GW Instek GDM-8246 User Manual User Manual
Page 5
DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
5
2. INTRODUCTION
This is a portable, bench-type dual display digital multimeter with a
good-performance 50000 counts designed for general purpose application.
The dual display allows you to display two functions of the input signal
being measured.
Features
z 50000 counts DMM
z Multi-function ACV, DCV, ACA, DCA, R, C , Hz, Continuity Beeper,
Diode Test, MAX/MIN, REL, dBm, HOLD, Autohold, Compare.
z Dual display Indicate ACV and Hz, DCV (ACV) and dBm or DCV
and ACV ripple.
z Manual or Autoranging
z 0.02% DCV accuracy
z 20A high current range
z 1000V high voltage range
z AC True RMS or AC+DC True RMS.
z ACV frequency response 100kHz.
z The reference impedance selectable in the dBm modifier.
z Auto-recall the setting upon power on.
z Interface RS232 (Standard) and GPIB (option).
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.
z The power cord protective grounding conductor must be connected to
ground.
1. DC VOLTAGE OR DCV OF RIPPLE FUNCTION
RANGE
RESOLUTION
ACCURACY INPUT
IMPEDANCE
500mV
10μV
10MΩ
5V
100μV
11.1 MΩ
50V
1mV
10.1MΩ
500V
10mV
10MΩ
1000V
100mV
0.02%+4
10MΩ
DCV Input Impedance
Approx. 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 and
ripple function.
1000V 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.