SPECIAL PROCEDURES
DSA3017/3018/3217/3218
Sensor Replacement
The sensors used in the Digital Sensor Array modules are field replaceable. Replacement of the sensors
must be accomplished by following the procedures in this manual very carefully. If the procedures are not
followed, the sensors and/or the modules or both may be damaged. It is very important that the user be very
familiar with this procedure before attempting to replace a sensor. For more information or assistance,
contact: Scanivalve Corp, Product Support Department at (800) 935-5151.
Please refer to figures 23, 24 and 25.
1.
Place the module on its side with the connector side down. Remove the six screws on the top and the
six screws on the bottom of the case.
2.
Lift the cover side off and remove the insulation from the sides and bottom.
3.
Carefully and gently remove the DSA right side cover (with the electronics). Disconnect the cables
making certain to note where and how they are connected.
4.
Remove the brass reference manifolds from each end of the DSA Module. DO NOT disconnect the
plumbing.
5.
Remove the two mounting screws from the quick zero valve base to separate the valve from the DSA
housing.
DO NOT
disconnect the nylon tubing. See figure 23.
6.
Remove the bottom screws from the reference housing where the failed sensors are located. Refer
to figure 24.
7.
Install #6 X 1.5" or similar screws in two of the blind holes in the bottom of the reference housing and
gently pull the housing from the DSA module.
8.
Remove the failed sensor(s) with the sensor removal tool. Insert the new sensor(s). Refer to figure
24.
9.
When the failed sensor(s) have been replaced, reassemble the module by following this procedure in
the reverse order.
10.
The coefficients for the replacement sensors must be merged into the Module memory. DSALInk3
must be used to complete this task.
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