Checking The Tonometer At 900 - Haag-Streit AT 910 Instructions For Use Manual

ENGLISH DEUTSCH FRANÇAIS

7.3 Checking the Tonometer AT 900

NOTE!
This check must be carried out once a month. If the check yields errone‑
ous results, please check the following points:
1. Is the measuring prism properly positioned?
2. Is the control weight correctly set?
3. Repeat the check.
Defective equipment must be sent immediately to your HAAG‑STREIT represen‑
tative.
NOTE!
HAAG‑STREIT offers a repair and service package. For further informa‑
tion, please contact your HAAG‑STREIT representative directly.
Check the drum position 0
•
Check position ‑0.05
The zero line on the measuring drum is moved downwards, opposite the index, by
a single marking width. The feeler arm must move by itself all the way to the stop‑
piece, in the direction of the examiner.
•
Check position +0.05
The zero line on the measuring drum is moved upwards, opposite the index. The
feeler arm must move all the way to the stop‑piece, on the patient's side.
Check the drum position 2
•
To conduct it, a control weight is used. The weight rod is engraved with five
rings. The middle ring corresponds to a scale value of 0, the rings immediately
to its left and right correspond to a value of 2, and both outside scale rings have
a value of 6.
•
One of the drum setting marks is set exactly to the index line on the holder. The
weight is fitted on the feeler axis (33) so that the longer part points to the exam‑
iner.
14
01-IFU_AT900-7006000-04240_eng.indd 14
ITALIANO ESPAÑOL PORTUGUÊS
AT 900 model R
© HAAG‑STREIT AG, 3098 Koeniz, Switzerland − HS‑Doc. no. 1500.7006000.04240 – 24. Edition / 2018 – 04
NEDERLANDS SVENSKA
AT 900 model T AT 900 model BQ
‑0.05
6 2 0 2
AT 870
+0.05
33
6
03.05.2018 10:11:18