Mercury Battery Loading - Canon FT QL Instructions Manual

Mercury Battery Loading
Load the mercury battery into the battery com -
partment. The mercury battery powers the
built-in CdS exposure meter, and the meter will
not function unless the battery is in position .
1 Press the finger against the battery cover
and turn to the left to remove.
2 Face the central contact of the mercury
battery inwards and insert, then screw the
cover back in.
.. Before insertion , clean mercury battery
thoroughly with a dry cloth . Perspiration or
finger marks may cause corrosion and may
prove particularly harmful to center of contact.
An unclean battery may also damage the con -
tact point of the camera .
8
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Cen t ra l Conta ct
.. For mercury battery , National M-10 or
Toshiba TH -MC is used-equivalent to Mallory
RM-625R, Eveready E625N, GE
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625 . Life of
the battery in continuous use is approximately
one year. When inserting, do not confuse the
EB
e.
Not only will the meter fail to function
in case of reverse insertion, but the cover
cannot be screwed in properly .
.. When not in use for a long period , remove
the mercury battery and keep in a dry place .
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Battery Check
Check the mercury battery after loading it.
Especially when loading a new battery, be sure
to check the voltage.
1
Set the film speed graduation of the shutter
dial at ASA 100 and set " X" at the index
mark . Lift up the outer sensitivity ring of the
shutter dial and turn. See page 16.
.. An accurate check cannot be made if set -
tings other than those mentioned above are
used.
2
3
Needle
Sufficient o
t ____ _
~
Insuffi c ient
( Nee d to repla ce)
Turn the check lever on the outer side of
the film rewind knob to " C" index.
If the meter needle inside the viewfinder
swings up to or over the o index, it means
there is sufficient voltage. If the needle stays
below the edge of the o index, voltage is insuf-
ficient and the battery must be replaced .
.. In the Canon FT QL, the electric current flows
only when the CdS actuating lever is pressed .
~