LIMIT DM 620 Manual Del Usuario página 21

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
10.00 Hz ~ 10.00 MHZ
0.1~99.9%
• 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
Off
NCV
On, red
Off
Continuity On, red
On, green
Off
Diode On, red
On, green
Off
AC/DC voltage
On, red
Off
Current
On, red
Off
Internal temperature
during AC/DC current
measurement
On, yellow
Resolution
0.01 Hz ~ 0.01 MHz
0.1%
Description
<36 V
50~1000 V (the red indicator light flashes from slow to
fast)
OL
No continuity (≥70 Ω)
Continuity (<50 Ω)
>2 V
Breakdown (<0.12 V)
Conduction (0.12~2V)
≤1000 V
>1000 V
≤10 A
>10 A
The temperature in the meter drops to <40°C after
measurement of large current
The temperature in the meter is ≥75°C after measurement
of large current
Accuracy
± (0.1% + 4)
± (2% + 5)
GB
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