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Article #7775

Re: K-Ar laser lifespan

#7775
From: Brett Schroeder
Date: Fri, 12 May 1995 00:00
70 lines
3846 bytes
I would have to question why the Anode current levels are so high even when
the laser was first read after receiving it. Every time that a laser has
been installed at this institution, the starting Anode current has been from
what I have seen since I have been here, around 67.6 mW to 78 mW. When the
laser was noted to be failing was when the Anode voltage reached approx. 90+
mW. So starting at the 90 mW level seems high for a 15mW laser. Am I right?
Or is the upper 80's to 90 a normal starting point?

Also, I was looking through the records here and I came across a spec sheet
for an ILT laser from 1993 and it had the laser listed as a 20 mW laser
output. When did ILT change to the 15mW instead?


>this was a replacment laser (#10121077) while ours was being 'repaired'
>date            hours   LCV     ACmv
>11-11-94        4       3.1     90-92
>15-11-94        7       3.1     91-92
>17-11-94        10      3.1     88-97
>21-11-94        11      3.1     89-90
>25-11-94        14      3.1     92-95
>28-11-94        16      3.1     90-92
>29-11-94        21      3.1     92-98
>30-11-94        26      3.1     96-97
>01-12-94        28      3.1     94-101          no red line
>01-12-94        29      3.1     94-96           when LCV 2.4
>02-12-94        32      3.1     94-95
>07-12-94        34      3.1     93-96
>08-12-94        37      3.1     92-98
>12-12-94        40      3.1     93-96
>13-12-94        42      3.1     92-93
>14-12-94        44      3.1     93-96
>15-12-94        47      3.1     92-95
>16-12-94        51      3.1     93-94
>19-12-94        54      3.1     93-99
>21-12-94        57      3.1     92-95
>26-01-95        64      3.1     96-97
>07-02-95        68      3.1     98-100
>09-02-95        73      3.1     98-100
>20-02-95        79      3.1     98-101
>07-03-95        87      3.1     98-99
>08-03-95        89      3.1     >101           NO RED
>09-03-95        91      2.7     93-94
>14-03-95        95      2.7     97-101
>15-03-95        99      2.7     95-96
>
>
>ours returns (unfortunately hours not recorded, but this was first 47 hrs)
>21-03-95                4.0     81.5
>22-03-95                4.0     83-86          poor green line
>23-03-95                4.0     85.5-86.5       "
>27-03-95                4.0     86-88           "
>28-03-95                4.0     89-93           "
>31-03-95                4.0     92.5-95        NO GREEN
>04-04-95                4.0     94              "
>06-04-95                4.0     94-95           "
>07-04-95                4.0     94.5            "
>10-04-95                4.0     93              "
>11-04-95                4.0     91-94           "
>08-05-95                4.0     94.5            "
>11-05-95                4.0     87-88          GREEN RETURNS!
>
>
>cheers,
>Danny Thomas  (D.Thomas@vthrc.uq.edu.au)
>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Brett Schroeder                            8701 Watertown Plank Road +
+ Dept. of Cellular Biology & Anatomy     Milwaukee, WI 53226-4801 USA +
+ Medical College of Wisconsin                          (414) 456-8504 +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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From: Brett Schroeder <schroedb@ITS.MCW.EDU>
Subject: Re: K-Ar laser lifespan
Date: 1995/05/12
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