Dial Control; Specifications - Norvap Apollo Operation & Maintenance Manual

2.2 The Dial Control
To set the desired concentration of anaesthetic agent, a single Dial Control
with a concentration scale calibrated in % of anaesthetic agent vapour per
volume (v/v) is used. This Dial Control incorporates a release button (see Fig
1 and 2) to help prevent accidental rotation of the dial from the "OFF" to the
"ON" position. A counter-clockwise rotation of the dial and simultaneous
depression of the release button is required to set the vaporiser to the on
position.
Figure 1 Apollo Tec 3 Style Vaporisers
3

Specifications

Apollo Tec 3 Style vaporisers are calibrated at 71.6°F (22°C) +/- 1°C using an
oxygen carrier gas at a flow of 3 litres/minute. The variation in output with
temperature, flowrate and duration of use is small, and the variation of output
when used with Intermittent Positive Pressure Ventilation is negligible.
The output of the vaporiser is affected by barometric pressure, and it may be
necessary to use a correction factor when analysing the output, especially at
high altitudes >1500 metres. The barometric pressure is not normally of
clinical significance
Doc. No. 157 Issue 1.0 Draft Apollo Operations Manual
20 March 2019 Page 7 of 27