background image

     Notice
1)  Refer to Notice 1, 2 and 3 in the Direct Current Measurement.

1.  Insert the black pen into COM hole and red pen into 

Ù

 hole.

2.  Place the functional switch at 

Ù

 range. Connect the test pen to the resistance to be test in 

     parallel.

     Notice
1)  If the resistance to be tested is more than the maximum value of the range selected, over-
     range 

1

 will be shown. You shall select higher range. For resistance more than 1M

Ù

 and 

     above, the reading can become stable after several seconds; this is normal for high 
     resistance reading.
2)  When input is not made, such as open-circuit conditions, the instrument shows 

1

.

3)  When you check the impendence of internal circuits, power supply to the circuit to be tested 
     must be cut off and capacitor charges must be totally discharged.
4)  There are 10 digits at 200 M

Ù

 short-circuit which shall be subtracted from the reading. For 

     example, 101.0 is shown in measurement of 100 M

Ù

 resistance and the 10 digits shall be 

     subtracted.

3-5 Resistance measurement

3-6 Capacitance testing

     Prior to connection to the capacitance to be tested, note that time for zero reset is needed for 
each change of range. Existing drift reading cannot influence the testing precision.

      Notice
1)  Although protection to the capacitance shift is set by the instrument, testing shall still be 
     carried out after capacitor discharge to avoid damage to the instrument or causing measuring 
     error.
2)  In measuring capacitance, insert the capacitor into the capacitance testing seat.
3)  In measuring large capacitance, it will take a certain time period to get stable reading.
4)  Unit: 1pF=10   

µ

F, 1nF=10   

µ

F

-6

-3

3-7 Frequency measurement

1. Insert the red pen into the Hz hole and the black pen into COM hole.
2. Place the functional switch at kHz range; connect the test pen to the frequency source. You 
    can directly read the frequency from the display.

3-8 Temperature measurement

1. In measuring the temperature, insert the cold end (free end) of thermocouple sensor into the 
    temperature test seat and at the same time note the polarity. Place the working end 
    (temperature measuring end) on or inside the object to be tested. You read the temperature 
    directly from the display which is expressed in 

 or 

.

3-9 Diode testing and buzzer continuity testing

1. Insert the black pen into COM hole and red pen into V

Ù

 hole (polarity of red pen 

+

); 

    place the function switch at  shift; connect the pen to the diode to be tested. The reading is 
    the approximate value of forward voltage of diode.
2. Connect the pen to both ends of circuit to be tested. If the resistance between both ends is 
    lower than about 10

 Ù

, the built-in buzzer rings.

Содержание UT151A

Страница 1: ...P N 110401102629 ...

Страница 2: ...Item Page I Characteristics 3 II Technical data 3 III Operating method 9 IV Maintenance of instrument 15 V Accessories 17 TABLE OF CONTENTS ...

Страница 3: ... broken line The red and black pens should be inserted in the hole which meet the measurement requirement ensure well contact The input signal is not allowed to exceed the limit value to avoid electric shock and damage Changing range switch shift is strictly prohibited during the measurement of voltage and current in order to avoid damaging the instrument SAFETY RULES AND PRECAUTIONS If you want t...

Страница 4: ...eve bracket battery excluding pens I CHARACTERISTICS Accuracy a reading digit the guarantee period is 1 year Ambient temperature 23 5 Relative humidity 75 II TECHNICAL DATA 2 1 DC voltage nput impedance 10MÙ for all ranges Overloading protection For 200mV range 250V DC orAC effective value For other ranges 750Vrms or 1000Vp p peak value 2 2 AC voltage Range Resolution Accuracy UT151A UT151B UT151C...

Страница 5: ... mm A input end 10A 250V Ö 6 25 mm Maximum input current 10A For current over 5A measuring time shall not exceed 15 seconds Measured voltage drop 200mV for full range Display Mean value sine wave effective value 2 5 Resistance Range Resolution Accuracy UT151A UT151B UT151C UT151D UT151E 1 2 2 1 0 2 1 2 2 200 Ù 2 kÙ 20 kÙ 200 kÙ 2 MÙ 20 MÙ 200 MÙ 0 1 Ù 1 Ù 10 Ù 100 Ù 1 kÙ 10 kÙ 100 kÙ 5 0 reading 1...

Страница 6: ......

Страница 7: ...before operation 1 Press the POWER switch to check 9v battery In case of lower battery voltage level will be shown on the display In this case you need to replace the battery 2 symbol beside the pen hole means that input voltage or current shall not exceed the indicated value so that the internal circuits can be protected from damage 3 Prior to the testing the functional switch shall be placed at ...

Страница 8: ...gher voltage but it has a risk of damaging the internal circuits 1 Insert the black pen into the COM hole When the current for which the maximum value is below 200 mA is measured insert the red into mA hole When the current for which the maximum value is 10 A is measured insert the red pen into 10 A hole 2 Place the functional switch at range and connect test pen to the circuit of load to be teste...

Страница 9: ...Although protection to the capacitance shift is set by the instrument testing shall still be carried out after capacitor discharge to avoid damage to the instrument or causing measuring error 2 In measuring capacitance insert the capacitor into the capacitance testing seat 3 In measuring large capacitance it will take a certain time period to get stable reading 4 Unit 1pF 10 µF 1nF 10 µF 6 3 3 7 F...

Страница 10: ...e than 1000V or AC effective voltage higher than 750V 2 Do not connect to the voltage source when the function switch is at Current Shift Ù and 3 Do not use this instrument when the battery is not well connected or its back cover is not tightly installed 4 You can only change the battery or fuse when the test pens are removed and power is cut off Battery installation or replacement This product ad...

Страница 11: ...1 Operating Guide One book 2 Pen One pair 3 Cross point type thin line K thermocouple sensor One suit only for UT151C and UT151E V ACCESSORIES Content of this manual is subject to changes without notice ...

Отзывы: