Contech CDO-01 User manual

INSTRUCTION MANUAL
DISSOLVED OXYGEN-METER
MODEL CDO-01
EL-221, MIDC Electronic Zone, Mhape, Navi Mumbai-400710 Tel: 022-

61393000
CHAPTER 1
INTRODUCTION
Contech CDO-01 measures Dissolved Oxygen and temperature of liquids It can be used
in a variety of fields such as industrial, agriculture, environmental studies and scientific
research laboratory
ABOUT CDO-01 MODEL.
Dissolved Oxygen meter, Model CDO-01, is a microprocessor based instrument, which
measures Dissolved oxygen and salinity and temperature of a liquid under test Meter
supports ATC (Automatic temperature compensation) feature which corrects the electrode
output changes due to temperature variation of the sample being tested There is also an
option to enter the temperature of measuring solution manually Also there is an option to
enter the Atmospheric Pressure for correcting changes due to it The following are the
salient features of CDO-01 meter
Advanced Microprocessor based design
DO and Conductivity
DO in Saturation % and mg/L
DO correction for Temperature, Atmospheric pressure and Salinity
Polarographic Electrode
Automatic and Manual temperature Compensation
Single or Multi point calibration of Salinity
Cell Constant adjustable from 0 1 to 10 0
Temperature Coefficient adjustable from 0 to 10%/ oC
Normalisation temperature adjustable from 15 to 30 oC
Bi directional RS232 interface Baud rate selectable from 1200,2400,4800 and
9600
Single and continuous print out of DO and Conductivity
Multiple Printout types Combinations selectable from Sr No , DO/Conductivity,
Date, time and temperature
Real Time Clock
Temperature setting (Manual temperature compensation)
Calibration report as per GLP requirements
LCD display with Backlight
Memory storage of 100 measurements
Data logging facility up to 500 results Data logging interval selectable from 5S,
10S, 20S, 30S, 1M, 2M and 5M

Temperature calibration
Atmospheric Pressure Entry
CHAPTER 2
DO METER DISPLAY
DO METER KEYBOARD

CHAPTER 3
BASIC OPERATION AND SETUP PARAMETERS
3.1 POWER AND INSTALLATION REQUIREMENTS
The meter requires good stable power Meter is supplied with a 9V/1A switching adapter
Connect the adaptor to the instrument to the power jack located at the rear side of the
meter Connect the adapter to an AC power outlet Meter is supplied with a probe
Connect the electrode to the BNC connector provided at the rear side Connect the
temperature probe to the temperature input connector
3.2 STARTING THE METER
Switch on the meter by pressing the key Instrument goes through self-tests and
subsequently display the measured Saturated DO say 99 7%

3.3 CHANGING MODES.
Use to change between DO and CONDUCTIVITY modes
Press key to change between Saturated DO %, Do in ppm and mg/L
3.4 SETUP PARAMETERS
3.4.1 SETTING DATE AND TIME.
Meter has an inbuilt Real Time clock Hence there is no need to change or update date
and time However it is possible to change date and time

Press key The Meter displays
and subsequently displays
Press or key till it displays
Press key Meter displays current date say 07 Follow the instructions below for
changing date, month and year
Meter Displays the current time, say 12 23 45

Press key to change hour Follow the instructions below for changing
Hour and Minute
3.4.2 TO SET BAUD RATE
Press key The Meter displays
and subsequently displays

Press key Meter displays the set baud rate say 9600
Press or key to change between 1200, 2400, 4800 and 9600 and press
key to save
Press key to quit without saving
3.4.3 TO SET TEMPERATURE For Manual Temperature
Compensation)
Press key The Meter displays
and subsequently displays
Press or key till it displays
Press key
Meter shows the set or default temperature (25oC)
Press or key to change temperature and press key to save
Press key to quit without saving
3.4.4 TO SET READING SERIAL NUMBER

Press key The Meter displays
and subsequently displays
Press or key till it displays
Press key Meter shows the current serial number
Press or key to change the serial number and press key to
save
Press key to quit without saving
Press key to make the reading 0000
3.4.5 TO SET PRINT OPTION
There are 2 options : and
- Press key to print current DO/Cond through RS232 port
- Continuous data transfer to computer/printer through RS232 port
Press key The Meter displays
and subsequently displays
Press or key till it displays
Press key Meter displays the current mode, say One

Use or keys to change between
and and Press key to save
Press key to discard changes and quit
3.4.6 TO SET PRINT FORMAT.
There are 6 print formats available in the meter
- ONLY DO/Cond
- SERIAL NO, DO/Cond
- SERIAL NO, DATE,DO/ Cond
- SERIAL NO, TIME, DO/Cond
- SERIAL NO, DATE, TIME, DO/Cond
- SERIAL NO, DO/Cond, TEMPERATURE
To change the format,
Press key The Meter displays
and subsequently displays
Press or key till it displays
Press key Meter displays the current mode
Use or keys to change between PRF-1 to PRF-6 and press
key to save