Page 3
Contents
1. Introduction .............................................................................................4
1.1 miniCHEM-DO2Illustration ........................................................................4
1.2 Unpacking Information ................................................................................6
1.3 Specifications...............................................................................................7
2. Operating Modes .....................................................................................8
3. Installation and Set-up............................................................................9
3.1 Connection and Configuration Diagram.......................................................9
3.2 Mounting the Enclosure.............................................................................10
3.3 Mounting the Sensors.................................................................................10
3.4 Terminal Connections................................................................................11
3.5 Setting the Control Limit ...........................................................................11
3.6 Selecting Current or Voltage Output ..........................................................14
3.7 Calibrating the 4 to 20mA Output..............................................................15
4. Calibration..............................................................................................16
4.1 Calibration Procedure.................................................................................16
4.2 Calibration Notes .......................................................................................17
5. Process Monitoring...............................................................................18
6. Automatic Dosing..................................................................................18
7. Manual Dosing.......................................................................................18
8. Fuse Replacement.................................................................................18
9. Troubleshooting....................................................................................19
9.1 Instrument Function Troubleshooting.........................................................19
9.2 Dissolved Oxygen Troubleshooting............................................................20
10. Appendices ........................................................................................21
10.1 ppM (mg/L) Calibration Table ...................................................................21
10.2 Selecting % Saturation or ppM (mg/L) Readout .........................................22
10.3 Selecting YSI or ED1M Dissolved Oxygen Sensor .....................................24
10.4 Cleaning the Dissolved Oxygen Sensor ......................................................26
10.5 Maintenance of the Membrane...................................................................27
10.6 Dissolved Oxygen Sensor Storage ..............................................................27
10.7 Terminal connections when 12V DC option is fitted...................................28
10.8 Relay Output Wiring Examples for mains powered units............................29
10.9 Relay Output Wiring Examples for 12V DC powered units ........................30
11. Warranty.............................................................................................31
12. Drilling Template................................................................................33
