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7.0 SYSTEM OPERATING FEATURES
DETERGENT CONTROLLER P.C. BOARD
Figure 7-1
7.1 Power Lights
The “POWER” light on the front of the unit is lit when the
this occurs, it may be necessary to locate an alternate power
source. The power light for the rinse injector is illuminated
whenever the rinse injector is operating.
7.2 Feed Light
This light will be illuminated whenever the wash tank con-
centration is BELOW the control set point.
7.3 100% Light
This light will illuminate whenever the wash tank concentration
is at, or above, the control set point, refer to Figure 7-1.
NOTE: This light will ash at the appropriate time the
wash solution should be titrated. This will verify the
desired control set point.
7.4 Temperature Compensation
The concentration of the dissolved detergent in the wash
the conductivity signal produced by a given concentration
varies noticeably with water temperature. In general, the
higher the wash tank temperature, the higher the conductiv-
ity signal. This can cause the detergent controller to feed
less detergent product when the wash tank temperature
increases and more when it decreases.
The S-2000 Sensor incorporates a thermistor that measures
the wash tank temperature. The detergent controller PC
board uses this temperature measurement to automatically
adjust the detergent feed to maintain a desired concentration
over a wide range of wash tank temperature.
Due to limitations in sensor technology, the thermistor in the
S-2000 sensor responds slowly to changes in wash tank
temperature. Under certain conditions this slow response
can cause the detergent controller to respond improperly to
changes in wash tank temperature and feed erratically.
If erratic detergent feed is occurring, the temperature
compensation feature of the S-2000 sensor can be re-
moved by disconnecting the sensor brown wire from
terminal #15 on the detergent controller PC board.
NOTE - This will cause the desired detergent concentra-
tion to drop signicantly, which will require resetting the
TITRATION DIP switch according to Section 6.2.
NOTE - When using a two-pole cell, temperature com-
pensation is not functional, so detergent concentration
will vary with wash tank temperature. For this reason,
it is important to adjust titration using a two-pole cell
ONLY when the wash tank is at the correct operation
temperature.
7.5 Optional Jumper Settings
There are two additional jumper settings on the detergent
controller PC board that are not normally used in standard
installations. The function of these additional jumpers is
JP1 - FEED OFF - Installing this jumper will stop deter-
gent feed when the empty product alarm is active. To
start the unit feeding again the product container must
be relled and power to the unit must be turned OFF
and back ON again.
JP2 - HI (left two pins of JP2) - Installing this jumper will
multiply the TITRATION DIP switch position settings by
a factor of 10 times. This allows the use of very high
detergent concentrations that exceed the maximum
setting of 63 drops. For example, turning ON position 3
and 4 with this jumper installed will result in a desired
titration of about 120 drops.
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