1. When the unit is on and the display is showing data, it is updated approximately every 2 seconds.
2. When the system is autologging and turned off, it displays data momentarily when the sensors are read. For example, if it is set to record every 5 minutes, it will save data in the Reader Unit memory every 5 minutes, display it  and send that data out every 5 minutes in RS232 format to the COMMS connector.
3. Whenever the user pushes the STORE button on the front panel of the Reader Unit, data is stored in its memory, momentarily displayed and also sent out to the COMMS connector. 

The three situations are not exclusive. For example while in logging mode the STORE button may be pressed to record data between regular logging readings. 

The Data Format is as follows: 
 
REAL TIME DATA   
SERIAL NUMBER:       6   
                               TEMP  COND  COND  SAL  DO    DO   PH    ORP  TURB  
  DATE       TIME                C  ms/cm us/cm  ppt %sat  mg/l  pH    mV   ntu  
----------------------------------------------------------------------------------  
13/07/01  14:27:19.78          12.9  80.0  8000 60.0  62.0  4.5  4.4  313    0.7  
13/07/01  14:27:21.46          12.9  80.0  8000 60.0  62.0  4.5  4.4  313    0.7  
13/07/01  14:27:22.24          12.9  80.0  8000 60.0  62.0  4.5  4.4  313    0.7  
13/07/01  14:27:23.17          12.9  80.0  8000 60.0  62.0  4.5  4.4  313    0.7 
 
At the end of each line there is a carriage return line feed (<cr> <lf>). There are no blank lines. The communications format is the same as for other situations such as getting the data logged and stored out of the Reader Unit: RS232, 4800 baud, 8 bit, 1 stop, no parity.