GW Instek GDM-8245 User Manual
Page 5
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 75%
z
Accuracy is expressed as ±(percentage of reading + digits).
z
The AC specification is based on the 50% of duty cycle.
1. DC VOLTAGE
RANGE
RESOLUTION
ACCURACY
INPUT IMPEDANCE
500mV
10μV
10MΩ
5V
100μV
11.1 MΩ
50V
1mV
10.1MΩ
500V
10mV
0.03%+4
10MΩ
1000V
100mV
0.03%+9
10MΩ
Input Impedance
Approx. 10MΩ in parallel with <100pF, all ranges.
Normal Mode Rejection Ratio
>60dB at 60Hz or 50Hz.
Common Mode Rejection Ratio >90dB at 60Hz or 50Hz.
Common Mode Voltage (Max.) 500V dc or peak ac.
Maximum Input
450V dc or peak ac continuous on 500mV range.
1000V dc or peak ac continuous on other range.
dBm (ref 600Ω)
63.80 dBm ~-97.7 dBm
When the input exceeds the full scale of the selected range, the display will appear
“—OL—“ of over-range indication.
2. TRUE RMS AC OR AC+DC VOLTAGE
Accuracy
between 2% of range and full range.
RANGE
20Hz-
45Hz
45Hz-
1kHz
1kHz-
2kHz
2kHz-
10kHz
10kHz-
20kHz
20kHz-
50kHz
500mV
1%+15
0.5%+15
1%+15
2%+30
5%+30
5V
1%+15
0.5%+15
1%+15
2%+30
5%+30
50V
1%+15
0.5%+15
1%+15
2%+30
5%+30
500V
1%+15
0.5%+15
—————————
1000V
1%+15
0.5%+15
—————————
DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
7
RANGE
RESOLUTION
INPUT IMPEDANCE
500mV
10μV
10MΩ
5V
100μV
11.1 MΩ
50V
1mV
10.1MΩ
500V
10mV
10MΩ
1000V
100mV
10MΩ
Input Impedance
Approx. 10MΩ in parallel with < 100pF,all ranges.
Maximum Input
450V dc or peak ac continuous on 500mV range.
1000V rms on other range.
dBm ( ref 600Ω)
63.8dBm ~ -97.7dBm
Crest Factor Range 3.0 at full scale.
When the input exceeds the full scale of the selected range, the display will appear
“—OL—“ of over-range indication.
3. FREQUENCY MEASUREMENT AT ACV RANGE
RANGE
FREQUENCY
INPUT LEVEL (SINE WAVE)
ACCURACY
10Hz ~ 50kHz
≧ 120mV
0.05%+1
500mV
50k ~ 150kHz
≧ 200mV
0.05%+1
5V
10Hz ~ 200kHz
≧ 1.2V
0.05%+1
50V
20Hz ~ 200kHz
≧ 1.2V
0.05%+1
500V
20Hz ~ 1kHz
≧ 12V
0.05%+1
AC+DC measurement does not support AC+Hz function.
Maximum Input
450V peak ac continuous on 500mV range.
500V peak ac continuous on the other range.
4. DC Current
RANGE
RESOLUTION
ACCURACY
BURDEN VOLTAGE
500μA
0.01μA
0.2%+2
0.7Vmax.
5mA
0.1μA
0.2%+2
0.7Vmax.
50mA
1μA
0.2%+2
0.7Vmax.
500mA
10μA
0.2%+2
0.8Vmax.
2A
100μA
0.3%+2
0.8Vmax.
20A
1mA
0.3%+2
0.9Vmax.