance, connect the Meter as follows:
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