Introduction; Overview; Appliance Assembly / Installation; At 900 Model R - Haag-Streit AT 870 Instructions For Use Manual

SVENSKA
2.

Introduction

The applanation tonometer functions according to the Goldmann method: measure‑
ment of the pressure required to maintain a uniform applanation of the surface of
the cornea. The exact measurement of the applanation surface is performed at 10x
magnification on the slit lamp.
The pressure is measured on the slit lamp with the patient seated and is part of a
routine examination within the scope of conventional slit lamp microscopy.

2.1 Overview

1. Measuring prisms
2. Sensor arm
3. Rotating knob with measuring drum
4. Insert for control weight
5. Type plate (underside)
3.

Appliance assembly / installation

WARNING!
Installation, repairs and modifications may only be performed by trained
specialists.

3.1 AT 900 Model R

A pivot is required for use of the Applanation Tonometer AT 900 model R. It is as‑
sembled as follows:
1. Unscrew the mounting screw found at the top, on the microscope's middle cyl‑
inder housing.
2. Leave the spring in the aperture.
3. Position and screw on tightly the pivot for the tonometer.
4. Place the tonometer bearer arm on the pivot's pin and swivel the tonometer to
the right until it snaps into position. The tonometer will remain in this position
even when not in use.
5. When using the BI 900, BM 900 and BM 900 V, the stop peg must be assembled
(a), and when using the BC 900 or BD 900, it must be removed (b).
© HAAG‑STREIT AG, 3098 Koeniz, Switzerland – HS‑Doc. no. 1500.7006000.04220 – 22. Edition / 2016 – 06
NEDERLANDS PORTUGUÊS

3.2 AT 900 Model T

The Applanation Tonometer is tucked into one of the holes on the horizontal guide
plate over the slit lamp axis using the peg from the tonometer base.

3.3 AT 900 Model BQ

1. Assembly requires the small screwdriver and the 5 mm hexagonal Allen key.
2. Slide the slit lamp to the stop‑piece against the examiner and lock the instru‑
1
3. Swivel the illumination apparatus entirely to the left side.
4. Disassemble the breath shield from the microscope arm.
2
5. Remove the cover screw located on the plain, right‑hand surface of the micro‑
3
6. Bring together the swivelling arm of the tonometer and the radial movement
7. Shore up the tonometer on the guide plate and tighten the mounting screw into
4
8. Loosen up the lock on the microscope arm and the instrument base, then reas‑
5
(a)

3.4 Tonometer AT 870

ESPAÑOL ITALIANO FRANÇAIS
ment base and the microscope arm in the middle position.
scope arm.
bearing to an elongated position.
the boring on the microscope arm. If there is no guide plate present: hold the to‑
nometer in a horizontal position.
semble the breath shield.
NOTE!
The cover screw on the left side of the arm is loosened by turning it in
a clockwise direction using the screwdriver (applies only for late tonom‑
eter deliveries).
(b)
NOTE!
The instructions for appliances from other manufacturers are to be ob‑
served.
DEUTSCH ENGLISH
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