DATASONICS PSA-916, User Manual, Page: 17 / 26

PSA-916 Sonar Altimeter 3-6
Setup and Deployment Deployment
NOTE: Always test the operation of each PSA-916 as a stand-alone instrument before
integrating it into another system.
Datasonics recommends that an in-air test be performed followed by a short
range in-water test prior to the actual deployment.
A major source of problems with acoustic equipment is that the transducer is
not clean and acoustic signals are masked. We strongly recommend that
prior to each deployment that the user clean the exterior of the pressure
casing and transducer with fresh water and a mild detergent. Do not use
glass cleaner.
To perform the in-air test:
!
Turn the altimeter ON by applying power.
!
Verify that the RS-232 output is 99.99E and that the analog output is
4.98V. Note that if under-range detection is enabled, verify the RS-232
output is’0.8<’ and the analog output is 39.8 mv.
!
If under-range detection is not enabled, tap on transducer face with fin-
ger, and verify that the RS-232 and analog output changes.
If the in-air test was successfully completed, proceed to an in-water test.
Make sure the transducer is well below the keel of the boat and away from
prop wash and noise. A test tank or barrel filled with water can be used
provided the water depth is at least three feet.
3.5 Deployment
Once you are confident that the unit is operating properly on its own, you can
then integrate it with other instrumentation used in your application.
If acoustic energy generated by other instruments is strong enough, it can
adversely affect PSA-916 operation, even if the acoustic output of the other
instrumentation is at different frequencies. You may have to relocate or
reposition the PSA-916 to achieve reliable results.