Title: Final Test 8500 Document No: 129TP000 Sheet 16 of 17
BLEASE QUALITY DOCUMENT
BQD 083.V2
25/5/94 Checked:-________
It is not unusual when measuring volume that the Timeter throws up an error message like
'HELP R' or 'HELP F'. All this means is that the Timeter had difficulty in identifying the start
or end of a breath, possibly due to some pneumatic valve noise or reverse flow through the
Timeter.
If it occurs a lot, it might be because there is a leak in the patient circuit, or the Timeter
needs zeroing, or the patient circuit is moving/vibrating with the breath. These are a few
things to check before assuming there is anything wrong with the ventilator.
Timeter Peak Pressure Measurements
If the ventilator has anything more than a few cmH
2
O of CPAP pressure, the Peak Pressure
function on the Timeter will NOT operate. It will sit there forever showing the last peak
pressure measured.
6.3 Timeter Zeroing and Power Up
When the Timeter is first switched ON, its sensors and electronics will need to be zeroed
before the Function Codes will operate. This is simply done by pressing the Zero button
provided after a Function has been selected and there are NO PNEUMATIC CONNECTIONS
TO THE TIMETER.
The zeroing must be checked and done to all Functions periodically. The procedure is as
follows:
a) Remove any tubing from the Timeter
b) Check the display reading. The display should read zero
c) If the display does not read zero, press the Zero button on the keypad. The display will
now read zero
d) Resume testing
ALWAYS ALLOW AT LEAST 10 MINUTES WARM-UP AFTER INITIAL SWITCH ON
BEFORE USING THE TIMETER.
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