
350 Cable Survey System
DPN 402197 © TSS (International) Ltd Page 24 of 26
Figure 9–13: Altimeter failure – CHART 2
From CHART 1
Power-off the System
Disconnect cable from
altimeter
Continuity check
altimeter cable
Is
wiring
OK?
Connect a 470 ohm
1 watt resistor between
pins 1 and 3 of the SEP
altimeter port.
18V
±2V
OK?
Refer altimeter manual
Disassemble the SEP
Check wiring to end-cap
Contact TSS for advice
Is
wiring
OK?
No
Yes
Remove the four screws
in the altimeter end-cap
Yes
No
Yes
No
Renew altimeter cable
Set DC voltmeter to
pins 1 (+) and 3 (-) of
SEP altimeter port
Repair/renew wiring
Renew the SEP
Processor Board
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