Page 1: ...I The F6121A also has an easy to use thumb lock feature for hands free operation Figure 1 Operating the F6121A Operation of the F6121A is simple as outlined in the following steps 1 Choose an adapter head for the type of fiber to be tested The F6121A is supplied with three adapters as shown in Figure 2 A foam covered to accommodate 900 lm buff ered fiber B smooth surfaced with foam perimeter for u...
Page 2: ...tely 40dB core power the tone LEDs may flicker which indicates that the minimum range for detection was reached Self Test Each time the thumb switch is operated the F6121A performs a self test When this occurs all LEDs will illuminate and then after approximately one half sec ond tum off Low Battery Indication When the battery voltage be comes low the LOW BAT LED illuminates The unit will continue...
