My apologies if this question is a repeat.  I sent it once but did not see
it posted or see any response so I am trying again.

I have run across an internal specification which applies an equivalency
factor to the maximum allowable limit for an Omegameter 300 and an
Omegameter 600 - but NOT to the maximum allowable limit for an Omegameter
500.  In other words, the maximum permissible micrograms NaCl eq./sq.cm. for
the Omegameter 500 is less than that for the Omegameter 300 and Omegameter
600.   Can anyone explain the logic for this?  Is the Omegameter 500
different?

Thanks in advance for your help.

Mary M. Davis
Eldec
425-743-8327

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