4220 Flow Meter Section 5 Options and Accessories
5.11Installation of Parameter Probes in Mounting Rings
Note
You must use the Isco Temperature Probe with the D.O. Probe to provide temperature compensation.
Wrap both the D.O. Probe and Temperature Probe in a damp cloth. Wait ten minutes for it to stabilize, then proceed.
Go to step 1 on the flow meter. Select PROGRAM, then step through the units of measure with Enter until you reach the menu for pH measurement. Select NOT MEASURED. Press Enter. Then D.O. UNITS will appear. Select either MG/L or PPM. Press Enter. Exit the program and
Note that you must select measurement of D.O. in step 1 or the D.O. menu will not appear in step 3. If you cannot get the D.O. menu to appear in step 3, recheck your selections in step 1. Remember that you must select NOT MEASURED for pH in step 1 or D.O. will not appear on the menu for the rest of the program.
SELECT PARAMETER TO ADJUST
NONE LEVEL D.O.
Select D.O. Press Enter. This display will appear:
D.O. CALIBRATION
D.O STANDARD, ABS BAROMETRIC PRESSURE,
Altitude is just off the screen. You can select D.O. STANDARD if this calibration medium is available to you. Do not select ABS (absolute) BAROMETRIC PRESSURE unless you are at sea level or know how to correct for this value. The barometric pressure provided from the Weather Bureau is corrected for altitude. Select ALTITUDE.
ALTITUDE UNITS OF MEASURE
FT, M
Then:
ENTER ALTITUDE
ALTITUDE = XXXXX FEET (or meters)
Enter the altitude for your location. This is critical to the probe's accuracy. The following display will then appear:
WRAP D.O. PROBE IN MOIST CLOTH
PRESS ENTER WHEN STABLE: X.XXX MG/L
The reading is in milligrams of oxygen per liter. If you chose PPM in program step 1 for D.O. units, the reading would be in parts per million.
The parameter probes are installed in essentially the same way as the submerged probe level sensor. The probes and their car- riers snap onto Isco Spring Rings and the base section of Isco
