Endress+Hauser OXY5500 - Page 48

Operating Instructions OXY5500 Gas Analyzer
48 Endress+Hauser
5.13.14 Setting the temperature for RATA calculation
• Select Auto to measure the temperature for RATA calculation with the RTD probe (Pt100 temperature sensor).
• Select Manual if the temperature for RATA calculation is known. Temperature values can be input in °C, °F, or K.
o Switch to the desired temperature unit and change the temperature value in the input field.
o Click OK to save changes.
Click Next at the top right of the screen followed by OK. The screens in Figure 60 will display.
Figure 60. Relative accuracy test audit (RATA) screen
At the top of the screen, the currently measured Oxygen, Temperature, and Pressure values are displayed. Below this,
the Old RATA Mult. value is shown.
 If RATA has not been changed, the display will read 1.000.
5.13.15 Setting RATA reference values
1. Enter the reference oxygen value (oxygen concentration of certified test gas lead into the vessel with the oxygen
sensor or the oxygen value of a reference device) in the O2 Reference field (1) at the bottom of the screen.
2. Click Start next to the New RATA Mult. field (2), as shown in the Status field, to display current sensor phase
values. Wait while the sensor values stabilize until the Status field displays “Ready to Set Value!” (3).
3. Click the Set button (4) next to the New RATA Mult. field and the new value will display.
The New RATA Mult. can also be set manually. Refer to Setting new RATA mult. manually → .
4. Click Save at the upper right of the screen.
5. Click OK.
The display will switch to the MEASUREMENT screen automatically.
 There is no automatic reset for RATA. This feature cannot be manually reset to ‘off’ (1).
5.13.16 Setting new RATA mult. manually
1. Navigate to the New RATA Mult. box and click OK.
2. Use the Up and Down Arrow buttons to change the value (between 0.001 to 9.999) one digit at a time.
3. Click OK again.