Uni-T UT171B [10/20] Ut171a b c instructions ut171a b c instructions

Содержание

• Contents 2
• Ut171a b c instructions 2
• I overview 3
• Ii accessories 3
• Iii safety operation criterion 3
• Ut171a b c instructions 3
• Iv electrical symbols 4
• Ut171a b c instructions ut171a b c instructions 4
• V comprehensive specification 4
• Ut171a b c instructions ut171a b c instructions 5
• Vi appearance structure refer to figure 1 vii displayer refer to figure 2 5
• Îbb b b b 5
• Ut171a b c instructions ut171a b c instructions 6
• Viii knob of function selection and button 6
• Ut171a b c instructions ut171a b c instructions 7
• Ix measuring operation instructions 8
• Measuring ac dc voltage see figure 3 8
• Ut171a b c instructions 8
• Measuring of resistance conductivity g figure 4a 9
• Ut171a b c instructions ut171a b c instructions 9
• Measuring of circuit switching 10
• See figure 5 10
• Ut171a b c instructions ut171a b c instructions 10
• Diode test see figure 6 11
• Measuring of capacitance 11
• See figure 7 11
• Ut171a b c instructions ut171a b c instructions 11
• Measuring of frequency duty ratio 12
• Measuring temperature 12
• See figure 8 12
• See figure 9 12
• Ut171a b c instructions ut171a b c instructions 12
• A note 13
• Measuring ac dc see figure 10 13
• Ut171a b c instructions ut171a b c instructions 13
• A 600a aca dca external input 14
• A caution 14
• Current calipers measurement see figure 11 14
• Non contact ac voltage sensing see figure 12 14
• Ut171a b c instructions ut171a b c instructions 14
• Other functions 15
• Square wave output see figure 13 15
• Ut171a b c instructions ut171a b c instructions 15
• A caution 16
• Alnput impedance 16
• Measuring of dc voltage 16
• Ut171a b c instructions ut171a b c instructions 16
• X technical indexes 16
• Measuring of ac current 17
• Measuring of ac voltage 17
• Measuring of dc current 17
• Ut171a b c instructions ut171a b c instructions 17
• Measuring of capacitance 18
• Measuring of frequency duty ratio cycle 18
• Measuring of resistance conductance applicable to ut171b c only 18
• Ut171a b c instructions ut171a b c instructions 18
• Measuring of temperature applicable to ut171b c only 19
• Measuring with current caliper ut171c only 19
• Square wave output ut171c only 19
• Ut171a b c instructions ut171a b c instructions 19
• Ut171a b c instructions ut171a b c instructions 20
• Xi maintenance and repair 20

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UT171A B C Instructions UT171A B C Instructions 3 Measuring of circuit switching see Figure 5 If resistance between two terminals measured is higher than 100Q it shall be deemed as open circuit and buzzer shall be without sound if resistance between two terminals measured is lower than 10Q it shall be deemed as sound conductivity of circuit and buzzer shall produce constant sound Caution While inspecting in circuit circuit switching it is necessary to cut off all the power supply in the circuit under test and discharge residual electric charge in capacitor before measuring Do not input voltage higher than DC 30V or AC 30V to prevent personal injury Figure 4a 15 Figure 4b Figure 5 16