Calibration of Amperometric Sensors and its Diagnostics

Raw current value at which zero calibration is performed.

Which among the following can be added to the tap water to make a zero solution for Dissolved Oxygen.

• Sodium Sulfite

• Sodium Bisulfite

• Nitrogen Gas

• Salt

Most Amperometric sensors generate a small current in the absence of analyte. This small current is called either ________ or ____ current.

What is the typical zero current for 499AOZ.

• < 200 nA

• -10 to +50 nA

• -10 to +10 nA

• 5nA

Calibrating an oxygen sensor in ambient air produces the no error when the temperature is high and the humidity is low.

• TRUE

• FALSE

In zero calibration, place the sensor in zero solution for at least _ hours.

The slope of the calibration curve is the _ of the sensor.

What is the expected sensitivity of the Free Chlorine sensor 499ACL-01.

• 900-1200 nA/ppm

• 250-450 nA/ppm

• 200-600 nA/ppm

• 1800-3000 nA/ppm

What is being established after the Amperometric sensor is span calibrated

• The sensitivity of the sensor

• The zero current of the sensor

• A voltage reference

• None of the above

If the typical current during measurement is substantially greater than the zero current, the zero current can be ignored.

• TRUE

• FALSE