Tettex MIDAS 2881, Руководство по эксплуатации

Страница: 58 / 164

48 Software
By using an external power supply, the safety inside the
Midas is deactivated as it is linked to the internal power
supply.
The operator is, as always, responsible to fulfil all safety
rooles related to a high voltage test included in the external
power supply used.
Current Booster
If the max. output current of the system is not enough (e.g. for short circuit impedance testing) the
optional current booster type 5287 can used (increased current at output voltages 10V or 100V).
Check box “use Booster 5287”
If the booster is used with the MIDAS, select this check box.
The “use external Cn” is selected then automatically. The cable
length and Cn values have to be entered there. The voltage in
MANUAL Tab sheet can then be entered in a % value instead of V.
Standard Capacitor Cn
This option allows using the Midas with an
external standard capacitor (e.g. Tettex types
3320 or built-in the Current Booster 5287).
The corresponding values of the external
nominal capacitor has to be introduced
accordlingly.
If the current booster 5287 is selected, these values are stored in the system and recalled when the
current booster is again used.
Check box “use external Standard Capacitor Cn”
This option has to be marked if you connect an external
standard capacitor Cn,.
Input “Length of measuring cable Cn”
Length and type of the cable influences the measurements
so it is important to enter the cable length. Only supplied
cables shall be used.
Input “Value of external Standard Capacitor Cn”
The maximal current should be less or equal then 300 mA.
Input “DF (tan

) @ 50 Hz”
In general, only accurate standard capacitor can be used.
If the connected external capacitor has a known error, you
should correct the error setting in this field.