Kyoritsu 6202 Manual do Utilizador descarregar pdf (Página 15)

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5.2-4 NULL setting (Protective conductor resistance range)

According to below figure, set the range switch to the range for protective

conductor resistance (either 20Ω+ or 20Ω- is OK). Press NULL button after

short-circuited PE/2mA and RPE -Test lead terminals with RPE-Test Lead.

Make sure that the " " mark appears on the LCD and indicated value is

"0.00Ω" ; Data is corrected.

CAUTION

● When pressing NULL button, the indicated value is stored as a reference

value. After that, the difference between the reference value (stored

value) and measuring value is indicated on the LCD.

● The " " mark is displayed on the LCD while the NULL function is

operating. Each time pressing NULL button, NULL function shall be

turned on and off.

● NULL function can not be released by changing the range while it is

operating. To release the function, power off the instrument.

● NULL function works on both 20Ω+ range and 20Ω- range, therefore,

there is no need to do NULL setting at both ranges.

● For the measuring method shown in the following clause 6.3 and 6.4,

NULL setting is required also for an optional cord.

NULL

！

RPE -Test lead terminal PE/2mA terminal

Fig.9

NULL

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Kyoritsu 6202 Manual do Utilizador Página 15