Nikon D90 - Digital Camera SLR Руководство пользователя - Страница 20

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2. Calibrating at sea level (1.015 hPa)

When this unit is used at sea level, the reference pressure has to be set to

1.015 hPa (factory settings). To calibrate the unit at sea level:

- first remove the battery from the camera support;

- remove the hot shoe cable from the Hugycheck system (J1 or J2);

- install the HugyCheck calibration jumper on J1 (direct);

- install the battery in the camera support;

The yellow LED will burn, indicating that the reference pressure has been set

to 1.015 hPa (factory settings).

- remove the battery from the camera support;

- remove the HugyCheck calibration jumper on J1 (direct);

- install the hot shoe cable on the Hugycheck system (J1 or J2);

- install the battery in the camera support.

The system in now ready to be used at sea level.

When the unit is used at altitude (< 850 hPa) while calibrated at sea

level, the red LED may already be blinking rapidly even with no under

pressure inside the housing as the system will register a pressure below

850 hPa.

When the unit is used at sea level while calibrated at altitude, the refe-

rence pressure (< 1.015 hPa) may be so low that the pump will not reach

the required underpressure in the housing to acivate the green LED. In

this case the red LED will keep on blinking rapidly.

Hugyfot Housing for

To calibrate at sea level, the HugyCheck calibration

jumper is to be installed on J1 (direct).

Nikon D90

Warning

User manual