Walchem WebMaster ONE Instruction Manual page 50

Prop Band (if control mode is intermittent sampling, proportional blowdown)
Use the arrow keys to adjust the distance from the set point where the maximum output activation
time will occur. This parameter will be in the units of measure of the sensor input used to control
the relay. The acceptable range for this set point varies with the input. Press Enter to accept the
new value.
Fixed Time to Feed (if control mode is feed with another relay, feed after another relay (fixed))
Use the arrow keys to set the minutes and press Enter to accept the new value. Then press Next to
move the cursor to the seconds and adjust with the arrow keys and press Enter to accept. Any
value between 1 sec and 1440 minutes is acceptable.
% of Relay to Feed (if control mode is feed after another relay (%))
Use the arrow keys to change the % of the time that the lead relay runs that this relay should run
and press Enter to accept the change. Any value between 0 and 100% is acceptable.
Time Period (if control mode is feed as % of time)
Use the arrow keys to change the length of the time cycle to be used, then press Enter to accept the
changes. Any value between 1 and 1440 minutes is acceptable.
% of Period to Feed (if control mode is feed as % of time)
Use the arrow keys to change the percentage of the time period that will be used to activate the
relay, then press Enter to accept the changes. Any value between 0 and 100% is acceptable.
Spike Point (if control mode is any spike set point)
Use the arrow keys to change the higher set point then press Enter to accept the changes. The set
point value is limited to the range of the sensor input.
Unit Vol to Trigger xxxxx (if control mode is flow-based feed or target PPM)
Use the arrow keys to change the volume of solution that needs to flow through the flow meter in
order to trigger the chemical feed. Any value between 1 and 10,000 is acceptable. Press Enter to
accept the new value.
Output On-Time (min) xxxx (sec) xx (if control mode is flow-based or counter-based feed)
Use the arrow keys to change the amount of time for the relay to be activated, once the previously
specified volume of solution has passed through the flow meter, or counts have been detected by
the digital input. First change the minutes using the arrow keys, then Press Enter. Any value
between 1 and 1440 minutes is acceptable. Press Next to move to the seconds, and use the arrow
keys to adjust the seconds. Press Enter to accept the new value.
Counts Before Trigger xxxxx (if control mode is counter-based feed)
Use the arrow keys to change the number of counts on the digital input that will trigger the relay to
activate. Any value between 0 and 99,999 is acceptable. Press the Enter key to accept the new
value.
Output On Time (if control mode is Dispersant)
Use the arrow keys to change the pump on time (in minutes) then press Enter to accept the
changes. Any value between 1 and 1440 is acceptable.
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