5
dissolved oxygen in parts per million (ppm).
To change the mode:
1. Press and hold
MODE
for 2 seconds and the display will begin to scroll
through the available units of measure :
◊ % saturation
◊ dissolved oxygen, mg/L (milligrams per liter)
◊ dissolved oxygen, ppm (parts per million)
2. When the desired units are displayed, release
MODE
and the unit will return
to normal operating mode.
Note: The ‘HOLD’ function cannot be on when changing the measurement
function. If ‘HOLD’ is displayed in the lower left corner of the display, briefly
press the MODE button to turn it off.
Auto-Power Off Feature
The auto power off feature automatically shuts the meter off 10 minutes after
the most recent button press. To disable this feature, refer to the Disable Auto-
Power Off section.
Disable Auto-Power Off Feature
With the meter
ON
, momentarily press
CAL
, then quickly press and hold both
MODE
and
ON/OFF
until ‘oFF’ is displayed. To restore the Auto Power Off
Feature turn the meter off and on again using
ON/OFF
.
Low Battery Indicator
When the battery voltage falls below the operating threshold, ‘BAT’ will appear
on the display. Refer to the Maintenance section for battery replacement
information.
Storing Readings
1. Press
MODE
to store a reading. The storage location number will be
shown on the lower display and the main display will show the stored
reading. The meter will enter the HOLD mode and ‘HOLD’ will appear on the
display.
2. Press
MODE
again to exit the HOLD mode and return to normal operation.
The next time
MODE
is momentarily pressed another reading will be
stored and so on.
3. If more than 25 readings are stored, previously stored readings, starting
with reading number 1, will be overwritten.
Recalling Stored Readings
1. Momentarily press the
CAL
and then, within 4 seconds, momentarily
press
MODE
. The last stored data point location will be displayed (1 to 25).
Each time
MODE
is momentarily pressed the next most recently stored
data point will be displayed.
2. After the last data point stored is displayed, press
MODE
again to return
the display to the beginning of the list.
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