Hach-Lange BODTRAK II: Respirometric Biochemical Oxygen Demand (BOD) - Manual (Page 14)

Operation
14
4.1.1 Channel selection keys
Push the related channel selection key to show data for one of the 6 bottles.
The channel selection keys are also used in the instrument setup menu to choose a
parameter to be edited ( Table 3 ).
4.1.2 The arrow keys
The display shows a graph of BOD values on the vertical axis and time in days on
the horizontal axis. Push the left and right arrow keys to move the cursor along the
BOD curve to show the approximate coordinates (time, BOD) of the selected data
point.
The time interval and BOD value of the data point are shown in the lower right of
the display. The cursor is automatically placed at the most recently collected data
point in a channel display.
Push and hold the two arrow keys at the same time to go into the instrument setup
menu. The arrow keys are also used to change the time, date, test length and
range.
4.1.3 The ON key
To access the range selection menu, push the ON key from a channel display
screen. Then push and hold the ON key to start the test for the selected channel.
4.1.4 The OFF key
When a test is in DELAY or RUN modes, pushing and holding the OFF key
manually ends the test. The instrument will display END. The OFF key is also used
to exit the instrument setup menu or range selection menu. Any changes made
prior to exit will be saved.
4.2 Bottle connections
Each bottle position/channel has the applicable tube numbered with a plastic
sleeve. The bottle positions are numbered 1 though 6 with number 1 in the back left
corner of the chassis. Use the channel selection keys as a guide.
Table 3 Channel key setup parameters
Channel Parameter
1 Year (0-99)
2 Month (1-12)
3 Day (1-31)
4 Hour (0-24)
5 Minute (0-59)
6 Test Length (5, 7, or 10 days)