19
c. Add 7% when crest factor is 2.5~3
• Frequency measurement range: 40 Hz ~ 1 kHz, input amplitude:
≥
50% of current range.
Duty ratio is for reference only
• Frequency accuracy: ± (0.1% + 4); resolution: 0.1 Hz
• Overload protection: Same as for DC current
9. Frequency/duty ratio
Range Resolution Accuracy
10.00 Hz ~ 10.00 MHZ 0.01 Hz ~ 0.01 MHz ± (0.1% + 4)
0.1~99.9% 0.1% ± (2% + 5)
• Frequency input amplitude:
≤
100 kHz: 200 mV RMS
≤
input amplitude
≤
20 V RMS
>100 kHz ~ 1 MHz: 600 mV RMS
≤
input amplitude
≤
20 V RMS
>1 MHz: 1 V RMS
≤
input amplitude
≤
20 V RMS
• Duty ratio measurement is only applicable to square waves.
1 Vpp
≤
input amplitude
≤
20 Vpp
Frequency
≤
10kHz, duty ratio: 10.0~90.0%
• Overload protection: 1000 V
10. Indicator light
Function Status Description
NCV
Off <36 V
On, red
50~1000 V (the red indicator light flashes from slow to
fast)
Continuity
Off OL
On, red No continuity (
≥
70
Ω
)
On, green Continuity (<50
Ω
)
Diode
Off >2 V
On, red Breakdown (<0.12 V)
On, green Conduction (0.12~2V)
AC/DC voltage
Off
≤
1000 V
On, red >1000 V
Current
Off
≤
10 A
On, red >10 A
Internal temperature
during AC/DC current
measurement
Off
The temperature in the meter drops to <40°C after
measurement of large current
On, yellow
The temperature in the meter is
≥
75°C after measurement
of large current
GB
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