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Optical Power Meter
Optical Power Meter

GAO Tek Fiber Optical Power Meter

ID: C0260010tek

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Product Description


GAOTek handheld optical power meter is a compact and an easy-to-use testing instrument for optical fiber networks, which can be used for optical power measurements as well as for relative loss measurements in optical fiber. It provides a wide range of power measurement, high accuracy, and user self-calibration function with the high performance-to-price ratio. It can be applied for maintenance and testing in telecom, CATV, and fiber optics.

Key Features

  • User self calibration functions
  • Comfortable LCD display and optional backlight LCD display supports.
  • Night operation.
  • Power measurement in dBm or mW and insertion loss in dB
  • Low battery consumption, more than 240 hours continuel operation time for three 1.5 V alkaline batteries.
  • Optional 10 minutes Auto-off functions

Technical Specifications

Wavelength 2.56 in x 10-5 ~ 6.49 in x 10-5 (650 nm~1650 nm)
Detector InGaAs
Measurement Range -70 dBm ~+1 0 dBm -50 dBm~ + 26 dBm
Uncertainty +5%
Calibrated Wavelength 3.34 in x10-5 in, 3.86 in x 10-5in, 5.12 in x 10-5, 5.15 in x 10-5, 5.15 in x 10-5, 5.87 in x 10-5in, 6.10 in x 10-5in, 6.40 in x 10-5 in, 980 nm,1300 nm,1310 nm,1490 nm,1550 nm,162 5nm
Resolution Linear 0.1 or Non-linear 0.01 dBm
Optical Connector FC/universal 2.5 mm adapter(FC,SC,ST interchangeable connector can be optional)
Power supply Alkaline Battery (3 AA1.5V Batter(3)
Operating Temperature -14 ◦F to 140 ◦F (-10 C to 60 C)
Storage Temperature -13 ◦F to 158 ◦F (-25 C to 70 C)
Relative Humidity 0 to 95% (non-condensing)
Dimension 5.98 in x 2.94 in x 1.02 in (152 mm  x 74 mm x 26 mm)
Weight 0.66 lbs (290 g)

Function Description

  1. LCD

It displays the optical power measurement results in forms of dB, dBm,mW,uW,nW, the set wave length is 850nm, 950nm,1310nm,1550nm,1625nm.

  1. On/Off

To power on the meter, press and hold ON/OFF till information appears in LCD, while in power on state, press the key to power off the meter.

  1. dB

Measure relative optical power under preset wave length.

  1. Zero

Press this key to zero the optical power meter.

  1. Light

Press this key to turn on/off the back light of LCD

  1. ^

Press ^ key to select wave length, there are six wave length, i.e. 850 nm, 950 nm, 1 300 nm, 1310 nm, 1490 nm, 1550 nm for your choice, their values will appear in LCD

  1. Auto Off

Press this key to enable or disable AUTO-OFF function of the meter

Operating Instructions:

Power on/off

  • Press and hold On/Off on the panel till information appears in LCD
  • Press On/Off on the panel, information disappears from LCD, the meter is powered off

Measure absolute optical power

  • Power on the optical power meter
  • Set wavelength to be measured, press ^ key to select wave length, the default wavelength will be 1310 nm
  • Connect in the light to measured, the values that screen shows are current measurement results, including linear and non-linear power value

Measure relative optical power

  • Set wavelength to be measured
  • Connect in the light to measure while in absolute measurement mode, get current power value
  • Press dB key, current optical power value will become current reference value ( in unit of dBm)
  • Connect in another light to be measured, the absolute optical power value and optical power value of current light will appear in the screen

Special Functions

  • The product provides three modes, i.e. factory mode, user mode and working mode, it usually enter to a working mode
  • The measurement and calibration are made by the factory so it comes under factory mode
  • In User mode press ^+Light together and the system will enter to the user mode and the “nm” will disappear from the end of the first line. Press ^+Light together again to exit from the user mode and enter into the working mode, the ‘nm’ will appear the end of the first line.

Key Functions

Functions Keys
Increase by 0.05 Light
Decrease by 0.05 dB
Save Zero
Change wave length ^
Reset default settings ^+Zero

Remarks: In the event, error occurs when user calibrates or operates the meter himself, he can press^+Zero together while in user mode to reset default settings.

10 minutes auto off

Press AUTOOFF to enable Auto Off function, the icon “Off” will appear on the left top of the screen, and then the meter will automatically turn off if there are no operations within 10 minutes.

LED backlight ON/OFF

While in working mode, press Light to turn on backlight, the symbol ‘a little sun’ will appear on the left top of the screen indicating backlight is on.

Serial port commissioning

Connect serial port plug to PC’s serial port, you can access data and calibrate the meter via PC.


While in normal working the power volume indicator will not appear in the screen, however, when the battery is going to run out, the power volume indicator will blink once a second, the meter will automatically power off after the indicator blinks for ten times, if so, you can insert the meter into supplied charger for charging, this way saves a log of trouble and cost in replacing battery.


Regularly clean the end of sensor, keep it free of grease, dirt. Do not use dirty, nonstandard connector. Do not insert in poor polishing condition, otherwise the sensor’s end may be damaged, and the performance of entire system may degrade.

Use only one adapter if possible

If you are not going to use the tester for the time, cover the dust-proof cap immediately and keep the end clean. Long-time exposure in air may gather dust therefore decrease the chances of measurement accuracy.

Plug and unplug the adapter with care, do not leave any scratches on the port

Regularly clean the surface of sensor, when cleaning the sensor, please gently wipe the surface using cotton swab by circling the perimeter


Fault description Diagnosis Solution
LCD image is weak Power is insufficient Charge the meter
No display after power on Power is insufficient/other reason Restart/charge the meter
No charge of a little charge in LCD readings Optical adapter’s connector is faulty or contaminated/display is locked Check whether the optical adapter’s connector is properly connected, clean the terminal of sensor

Reasons are not included warranty

  • The product has been repaired or modified without the authorization of the manufacturer

Fault arising of improper use, negligence or incidence