Operating Instructions OXY5500 Gas Analyzer
46 Endress+Hauser
5.13.6 Setting the first calibration point Cal0
1. Flow Cal0 gas to sensor for the first calibration point. Refer to Table 12 for Cal 0 gas specifications.
2. Click Start to the left of the Cal0 value.
The Status field will display the message ‘Wait - Stabilizing!’ Wait for the phase values to stabilize within ± 0.01°.
Disregard the “Ready to Set Value” message.
3. Run zero gas until the phase is stable; within 0.01 (approximately 45 to 60 minutes).
4. Move the Set button to the left of the Cal0 value and click OK.
5.13.7 Setting the second calibration point Cal2nd
1. Flow Cal2nd gas to sensor for the second calibration point.
2. In the O2-2nd field, type in the oxygen value (concentration unit) of the second calibration medium.
3. Click Start next to the Cal2nd box.
The Status field will display the message, “Wait - Stabilizing!”. Wait for the phase values to stabilize within
±.01°.
Disregard the “Ready to Set Value” message.
4. Click Start to the left of the Cal2nd value.
5. Click OK.
5.13.8 Saving the calibration values
1. Click Save at the upper right of the screen.
2. Click OK to store the calibration data for the selected sensor.
The display will switch to the measurement screen automatically.
5.13.9 Relative accuracy test audit (RATA)
RATA is accessible from the RATA button on the SENSOR / SENSOR OPTIONS menu screen.
5.13.10 Setting RATA
1. Select RATA in the SENSOR OPTIONS window. Refer to Figure 57.
Figure 57. Sensor options screen
2. Click OK to perform a Relative Accuracy Test Audit (RATA). This will open a message window with the question,
“Measurement Active. Abort for calibration?” Refer to Figure 58.
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