Unit UT39B User manual

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UT39B
MANUAL
HANDLEIDING
NOTICES

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UT39B
• Illustrations and tables 1
• English Operating Manual 5
• Nederlandse handleiding 13
• Notices français 21
Fig 2: Display symbolsFig 1: The meter’s structure Fig 3: Voltage measurement
Fig 5: Resistance MeasurementFig 4: Current Measurement Fig 6: Capacitance Measurement

Model: UT39B OPERATING MANUAL
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Fig 7:Transistor Test Fig 8: Replacing the battery Fig 9: Replacing the fuses
Accuracy: +/-(a% reading + b digits) - guaranteed for 1 year
Operating temperature: 23°C +/- 5%
Relative Humidity: < 75%
Range Resolution Accuracy
200mV 100µV
+/-(0.5%+1)
2V 1mV
20V 10mV
200V 100mV
1000V 1V +/-(0.8%+2)
Range Resolution Accuracy
2V 1mV
+/-(0.8%+3)20V 10mV
200V 100mV
750V 1V +/-(1.2%+3)
Input impedance: 10MW
Overload protection: 250VAC (200mV range) - 1000V DC / 750V AC (all other ranges)
Input impedance: 10MW
Maximum input voltage: 750V AC
Displays effective value of sine wave.
Overload protection: 1000VDC or 750VAC

Range Resolution Accuracy Overload
protection
20µA 0,01µA +/-(2%+5)
Fuse: 0.315A / 250V
Fast type 5x20mm
2mA 1µA +/-(0.8%+1)
20mA 10µA
200mA 100µA +/-(1.5%+1)
10A 10mA +/-(2%+5) Unfused
Range Resolution Accuracy Overload
protection
2mA 1µA +/-(1.0%+3) Fuse: 0.5A /250V
Fast type: 5x20mm
200mA 100µA +/-(1.8%+3)
10A 10mA +/-(3.0%+5) Unfused
Range Resolution Accuracy Overload
protection
200W0.1W+/-(0.8%+3)
250V DC or AC rms
2kW1W
+/-(0.8%+1)20kW10W
2MW1kW
20MW10kW+/-(1.0%+2)
200MW100kW+/-(5%+10)
When <5A: continuous measurement is allowed
When >5A: continuous measurement less than 10 seconds at an interval more than 15 minutes
When <5A: continuous measurement is allowed
When >5A: continuous measurement less than 10 seconds at an interval more than 15 minutes
Displays effective value of sine wave
Measurement voltage drop: Full range at 200mV
Open circuit voltage: At 200MW: approx. 3V
Other range: <= 700mV
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Range Resolution Remark
0.001V Open circuit voltage around 2.8V
A good junction drops between 0.5V ~ 0.8V
1WThe buzzer does not sound if the resistance of a
circuit is below 70W.
The buzzer sounds continuously if the circuit is in
a good condition with resistance below 10W
Range Resolution Accuracy
2nF 1pF
+/-(4%+3)200nF 0.1nF
20µF 10nF
Testing signal: approx 400Hz, 40mV rms
Range Resolution Remark
hFe 1bVce=3V Ibo=10µA 1000bMAX
Model: UT39B OPERATING MANUAL

• Overview 6
•
• Safety information 6
• The meter’s structure 7
• Functional buttons 7
• Display symbols 8
• Measurement operation 8
A. AC/DC voltage measurement 8
B. AC/DC current measurement 9
C. Resistance measurement 9
D. Capacitance measurement 10
E. Diode test 10
F. Continuity test 11
G. Transistor test 11
• Sleep mode 12
• Maintenance and service 12
A. General service and maintenance 12
B. Replacing the battery 12
C. Replacing the fuses 12
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This operating manual covers information on safety and cautions. Please read the relevant informa-
tion carefully and observe all the Warnings and Notes strictly.
Measuring range and accuracy - seep page 1-3
1. 10A terminal: un-fused.
2. µA mA terminal: 0.315 A H 250V Fast Type Ceramic Fuse 5x20mm.
3. Range: Manual ranging
4. Maximum display: 1999 or 3 1/2 digit.
5. Measurement speed: Updates 2 ~3 times/second
6. Temperature: Operating: 0°C~40°C
Storage: 30°C~40°C : £50%
7. Battery type: 9V 6F22 or NEDA 1604 or IEC6LR6
8. Safety compliances: IEC61010 CATI 1000V CATII 600V
Overvoltage and double insulation standard.
9. Conform: CE
Meter UT39B complies with the standard IEC/EN61010-1, in pollution degree 2, overvoltage cat-
egory (CAT I 1000V, Cat II 600V) and double insulation.
To avoid possible electic 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 connections.
• Inspect the test leads for damaged insulation or exposed metal. Replace damaged test leads
• The internal circuit of the meter shall not be altered at will to avoid damage of the meter and
any accident.
• The meter is suitable for indoor use.
• 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 shock and personal injury.
• Do not apply more than the rated voltage, as marked on the Meter, between the terminals or
between any terminal and the grounding.
• The rotary switch should be placed in the right position and not any changeover of range shall
be made during measurement is conducted to prevent damage of the Meter.
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• When the Meter working at an effective voltage over 60V in DC or 30V rms in AC, special care
should be taken for there is danger of electric shock.
• Do not use or store the Meter in an environment of high temperature; humidity, explosive,
dampened.
•
• Disconnect circuit power and discharge all high-voltage capacitors before testing resistance,
continuity, diodes and current.
• Before measuring current, check the Meter fuses and turn off power to circuit before connect-
ing the Meter to the circuit.
1. LCD Display
2. Data hold button
3. Transistor jack
4. COM input terminal
5. Other input terminals
6. mA input terminal
7. 10A input terminal
8. Capacitance jack
9. Rotary switch
10. Power
11. POWER button (yellow)
ON/OFF switch
12. HOLD button (blue)
Press HOLD to enter and exit hold mode.The symbol H is shown on the display when value is
hold.

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1. H Data hold is active
2. - Indicates negative reading
3. Battery is low.To avoid false readings, replace the battery as soon as this
indicator appears.
4. hFE Unit of transistor
5. °C Centigrade temperature
6. Test of diode
7. Continuity buzzer
8. Dangerous voltages
A. DC/ AC Voltage Measurement
To measure voltage, connect the meter as follows:
1. Insert the red test lead into the VWterminal and the black test lead into the COM terminal.
2. Set the rotary switch to an appropriate measurement position in V--range for DC or V~ for AC.
When the value is unknown always start from the max range 1000 V.
3. Connect the test leads across with the object being measured. The measured value shows on
the display.
Note
• Displays ‘1’ selected range is overload; 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.10MW. This loading effect can
cause measurement errors in high impedance circuits. If the circuit impedance is less than or
equal to 10kW, the error is negligible (0.1% or less).
To avoid possibly damages to the meter, please do not attempt to input higher than 1000V or 750V
rms.
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B. DC/AC Current Measurement
• Never attempt an in-circuit current measurement where the voltage between terminals and
ground is greater than 60V DC or 30V rms.
• 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.
• Measuring time for current should be less than 10 sec and interval between measurement
should be at least 15 minutes.
To measure current, do the following:
1. Turn off power to the circuit. Discharge all high-voltage capacitors.
2. Insert the red test lead into the A or mA terminal and the black test lead into the COM termi-
nal.
3. Set the rotary switch to an appropriate measurement position A = for DC or A~ for AC. When
the value is unknown always start from the max range 20 A.
4. Break the current path to be tested. Connect the red test lead to the more positive side of the
break and the black test lead to the more negative side of the break.
5. Turn on power to the circuit.The measured value shows on the display.
If the value to be measured is unknown, use the maximum measurement position and reduce the
range step by step until a satisfactory reading is obtained.
C. Resistance Measurement
To avoid damages tot the meter or to other devices under test, disconnect circuit power and dis-
charge all the high voltage capacitors before measuring resistance.
To measure connect the meter as follows:
1. Insert the red test lead into the VWterminal and the black test lead into the COM terminal.
2. Set the rotary switch to an appropriate measurement position Wrange.
3. Connect the test leads across with the object being measured. The measured value shows on
the display.
For high resistance measurement (>1MW) it is normal to take several seconds to obtain a stable
reading.