UNI-T ut151a Operating Manual page 5

2-3 Direct current
Range
Resolution
UT151A UT151B
200 µA 0.1µA (0.8%+1)
1µA
2 mA
10µA
20 mA
100µA
200 mA
10 A 10 mA
Overloading protection: uA, mA input: 200 mA /250V Ö 5 × 20 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
2-4. Alternating current
Range
Resolution
UT151A UT151B
200 µA 0.1µA (1.0%+3)
1µA (1.0%+3)
2 mA
10µA
20 mA
100µA
200 mA
10 A 10 mA
Accuracy
UT151C UT151D UT151E
(0.8%+1)
(0.8%+1)
(1.5%+1)
(2.0%+5)
Accuracy
UT151C UT151D UT151E
(1.0%+3)
(1.8%+3)
(3.0%+5)
Overloading protection: uA, mA input: 200 mA /250V Ö 5 × 20 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
UT151A UT151B
200 Ù 0.1 Ù
2 kÙ 1 Ù
20 kÙ 10 Ù
200 kÙ 100 Ù
2 MÙ 1 kÙ
20 MÙ 10 kÙ
[5.0% (reading-10)+10]
200 MÙ 100 kÙ
Open circuit voltage: 700mV (for range of 200MÙ, the open circuit voltage is about 2.8V).
Overloading protection: 250V for all ranges, DC or AC effective value
Notice: At 200 MÙ shift, the pen is short-circuited. It is normal for the display to show 10
digits. During measurement, these 10 digits shall be subtracted from the reading.
Relative humidity for measurement in 200MÙ shift
Accuracy
UT151C UT151D UT151E
(1.2%+2)
(1.0%+2)
(1.2%+2)
(1.5%+2)
[5.0% (reading-10)+10]
65%