Pressure And Elevation; Selecting Atmospheric Pressure - Hach LDO User Manual

5.4 Sensor Setup Menu (continued)
DIAG/TEST
SOFTWARE VERS.
Displays the software version number
DRIVER VERS
Displays the software driver version number.
GAIN CORR
User Editable—to change the calibration gain. Range: 0.000–3.0
OFFSET CORR
User Editable—to change the calibration offset. Range: -3.0–3.0
PHASE DIAG
Information only—updated once per second
AMPL DIAG
Information only—updated once per second
SERIAL NUMBER
Serial number of the sensor

5.5 Pressure and Elevation

5.5.1 Selecting Atmospheric Pressure

Elevation in feet Barometric pressure in mm Hg
0
500
Note: If the barometric pressure from
combination with this value must be 0 feet.
Table 4 can be used to estimate the true barometric pressure at certain elevations. The
correspondence is based on the assumption that at sea level the barometric pressure is
760 mm Hg. After determining the barometric pressure from the table or obtaining it from a
local weather service, enter this value into the instrument, see
1. From the Main Menu, select SENSOR SETUP and confirm.
2. Select the appropriate sensor if more than one is attached and confirm.
3. Select CONFIGURE and confirm.
4. Select AIR PRESS/ALT UNITS. Select the appropriate units and confirm.
5. Select AIR PRESS/ALT. Change the value using the keypad and confirm the selection.
Note: AirPress/Alt must be correct for proper measurement of % saturation and operation of
air calibration.
Table 4 Elevation Barometric Pressure
760
746
Table 4 is entered in the meter, the altitude entered in
Elevation in feet Barometric pressure in mm Hg
6000
6500
Operation
section 5.6.1 on page 24.
613
601
23