Endress+Hauser OXY5500 - Page 53

OXY5500 Gas Analyzer Operating Instructions
Endress+Hauser 53
5.15.4 4-20mA calibration
Use the 4-20mA CALIBRATION screen to calibrate the Output and Input. The analyzer is delivered in the calibrated
state but can be calibrated to other devices in your measurement system.
 Factory calibration will be lost if the analyzer is re-calibrated.
5.15.5 Calibrating the output
Use the following procedure to calibrate the work flow for either Output 1 or Output 2. Refer to Figure 70.
1. Connect a current measurement device to the respective output. This will serve as the reference device.
2. Set the 1st Point value to any low value, e.g., 4.00 mA. The value will be applied immediately.
Click Apply or enter another value.
3. Read the current value shown on the reference device, e.g., 3.90 mA.
Use the +/- symbols in the Adjust column next to the 1st Point value to adjust the values accordingly.
4. Set the 2nd Point value to any high value, e.g., 20.00 mA. The value will be applied immediately.
Click Apply or enter another value.
5. Read the current value shown on the reference device, e.g., 19.54 mA.
Use the +/- symbols in the Adjust column next to the 2nd Point value to adjust the values accordingly.
Example: The analyzer shows a value of 19.54 mA and the value should be 20.00 mA. Click the button until the
desired value is registered.
6. To test the calibration, apply some test points by selecting different percentage values, such as 0%, 25%, 50%,
75%, or 100%, which corresponds to 4mA, 8mA, 12mA, 16mA, and 20mA. Check the values with the reference
device. If satisfied with the calibration, click Save.
Figure 70. Analogues - 4-20mA calibration
5.15.6 Calibrating the input
The procedure for calibrating the input is similar to the output procedure noted above. Use the following steps to
calibrate the input. Refer to Figure 71.
1. Apply a low current to the OXY5500.
2. Enter this value in the Reference column in the 1st Point row.
3. Click the Set button next to the 1st Point when the reading is steady. The last measured value will be displayed
in the top row next to the selected port.
 This value is the uncalibrated value that will be used as the 1st Point calibration value.