From: Judy Seigel (jseigel@panix.com)
Date: 12/26/00-12:40:30 AM Z
Following advice of Ed Stander & Carl Weese I did test my little
hygrometer -- as follows:
Took a nice sturdy clear plastic bowl from overpriced Chinese takeout, put
a scoop of salt in the bottom plus a couple of ounces of water (say 100
cc), stood a shot glass upside down in the center, and taped the little
instrument on top of that with gaffer's tape (grill down), then taped on
the bowl cover and left for two hours.
After which, prying off the tape (that is STICKY stuff), I found the meter
read -- PRECISELY 75 % ! But then after an hour at room humidity, the 75%
didn't change, whereupon I noticed that the window read "max" -- meaning
programmed (I assume) to hold maximum reading. Pressing Reset, I got 40%
instantly (winter steam heat is on, & despite 12-gallon-a-day humidifier,
it's DRY), now down to 34%, as room went from 67 F to 70. (It's 18 degrees
outdoors.)
As it happens, the previous "cuckoo" behavior was along these lines. I'd
left instrument in John D's refrigerator to see how he was keeping his
coated cyanotype paper -- and it didn't come back to summer reality until
similarly noodled. (Can I help it if the thing arrived with NO
instructions?)
Being out of lithium chloride (is that what they give for manic
depression?) I'm taking the zero point on faith.
Thanks much.
PS. Another really nice feature is that knocking the thing on the floor
(VERY crowded studio) doesn't break it (or hasn't yet).
Judy
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| World Journal of Post-Factory Photography > "HOW-TO and WHY"
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