Specifications
Instruction Manual    Alpha DO 500 
21 
5.2 Configuration Settings 
Configuration settings let you configure the DO Transmitter to different units of 
measurements (%, mg/l or ppm) set salinity and pressure values. 
ENT
SETUP
HOLD
ENT
ENT
SETUP
HOLD
3
SETUP
HOLD
4
ENT
ENT
ENT
SETUP
HOLD
2
%
SETUP
HOLD
2
ppm
SETUP
HOLD
2
mg/l
1
ENT
ENT
SETUP
HOLD
4
SETUP
HOLD
4
SETUP
HOLD
5
SETUP
HOLD
5
SETUP
HOLD
5
ENT
ENT
ENT
This screen is skipped
if % is selected
11
From measurement mode press ENT key to enter setup mode as 
described in section 5.1. The LCD shows the first screen of setup mode 
(COF). Press ENT key to access configuration setting (COF). 
2
Selecting unit of measurement for DO: The display shows the ‘SEt 
Unit’. The right corner of the LCD shows currently configured unit of 
measurement for dissolved oxygen. 
Press  or  key to select the desired unit of measurement (% or ppm 
or mg/l). Press ENT key to confirm your selection. 
If ppm or mg/l is selected for unit of measurement: 
3
Setting salinity value: The lower display shows ‘SAL’. The upper 
display shows currently configured salinity value. (default is 0.0 ppt) 
Press  or  key to adjust the upper display to the required 
salinity value. Allowable range is 0.0 to 50.0ppt. 
Press ENT key to confirm the value. 
NOTE: This screen does not appear if % was selected in step 2. 
The DO transmitter moves to step 4. 
4
Setting units of measurement for pressure: The upper display shows 
‘PrE’. The lower display shows currently configured unit of measurement 
for pressure. Press  or  key to select the required unit of 
measurement for pressure (Hg or PSI or Bar). Press ENT key to confirm 
the selection. 
55
Setting pressure value: The upper display shows previously set 
pressure value (if any); otherwise it shows the default value. The lower 










