Bird Technologies 3171B020 - Manual (Page 46)

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Reset Input
A remote reset could be used in case of false alarm or a brief disturbance has tripped the Wattcher Monitor but left
the transmission intact.
Remote Contact Reset
This option allows reset onsite, but remote from the Wattcher unit. Terminal 8, Reset, is active low and will cause a
reset when the switch is closed, making a connection to terminal 7, ground.
One or several momentary contact, normally open, switches can be connected in series for reset from various locations.
Figure 16 Reset Input
Remote Metering
Any number of meter pairs can be driven by the meter amplifiers up to 1mA into a total load of 470 to 1400 ohms,
with out effecting scale shape. Long line losses are compensated by adjusting amplifier gain and full scale meter cur-
rent after network is balanced and amplifier zero setting. Usually RFI prevention by shielding, using chokes and by-
pass capacitors, is necessary only near the Wattcher unit.
Figure 17 Remote Monitors and Meters
Reflected
M M
Remote
Off Site
Meters
Remote
Off Site
Meters
M M
Forward
Shield
Ground
Shield
Ground
Remote
Off Site
Meters
Remote
Off Site
Meters
+
- +
- +
- +
-