GF Signet 2551 Magmeter Flow Sensor - Display - Manual (Page 15)

15 2551 Magmeter
9. Relay Menus
Magmeter models 3-2551-21 and -22 have two dry contact relays (Relays 1 and 2) and one Solid
State relay (Relay 3).
Any of these relays can be set to any of the operating modes listed below.
The setpoint values for HIGH, LOW and WINDOW modes can be set to negative values if required.
For example, a LOW alarm might be set to activate if the À ow rate falls below -10 GPM.
Negative values are not available for relays in PULSE or TOTAL modes.
Off: If a relay is not used, it can be turned Off to prevent contact wear.
9.2 Total Relay mode
Program a relay to activate when the Resetable totalizer reaches a speci¿ c value. The maximum setting is 999999.
Application example: A ¿ lter must be replaced in an R.O. system every 10000 gallons. The service representative that installs a new
¿ lter sets relay 3 to Total mode, sets the setpoint at 10000 and resets the totalizer to 000000.00. Every time the Totalizer reaches
10000, the relay activates and lights a message indicator to remind the service representative to replace the ¿ lter.
When the totalizer is reset, the relay will be deactivated and the process begins anew.
9.1 Pulse Relay mode
Program a relay to activate for a ¿ xed period, for each volume of À uid that passes the sensor.
For example, program the relay to pulse once for 100 ms for every 3 gallons that pass by the sensor.
Relay 1 Mode
Pulse >
Relay 1 Width
0.1 secs >
Relay 1 Volume
0.0000 Gal >
Relay Volume: Set the volume of À uid that the 2551 must
measure before activating the relay for one pulse.
Pulse Width: Adjust the length of time the relay will remain
activated. The pulse width setting is dependent on the type of
external equipment being connected to the relay.
Relay 1 Mode
Total >
Relay 1 Set High
000000 >
3s
ENTER
Or
Signet Magmeter
RELAY 1 RELAY 2
ENTER
1234.56 GPM
876543.21 >
Enter Menu
>
Enter Menu
Setup >
Enter Menu
Calibration >
Enter Menu
Relay 1 >
NOTE: The Security Code must be entered
before modifying the relay menu.
Enter Code
0000