HTC CM-2070FT Посібник - Сторінка 2
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Input impedance: 10MΩ.
Overload protection: 1000V TRMS.
3.2.4 AC voltage (ACV)
Range
Accuracy
Resolution
400mV
±(1.5% reading+5）
0.1mV
4V
40V
±(1.0% reading+5）
400V
100mV
750V
Input impedance: 10MΩ.
Overload protection: 1000V TRMS.
Frequency response: at 750V range: 50Hz-60Hz, at other ranges:
40Hz-400Hz.
3.2.5 AC current (ACA)
Range
Accuracy
400A
±(2.0% reading+5）
>800A:(4.0%
1000A
reading+10）
Overload protection: >600A, input time<1 minute.
Frequency response: 50Hz-60Hz.
3.2.6 Resistance
Range
Accuracy
400Ω
±(0.8% reading+5）
4kΩ
40kΩ
±(0.8% reading+3）
400kΩ
4MΩ
40MΩ
±(1.2% reading+5）
Overload protection: 250V TRMS.
Warning: DO NOT input voltage value at this range!
3.2.7 Capacitance
Range
4nF
40nF
1mV
400nF
10mV
4uF
40uF
1V
200uF
Overload protection: 250V TRMS.
Warning: DO NOT input voltage value at this range!
3.2.8 Frequency
Range
100Hz
Resolution
1kHz
100mA
10kHz
100kHz
1A
1MHz
10MHz
Input sensitivity: >0.7V.
Overload protection: 250V TRMS.
Resolution
3.2.9 Temperature
0.1Ω
Range
1Ω
（-40～750）℃
10Ω
100Ω
Sensor: K type banana plug (Nickel-chromium-Nickel silicon).
Warning: DO NOT input voltage value at this range!
1kΩ
3.2.10 Continuity Test
10kΩ
Accuracy
Resolution
±(5.0% reading+20）
1pF
10pF
100pF
±(3.5% reading+10）
1nF
10nF
±(5.0% reading+10）
100nF
Accuracy
Resolution
0.1Hz
0.1Hz
1Hz
±(0.5% reading+5）
10Hz
100Hz
1kHz
Accuracy
Resolution
＜400℃±（1.0%+5）
1℃
≥400℃±（1.5%+15）
Range
Description
Diode forward
voltage drop
When the resistance
under test is less
than 50±10Ω,
buzzer sounds
continuously.
Overload protection: 250V TRMS.
Warning: DO NOT input voltage value at this range!
4. OPERATION
4.1 PANEL DESCRIPTION
(refer to picture 1)
1) ① Jaw: 0 to 1000 AC current and NCV
detecting device.
2) ② Hand protection: A safe design to protect
users from touching the dangerous area.
3) ③ Clamp gunlock: Pressing the gunlock can turn on or off the
clamp.
4) ④ Clamp light：Opening the clamp light can light up the tested area
in the dark to prevent the danger.
5) ⑤ NCV indicator: Detect the existence of the high voltage around to
prevent the electric shock.
6) ⑥ Hold button: When pressing this button, the current measured
value will be kept on the LCD and cannot measure any new value at the
moment. Press this Hold button again to exit the hold mode.
7) ⑦ Function choosing switch: Used to select the function, range or
turn on or turn off the clamp meter.
Test Conditions
Forward DC
current is approx
0.5mA, reverse
voltage is
approx 1.5V.
Open circuit
voltage: 0.5V