Philips Efficia DFM100 - Flow Rate Check; Accuracy Check

2: Maintenance EtCO2 Maintenance
28
Flow Rate Check
Perform the EtCO
2
Flow Rate check to validate the values provided by your CO
2
sensors.
 To p e r f o rm t h e Et C O
2
Flow Rate Check:
1 Enter the Service Mode and select EtCO
2
to access the EtCO
2
maintenance menu.
2 Select Flow Rate Check.
3 Follow the screen instructions to perform the check.
Accuracy Check
 To perform an accuracy check:
1 Set up the equipment for accuracy check.
a For the LoFlo sensor:
• Modify the adapter using a T-shaped joint.
Keep the open end short (about 5cm).
• Connect the modified adapter to the sensor.
• Connect the tube to the 5% CO
2
gas cylinder.
Leave the other end of the tube open to air, do not block.
b For the Capnostat sensor:
• Modify the adapter by sealing an airtube inside an adapter using a silicone or another
airtight plug. The airtube end should not enter the sensor.
• Connect the modified adapter to another adapter and to the sensor.
• Connect the tube on the 5% CO
2
gas cylinder.
2 Enter the Service Mode and select EtCO
2
to access the EtCO
2
maintenance menu.
3 Select the Main Menu and select Accuracy Check.
4 Follow the on-screen instructions. Do not allow excessive gas flow.
5 If the EtCO
2
Accuracy Check Failed. Module not ready message appears, the let the sensor warm up
for about 1 minute and restart accuracy check.
Figure 29 CO
2
Accuracy Check Setup, LoFlo Sensor
CO
2
gas
cylinder
LoFlo
to the
DFM100
T-shaped
joint
open to the atmosphere