Range And Accuracy; Resistance Measurement Accuracy; Voltage Measurement Accuracy; Temperature Measurement Accuracy - UNI-T UT677A Operating Manual

and data access.
III. Range and accuracy
Accuracy guarantee period: 1 year
Accuracy guarantee period after calibration: 1 year
Accuracy
guarantee Accuracy guaranteed temperature and humidity range: 23℃±5℃, below
conditions
80%RH
Warm-up time: not required
Add test accuracy 0.1/℃ within the operating temperature range (except
Temperature
characteristics
18℃~28℃)
Measuring current accuracy: ±25%
Excitation
Measuring current frequency: 1.000KHz ± 20Hz
signal
(Using multi-stage noise reduction technology to effectively filter out noise
accuracy
interference of different frequencies or near the same frequency)

3.1 Resistance measurement accuracy

Range
3 mΩ
30 mΩ
300 mΩ
3 Ω

3.2 Voltage measurement accuracy

Range
7 V
70 V

3.3 Temperature measurement accuracy

Range
-10.0℃~60.0℃
Note: The above accuracy guarantee is limited to the factory standard test leads. When
using non-standard test leads or extension cables, this accuracy table is also applicable after
zero adjustment.
IV．Technical Specification
Function
Maximum
Resolution
display
3.100 mΩ 1 uΩ
31.00 mΩ 10 uΩ
310.0 mΩ 100 uΩ
3.100 Ω
1 mΩ
Maximum
display
±7.100 V
±71.00 V
Maximum
display
60.0℃
Battery internal resistance measurement, battery voltage
measurement, temperature measurement
Test accuracy
±1 % fs. ±20 dgt.
±0.5 % fs. ±15 dgt.
Resolution
1 mV
10 mV
Resolution
0.1℃
- 3 -
Measuring
current
200 mA
200 mA
20 mA
2 mA
Test accuracy
±0.2 % fs. ±10 dgt.
Test accuracy
±1.0℃