DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
6
3. SPECIFICATIONS
The specifications are operated under the essential conditions as follows:
z A 1-year calibration cycle.
z An operating temperature of 18 to 28℃ (64.4 to 82.4℉).
z Relative humidity not exceeding 90%.
z Accuracy is expressed as ±(percentage of reading + digits).
z The AC specification is based on the 50% of duty cycle.
1. DC VOLTAGE OR DCV OF RIPPLE FUNCTION
RANGE
RESOLUTION ACCURACY
500mV
10μV
5V
100μV
50V 1mV
500V 10mV
1200V 100mV
0.02%+4
DCV Input Impedance
10MΩ in parallel with <100pF, all ranges.
DCV of Ripple Function 5V~500V 3 ranges.
DCV of Ripple Input
Impedance
10MΩ∕∕ 10MΩ in parallel with <100pF.
Normal Mode Rejection Ratio >60dB at 60Hz or 50Hz.
Common Mode Rejection Ratio >90dB at 60Hz or 50Hz.
Common Mode Voltage
(Maximum)
500V dc or peak ac.
Maximum Input
450V dc or peak ac continuous on 500mV range an
ripple function.
1200V dc or peak ac continuous on other range.
When the input exceeds the full scale of the selected range, the display will appear
“—OL—“ of over-range indication.
DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
7
2. TRUE RMS AC, AC+DC VOLTAGE
Accuracy
between 2% of range and full range.
RANGE
20Hz-
50Hz
50Hz-
2kHz
2kHz-
10kHz
10kHz-
20kHz
20kHz-
50kHz
50kHz-
100kHz
500mV
5V
50V
2%+20 5%+50
500V
0.5%+50
-------- --------
1000V
1%+10
0.3%+30 0.4%+50
-------- -------- --------
Input Impedance
10MΩ in parallel with < 100pF,all ranges.
Maximum Input
450V dc or peak ac continuous on 500mV range.
1000Vrms on other range.
Crest Factor Range
3.0 at full scale.
AC+DC all ranges
±(percentage of reading + 50 counts).
When the input exceeds the full scale of the selected range, the display will appear
“—OL—“ of over-range indication.
3. ACV OF RIPPLE FUNCTION
RANGE
20Hz-
50Hz
50Hz-
2kHz
2kHz-
10kHz
10kHz-
20kHz
20kHz-
50kHz
50kHz-
100kHz
500mV 1%+10 0.3%+30 0.4%+50 0.5%+50 2%+20 5%+50
Input Impedance
10MΩ∕∕ 10MΩ in parallel with < 100pF.
Maximum Input 450V dc or peak ac continuous.
Crest Factor Range
3.0 at full scale.
When the input exceeds the full scale of the selected range, the display will appea
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