MAY620 Professional OTDR - Front View
MAY620 Professional OTDR
MAY620 OTDR Ports

MAY620 OTDR is a new generation of portable and intelligent measuring instrument for testing fiber optic communication system. It adopts 7 inch color touch screen, button/touch operation, internal integration of eight major functional modules, intelligent power-saving management, and 10 hours long operating time, which help customers effectively solve the field testing and maintenance.

It is mainly used to measure the length, loss and connection quality of optical fibers and cables, and can be widely used in engineering construction, network maintenance and testing, emergency repair, and the development and production of optical fibers and cables.

The highest 42dB dynamic range can penetrate optical splitters easily for PON network testing.

The design concept of multi-functional integration, precision testing and convenient operation makes the field testing simple.


  • Integrated design, smart and rugged
  • Shockproof, outdoor enhancement
  • FC/SC/ST connectors interchangeable
  • Automatic and manual test function
  • OTDR Viewer software for data analysis
  • Simple to use, one-button measurement
  • Live fiber warning in case of damaging OTDR diode
  • MAY620 OTDR uses 1625nm to carry out online testing with optical filter, without distrubing the service in FTTH PON network


  • FTTX testingwith PON networks
  • CATV network testing
  • Access network testing
  • LAN network testing
  • Metro network testing
  • Laband Factory testing
  • Live fiber troubleshooting
  • FTTA troubleshooting

2. Optical Power Meter (OPM)
3. Optical Light Source (OLS)
4. Visual Fault Locator (VFL)
Visual Fault Locator uses red laser of 650nm to locate broken fiber point and test fiber continuity.
5. Fiber Optic Microscope (FIM)
Fiber Optic Microscope is used to check fiber optic connector endface. The inspection probe is sold seperately.
6. Event Map
Event Map is similar to EXFO’s iOLM function, which can display events in user-friendly icons.
7. Report Print
PC software helps print out OTDR test reports.

Specification: 1. OTDR
Model P33 P35 C26 C33 T35 T38 T43 TC35 TP38
Dynamic Range (dB)① 33 35 26 33 35/33/33 38/35/36 43/41/41 35/33/32 38/35/36
Wavelength (nm) 1625 1650 1310/1550/1625 1310/1550/1650 1310/1490/1550
Event Dead Zone② 0.8m 0.8m 0.8m 0.8m 0.8m 1m 1m 0.8m 1m
Attenuation Dead Zone 4m 4m 4m 4m 4m 5m 5m 4m 5m
Fiber Type SMF
Measurement Range 0.5/2/5/10/20/40/80/120/160km
Measurement Pulse Width 3/5/10/20/50/100/200/500/1000/2000/5000/10000/20000ns
Ranging Accuracy ±(1+measuring distance×3×10-5+sampling resolution )
Averaging Time 10s, 15s, 30s, real time, customized
Linearity ≤0.05dB/dB
Loss Threshold 0.01dB
Distance Resolution 0.01m
Loss Precision 0.001dB
Sampling Point 128,000 points maximum
Sampling Resolution 0.25m minimum
File Format SOR standard file format
Adapter FC/UPC (Interchangeable SC, ST adapter)
Signal Detection Effective protection of APD
①Testing temperature is 25°C±2°C, maximum pulse width, average time is more than 30s.
②Test conditions of Event Dead Zone are minimum range, minimum pulse width, reflection loss of optical fiber end surface (>45dB), typical value.
2. Optical Power Meter
Wavelength Range (±20nm) 800~1700nm
Calibrated Wavelength 850/1300/1310/1490/1550/1625nm
Test Range Type B: -70~+10dBm (standard); Type A: -50~+26dBm (optional)
Resolution 0.01dB
Uncertainty ±0.35dB±1nW
Modulation 270/1k/2kHz, Pi≥-40dBm
Connector FC (SC, ST interchangeable)
3. Optical Light Source
Working Wavelength Same as OTDR output wavelength
Output Power ≥-5dBm±1dB
Accuracy CW/270/1k/2kHz
Connector FC/UPC (SC, ST interchangeable)
4. Visual Fault Locator
Wavelength (±20nm) 650nm
Power 10mW, CLASS IIIB
Detecting Range 12km
Mode CW/2Hz
Connector FC
Other Specification:
Dimension 230×185×70mm, 1.5kg (battery included)
Display 7 inch TFT-LCD screen
Interface 2×USB, 1×mini USB, 1/2×OTDR ports (OLS ports), 1×VFL port, 1×OPM port, 1×charging port
Power Supply 8.4VDC, 100VAC to 240VAC, 50~60Hz
Battery 7.4V/6.6Ah lithium battery
Operating time: 10 hours, Telcordia GR-196-CORE
Charging time: <3 hours (power off)
Power Saving Backlight: Common/Highlight/Power saving/Customized
Auto power off: Never/1min/5min/10min/30min/60min
Data Storage Internal memory: 8GB (about 80,000 groups of curves)
Language English (default), Spanish (optional)
Environmental Conditions Operating temperature and humidity: -10℃~+50℃, ≤95% (non-condensation)
Storage temperature and humidity: -20℃~+75℃, ≤95% (non-condensation)
Item Name Quantity
1 OTDR 1pc
2 AC/DC power adapter 1pc
3 U disk (including simulation analysis software) 1pc
4 Data line 1pc
5 SC adapter 1pc
6 FC adapter 1pc
7 ST adapter 1pc
8 User manual 1pc
9 Calibration Certificate 1pc
10 Cleaning swab 10pcs
11 Carrying bag 1pc
Ordering Information:
Model MAY620
Wavelength and Dynamic Range P33: 1625nm, 33dB
P35: 1625nm, 35dB
C26: 1650nm, 26dB
C33: 1650nm, 33dB
T35: 1310/1550/1625nm, 35/33/33dB
T38: 1310/1550/1625nm, 38/35/36dB
T43: 1310/1550/1625nm, 43/41/41dB
TC35: 1310/1550/1650nm, 35/33/32dB
TP38: 1310/1490/1550nm, 38/35/36dB
Power Meter None: -70~+10dBm (default)
A: -50~+26dBm
Connector None: FC/UPC and SC/UPC (default)