Specifications:
Model: UT691B-30C / UT691B-30T
Power Measurement Range:
UT691B-30C: -50 to +30dBm
UT691B-30T: -70 to +10dBm
Wavelength Range: 700nm - 1700nm
Calibration Wavelengths:
850nm / 980nm / 1270nm / 1300nm / 1310nm / 1490nm / 1550nm / 1577nm / 1625nm / 1650nm
Tester Type: InGaAs
Optical Power Port: 2.5mm universal interface
Red Light Wavelength: 650nm ± 20nm
Red Light Output Power: 30mW
Accuracy:
UT691B-30C: ±0.4dB (1310nm, 1490nm, 1550nm, 1625nm), ±1dB (Other wavelengths)
UT691B-30T: ±0.2dB (1550nm, 1625nm), ±0.3dB (1310nm, 1490nm), ±1dB (Other wavelengths)
Resolution: 0.01dBm
LED Backlight Display: Supported
Battery: 1800mAh rechargeable lithium battery
Charging Port: Type-C
Operating Temperature: 0℃ to 50℃ in use; -45℃ to 0℃ when charging
Storage Temperature: -20℃ to 45℃
Dimensions: 170mm x 25mm x 25mm
Weight: Approx. 125g


Features:
1.Broad Measurement Range
Supports two models with different power measurement ranges: UT691B-30C (-50 to 30dBm) and UT691B-30T (-70 to 10dBm), suitable for various optical power scenarios and requirements.
2.Multiple Wavelength Calibration
Precisely calibrated for 10 common wavelengths including 850nm, 980nm, 1310nm, and 1550nm, ensuring compatibility with both single-mode and multi-mode fiber applications.
3.Versatile Red Light Modes
Features continuous and pulsed modes for red light output, enhancing long-distance fault visualization while conserving battery life.
4.User-Friendly Design
Equipped with a 2.5mm universal interface, LED backlight display, and rechargeable Type-C battery to provide superior usability for daily optical fiber testing tasks.
5.Compact and Rugged Construction
Lightweight (125g) and made with high-quality metal housing to meet portability demands while maintaining product integrity.

Package Included:
1 x UT691B Fiber Optic Engineering Pen
1 x User Manual
1 x USB Cable
1 x Storage Bag