Armasight PVS-7 Manual de servicio descargar pdf (Pagina 22)

CAUTION:

If the demisting shields need to be cleaned, make sure the shields are dry and only use dry lens

paper. If the demist shields are wiped while wet or with wet lens paper, you will damage the

coating.

NOTE:

If inclement operating conditions are known to be a possibility prior to your mission (e.g. sig-

nicant temperature change and high humidity), install the demist shields before operation in

order to minimize diopter lens fog.

1. Carefully remove the eyecups.

2. Carefully press a demist shield onto each eyepiece. Be careful not to smudge the eyepieces or demist

shields.

3. Replace the eyecups (see paragraph 3.3.

E. Installation of the sacricial Window. Perform the following procedure to install the sacricial

window. Refer to Figure 3-3.

CAUTION:

If adverse operating conditions (dust or sand), are known to exist, attach the sacricial window

to protect the objective lens from scratches or other damage.

1. If the compass assembly or lens cap is in place, remove it.

2. Carefully push the sacricial window over the objective lens until it stops. Turn the sacricial window

clockwise until it snaps into place.

F. Installation of the Compass Assembly.

NOTES:

a. Prepare the PVS-7 for operation (paragraph 3.3.1).

b. Ensure the neck cord is secured to the compass and clothing before installing.

1. If the sacricial window or lens cap is in place, remove it.

2. Turn the PVS-7 on.

Ir Spot/flood lenS

compaSS

SacrIfIcIal

wIndow

demISt

ShIeldS

FIGURE 33. INSTALLATION OF DEMIST SHIELDS, SACRIFICIAL WINDOW

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Armasight PVS-7 Manual de servicio Pagina 22