Hi Joice!

The answer above doesn't look sleek and rather redundant, but it does give you an idea about what this phrase indicates. Alarm parameters are a set of conditions which trigger an alarm when met. There could be a number of elements, and once configured they are stored in this circuit. I believe that 解除 here indeed means resetting these parameters.

I may say "reset the circuit that holds/stores alarm parameters" or "reset the parameter (holding) circuit" something like that if this particular circuit is described elsewhere.

guessing

This is a literal translation.

保持回路＝retaining circuit
http://www.google.com/search?hl=en&q=retaining circuit, gas ...

解除＝release

回路解除＝circuit release
http://www.google.com/search?q= circuit release&hl=en&start=...

警報要因＝ alarm parameters
http://www.google.com/search?hl=en&q= alarm parameters&btnG=...

Parameters(Engineering)
In engineering (especially involving data acquisition) the term parameter sometimes loosely refers to an individual measured item. For example an airliner flight data recorder may record 88 different items, each termed a parameter. This usage isn't consistent, as sometimes the term channel refers to an individual measured item, with parameter referring to the setup information about that channel.

"Speaking generally, properties are those physical quantities which directly describe the physical attributes of the system; parameters are those combinations of the properties which suffice to determine the response of the system. Properties can have all sorts of dimensions, depending upon the system being considered; parameters are dimensionless, or have the dimension of time or its reciprocal." John D. Trimmer, 1950, Response of Physical Systems (New York: Wiley), p. 13.

The term can also be used in engineering contexts, however, as it is typically used in the physical sciences.



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Note added at 2 hrs (2007-11-18 14:24:12 GMT)
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http://en.wikipedia.org/wiki/Parameter

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Note added at 4 hrs (2007-11-18 16:26:54 GMT)
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Call queue release control circuit
http://www.freepatentsonline.com/3975597.html

http://en.wikipedia.org/wiki/Release_engineering

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Note added at 5 hrs (2007-11-18 17:54:51 GMT)
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I think that the retaining circuit should be released first in order to reset alarm parameters that have already been stored in the circuit.




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Note added at 1 day22 mins (2007-11-19 12:42:47 GMT)
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I think [解除＝release] and [リセット＝reset] are different.

http://www.google.co.jp/search?hl=ja&q=保持回路を解除、リセット&lr=lang_...

http://www.google.com/search?hl=en&q=circuit reset, circuit ...

A [Reset] might precede a [Release], though.