PF9800 series User
’
s Manual
Copyright
©
EVERFINE, Copy or spread without authorization is prohibited.
29
Chapter 8 Calibration and Inspection
8.1 Conditions for calibration and inspection
(1) Ambient temperature: 23
℃
±
2
℃
(2) Ambient humidity: 35% ~ 55%
(3) Voltage of power supply: 220V
±
11V
(4) Frequency of power supply: 50Hz
±
1Hz
(5) Preheating time:
≥
30 minutes
(6) No mechanical vibration and
electromagnetic interference around to affect
the normal work.
8.2 Technical documents of calibration and test based
(1) JJG
（
Zhe
）
90-2007
Digital multimeter calibrator
(2) JJG 780-1992
AC digital power meter
(3) JJG
（
Zhe
）
89-2007
Electric parameters test meter
8.3 Equipments for calibration and test
(1) Standard meter
（
0V~600V
，
0A~20A
）
The precision between 45Hz and 65Hz should better than 0.05%. The uncertainty
of other frequency should be less than 1/3 to 1/5 of the maximum permissible
error of the detected instrument.
Recommend: PF2010 digital power meter from EVERFINE.
(2) Signal source
（
0V~600V
，
0A~20A
）
The precision between 45Hz and 65Hz should better than 0.02%/3min. The
stability of other frequency should be better than 1/5 to 1/10 of the accuracy the
detected instrument.
Recommend: YS6100 standard power from EVERFINE
（
test between 45Hz and
