Keito K7
Technical and maintenance
Manual
INT.022EN.02
Revision “I”
24/09/2010
Page 22 of 43
3.3 - Escapement test.
This adjustment is very important to get correct blood pressure measurements. If the air exhausting decay rate is too quick,
the unit will lose information and the measurement will not be correct. If it is too low, the measurement will be
uncomfortable for the user (and his normal blood pressure will be altered), and the over pressure created by the blood
impulsions will not allow a correct calculation.
The escapement valve of the unit is automatically regulated and does require any type of adjustment. This test lets you
check the corrrect operation of the escapement valve..
The decay rate of the escapement must be of
3,5 to 4,5 mmHg / second
during the measurement.
When this test is activated, the process is the following:
1.
Inflates the cuff up to 245mmHg
2.
Activates the automatic escapement control and tries to reach a decay rate between the required limits (3,5 to
4,5mmHg/second). The maximum display shows the pressure in the cuff at every moment and the minimum
display shows the decay rate.
3.
When the pressure is 50mmHg, a ticket is printed with the elapsed time since the pressure was 250mmHg until
reaching 50mmHg , and with the maximum and minimum decay rate registered.
4.
During a few seconds, the system open and closes the escapement valve several times.
5.
After a while, the system start the whole process again.
6.
To end the escapement test, press the red key.
An escapement valve operating correctly must comply with the following requirements:
Requirements of an escapement valve operating correctly
·
Repetitive:
The elapsed time must be practically the same in all the tests. The decay rates must
be almost the same.
·
Be in the limits:
Most of the maximum and minimum decay rates registered on the ticket have to be
between 3,5mmHg/s (minimum) and 4,5mmHg/s (maximum).
Procedure to start the escapement test:
Key
Function to execute or select
Terminal Display
'Z' or 'ESC' Goes to option 0 of the main menu.
MAIN MENU:
0-SYSTEM ADJUSTMENTS
SPACE=NEXT
ENTER=SELECT
3
Select the blood pressure adjustments.
SUB-MENU PRESSURE :
3.3-ESCAPE ADJUST
SPACE=NEXT
ENTER=SELECT
3
The test starts.
PRESSURE mmHg:
0 0,0 0,0
ESC
When pressing ESC the process ends. The program goes back to
option 3 of the blood pressure adjustment sub-menu.
SUB-MENU PRESSURE :
3.3-ESCAPE ADJUST
SPACE=NEXT
ENTER=SELECT
