91518 Multigas Analyzer Service Manual
4-17
Maintenance
Gas calibration uses the tee connector and gas flow meter configuration that is illustrated in
on page 4-18. The pressure regulator is set to provide a stable flow of calibration gases that is
greater than required by the 91518.
The excess calibration gas flow is directed through the side port of the tee. It is critical that the excess gas flow
be maintained through the flow meter at 20-50 ml/min to ensure that the gas flowing into the 91518 is not being
diluted by room air and preventing accurate calibration.
Equipment and Supplies Needed for Calibration
• Calibration Adapter Kit: P/N 025-0047-00
•
Calibration Gas Mixture (5% Desflurane, 5.5% CO
2
, 43% N
2
O, 46.5% O
2
) (P/N 025-0047-00)
•
37" (94 cm) Polyurethane Tubing (used to cut 1" (2.54 cm) and 36" (91.4 cm)* tubing)
(P/N 166-0011-00)
•
Tee Connector (P/N 214-0486-00)
•
Male Luer Fitting* (P/N 214-0261-00) (used if the flow meter is equipped with 1/8 inch barb fittings. If
the flow meter has 1/16 inch barb fittings installed, substitute 36 inches 1/16" I.D. polyurethane tubing
and 1/16 inch male luer fitting
.
)
• 7-foot (213 cm) Sample Line (P/N 162-0047-01)
• Gas Pressure Regulator (P/N 369009-002)
• SDLC Cable, Tee (P/N 012-0175-xx)
• SDLC Terminator (P/N 012-0507-xx)
• Flow Meter, Brooks Model 1355 or equivalent (provide locally)
