Canon TX-20 Full Auto Tonometer 手册

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5TypesofMeasurements

In the intraocular pressure settings menu, you can configure the settings of the intraocular pressure 
measurement range switching, units of intraocular pressure measurements, display of received 
light level, warning display threshold for intraocular pressure, display of error screen, and display of 
warning screen/waveform.

MENU screen > 

 Measure tab > [Tonometer] 

Setting items 

Description 

Factory 

settings 

Range

Switch the range of intraocular pressure that can be measured. 

[30]:   Measures a range from 0 to 30 mmHg. If the pressure is over 30 

mmHg, it switches to 60 mmHg. 

[60]:   Measures a range from 25 to 60 mmHg. If the pressure is under 25 

mmHg, it switches to 30 mmHg. 

30

Unit

Set the units for intraocular pressure measurements. 

[mmHg]: Units of measurement are shown in mmHg. 
[hPa]: Units of measurement are shown in hPa. 

mmHg

Level Meter

Set to enable showing the received light level. 

[ON]: Show the received light level. 
[OFF]: Do not show the received light level. 

ON

Upper IOP 
Warning

Set the upper pressure limit at which measurement is stopped (only 
enabled in full auto mode). 

[17 to 25 mmHg]: Upper limit of intraocular pressure at which to stop 
measurement 
[23 to 33 hPa]: Upper limit of intraocular pressure at which to stop 
measurement 
[OFF]: Do not show message or stop measurement. 

18

Lower IOP 
Warning

Set the lower pressure limit at which measurement is stopped (only 
enabled in full auto mode). 

[1 to 9 mmHg]: Lower limit of intraocular pressure at which to stop 
measurement 
[1 to 12 hPa]: Lower limit of intraocular pressure at which to stop 
measurement 
[OFF]: Do not show message or stop measurement. 

OFF

Error Display Set whether to show an anterior segment image when a measurement 

error occurs. 

[ON]: Shows image. 
[OFF]: Does not show image. 

ON

Warning 
Display

Set whether to show three anterior segment images and waveform when 
measurements are inconsistent. 

[ON]: Shows images and waveform. 
[OFF]: Does not show image and waveform. 

ON

L-IE-5191C_TX-20.indb   62

2013/07/18   13:10:36