(e) Use the procedures outlined in Table 2-14 below to troubleshoot the
Mark 2 expiratory time system.
┌────────────────┬──────────────────┬───────────────────────────┐
│ Problem
│ Potential Cause │ Corrective Action
│
╞════════════════╪══════════════════╪═══════════════════════════╡
│Cannot achieve │ Gas escaping
│ 1. Use 1/2 inch open-end │
│an 8 to 10 sec. │ around small
│
│expiratory time.│ O-ring (P/N 114) │ Check condition of small │
│
│ on expiratory
│ O-ring on end of valve.
│
│
│ valve.
│ Replace if cut, flat, or │
│
│
OR
│ worn.
│
│
├──────────────────┼───────────────────────────┤
│
│ Faulty expiratory│ 2. Replace with new valve │
│
│ time valve. OR │ (P/N 1360A).
│
│
├──────────────────┼───────────────────────────┤
│
│ Malfunction in
│ 3. Refer to para (7)(d)
│
│
│ the Mark 2.
│ troubleshooting the Mark │
│
│
│ 2 timing system.
│
└────────────────┴──────────────────┴───────────────────────────┘
Table 2-14. Expiratory time (Mark 2) troubleshooting.
(13) Low pressure alarm system.
(a) Decrease source pressure on the calibration regulator from 50psig
to a pressure at which the low pressure alarm sounds. The alarm should sound when
the pressure reaches 43psig and drops from the green pressure wedge on the gauge
atop the ventilator.
(b) To adjust the pressure at which the alarm is activated, locate the
adjustment knob on the low pressure alarm cartridge (refer to figure 2-2, point D).
(c) A clockwise rotation will increase the alarm pressure. A
counterclockwise turn will decrease the pressure. Adjust the knob so the alarm sounds
at 43psig.
(d) If the low pressure alarm adjusts for 43psig, proceed to the next
step (e) below. However, if the low pressure alarm system is not functioning, go on to
step (f) below, troubleshooting the low pressure, alarm system.
(e) Adjust calibration regulator back to 50psig. This completes
calibration of the Babybird ventilator. However, before reassembling the back and side
plate, we recommend one last check of all parameters by performing the following
calibration test in paragraph d.
(f) Use the procedures detailed in Table 2-15 to troubleshoot the low
pressure alarm system.
MD0355
2-27