GW Instek GDM-8245 - Page 49

Appendix
49
Specifications
The specifications are applicable under the following conditions:
 A 1-year calibration cycle.
 An operating temperature of 18 to 28˚C (64.4 to 82.4˚C
)
.
 Relative humidity not exceeding 75%.
 Accuracy is expressed as ± (percentage of reading + digits).

T
he AC specification is based on a 50% duty cycle.

T
he power cord protective grounding conductor must be connected to
ground.
DC Voltage
RANGE RESOLUTION ACCURACY INPUT IMPEDANCE
500mV 10uV 0.03%+4
10MΩ
5V 100uV 0.03%+4
11.1 MΩ
50V 1mV 0.03%+4
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
ranges.
dBM (ref 600Ω)
63.8dBm ~ -97.7dBm.
When the input exceeds the full scale of the selected range, the display will
indicate over-range: “—OL—“.