Operator’s Manual LTV
®
Series ventilator Page 5-7
p/n 10664, Rev. Y
Control Locking
The front panel controls may be locked so that settings cannot be accidentally changed. When the
controls are locked, the Control Lock LED will be on. If you try to select or change a control while the
Control Lock is on, the message LOCKED will be displayed in the display window and the Control
Lock LED will flash.
Two different levels of difficulty can be set for control unlocking: Easy and Hard. The Easy unlocking
method should be used when only trained personnel have access to the ventilator. The Hard method
should be used when children or others may have access to the ventilator and you want to prevent
accidental changes to the control settings. Easy unlocking is the default and this setting is changed
using the Extended Features menus
12
.
To turn the Control Lock on:
1) Push the Control Lock button.
The Control Lock LED is on whenever the front panel controls are locked.
If you push a button while the controls are locked:
1) The Control Lock LED will flash.
2) LOCKED will be displayed in the display window.
3) The button push is ignored.
To turn the Control Lock off with Easy unlocking:
1) Push the Control Lock button.
To turn the Control Lock off with Hard unlocking:
1) Push and hold the Control Lock button for 3 seconds.
These controls are not affected by the control lock and operate even when the control lock is on:
Manual Breath, Silence / Reset, Select.
Control Retention
Once a control value is set, that value will be retained in non-volatile memory
13
. The settings retained
in non-volatile memory will be used when the ventilator is next powered up.
12
See Chapter 10 - Extended Features, Control Unlock for more information.
13
Non-volatile memory is memory that is not erased when the ventilator is turned off or disconnected.
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