MAY400D MINI PRO Multi-functional OTDR

MAY400 Mini OTDR - Front
MAY400 Mini OTDR - FC and SC Adapters for OTDR Port and RJ45 Remote Module for Ethernet Cable Sequence
MAY400 Mini OTDR - RJ45 Ethernet Port
MAY400 Mini OTDR - Right Side
MAY400 Mini OTDR - Optical Ports
MAY400D Mini OTDR with Optional Ethernet Cable Tracker

Standard Accessories

FC Adapter for OTDR

FC Adapter for OTDR Port (Standard)

SC Adapter for OTDR

SC Adapter for OTDR Port (Standard)

Network Cable Tracker for MAY400 Mini OTDR

Network Cable Tracker (Standard)

EU Power Adapter

EU Power Adapter (For Selection)

US Power Adapter

US Power Adapter (For Selection)

UK Power Adapter - 1

UK Power Adapter (For Selection)

LC Adapter for OTDR

LC Adapter for OTDR Port (Optional

ST Adapter for OTDR

ST Adapter for OTDR Port (Optional)

MAY400D MINI PRO Multi-functional OTDR integrates fiber cable and Ethernet cable testing in one unit. It is a powerful tester for installers of fiber cable and network cable.


  • Integrated design, smart and rugged
  • FC/SC/ST connectors interchangeable
  • Automatic and manual test function
  • Visual Fault Locator (VFL) function
  • OTDR Viewer software for data analysis


  • CATV network testing
  • Access network testing
  • LAN 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. Event Map
    Event Map is similar to EXFO’s iOLM function, which can display events in user-friendly icons.
6. RJ45 Sequene, Length and Tracker
     It can check wire map, measure the length of RJ45 cable, and trace and locate the RJ45 network cable.
7. Flashlight
8. Report Print
    PC software helps print out OTDR test reports.

Model MAY400D
Wavelength 1310/1550nm±20nm
Dynamic Range① 24/22dB
Fiber Type SMF
Event Dead Zone② 3m
Attenuation Dead Zone 8m
Measurement Range 500m/1km/2km/4km/8km/16km/32km/64km
Pulse Width 3ns/5ns/10ns/20ns/30ns/50ns/80ns/160ns/320ns/500ns/800ns/1us/2us/3us/5us/8us/10us
Ranging Accuracy ±(1+Sampling interval+0.005%*Test distance)
Linearity ±0.2dB/dB
Sampling Resolution 0.05~8m
Samping Points 16~128K
Loss Resolution 0.001dB
Loss Threshold 0.2dB
Range Resolution 0.001m
Refractive Index 1.00000~2.00000
Reflection Accuracy ±3dB
File Format SOR standard file format
Loss Analysis 4-point method / 5-point method
Laser Safety Level Class II
Adapter FC (Interchangeable SC adapter)
Language Chinese, English, Russian, Portuguese, Spanish, French, Korean, Vietnamese (Select one or two languages)

①Testing temperature is 25°C±2°C, maximum pulse width, average time is more than 3 minutes.
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 850/980/1300/1310/1490/1550/1625/1650nm
Test Range Type A: -50~+26dBm (standard);
Type B: -70~+10dBm (optional)
Resolution 0.01dB
Uncertainty ±5%
Frequency Identification CW/270/330/1k/2kHz
Connector Universal 2.5mm (FC/SC/ST)
3. Optical Light Source
Emitter Type FP-LD
Working Wavelength 1310/1550nm±20nm
Output Power ≥-5dBm
Modulation Frequency CW/270Hz/330Hz/1kHz/2kHz
Accuracy CW, ±0.5dB/15min (Test after 15 minutes of preheating)
Connector FC (Interchangeable SC adapter)
  • The wavelength of Optical Light Source is the same as OTDR wavelength.
  • Optical Light Source shares the same fiber port as OTDR port.
4. Visual Fault Locator
Wavelength (±20nm) 650nm
Power ≥10mW
Mode CW/1Hz/2Hz
Connector Universal 2.5mm (FC/SC/ST)
5. RJ45 Sequene, Length and Tracker
Test Range 300m
Other Specification:
Display 3.5 inch color LCD
Power Supply AC/DC adapter: Input: 100~240VAC, 50/60Hz, 0.4A; Output: 5V, 2.0A; Lithium battery: 3.7V, 4000mAh
Battery Standby Life ≥20h
Battery Working Hours ≥12h
Communication Micro USB
Data Storage Internal: 600 curves; External: TF card
Weight 0.35kg
Size 173*82*37mm
Operating Temperature -10 ~ +50°C
Storage Temperature -40 ~ +70°C
Relative Humidity 0~95% Non-condensing
Warranty 2 years
Standard Accessories:
Item Name Quantity
1 OTDR with FC Adapter 1pc
2 AC/DC power adapter 1pc
3 CD (including simulation analysis software) 1pc
4 Data line 1pc
5 SC adapter for OTDR port 1pc
6 User manual 1pc
7 Calibration Certificate 1pc
8 Carrying bag 1pc
9 Warranty Card 1pc
10 Network Cable Tracker 1pc
Optional Accessories:
Item Name Quantity
1 LC Adapter for OTDR Port 1pc
2 ST Adapter for OTDR Port 1pc
Ordering Information:
Model MAY400D
Power Meter A: -50~+26dBm (default)
B: -70~+10dBm
Connector None: FC/UPC and SC/UPC (default)

1. Manual

Operation Video

Test Short Fiber