Lpm

[blakegriffin]

Hi every one, my new lpm should be arriving tomorrow or the next day. I have a question on an lpm. Does it tell you the power by reading the heat that your laser makes? Also how should I focus the laser beam in the censor should it be to a pinpoint?

 

[joshshermannn1]

what LPM did you get? there are different kinds of sensors, DONT focus it a pinpoint. it will ruin your lpm...

 

[blakegriffin]

Radiant electronics alpha meter

 

[joshshermannn1]

nice! i want one of those... to be honest i would direct you to laserbee, he knows way more than anyone about LPM's. thermophile sensors are heat sensers IIRC.

 

[lasersbee]

Hi every one, my new lpm should be arriving tomorrow or the next day. I have a question on an lpm. Does it tell you the power by reading the heat that your laser makes? Also how should I focus the laser beam in the censor should it be to a pinpoint?

That information should be detailed in the User Instructions
that should be supplied with your LPM..

nice! i want one of those... to be honest i would direct you to laserbee, he knows way more than anyone about LPM's. thermophile sensors are heat sensers IIRC.

Thermopiles actually measure heat differentials...
That's not the same as a thermometer...

Jerry

 

[MarioMaster]

Right. The meter works by measuring the heat flow from the sensor face to the heatsink.

Do NOT focus your laser to a pinpoint. Doing so will likely burn the coating and damage the sensor. Focus the laser either to infinity (small dot on a far wall) or expand it slightly. Make sure the entire dot is hitting the sensor.

 

[blakegriffin]

Ok thank you MarioMaster. +1 for great service.

 

[DTR]

Here this should help you keep from burning your sensor. Just because it is not focused to a pinpoint on the wall 5 feet away does not mean it wont be if you put it on your sensor. Focus the laser past Infinity(using that term lightly).:beer:

 

[blakegriffin]

Thanx DTR the graph is very helpful.

 

[lasersbee]

A trick we use in the Shop is to have a 2nd non Sensor
mounted Radiator beside the Thermopile sensor and
adjust the Laser's beam on it.
Then when the diameter of the Laser's beam is within
specs stated in our User Instructions we move the beam
over to the Thermopile Sensor.

@ DTR..
Good way of showing the possible wrong focus on a sensor
by using the focusing at a distance method... :gj:


Jerry