9
The coefficient values are hexadecimal. Due to the 9031M’s display,
6 and b look very similar. Hexadecimal values on the 9031M will be
displayed as: A, b, C, d, E, F, 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
If you continue to get an error message after several entry attempts,
contact JENCO Technical Support for assistance.
B. Dissolved Oxygen Calibration
The 9031M offers two options for calibrating dissolved oxygen:
DO% in water saturated air, and a Zero point. If performing a zero
point calibration, you must also perform a DO% calibration following
the zero calibration. For ease of use, JENCO recommends
performing a 1-point DO% water-saturated air calibration.
a. 1-point DO% water-saturated air calibration
1. Connect the LSDO probe to the unit and turn the unit on.
2. Hold the probe in the air gently with the sensor facing down
and press
“Mode”
key to select “Dissolved Oxygen in %”
mode.
3. Wait 3 to 5 minutes for the dissolved oxygen and temperature
reading to stabilize, press the
“CAL”
key to enter the
“Calibration” mode. The “CAL” icon appears on the LCD. The
main screen will display “1013 mBar” (factory default value).
The meter is now ready for atmospheric pressure calibration.
4. To change the pressure factor, use the
“Up”
and
“Down”
keys to adjust the value between 500 and 1125 mBar. Press
“Enter”
key to save the new value and the unit will
automatically go into the next calibration parameter which is
the value of 100% saturation in air. If
“Mode”
key is pressed
instead of the
“Enter”
key, any changes made will be
cancelled and the previous calibration settings will be retained.
5. In this interface, the user can view the calibration value in the
secondary display. Once the value in the main display
stabilizes, press
“Enter”
key to save the new value and the
unit will automatically go into the salinity compensation
parameter. If “Mode” key is pressed instead of the
“Enter”
key,
any changes made will be cancelled and the previous
calibration settings will be retained.
6. The salinity default factor value is 0.0 ppt. To change the
salinity compensation factor, use the
“Up”
and
“Down”
keys
to adjust the value between 0.0 and 40.0 ppt. Press
“Enter”
key to save the new value and the unit will automatically
