(e) Rotate the inspiratory time-limit control knob fully clockwise.
(f)
Troubleshoot the Mark 2 inspiratory time system as detailed in
Table 2-13.
┌────────────────┬──────────────────┬───────────────────────────┐
│ Problem
│ Potential Cause │ Corrective Action
│
╞════════════════╪══════════════════╪═══════════════════════════╡
│ Cannot achieve │ Premature
│ 1. Ensure the inspiratory │
│ a 2.5-second
│ lockout.
│ time-limit control knob is│
│ inspiratory
│
OR
│ fully clockwise.
│
│ lockout.
├──────────────────┼───────────────────────────┤
│
│ Gas escaping
│ 2. Use a 1/2 inch open-end│
│
│ around small
│
│
│ O-ring (P/N 114) │ Check condition of small │
│
│ in inspiratory
│ O-ring on end of valve.
│
│
│ time-limit valve.│ Replace if cut, flat, or │
│
│
OR
│ worn.
│
│
├──────────────────┼───────────────────────────┤
│
│ Faulty
│ 3. Replace with a new
│
│
│ inspiratory time │ valve.
│
│
│ valve (P/N 1360A)│
│
│
│
OR
│
│
│
├──────────────────┼───────────────────────────┤
│
│ Malfunction in
│ 4. Refer to the Mark 2
│
│
│ Mark 2.
│ Timing System
│
│
│
│ troubleshooting
│
│
│
│ procedures.
│
│
│
│
│
└────────────────┴──────────────────┴───────────────────────────┘
Table 2-13. Inspiratory time (Mark 2) troubleshooting.
(12) Expiratory time (Mark 2).
(a) Rotate the expiratory-time stem clockwise for an 8 to 10 second
expiratory time. Begin timing from the end of an inspiratory cycle to the beginning of the
next cycle.
(b) Apply Lubewick to the O-ring on the outside of the retention cap and
install the control knob with the flange-stop screw clockwise (below) to the 9-o'clock stop
on face plate.
(c) A full counterclockwise rotation should produce an expiratory time of
less than 0.5 (1/2) second.
(d) Rotate the expiratory-time stem fully clockwise against the stop and
then rotate the mode selector to SPONTANEOUS BREATHING ON.
MD0355
2-26