AFI 400/420 Optical Fiber Identifier Features  • Support to detect optical signals without disrupting traffic; Based on non-destructive technology; • Indicate the signal direction in fiber; • Detect a variety of optical tones, 270Hz, 1 kHz and 2 kHz; • Suitable for 0.25, 0.9, 2.0, 3.0mm fiber and no need to replace the clamp block, more convenient than others; • Build in visible fault locator 1mW or 10mW optional • Battery low indication; • powered by 2 units of 1.5V AA alkaline batteries;   Main Characteristic Model AFI 400 AFI 420S AFI 420L Wavelength Range 800 to 1700nm (SM) Recognisable signal type * CW, 2kHz, 1kHz, 270Hz ±10% Detector Type InGaAs 2pcs Fiber Type 0.9, 0.25, 2.0, 3.0mm fiber Sensitivity +10 ～ -50dBm Accuracy* +10dB to -30 dBm (Continuous Wave) +10dB to -25 dBm (Modulated Signal) LED Indicator Signal direction; signal frequency (2kHz/1kHz/270Hz); low battery Visual Fault Locator No 1mW 10mW Storage Temperature -200C～+600C, <90%RH Operating Temperature -100C～+500C Power Supply AA *2 Size 230mm * 45mm *45mm Weight About 200g * at 20±30C, indoor, 1550m wavelength, 0.9mm fiber, with white coat, 270Hz, error < 5% * 0.25, 2.0, 3.0mm fiber, the performance at continuous wave will be lower * 1KHz, 2KHz, the performance at modulated signal will be lower * At 1310nm wavelength, the performance will be lower   Accessories   Standard                  User's manual 1 Calibration certification 1 Carrying bag                              1