Dräger Narkomed 2B, Руководство по обслуживанию, Страница: 36 / 308

REPLACEMENT PROCEDURES (continued) NM2B
4.1.12 Position the yoke on the spacer, and install the two mounting screws
and lockwashers. Tighten the screws securely. Connect the gas line
fitting to the yoke.
4.1.13 If a new cylinder is being installed, remove the old sealing washer
from the gas inlet of the yoke and install a new washer.
4.1.14 Install the correct cylinder in the yoke, making sure that the index
pins are properly engaged before tightening the handle bolt. The
cylinder should hang vertically after the handle is tight.
4.1.15 Perform the following leak test on the yoke assembly:
4.1.15.1 Open the cylinder valve and check for a pressure
indication on the corresponding gauge at the gas
instrumentation panel.
NOTE: The cylinder used for this test must
contain the following minimum pressure:
O
2
: 1000 PSI
N
2
O : 700 PSI
HE : 1000 PSI
CO
2
: 800 PSI
AIR : 1000 PSI
N
2
: 1000 PSI
O
2
-He : 1000 PSI
4.1.15.2 Close the cylinder valve and remove the cylinder from the
yoke.
4.1.15.3 For any gas, the pressure should not drop more than 50
PSI in two minutes.
4.1.16 Re-install the cylinder in the yoke.
4.1.17 Replace the table top and its retaining screws.
4.1.18 Replace the pipeline hoses.
4.1.19 Perform the PMS Procedure given in Section 6.
Rev. A
4-4
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