Water Quality Analyzers Part A Flashcards
What are environmental water guidelines for?
1) Effluent limits
2) Protection of water uses
3) Science based recommendations
What are the water uses that get protected?
1) Aquatic life
2) Agriculture
3) Recreation and aesthetics
4) Raw water for drinking
Industrial water supply
What is a guideline?
A numerical concentration or a narrative statement which is recommended to protect a specific use of water
What material do liquid analyzers use as their major component?
Water
What are the 3 liquid analyzer applications?
1) Product quality monitoring and control
2) Environmental
3) Safety
pH analyzers measure the water’s __________.
acidity or alkalinity (how basic it is)
What are the 3 applications that require liquid analyzers to measure water quality?
1) Wastewater
2) Drinking water
3) Boiler feedwater
What are the 4 basic water quality parameters that is typically monitored?
1) pH
2) Turbidity
3) Dissolved Oxygen
4) Specific ions like Chlorine
Before performing maintenance on a liquid analyzer the operator must read ____________ and ____________.
Manufacturer’s manual and MSDS
Before removing a sensor what 2 things must be done?
1) The process must depressurize
2) The process drains below insertion hole of the sensor
What is used when it is impossible the depressurize and reduce the level of the process?
Retractable sensor that will enter the process line with a ball valve.
An electrochemical cell converts _________ energy into __________ energy.
Chemical, electrical
What are the 4 parts of a pH analyzer?
1) A reference electrode half-cell
2) A pH sensitive measurement electrode half-cell
3) Very high input impedance amplifier
4) A transmitter that converts cell voltage into a pH signal
The polarity of the glass measurement electrode voltage is negative in acidic liquids. (T/F)
False; the polarity of the glass measurement electrode is negative if the solution is basic
What does the Nernst equation calculate in electrochemical cells?
Voltage
