To Prepare The Prism For Use; Remove Perkins Mk2 Tonometer From Case; Doubling Prism; To Insert Prism Into Prism Holder - Haag-Streit Perkins Mk2 Manual De Instrucciones

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5.

To Prepare the Prism for Use

5.

Remove Perkins Mk2 Tonometer from case

1
Remove the Perkins tonometer from the carrying case by holding the main body. Under no
circumstances should it be lifted by the prism holder (4 Fig 1).

Doubling Prism

5.
2
The doubling prism should be prepared for use by cleaning following the cleaning instructions
supplied with the prisms.

To Insert Prism into Prism Holder

5.
3
To insert the prism into the prism holder (4 Fig 1) gently press prism cone downward into the
prism holder (A Fig 4) and push into position along horizontal axis (B Fig 4).
N.B. Failure to follow these instructions could result in severe damage being
caused to the instrument.
5.

Tonosafe Disposable Prism

4
Alternatively, Tonosafe disposable prisms may be used. These are supplied as sterile single
use items to help eliminate the risk of cross infection.
Tonosafe and the prism holder have the same mass as the original doubling prism, so no
conversion of results is required. The disposable prism can be inserted in the same manner
as above.

Batteries

5.
5
The battery handle will accept four standard size AA batteries. To fit them in the instrument
proceed as follows:-
Press the two battery handle securing buttons (10 Fig 2) simultaneously and withdraw the
battery case (11 Fig 2), which forms the handle portion of the tonometer. Place the batteries
into the battery handle (11 Fig 2) ensuring they are positioned as indicated by the symbols on
the base (Fig 5a, p16).
15
Fig 4