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liquid sample.
6. Depress the READ button and record the digital reading which
appears in the display window.
If the reading differs from the value printed on the test glass by
more than ±0.0001, repeat the measurement several times.
Clean the measuring prism and test glass surfaces with alcohol,
followed by water after each test.
If an error persists, make the following adjustment:
7. Turn the shadow line adjustment control slightly and depress
the READ button. Repeat this procedure until the display agrees
with the test glass value.
The shadowline will now be above or below the center of the
crosshair reticle.
8. Insert the Allen wrench through the reticle access hole in the dis-
persion correction wheel. Adjust the reticle until the shadow line
passes through the center of the crosshair (Figure 2 & Figure 3a).
The instrument is now calibrated.
10.0 ILLUMINATOR BULB REPLACEMENT
The illuminator bulb can be replaced by removing the condenser
sleeve (Figure 6). Always use the suggested replacement bulb
(Catalog No. 13104620, pkg. of 3) for maximum efficiency and
safety. After inserting a new bulb, the socket can be adjusted to
center the light on the measuring prism with the condenser
sleeve in place. If necessary, push down on the spring-loaded
condenser sleeve lock pin and slide back and forth until the pin
snaps into place.
DAANGER
: The glass envelope of the bulb may be extremely
hot. Do not attempt to change the bulb before it is completely
cooled or without wearing protection.
WAARNING
: Unplug the refractometer power cord before
attempting to replace the illuminator bulb.
English
Main Control Board
(November 1992)
WWiirriinngg KKeeyy CCoolloorr CCooddee
W = White
B = Black
G = Green
O = Orange
R = Red
y = Yellow
11331100449944--992244
Not Used
Thermistor Plug
RS232 Plug
(active on 13104940, 13104950)
Not Used
Limit Switch
Baud Rate Switch
Power
Motor
FFiigguurree 55
!
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