1

Introduction to the LI-5405A pCO2 system

What's what

User-supplied materials

Surface water pCO2 measurement principle

2

Installing the pCO2 system

Connecting data cables

Connecting the power supply

Attaching gas standards

Attaching the ambient air supply

Attaching gas analyzer tubing

Attaching the sample water supply

Attaching the waste water discharge tubes

3

Preparing for measurements

Powering on

Checking the setup

Adjusting the water flow rate

Initial configuration

4

Measuring pCO2 in water

Configuring the measurement sequence

After measurements

Final data processing

5

Working with data

Viewing a table of recent measurements

Viewing graphs of measurement data

Exporting data

6

Software tour

System Init.

Device Config.

Exp. Config

Manual DAQ

Data Table

Data Trends

Data Export

Start Sample and Stop Sample

7

Troubleshooting

Water is leaking

Computer mouse cursor moves on its own

The program does not recognize connected devices

Alarm triggered

Cooling system does not work properly

Reference gas measurements cannot meet passing criteria

Gas flow rate too low on water pCO2 measurement

Gas analyzer problems

8

Maintenance

Switching water filters

Cleaning a filter while measurements are underway

Removing the filter for cleaning

9

Specifications

A

Calibrating the dissolved oxygen sensor

B

Calibrating the chlorophyll sensor