Manual Cal - Single Point Calibration - (Zero Gas) Step-By-Step - Ametek OXYvisor Installation, Operation & Maintenance Manual

Calibration
5.12.4 - Calibration - Manual O
Manual O Calibration
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The Manual O Calibration allows for Single Point (Zero or Span) or Two-Point Calibration (Zero & Span). The Two-Point
2
calibration is just a combination of the Single-Point Zero and Span Calibrations that are detailed here in step-
by-step instructions.
Cal-Temp - The calibration temperature can be chosen as ON or OFF. Select ON if the temperature
sensor (Pt1000/Pt100 RTD) is working and accurately measuring the calibration gas near the oxygen sensor
tip. If there is no temperature sensor input or if it is not located in the calibration gas stream near the sensor
then select OFF and manually enter the temperature.

5.12.4.1 - Manual Cal - Single Point Calibration - (Zero Gas) Step-by-Step

Step 1. Via the OXYvisor HMI enter the calibration routine Calibration Menu/Basic Setup/Manual O2 Calibration
Step 2. Introduce Zero Gas - Isolate the sensor from the process or environment and begin flow of the high
quality Zero Gas (e.g. Nitrogen) past the oxygen sensor tip. The sensor measurement technique and accuracy
is independent of flow-rate as it has no membrane, diaphragm nor does it consume oxygen. However the
factory recommends a flow-rate of around 1.5 SLPM with a minimum of 0.5 SLPM to overcome any oxygen
ingress from diaphragms (regulators, etc) and elastomer seals (rotameters, etc.).
Step 3. Select the Cal-Temp ON or OFF. If OFF, enter the correct calibration temperature.
Step 4. Select Single Point Calibration.
Step 5. Then select Input Zero Gas Nitrogen
Step 6. The screen will show "Zero Gas (Nitrogen) Live Values." The displayed oxygen value (PV) and secondary
PV's are now active and will shown the oxygen value as it approaches zero. If the sensor is out of calibration
it may not fully reach zero. Once the Phase Angle, Temperature and Pressure have become stable, press
ENTER to Store the calibration.
Note: The values should be steady and not trending up or down.
Phase Angle Stability: +/- 0.1° , Temp = +/- 0.2 °C
Note: The 4-20 mA outputs are held once the calibration screens are entered. They are released
to the process measurement once exiting the calibration screen or after time-out from inactivity.
5.12.4.2 - Manual Cal Single Point Calibration - (Span Gas) Step-by-Step
Step 1. Via the OXYvisor HMI enter the calibration routine Calibration Menu/Basic Setup/Manual O2 Calibration
Step 2. Introduce Span Gas - Isolate the sensor from the process or environment and begin flow of the Span
Gas past the oxygen sensor tip. The sensor measurement technique and accuracy is independent of flow-
rate as it has no membrane, diaphragm nor does it consume oxygen. However the factory recommends a
flow-rate of around 1.5 SLPM with a minimum of 0.5 SLPM to overcome any oxygen ingress from diaphragms
(regulators, etc) and elastomer seals (rotameters, etc.).
Step 3. Select the Cal-Temp ON or OFF. If OFF, enter the correct calibration temperature.
Step 4. Select Single Point Calibration.
Step 5. Select Enter Span Gas O2 Concentration and then enter the oxygen value of the Span Gas (Save and
Exit). The analyzer will always recall the entered Span Gas value until changed.
Step 6. Select Input Span Gas
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Installation, Operation and Maintenance Manual
Calibration
2
OXYvisor Optical Oxygen Analyzer