Ac Voltage Measurement; Resistance Measurement; Continuity Test And Diode Measurement - UNI-T UT15B PRO User Manual

Input impedance of mV range is ≥3GΩ, while others range are about 10MΩ. There will be unstable digital
display in case of mV range open-circuit; after connecting with the load, it can be controlled ≤ ±3 digits.
Maximum input voltage: ±1000V; if the input voltage is ≥1000V, the meter alarms; if it is >1100V, OL symbol
will be displayed on LCD.

10.2 AC Voltage Measurement

Range
Resolution
600.0mV 0.1mV
6.000V 0.001V
60.00V 0.01V
600.0V 0.1V
1000V 1V
VFC : 600 . 0V 0 . 1V
Input impedance: about 10MΩ
Display true RMS values. Frequency response: 40~500Hz
Accuracy guaranteed range: 1~100% range, less than 2 digits of residual reading is allowed for short-circuit.
AC peak factor can reach 3.0 at full value (with except for 600V range, which is 1.5 at full value)
Non-sine waveform: Peak factor is 1.0~2.0, accuracy should be added 3.0%
Peak factor is 2.0~2.5, accuracy should be added 5.0%
Peak factor is 2.5~3.0, accuracy should be added 7.0%*
Maximum input voltage: 1000Vrms, if the input voltage is ≥1000V, the meter alarms; if it is >1100V, OL symbol
will be displayed on LCD.
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UT15B PRO/UT17B PRO User Manual
Accuracy
±（1％＋3）
±( 4 %+ 10 )
frequency response: 40~400Hz
UT15B PRO/UT17B PRO User Manual

10.3 Resistance Measurement

Range
Resolution
600.0Ω 0.1Ω
6.000kΩ 0.001kΩ
60.00kΩ 0.01kΩ
600.0kΩ 0.1kΩ
6.000MΩ 0.001MΩ
60.00MΩ 0.01MΩ
Overload protection: 1000V-PTC
Range: measured value= displayed value – short-circuit value of test leads
Open-circuit voltage: 0.5V (test current: about 0.4mA)
10.4 Continuity Test Diode Measurement
Range
Resolution
Circuit breakage resistance value is set as > 50Ω without buzzer beeps
0.1Ω Good conductivity resistance value is set to be ≤10Ω with buzzer beeps
continuously
Open circuit voltage: 3.0V (test current: about 1.2mA)
0.001V
normal voltage of silicon PN junction is about 0.5~0.8V
Overload protection: 1000V-PTC
Accuracy
±(0.5％+2）
±（2.0%+5)
Remark
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