Installing The Sensor - Phonetics Sensaphone 800 User Manual

Chapter 2: Installation
Important Note regarding Ultra-Low temperature freezers:
If you are connecting the Sensaphone to an ultralow temperature
freezer (-80° C) and the freezer is equipped with alarm terminals/
contacts you can connect these directly to one of the zones on
your Sensaphone (refer to your freezer owner's manual for proper
connection.

2.10 Installing the Sensor

After you have selected the sensor, loosen the screw of the alert
zone and its corresponding common (c). Two wire leads are used
to connect any monitoring sensor. Fasten one lead to the numbered
screw and the other lead to C. Tighten both screws. If the zone
was not disabled, the Model 800 may recite its "Alarm Exists"
message as you connect the sensor. If it does, just press ALARM
CANCEL to stop it. Re-enable the zone after wiring. Refer to
Figures 2-6 and 2-7 for connecting a sensor to an alert zone.
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Figure 2-6. Sensor Connected to an Alert Zone
Any sensor can be attached to the Model 800 using 18-26-gauge
wire (#22 recommended). The sensor can be several hundred feet
from the unit, as long as the total resistance of the circuit is not
greater than 50 ohms. Use wire appropriate for the application.
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