12
DEUTSCH
ENGLISH
FRANÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
PORTUGUÊS
SVENSKA
DEUTSCH
ENGLISH
FRANÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
PORTUGUÊS
SVENSKA
© HAAG‑STREIT AG, 3098 Koeniz, Switzerland − HS‑Doc. no. 1500.7006000.04220 – 22. Edition / 2016 – 06
Correct setting! (9)
9
Two semicircles appear exactly in the middle of the eyepiece.
5.8.3 Position too high / low
Only part of a semicircle in the upper half (10)
10
Measuring prism not centred on the eye, eye far too high.
Using the control lever, move the slit lamp upwards.
Complete circle in the upper half (11)
11
Measuring prism not centred on the eye, eye still too high.
Using the control lever, move the slit lamp upwards.
Nearly entire circle above, incomplete circle below (12)
12
Measuring prism not centred on the eye, eye still too high.
Using the control lever, move the slit lamp upwards.
Two incomplete circles, the larger one on top (13)
13
Measuring prism not centred on the eye, eye still too high.
Using the control lever, move the slit lamp upwards.
Correct setting! (14)
14
Two semicircles appear exactly in the middle of the eyepiece.
5.8.4 Incorrect pressure
The outside borders of the fluorescein bands are in contact
with each other (15)
15
Not enough pressure.
Increase the pressure slightly by rotating the knob on the
tonometer.
Fluorescein bands are superimposed to form a band (16)
16
Pressure slightly too low.
Increase the pressure slightly more by rotating the knob
on the tonometer.
Bands are no longer in contact (17)
17
Pressure is too high.
Lower the pressure by rotating the tonometer knob in the
opposite direction.
Correct setting! (18)
18
The inside borders of the fluorescein bands are contacting each
other.
6. Technical data
6.1 Applanation tonometer AT 900
Measuring force gen-
erated
through leverage weight.
Installation
AT 900 model R
AT 900 model T
AT 900 model BQ
Can be fitted on the peg on the microscope.
Can be fitted on the guide plate on the swiv
‑
elling peg for the microscope and illumina‑
tion arm.
Assembly on the microscope arm.
Measurement range
0 ― 80 mm Hg
Measurement deviation The measurement deviation in the measuring prism is in the measur‑
ing range from 0 – 58.84 mN and amounts to a maximum of ±1.5%
and to a minimum of ±0.49 mN of the nominal value.
01-IFU_AT900-7006000-04220_eng.indd 12
09.06.2016 13:51:02
