Environmental monitoring
Multiparameter Water Quality Meter
A portable or benchtop meter, often with a submersible sonde, that measures several water quality parameters at once, such as pH, conductivity, dissolved oxygen, temperature, turbidity and ORP.
- Environmental monitoring agencies
- Water and wastewater utilities
- Aquaculture
- Mining and industrial effluent
- Research and education
TROUBLESHOOTING
Common problems, causes and fixes
pH slope below about 95%
Likely causes
- • Ageing or dirty glass electrode
- • Old buffers
- • Clogged reference junction
What to do
- • Clean the electrode (mild acid or detergent as advised)
- • Use fresh buffers
- • Soak the junction or replace the sensor
DO reads high or low after calibration
Likely causes
- • Water droplets on the sensor during air calibration
- • Wrong barometric pressure or salinity setting
- • Damaged sensor cap
What to do
- • Blot droplets and calibrate again
- • Enter local pressure and sample salinity
- • Replace the sensor cap
Conductivity unstable
Likely causes
- • Air bubbles on the cell
- • Fouled electrodes
- • Probe not fully immersed
What to do
- • Tap the probe to dislodge bubbles
- • Clean the cell
- • Immerse deeper
Slow pH response in low-conductivity water
Likely causes
- • Low ionic strength sample
What to do
- • Allow longer equilibration
- • Use an electrode designed for low ionic strength water
Logged data has gaps
Likely causes
- • Low battery
- • Logging interval or memory set wrongly
What to do
- • Replace batteries before deployment
- • Check logging settings and free memory
In LimsPulse · Calibration Management
Keep every Multiparameter meter in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.