Spacelabs 91518, Руководство по обслуживанию

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Maintenance
91518 Multigas Analyzer Service Manual 4-18
Figure 4-16: Gas calibration setup
To perform a gas calibration:
1 Perform the setup procedure and performance verification procedure.
2 Verify that the stabilization message has disappeared from the prompt line (the analyzer may take up to 30
minutes to fully warm up and stabilize).
3 Press the GAS key, then press the CAL key to open the Calibration Menu. Refer to
Figure 4-17 on page 4-20.
4 Press ZERO / YES to perform a zero calibration.
5 Connect the gas analyzer to the gas cylinder using the setup shown in Figure 4-16 .
6 Touch the hidden SERVICE CAL key (one inch to the right of the ZERO key) five times.
7 Establish a gas flow which includes a gas overflow of 20 to 50 ml/min from the side port of the tee as read
on the flow meter (the pump rate should already be at the default value of 175 ml/min).
Note:
The 91518 must be powered on for 30 minutes to allow the internal temperatures to stabilize.
gas pressure
1" (2.54 cm) polyurethane
flow meter
Brooks Model 1355 or
equivalent
91518 Multigas Analyzer
CAL gas cylinder
7' (2.13 m) blue tinted
to scavenging system
36" (91.4 cm) polyurethane
male luer fitting
sample line to
91518 water trap
input
regulator
or exhaust hood
tubing
from
scavenging port
tubing