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Old 04-17-2012, 03:56 PM #97
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Default Re: Tec popped off of Laserbee

While the heat transfer characteristics would change, they would do so consistently.... no?

What I mean is after the simple fix, it shouldn't be too difficult to establish, how much of a difference there is based on lasers of known power.

After that you're only dealing with simple arithmetic to correct for the deviation.

For example a known 500mW 405mW now reads 560mW... for 405nm the LPM is off by 12%. Same kind of measurements can be made for the other wavelengths, and I'm sure he has readigs from some of his lasers before.

It's by no means a perfect solution, and re-calibration would be better, but it is a cheaper one.

Possible I'm making some huge mistake in these assumptions, so please correct me if I am.

Edit... looks like Blord beat me by a minute



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Old 04-17-2012, 05:02 PM #98
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Question Re: Tec popped off of Laserbee

Quote:
Originally Posted by InfinitusEquitas View Post
While the heat transfer characteristics would change, they would do so consistently.... no?

What I mean is after the simple fix, it shouldn't be too difficult to establish, how much of a difference there is based on lasers of known power.

After that you're only dealing with simple arithmetic to correct for the deviation.

For example a known 500mW 405mW now reads 560mW... for 405nm the LPM is off by 12%. Same kind of measurements can be made for the other wavelengths, and I'm sure he has readigs from some of his lasers before.

It's by no means a perfect solution, and re-calibration would be better, but it is a cheaper one.

Possible I'm making some huge mistake in these assumptions, so please correct me if I am.

Edit... looks like Blord beat me by a minute
What I was kind of suggesting before I was told it wasn't a "simple" fix. How much more complex could it be? I mean if the calibration is an actual reprogramming.... btw, why would one want to build in non-user adjustable calibration into a meter anyways? kind of scratching my head here.
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Old 04-17-2012, 05:25 PM #99
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Default Re: Tec popped off of Laserbee

Quote:
Originally Posted by Seoul_lasers View Post
What I was kind of suggesting before I was told it wasn't a "simple" fix. How much more complex could it be? I mean if the calibration is an actual reprogramming.... btw, why would one want to build in non-user adjustable calibration into a meter anyways? kind of scratching my head here.
I'm guessing to cut down on production cost. Obviously from a business standpoint you also insure people will come back to you. (Standard practice - just think about how many custom adapters there were for cell phone chargers until recently.)

Would be awesome if it was possible to calibrate via USB/Computer interface itself.
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Old 04-17-2012, 05:31 PM #100
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Default Re: Tec popped off of Laserbee

Quote:
Originally Posted by Seoul_lasers View Post
What I was kind of suggesting before I was told it wasn't a "simple" fix. How much more complex could it be? I mean if the calibration is an actual reprogramming.... btw, why would one want to build in non-user adjustable calibration into a meter anyways? kind of scratching my head here.
I think he mentioned cost saving.

Cause a who wants to waste 50 cents on a potentiometer.
JK

I don't really know, laserbee would have to answer that.
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Old 04-17-2012, 05:34 PM #101
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Default Re: Tec popped off of Laserbee

Quote:
Originally Posted by InfinitusEquitas View Post
I'm guessing to cut down on production cost. Obviously from a business standpoint you also insure people will come back to you. (Standard practice - just think about how many custom adapters there were for cell phone chargers until recently.)

Would be awesome if it was possible to calibrate via USB/Computer interface itself.
It is user calibrateable though.

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Old 04-17-2012, 05:43 PM #102
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Default Re: Tec popped off of Laserbee

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Originally Posted by Trevor View Post
It is user calibrateable though.

Trevor
Not to most people... PM incoming on a different matter btw
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Old 04-17-2012, 05:48 PM #103
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Default Re: Tec popped off of Laserbee

So, since it has to be recalibrated after reaffixing the sensor TEC, and the readings will be somewhat off until then, instead of dealing with off readings we recommend you use the more accurate method of power measurement until your meter is repaired:


Don't worry, it is much better than using an LPM that only gives results that are close to right.
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Old 04-17-2012, 05:56 PM #104
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Default Re: Tec popped off of Laserbee

He guys I have a nice 445 build for sale
it LPMs at 2500 B/H (that is baloons per hour)
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Old 04-17-2012, 11:04 PM #105
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Default Re: Tec popped off of Laserbee

Quote:
Originally Posted by Seoul_lasers View Post
Ah... I forgot we're talking about a usb device and not the PIC based
Laserbees that use RS232 ports.


as far as putting the TEC back on, sliver epoxy (arctic silver), and or 3M silver epoxy isn't good enough to use?
I though it was some of the best thermo epoxies on the market for sinking?
Just trying to make a suggestion, because the person who bought this LPM doesn't want to spend/invest the money to have someone fix it.
................................. shrug.. shrug ... ????
Sorry but you are 3 for 3... incorrect again..

The LaserBee 2.5W USB IS a PIC based product and it DOES use
an RS-232 Port that is converted to USB in the unit ...

Quote:
Originally Posted by Seoul_lasers View Post
What I was kind of suggesting before I was told it wasn't a "simple" fix. How much more complex could it be? I mean if the calibration is an actual reprogramming.... btw, why would one want to build in non-user adjustable calibration into a meter anyways? kind of scratching my head here.
As I already stated in post #93 it was to reduce production costs.

If you wanted a Shop Calibration Interface for the budget entry level
LaserBee 2.5W USB we could put one together for you for ~$300.00
if you bought two...

Quote:
Originally Posted by InfinitusEquitas View Post
I'm guessing to cut down on production cost.
Exactly............. The LaserBee 2.5W USB is a budget entry level
LPM. This was one of the ways to bring the costs down.

Quote:
Originally Posted by Trevor View Post
It is user calibrateable though.

Trevor
It is Shop calibrateable.....

Quote:
Originally Posted by BShanahan14rulz View Post
So, since it has to be recalibrated after reaffixing the sensor TEC, and the readings will be somewhat off until then, instead of dealing with off readings we recommend you use the more accurate method of power measurement until your meter is repaired:


Don't worry, it is much better than using an LPM that only gives results that are close to right.
.... I like how you think....


Jerry

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Old 04-18-2012, 05:22 AM #106
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Default Re: Tec popped off of Laserbee

Quote:
Originally Posted by lasersbee View Post
Sorry but you are 3 for 3... incorrect again..

The LaserBee 2.5W USB IS a PIC based product and it DOES use
an RS-232 Port that is converted to USB in the unit ...



As I already stated in post #93 it was to reduce production costs.

If you wanted a Shop Calibration Interface for the budget entry level
LaserBee 2.5W USB we could put one together for you for ~$300.00
if you bought two...



Exactly............. The LaserBee 2.5W USB is a budget entry level
LPM. This was one of the ways to bring the costs down.



It is Shop calibrateable.....



.... I like how you think....


Jerry
Ok, so it is pic based. Great.
Again I fail to see why calibration can't happen in the software? Not totally understanding this.
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Old 04-18-2012, 05:28 AM #107
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Default Re: Tec popped off of Laserbee

Quote:
Originally Posted by justinjja View Post
Yay, 95$ + shipping to fix an lpm I bought for 90$
well, do you have any lasers that you just measured right before it broke?

reattach the tec and see if it measures the same.

you have to pay for the repair anyways, so why not fix it till it's broke
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Old 04-18-2012, 05:37 AM #108
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Thumbs up Re: Tec popped off of Laserbee

Quote:
Originally Posted by Mohrenberg View Post
well, do you have any lasers that you just measured right before it broke?

reattach the tec and see if it measures the same.

you have to pay for the repair anyways, so why not fix it till it's broke
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Old 04-18-2012, 12:23 PM #109
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Default Re: Tec popped off of Laserbee

Quote:
Originally Posted by Mohrenberg View Post
well, do you have any lasers that you just measured right before it broke?
reattach the tec and see if it measures the same.
you have to pay for the repair anyways, so why not fix it till it's broke
It is "broke" it doesn't measure correctly...
He said he already re-attached it and it is reading low..

To apply the Sensor correctly it needs pressure on the Sensor which
means the Coating may have been compromised. We coat our Sensor
after they are attached. It is also very important to have a thin layer
of Thermal Epoxy between the Sensor and Heatsink...

The Thermopile head is a sensitive accurate measuring device when
assembled correctly.

In the mean time as was already suggested a few times... the OP
can compare the readings with earlier measurements (he did have
the LPM for 4 months before he broke it) and use that difference on
any measurements after his re-attachment.

It would not be accurate but in the ballpark...

Quote:
Originally Posted by Seoul_lasers View Post
Ok, so it is pic based. Great.
Again I fail to see why calibration can't happen in the software? Not totally understanding this.
As has been stated numerous time already... It DOES happen in
Software/Firmware but you need a Shop Interface to be able to
do any calibration to keep the production costs down...

When you design... manufacture and sell your own products YOU
can decide the way you will do things...


Jerry

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Last edited by lasersbee; 07-01-2012 at 01:12 PM. Reason: Spelling errors
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Old 04-18-2012, 01:45 PM #110
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Cool Re: Tec popped off of Laserbee

Quote:
Originally Posted by lasersbee View Post
It is "broke" it doesn't measure correctly...
He said he already re-attached it and it is reading low..

To apply the Sensor correctly it needs pressure on the Sensor which
means the Coating may have been compromised. We coat our Sensor
after they are attached. It is also very important to have a thin layer
of Thermal Epoxy between the Sensor and Heatsink...

The Thermopile head is a sensitive accurate measuring device when
assembled correctly.

In the mean time as was already suggested a few times... the OP
can compare the readings with earlier measurements (he did have
the LPM for 4 months before he broke it) and use that difference on
any measurements after his re-attachment.

It would not be accurate but in the ballpark...



As has been stated numerous time already... It DOES happen in
Software/Firmware but you need a Shop Interface to be able to
do any calibration to keep the production costs down...

When you design... manufacture and sell your own products YOU
can decide the way you will do things...


Jerry
hey, I was only asking for clarification. No need to shoot the messanger. You're not under attack by the Rabid Kenometer clan.. I'm just a bystandard.
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Old 04-18-2012, 05:04 PM #111
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Default Re: Tec popped off of Laserbee

I am a human LPM. You can rent me for $25/hr.

Just shine the laser on the wall next to me, and i'll hold up a piece of paper with the output

Guaranteed accurate +/-500mW
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Last edited by Mohrenberg; 04-18-2012 at 05:04 PM.
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Old 04-18-2012, 05:09 PM #112
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Default Re: Tec popped off of Laserbee

Do you come with a spectrometer attachment too?

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Last edited by justinjja; 04-18-2012 at 05:10 PM.
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