Chemtrac Systems, Inc.
Page 47
SECTION 6.0 MAINTENANCE PROCEDURES
The Dura-Trac sensor is supplied with two (2) probes and (2) pistons so freshly cleaned parts
can always be on hand.
6.1 REPLACEMENT PROCEDURES
The following steps describe probe replacement:
1. Disconnect the lead wire from the enclosure and remove the lower retaining slip nut
from the probe.
2. Remove probe by pulling on the tab. You may need to twist slightly.
3. Remove the piston using a ¼” flatblade screwdriver.
4. Clean any debris from cell housing.
5. Screw clean piston into place. Do not over tighten. Only slight torque is necessary.
6. Insert clean probe into cell housing.
7. Slip retaining nut over probe lead wire and tighten onto probe. Finger tight is
adequate - be careful to avoid cross threading the nut.
8. Connect probe lead wire to side of enclosure.
9. It may take several minutes for monitor readings to stabilize with a new probe.
Sensitivity to process changes may also be greater. If the Offset is used, the user
must set the Offset to OUT position. After SCV reading is stabilized, set the zero
Offset to the IN position to re-zero the SCV reading.
CAUTIONS
R If monitor is being used for automatic dosage control, put the controller into
MANUAL mode before starting replacement procedure.
6.2 CLEANING PROCEDURES
Depending on the type of contamination, see table below for different cleaning
procedures recommended.
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