Nikon D90 User Manual page 17

J2 connecter - iTTL or eTTL mode through optional TTL converter
J2 connecter - iTTL or eTTL mode through optional TTL converter +
Manual mode
mode, only the Q line of the TTL strobe has to be switched on.
Vacuum system
When the battery is installed, the HugyCheck system is in 'stand-by' mode
and the red LED on the camera hot shoe will blink every 5 seconds. To start
the vacuum procedure, please make sure that the system is in 'stand-by'
Start the vacuum procedure at least 30 min prior to the dive.
mode.
- Check the main O-ring and port O-ring and close the housing.
Make sure the port is installed properly.
- Install the one-way valve into the 3rd bulkhead and remove the
sealing cap.
- Insert the plug on the electrical vacuum pump into the one-way
valve and press the button on the pump.
One way valve installed in 3rd bulkhead
(only on new models).
Hugyfot Housing for
When the camera hot shoe is connected to J2 and
when conventional TTL strobes are used in combina-
tion with the optional TTL converter, only the Q lines
of both strobes have to be switched on.
When the camera hot shoe is connected to J2 and
when 1 conventional TTL strobe is used in combina-
tion with the optional TTL converter in combination
with 1 conventional strobe that is used in manual
Nikon D90
One way valve installed in manifold
(old models which only have 2 bulkheads).
17 User manual