LNC Specialist New Hire Training - Amperometry

_________ is the detection of ions in solution based on electric current or changes in electric current

Amperometric sensors are different from pH and conductivity sensors because:

• A. they use current as the direct output for measurement

• B. they are membrane-based sensors

• C. they are not flow dependent

• Both A and B

• Both B and C

Which of the following components acts as a source of replenishing electrons?

• Electrolyte

• Anode

• Cathode

• Analyte

• Membrane

True or False: The membranes for all types of amperometric sensors are the same. Answer: False

• True

• False

Between what pH values does the FCL need a pH correction? (Do not include the word "pH, use only numbers, example: 1 to 14)

The Rosemount 499ATrDO sensor measures which of the following:

• ppm Dissolved Oxygen

• ppb Dissolved Oxygen

• ppm Free Chlorine

• ppm Dissolved Ozone

• Both A and B

The Rosemount FCL system consists of all of the following parts except:

• 499ACL-01-54-VP Sensor

• Constant Head Flow Controller

• VP6 Interconnecting Cable

• Sample Pump

• Transmitter

The main spares that differ between Rosemount 499ADO, 499ATrDO, and 499AOZ sensors are:

• Membrane retainer and fill plug

• Membrane assembly and sensor fill solution

• Membrane assembly and O-rings

• Cathode and anode

Amperometric sensor span calibration establishes:

• a voltage reference

• the zero current of the sensor

• the sensitivity of the sensor

• None of the above

Where does the reaction take place in an amperometric sensor?

• A. Membrane

• B. Anode

• C. Cathode

• D. in both B and C