8.1 General Specifications
142
Guaranteed Accuracy Specifications
Conditions of guaranteed
accuracy
After 30 minutes warm-up, sine wave input, power factor 1,
frequency 50/60 Hz ±2 Hz
Temperature and humidity
range for guaranteed
accuracy
@23 ±5°C (73±9°F), 80% RH or less
This temperature and humidity specification applies unless specified
otherwise
Display range of
guaranteed accuracy
Usable measurement range
Period of guaranteed
accuracy
1 year
Other Accuracy-Related Specifications
Real-Time Clock accuracy
±5 ppm (within 13 s/mo., @25°C, 77°F)
Temperature coefficient
±0.03% f.s./°C or better (in the ranges 0 to 18°C, 32 to 64°F and 28
to 40°C, 82 to 104°F)
Effect of same-phase
voltages
±0.2% f.s. or better (600 Vrms AC, 50/60 Hz, between shorted
voltage input terminals and instrument case)
Effect of external
magnetic field
±1.5% f.s. or better (in a magnetic field of 400 Arms/m AC, 50/60 Hz)
Effect of radiated RF
electromagnetic field
Using Model 9667 Flexible Clamp-on Sensor, current ±5% f.s. or bet-
ter at 10 V/m (f.s. is rated primary current of sensor), no effect with
other clamp-on sensors
Effect of conducted RF
electromagnetic field
Using Model 9667 Flexible Clamp-On Sensor, current ±5% f.s. or
better at 3 V (f.s. is rated primary current of sensor), no effect with
other clamp-on sensors
Other Basic Specifications
Backup battery life
To retain clock data, settings data and measurement data (lithium
battery)
Approx. 10 years (@23°C, 73°F)
Clock functions
Auto calendar, auto leap year, 24-hour format
Data capacity of internal
memory
4 MB (backed up by lithium battery)
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