EEC SE 7430, Руководство пользователя, Страница: 103 / 106

95
9. CALIBRATION
This instrument has been fully calibrated at the factory in accordance to our published
specifications. It has been calibrated with standards traceable to the National Institute Standards
& Technology (NIST). You will find in this manual a copy of the "Certificate of Calibration". It is
recommended that you have this instrument re-calibrated and a safety check done at least once
per year. EEC recommends you use "Calibration Standards" that are NIST traceable, or traceable to
agencies recognized by NIST to keep this instrument within published specifications.
End user metrology standards or practices may vary. These metrology standards determine the
measurement uncertainty ratio of the calibration standards being used. Calibration adjustments
can only be made in the Calibration mode and calibration checks or verifications can only be made
while operating in Test mode.
NOTE1: Verification should be performed before and after calibration. Calibration effects will only
be noticeable after exiting calibration mode.
NOTE2: Calibration before, should be warmed-up 30 minutes.
9.1 Warranty Requirements
EEC offers a standard one-year manufacture’s warranty. This warranty can be extended an
additional four years provided that the instrument is returned each year to EEC for it’s annual
calibration. In order to be eligible for the extended warranty instruments must be returned to EEC
for calibration service at least once every twelve months.
Required Calibration Equipment

0 - 5 KV AC/DC Metered Voltage Divider.

40 mA AC, 10 mA DC Ammeter.

30 AAC Current Shunt

20

, 0.25 watt resistor, 250 volt.

200

, 0.25 watt resistor, 250 volt.

2000

, 0.25 watt resistor, 250 volt.

50M

, 0.25 watt resistor, 1000 volt.

500M

, 0.25 watt resistor, 1000 volt.

100K

, 250 watt resistor, 5000 volt.

1M

, 20 watt resistor, 5000 volt.
9.2 Calibration Initialization
Press and hold the calibration key on the rear panel with a pen, pencil, or small screwdriver while
powering ON the SE. The SE 7440 enters calibration mode after the power on sequence is
complete. When the calibration is initialized the calibration screen will display each calibration
point and appear as follows: