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18
GF 9950-10 Six Channel Transmitter
High
Setpoint:
Relay is on when the measured value is greater than or equal to
the setpoint. The relay turns off when the measured value is less
than or equal to the High Setpoint - Hysteresis.
Hysteresis
Time
Low Setpoint
Process
Low Se Hysteresis
Hysteresis
Time
High Setpoint
Process
High Setpoint - Hysteresis
The 9950 relays are selectable and con
fi
gurable and can be
used as switches that respond when the process value moves
above or below a user-de
fi
ned setpoint or it can be used to
generate a pulse at a rate proportional to the process value.
They can be used for Low Alarm, High Alarm or Proportional
Pulse triggering related to the process value. All relay
functions are set up in the RELAY menus.
Relay energized
Relay de-energized
Low
Setpoint:
Relay is on when the measured value is less than or equal
to the setpoint. Relay turns off when the measured value is
equal to or greater than the Low Se Hysteresis.
Relay Modes
Window
In/Out:
Relay is on when the value is equal to or higher or lower than
the high or low setpoint.
WINDow IN = relay on if measurement is inside the window
of two setpoints.
WINDow OUT = relay on if measurement is outside the
window of two setpoints.
Proportional Pulse Operation:
The transmitter can output a pulse at the rate de
fi
ned by the settings
in the CAL menu and the sensor input. The maximum pulse output
is 300 pulses per minute. Example usage would be to control
solenoid-operated dosing pumps.
For example: As the process value rises above the setpoint, the
output will start pulsing in relation to the process value,
the maximum pulse endpoint and the programmed
pulses/minute. The pulse rate will change as the process value
changes and approaches the programmed endpoint. This
functionality can be used to precisely control the process.
The starting point, endpoint and maximum pulse rate are select -
able in the RELAY menus.
NOTE:
Relay LEDs will
fl
ash in PULSE mode.
In the example:
• The output will be 0 pulses/min. when value is less than 5.
• The output will be 50 pulses/min. when value is 7.5.
• The output will be 100 pulses/min. when value is 10 or greater.
Time
High Limit
Hysteresis
Low Limit
Process
Window
Window OUT example
10
5
Relay Output Rate:
0 to 100 Pulses/min.
Pulse rate
0 pulses
100 pulses
7.5
Starting point
Endpoint
100 pulses
Time
High Limit
Hysteresis
Low Limit
Process
Window
Hysteresis
Window IN example