Walchem WebMaster ONE Instruction Manual page 75

Low Alarm Limit
Type in the text box the sensor process value below which you want a low alarm to occur.
Low-Low Alarm Limit
Type in the text box the sensor process value below which you want a low-low alarm to occur.
Alarm Dead Band
Type in the text box the dead band to be used for each alarm set point.
Damping
Damping is applied to the sensor input by taking a running average of the readings of the input
signal over the time frame specified by the damping setting (0-60 seconds)
is displayed and used for control. Type in the text box the desired time frame.
Temperature
Note: The temperature sensor detection is checked when the WebMasterOne is powered up.
Make sure that the sensor connections are made prior to turning on the power. If no temperature
sensor is detected at power-up, this menu will not appear.
For conductivity and pH sensors, the temperature signal or manually entered temperature is used
for automatic temperature compensation of the sensor reading, data logging, and control. For other
sensor types, the temperature signal may be logged of used to control an output, but it is not used
to correct the sensor reading.
Current Temperature
Displays a live reading of the temperature of the system water.
Status
Possible status messages are; Normal (everything is OK), Sensor Error (the signal is not valid),
High Alarm, or Low Alarm. See section 8.1 for a complete description of error messages.
Calibrate
Click on the "Calibrate" button and a new window will open that read "To Modify the Current
Value", and displays the current reading and a text box in which to type the actual value. Measure
the temperature of the sample with a thermometer, and type the actual value into the text box.
Click the Submit button. The new value will be displayed. Click the Close button to close the
calibrate window.
Temperature Units
Click on the radio button to select units of measure of either Fahrenheit or Celsius.
Uncalibrated Temperature
Displays the temperature reading before correcting with calibration constants. This is helpful for
troubleshooting.
High Alarm
In the text box, type the maximum temperature that you would reasonably expect to see for the
sample. This is helpful to detect a faulty or poorly calibrated temperature sensor.
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The averaged reading
.