Page 9
Calibration
Oxygen ...................................
Zero in Sodium Sulphite (Na
2
SO
3
)
solution
Span in Air
Oxygen Sensor Span Range .. 65 to 200%
Oxygen Sensor Zero Range ... 0 to 7.5%
Temperature ........................... Use a reference thermometer.
Temperature Sensor Offset .... -10.0
o
C to +10.0
o
C
Memory ....................................... 3600 readings including date and time
Automatic Logging ......................
User-set for one reading every 1 to 90
seconds, 1 to 90 minutes, or 1 to 24 hours.
RS232 Output ............................ 300, 1200 9600 & 19200 baud.
8 bits, no parity, 1 stop bit, XON/XOFF
Protocol.
Clock ........................................... Calendar clock displays date, month,
hours, minutes & seconds.
Year is recorded in memory and
transmitted to the RS232 port, but is not
displayed.
Battery Saver .............................. On : Auto switch-off after 5 minutes
Off : Continuous use
Bar Graph display of battery charge
level.
Readout of battery voltage available for
troubleshooting.
Good Laboratory Practices .......... Date, Time and Value of last Dissolved
Oxygen and Temperature calibration
are stored, along with Altitude or
Pressure setting at time of calibration.
This information can be recalled or sent
to the RS232 port at any time.
Power .......................................... 6V NiMH Rechargeable Battery for
approx 50 hours operation.
Dimensions ................................. 195 x 110 x 55 mm
Mass ........................................... Instrument only : Approx 520g
Full Kit
: Approx 2.5kg
Environment ................................ Temperature
: 0 to 45
o
C
Humidity
: 0 to 95 % R.H.