Yokogawa µR20000 - Manual (Page 16)

3-3 SM 04P01B01-01E
Testing
3
3.3 Performance Tests
Read the warning and cautions below before beginning tests.
WARNING
• Circuit patterns of the printed circuit board are exposed. Be careful when
handling so that hands or fingers are not injured by the protruding pins.
CAUTION
• Circuit patterns of the printed circuit board are exposed. If other metallic
materials touch these patterns, electrical shorting will occur, causing the circuit
to be damaged or burnt.
• It is sometimes necessary to turn the recorder upside down for adjustment. Do
not drop the instrument, or allow it to fall over.
Test Environment
Item Conditions
Ambient temperature 23 ± 5°C
Relative humidity 55 ± 20%
Atmospheric pressure 86 kPa-106 kPa
Power supply voltage Nominal voltage ±1%
Power supply frequency Nominal frequency ±1%
Power supply waveform Distortion factor of 5% or less
DC power supply ripple Content ratio of 0.1% or less
Vibration A value having negligible effects on the instrument
Position Within ±3% of the specified position
Interference* A value that does not affect the measured results
Electrical field A value that does not affect the measured results
Magnetic field A value that does not affect the measured results
Atmospheric pollutants Levels of corrosive gasses, vapors, salts, and dust that
do not affect the measured results.
Other external effects** A value that does not affect the measured results
* Interference refers to common mode noise, series mode noise, power supply noise, and other
phenomena in the signal line.
** Other external effects include luminance, draft, ultrasonic waves, and radiation.
Test Instruments
Instrument Specifications
DC voltage generator Accuracy: ±0.01% of setting or better
DMM Accuracy: ±0.01% of rdg or better
Variable resistors Accuracy: 0.01% + 2 mΩ or better
Insulation tester 500 VDC
Withstand voltage tester 1 to 1.5 kVAC
Glass scale 105 mm or more