CS SR50A, Instruction Manual

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SR50A-Series Sonic Ranging Sensors
15
9. Maintenance and Troubleshooting
The SR50A’s electrostatic transducer requires equal pressure on both sides.
Vent holes in the transducer housing are used to equalize pressure. Desiccant
(pn 4091) placed inside the transducer housing helps prevent condensing
humidity. Regularly inspect the desiccant and, if required, replace it. Desiccant
capable of absorbing moisture is blue. Once the desiccant becomes saturated,
the color changes from blue to pink. In humid environments, replace the
desiccant more frequently. Inspection or replacement of the desiccant requires
the SR50A to be disassembled (Section 9.1 , Disassembly/Assembly Procedures
(p. 15)
).
Replace the transducer assembly every three years if it is not in a humid
environment. Replace the transducer housing assembly every year in humid
environments.
•
Standard SR50A housing and maintenance kit: pn 19486.
•
SR50A open-faced housing and maintenance kit (used with the
SR50A-316SS model): pn 32570.
•
SR50AH housing and maintenance kit: pn 32571.
9.1 Disassembly/Assembly Procedures
FIGURES 9-1 through 9-6 show the procedure for disassembling the SR50A.
Disassembly is required to inspect or replace the desiccant, and to change the
transducer and the option jumpers.
Before proceeding with any maintenance, always retrieve
the data first. Campbell Scientific also recommends saving
the datalogger program.
Always disconnect the SR50A from the datalogger or the
connector before disassembling.
FIGURE 9-1. Disconnect Cable from Sensor
CAUTION
CAUTION