Zeiss AT 030, Product Documentation Set

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Instruction for use 7 Maintenance
AT 030 7.4 Checking the device
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Detailed check before mounting on the slit lamp
1
Figure 13: Checking the AT 030
1 Test weight
u
Set the scale reading to 0.
u
Take the 2 g and 5 g test weights out of the storage box.
u
Put the AT 030 onto the open box with the scale facing
downwards.
u
Insert the measuring prism inversely up to the normal
measuring position into the measuring prism holder.
u
Place a test weight concentrically onto the measuring prism.
u
Turn the rotary knob slowly from the 0°-position until the
measuring arm with the weight oscillates weightlessly around
its center position. Remove the test weight.
u
Record the corresponding scale value.
u
Repeat this procedure four times (two times each from the side
of greater and smaller forces) and calculate the arithmetic
average of the readings.
NOTE! The values obtained with both weights should be 2.0
± 0.06 sc dlv. (2 g weight) and 5.0 ± 0.1 sc dlv. (5 g weight).
If these values cannot be reproduced, discontinue using the
tonometer and consult ZEISS Service.
Please also observe the
information in section Metrological check [
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33].