Edgetech 2205 - 10. Transducer Characteristics; 10.1 Side Scan Capacitance; 10.2 Sub-Bottom Capacitance

2205 System Technical and User’s Guide
Document : 0022175 Rev A Page 23
10. Transducer Characteristics
10.1 Side Scan Transducer Capacitance
Capacitance measurements were made using a LCR meter at 1kHz (table 10-1). Similar measurements
can be made with a capacitance measurement capable DVM. Note that these measurements should be
used as a guide and not an absolute as to a transducer’s status. Extreme deviation (>30%) from these
values, will often be the indicator of a bad transducer.
Transducer Series
120kHz Capacitance
Pin 6 to Pin 7
230kHz Capacitance
Pin 6 to Pin 7
410kHz Capacitance
Pin 4 to Pin 5
2300 - xxx
2.9 ± 0.5 nf
2.4 ± 0.5 nf
2.1 ± 0.5 nf
Transducer Series
540kHz Capacitance
Pin 4 to Pin 5
850kHz Capacitance
Pin 2 to Pin 3
2300 - xxx
1.9 ± 0.5 nf
1.3 ± 0.5 nf
Table 10-1. Transducer Capacitance Measurements
10.2 Sub-Bottom Receiver Capacitance
Capacitance measurements were made using a LCR meter at 1kHz (table 10-2). Similar measurements
can be made with a capacitor capable DVM. Note that this measurement should be used as a guide and
not an absolute as to a hydrophone’s status. Extreme deviation from this value will often be the indicator
of a bad hydrophone. As the sub-bottom transducer has an internal transformer and matching network, no
capacitance measurements can be acquired.
Hydrophone Series
Capacitance
Pin 2 to 3
106 PVDF Panel
0022320
11 ± 1.0nf
Table 10-2. Hydrophone Capacitance Measurements