MAY422 Mini OTDR

MAY422 Mini OTDR - Front View
MAY422 Mini OTDR - Back
MAY422 Mini OTDR - Standard Accessories

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)

MAY422 Mini OTDR integrates fiber cable and Ethernet cable testing in one unit. It is a powerful tester for installers of fiber cable and network cable.


  • Support screen capature
  • Integrated design, smart and rugged
  • FC/SC/ST connectors interchangeable
  • Automatic and expert test function
  • OTDR Viewer software for data analysis
  • Cover plate type tempered glass panel, no worry about screen scratch
  • Sink type optical port design for better protection
  • Support USB Type C export data protection
  • Intelligent power saving management


  • CATV network testing
  • Access network testing
  • LAN network testing
  • Laband Factory testing
  • FTTA troubleshooting

1. Auto OTDR
There is no need to do complicated settings, one button operation.
2. Expert OTDR
It provides professional measurement and displays curve, list and map simultaneously.
3. Event Map
Event Map is similar to EXFO’s iOLM function, which can display events in user-friendly icons.
4. Optical Power Meter (OPM)
5. Visual Fault Locator (VFL)
Visual Fault Locator uses red laser of 650nm to locate broken fiber point and test fiber continuity.
6. Optical Light Source (Laser Source)
7. Optical Loss Test
OPM and OLS can be opened at the same time to test insertion loss.
8. RJ45 Sequene, RJ45 Length
It can check wire map, and measure the length of RJ45 cable.
9. RJ45 Digital Tracker
It can trace and locate the RJ45 network cable via digital rader with the features of stronger anti-jamming ability.
10. Endface Inspector
Endface Inspector is used to check fiber optic connector endface. The inspection probe is sold seperately.
11. File Management
It can provide “computer-level” file management.
12. LED light

Model MAY422-D26 MAY422-S26F① MAY422-S24F②
Wavelength 1310/1550nm 1310nm with filter 1550nm with filter
Dynamic Range③ 26/24dB 26dB 24dB
Fiber Type SMF
Event Dead Zone④ 2.5m
Attenuation Dead Zone 8m
Measurement Range 500m, 1km, 2km, 4km, 8km, 16km, 32km, 64km, 100km
Measurement Pulse Width 3ns, 5ns, 10ns, 20ns, 30ns, 50ns, 80ns, 160ns, 320ns, 500ns, 800ns, 1us, 2us, 3us, 5us, 8us, 10us, 20us
Ranging Accuracy ±(1m + Sample interval + 0.005%×Test distance)
Sampling Resolution 0.05m~8m
Samping Points 128,000 points
Linearity ≤0.05dB/dB
Loss Threshold 0.2dB
Loss Resolution 0.001dB
Range Resolution 0.001m
Refraction Setting 1.00000~2.00000
Refraction Accuracy ±3dB
File Format SOR standard file format
Laser Safety Level Class II
Adapter FC (Interchangeable SC adapter)
Multi-Languages English, Russian, Spanish, French, Arabic, Hindi, Vietnamese, Portuguese
①MAY422-S26F with 1310nm with filter can do online testing for live fiber with 1490/1550nm signal. (optical power: ≤-5dBm)
②MAY422-S24F with 1550nm with filter can do online testing for live fiber with 1310/1490nm signal. (optical power: ≤-5dBm)
③Testing temperature is 25°C±2°C, maximum pulse width, average time is more than 3 minutes.
④Test 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)
Tone Detection CW, 270, 330, 1k, 2kHz
Resolution 0.01dB
Uncertainty ±5%
Auto Wavelength Recoginition Support
Connector Universal 2.5mm (FC/SC/ST)
3. Optical Light Source
Emitter Type FP-LD
Working Wavelength Same as OTDR
Output Power ≥-5dBm
Modulation Frequency CW/270/330/1k/2kHz
Accuracy CW, ±0.5dB/15min (Test after 15 minutes of preheating)
Auto Wavelength Recoginition Support
Connector FC (Interchangeable SC adapter)

3.1. The wavelength of Optical Light Source is the same as OTDR wavelength.
3.2. Optical Light Source shares the same fiber port as OTDR port.

4. Visual Fault Locator
Wavelength (±20nm) 650nm
Power ≥10mW
Mode CW/1Hz/2Hz
Laser Safety Level Class III
Connector Universal 2.5mm (FC/SC/ST)
5. RJ45 Sequene, RJ45 Length
Test Range 300m
6. RJ45 Digital Tracker
Mode Digital tracking
Online/Line Pair Tracking Support
Test Range 300m
Other Specification:
Display 4.3 inch full-view capacitive touch screen, support multi-touch, TFT 800×480 resolution
Power Supply AC/DC adapter: input: AC: 100~240V, 50/60Hz, 5V, 0.6A; output: 5V, 2A. Lithium battery: 3.7V 4,000mAh
Battery Standby Life ≥20h
Battery Working Hours ≥12h
Data Interface USB Type C
Data Storage 100,000 curves; 8G internal storage
Weight 500g (including battery)
Size 173*109*45mm
Operating Temperature -10 ~ +50°C
Storage Temperature -40 ~ +70°C
Relative Humidity < 95% Non-condensation
Standard Accessories:
Item Name Quantity
1 OTDR with FC adapter for OTDR/LS port, Lithium battery and Simulation analysis software 1pc
2 AC/DC power adapter 1pc
3 Data line 1pc
4 SC Adapter for OTDR port 1pc
5 User manual 1pc
6 Calibration Certificate 1pc
7 Soft Bag with shoulder strap 1pc
8 Network Cable Tracker 1pc
9 Warranty card 1pc
Optional Accessories:
Item Name Quantity
1 LC Adapter for OTDR port 1pc
2 ST Adapter for OTDR port 1pc
Ordering Information:
Model MAY422
Wavelength and Dynamic Range D26: 1310/1550nm, 26/24dB
S26F: 1310nm with filter, 26dB
S24F: 1550nm with filter, 24dB
Power Meter A: -50~+26dBm (default)
B: -70~+10dBm
Connector None: FC/UPC and SC/UPC (default)

1. Manual

MAY422 Mini OTDR - Home


MAY422 Mini OTDR - Auto OTDR Module

Auto OTDR Module

MAY422 Mini OTDR - Expert OTDR Module

Expert OTDR Module

MAY422 Mini OTDR - Expert OTDR Module - Event List

Expert OTDR Module – Event List

MAY422 Mini OTDR - Expert OTDR Module - Event Map

Expert OTDR Module – Event Map

MAY422 Mini OTDR - Event Map Module

Event Map Module

MAY422 Mini OTDR - OPM Module

OPM Module

MAY422 Mini OTDR - VFL Module

VFL Module

MAY422 Mini OTDR - Laser Source Module

Laser Source Module

MAY422 Mini OTDR - Optical Loss Test Module

Optical Loss Test Module

MAY422 Mini OTDR - RJ45 Sequence Module

RJ45 Sequence Module

MAY422 Mini OTDR - RJ45 Length Module

RJ45 Length Module

MAY422 Mini OTDR - RJ45 Digital Tracker Module

RJ45 Digital Tracker Module

MAY422 Mini OTDR - File Management Module

File Management Module

MAY422 Mini OTDR - File Management Module - English Folder

File Management Module – English Folder

MAY422 Mini OTDR - File Management Module - Saved Curve

File Management Module – Saved Curve

MAY422 Mini OTDR - File Management Module - Snapshot

File Management Module – Snapshot

MAY422 Mini OTDR - System Module

System Module

MAY422 Mini OTDR - Save settings

Save settings