Walchem WebMaster ONE Instruction Manual page 47

Calibrate 1 Pt (if not in Fluorometer Mode)
The 1-Point Calibration allows you to adjust the current reading of the process value to match
what the actual value is as measured by some independent method (such as a laboratory
measurement or handheld instrument). The software will maintain the "4 mA =" setting used to
scale the input, and adjust the "20 mA =" setting to make the reading accurate at the value entered
in the 1-Point Calibration.
Current mA
Displays a live reading of the mA output of the transmitter.
Current
Displays the live calculated process value, using the existing 4 mA = , 20 mA = and Units
settings.
New
Use the arrow keys to enter the desired new reading for the process value. Use the Arrow
keys to fill in the new value, then press the Enter key to highlight 'CONTINUE', then
press Enter again to put the value into memory.
At the end of the calibration, the display will tell you if the calibration was successful or if
the calibration failed. If successful, press the Enter key after the sensor has been replaced
into the sample stream to resume control. If failed, refer to Section 8 for troubleshooting
help.
Calibrate 1 Pt (Fluorometer Mode)
The 1-Point Calibration allows you to adjust the current reading of the process value to match
what the actual value is as measured by some independent method (such as a laboratory
measurement or handheld instrument). The software will maintain the "4 mA =" setting used to
scale the input, and adjust the "20 mA =" setting to make the reading accurate at the value entered
in the 1-Point Calibration.
Current mA
Displays a live reading of the mA output of the transmitter.
Prod Level
Displays the live calculated process value, using the existing 4 mA = , 20 mA = and
Dye/Prod settings.
New
Use the arrow keys to enter the desired new reading for the dye concentration in ppb. Use
the Arrow keys to fill in the new value, and then press the Enter key to tab to the next
menu.
Dye/Prod
The Dye-to-Product ratio is the ratio of the fluorescent dye in ppb to the active ingredient
in the chemical product in ppm. Use the Arrow keys to fill in the ratio (given to you by
your chemical supplier). Press the Enter key to highlight 'CONTINUE', and then press
Enter again to put the value into memory.
At the end of the calibration, the display will tell you if the calibration was successful or if
the calibration failed. If successful, press the Enter key to resume control. If failed, refer to
Section 8 for troubleshooting help.
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