GF Signet 4632 Chlorine Dioxide Analyzer System - Manual (Page 26)

26 463X Chlorine System Manual
1 4 mg/l
Output (pulses per minute)
Ending
Point
Input (mg/l)
Starting
Point
0
20
40
60
80
100
Pulse
Pulse-frequency Operation:
The transmitter can output a pulse at the rate de¿ ned by
the settings in the CALIBRATE menu and the sensor input.
The maximum pulse square wave output from the relays is
400 pulses per minute. Example usage would be to control
solenoid operated dosing pumps.
Example: As the process value drops below the setpoint
(4 mg/l) the output will start pulsing in relation to the process
value, the maximum pulse endpoint and the programmed
pulses/minute. The pulse rate will increase as the process
value decreases and approaches the programmed endpoint.
This functionality can be used to precisely control the
process.
• The output will be 0 pulses/minute when the input value is
greater than 4 mg/l.
• The output will be 35 pulses/minute when the input value is
3 mg/l.
• The output will be 100 pulses/minute when the input value
is 1 or less.
The starting point, endpoint and maximum pulse rate are
select able in the CALIBRATE menu.
Mechanical Relay Functions
The 8630 relays are selectable and con¿ gurable and can
be used as switches that respond when the process value
moves above or below a user de¿ ned setpoint. They can
be used for Low Alarm, High Alarm or Proportional Pulse
triggering related to the process value. Relay functions,
hysteresis and time delay settings are set up in the
CALIBRATE menu and can be tested in the OPTIONS menu.
Low Setpoint:
Relay is energized when the measured value is less than
the setpoint.
Hysteresis
Time
Low Setpoint
Process
Relay energized
Relay de-energized
Hysteresis
Time
High Setpoint
Process
High Setpoint:
Relay is activated when the measured value is higher than
the setpoint.
Time
High Limit
Hysteresis
Hysteresis
Low Limit
Process
Window
Window:
Relay is off within the window of two setpoints minus the
hysteresis. Relay is activated when the value is higher or
lower than the high and low setpoint.
Output Settings