Smith-Root GPP 2.5 - Procedure 4: Check Rotor Windings

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GPP ELECTROFISHER
USER’S MANUAL
2016
PROCEDURE 4: CHECK ROTOR WINDINGS
PROBLEM: NO OUTPUT FROM GPP ELECTROFISHER (CONT.)
Disconnect yellow wires from the brush end cap and the Rectifier.
(See Fig. 4.1).
Measure resistance with ohmmeter between rotor slip rings, through
the Brushes. Brushes are accessible via the brush end-caps. (See Fig.
4.2).
Resistance should read as follows:
• ≈24 ohms – 2.5 GPP
• ≈32 ohms – 5.0 GPP
• ≈36 ohms – 7.5 and 9.0 GPP
If resistance varies significantly from above, take measurements
directly from the slip rings.
Check Rotor Slip Rings to ground (OPEN connection). (See Fig. 4.3).
Replace rotor if measurements are out of specifications.
Figure 4.1
Fig. 4.1
Figure 4.2
Fig. 4.2
Figure 4.3
Fig. 4.3
Go to procedure 5.