How to select optical power meter in welding machine maintenanceadmin
For welding machine maintenance optical power measurement is essential.According to the specific application of the user to select suitable optical power meter, should pay attention to the following points:
1, select the most optimal probe type and interface type
2, evaluation of calibration precision and manufacturing procedures, scope of fiber and joint requirements with you.
3, make sure the model consistent with your measuring range and display resolution.
4, insertion loss measurement directly, have the dB functions.
Almost all performance in optical power meter, OTDR maintenance optical probe is one of the most should be carefully selected parts.Optical probe is a solid state photoelectric diode, light it receives from the optical network coupling, and converted to electrical signals.Can use special connector interface (a connection type) is only input to the probe, or use the common interface UCI (using the screw connection) adapter.UCI can accept most of the industry standard connector.Based on the selected wavelength calibration factor, optical power meter circuit to convert sensor output signal, the reading light power in dBm way display (absolute dB is equal to 1 mW, 0 dBm = 1 mW) on the screen.
Choose the optical power meter is the most important standards to probe light types match the expected work wavelength range.Be worth what carry is, as measured in InGaAs in three transfer window has a good performance, compared with germanium InGaAs has in all three Windows more flat spectrum characteristic, in the 1550 – nm window has a higher measuring precision, at the same time with superior temperature stability and low noise characteristics.
The next factor is closely related to the calibration accuracy.Power meter is consistent with your application way of calibration?I.e., the optical fiber and the performance of the connector standard is consistent with your system requirements.What causes should be analyzed using different connection adapter measurement uncertainty?Give full consideration to other potential factors of error is very important, while NIST (American national standards institute of technology) established the American standards, but from different manufacturers of similar type of light source, optical probe, the frequency spectrum of the connector is uncertain.
Determine in accordance with your demand of optical power meter measuring range models.In dBm units, measurement range (range) is a comprehensive parameters, including the minimum/maximum range of input signal (such optical power meter can guarantee the accuracy of all, linearity (BELLCORE is + 0.8 dB) and resolution (usually 0.1 dB or 0.01 dB) whether meet the application requirements.
Light is the most important selection criteria of optical power meter probe types match the expected scope of work.
Most of the optical power meter have the dB function (power), light loss directly read very practical in the measurement.Low cost of optical power meter usually do not provide this functionality.No dB functions, technical personnel must take note of a separate reference value and measured value, and then calculate the difference.So the dB function for relative loss measurements to users, and thus increase productivity, reduce the artificial calculation error.
Optical power meter now, users have the choice of the basic features and functions have been reduced, however, some users to consider the special requirements, including: computer acquisition data record, external interface, etc.