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8842A
Instruction Manual
1-4
Operating Characteristics
TEMPERATURE COEFFICIENT ...........<(0.0006% of reading + 0.3 Count) per °C from 0°C to 18°C
and 28°C to 50°C.
MAXIMUM INPUT...................................1000V dc or peak ac on any range.
NOISE REJECTION................................Automatically optimized at power-up for 50, 60, or 400 Hz.
RATE READINGS/
SECONDî
FILTER NMRRï PEAK NM
SIGNAL
CMRRð
S 2.5 Analog & Digital >98 dB 20V or 2x FS >140 dB
M 20 Digital >45 dB 1x FS >100 dB
F 100 None _ 1x FS >60 dB
1. Reading rate with internal trigger and 60 Hz power line frequency. See “reading rates” for more detail.
2. Normal Mode Rejection Ratio, at 50 or 60 Hz ±0.1%. The NMRR for 400 Hz ±0.1% is 85 dB in S rate
and 35 dB in M rate.
3. Common Mode Rejection Ratio at 50 or 60 Hz ±0.1%, with 1 kΩ in series with either lead. The CMRR
is >140 dB at dc for all reading rates.
4. 20 volts or 2 times full scale whichever is greater, not to exceed 1000V.
5. Reading rate-1/3 rdg / sec. in the 20 mV, 20Ω, 200 mA dc ranges
6. Reading rate-1.25 rdg / sec. in the 20 mV, 20Ω, 200 mA dc ranges
TRUE RMS AC VOLTAGE (OPTION 8842A-09)
Input Characteristics
RESOLUTIONRANGE FULL SCALE 5ñ
DIGITS
5ñ DIGITS 4ñ DIGITS*
INPUT
IMPENDANCE
200 mV 199.999 mV 1 µV 10 µV1 MΩ
2V 1.99999V 10 µV 100 µV Shunted
20V 19.9999V 100 µV1 mV By
200V 199.999V 1 mV 10 mV <100 pF
700V 700.00V 10 mV 100 mV
*4ñ digits at the fastest reading rate