-
7
-
OTHER FLUIDS
T h e A q u a - G l o W a t e r D e t e c t o r K i t c a n b e u s e d t o d e t e r m i n e t h e u n -
d i s s o l v e d w a t e r c o n t e n t o f f l u i d s t h a t a r e n o t i n t h e j e t f u e l
c a t e g o r y b u t t h e r e a r e s e v e r a l f a c t o r s t h a t m u s t b e c o n s i d e r e d .
F i r s t o f a l l , m a t e r i a l c o m p a r a b i l i t y o f t h e d e t e c t o r p a d h o l d e r
a n d i t s v a r i o u s c o m p o n e n t s m u s t b e s t u d i e d .
T h e q u i c k d i s c o n n e c t
n i p p l e i s m a d e o f T y p e 3 0 3 s t a i n l e s s s t e e l a n d t h e d e t e c t o r p a d
h o l d e r i t s e l f i s a n o d i z e d a l u m i n u m .
A l l o t h e r c o m p o n e n t s a r e
b r a s s .
S e a l s a r e B u n a N .
T u b i n g i s v i n y l .
C o m p o n e n t s m a d e o f
o t h e r m a t e r i a l s a r e a v a i l a b l e a n d w i l l b e q u o t e d o n r e q u e s t .
T h e s e c o n d c o n s i d e r a t i o n i s t h e d e t e c t o r p a d i t s e l f .
C e r t a i n
a l c o h o l s m a y r e m o v e t h e f l u o r e s c e i n c o a t i n g .
Strong chemicals
m a y d a m a g e t h e f i l t e r p a p e r p a d i t s e l f .
L o w b o i l i n g p o i n t f l u i d s c r e a t e s p e c i a l p r o b l e m s t h a t r e q u i r e
consideration.
First of all, t h e v o l u m e o f a f l u i d t h a t e v a p o -
r a t e s r a p i d l y c a n n o t b e d e t e r m i n e d i n t h e o p e n b o t t l e t h a t i s
provided in the kit. Several methods can be used, depending on
the test fluid.
O n e m e t h o d i s t o u s e a s a m p l e b o m b.
Another is
t o p l a c e a g r a d u a t e d c y l i n d e r i n a r e f r i g e r a t e d b a t h . Precautions
m u s t a l s o b e t a k e n t o p r e v e n t c o n d e n s a t i o n o f m o i s t u r e o n t h e c o l d
d e t e c t o r p a d a f t e r t h e p a d h a s b e e n r e m o v e d f r o m i t s h o l d e r . A n
e f f e c t i v e w a y t o h a n d l e t h i s i s t o i m m e d i a t e l y d r o p t h e p a d i n a
beaker containing clean, dry kerosene.
T h e u s e o f k e r o s e n e a s a
“conditioner” i s r e q u i r e d w h e n e v e r a t e s t i s t o b e p e r f o r m e d o n
a n o n - j e t f u e l f l u i d .
T h e r e a s o n i s t h a t t h e c a l i b r a t i o n o f t h e
A q u a - G l o s c a l e i s b a s e d o n a j e t f u e l d a m p d e t e c t o r p a d .
H e a t i n g o i l a n d d i e s e l f u e l s h a v e a n a t u r a l f l u o r e s c e n c e t h a t c a u s e s
high readings.
A c c u r a c y c a n b e o b t a i n e d i f t h e r e s i d u a l o i l o n t h e
t e s t p a d i s r i n s e d o f f b y f l u s h i n g d r y k e r o s e n e t h r o u g h t h e p a d a f t e r
the test.
See the procedure under “Container Samples”.
A d e q u a t e
r i n s i n g w i l l r e s u l t i f t h e c a p a c i t y o f t h e s y r i n g e i s d r a w n t h r o u gh
the detector pad one or two times.
Additives in fuels,
including jet fuel, have variable effects on
readings.
Generally, heating fuel additives tend to mask the
presence of water,
but experience to date indicates that additives
in jet fuel tend to cause slightly high readings.
CARE OF THE COMPARATOR CHAMBER
The inside surfaces of the chamber must be kept clean.
Dust and
d i r t o f t e n g l o w s b r i l l i a n t l y i n u l t r a v i o l e t l i g h t a n d t h i s w i l l c a u se
a reading error.
To test for such dirt, turn on the light in a dark
room with the instrument pack removed.
Remove all glowing particles,
being careful not to scratch the black paint.
If particles cannot be
reached through the open port, remove the ultraviolet light, which is
held by 4 long screws.
T h e n r e m o v e t h e i r i s l e v e r a r m b y u n s c r e w i n g
i t .
T h e i n s e r t o n w h i c h t h e i r i s d i a p h r a g m i s m o u n t e d m u s t b e r e -
m o v e d w i t h g r e a t c a r e t o a v o i d s c r a t c h i n g t h e b l a c k p a i n t .
I t m a y b e
n e c e s s a r y t o g e n t l y p r y u p w a r d a t t h e e n d o p p o s i t e t h e i r i s a n d s h i f t
t h e i n s e r t t o w a r d t h a t e n d .
D o n o t m o v e o r r e m o v e t h e i r i s d i a p h r a gm
b e c a u s e i t h a s b e e n c a r e f u l l y p o s i t i o n e d a t t h e f a c t o r y a n d c a n n o t b e
a d j u s t e d i n t h e f i e l d .
N o t e t h a t t h e r e i s a s l i d i n g l i g h t s e a l Q n t h e i n s i d e o f t h e s l o t
w h e r e t h e i r i s l e v e r m o v e s .
B e s u r e t o r e p l a c e t h i s b l a c k p l a s t i c
p i e c e w h e n r e a s s e m b l i n g t h e c o m p a r a t o r c h a m b e r .
