X-320M™ User's Manual
Installation and Setup
-
1-Wire Bus:
This option is used if the connected sensor uses the 1-Wire Bus Protocol to
measure temperature.
-
Rmt Analog 1-4:
This option is used if the connected sensor is an analog sensor that is
being read from a remote Analog device, such as another X-320™ or Analog Module.
1-Wire Address (only shown if 1-Wire Bus is selected in Sensor Connection)
Each 1-Wire sensor comes from the factory with a unique, non-changeable address. When the
Temperature
tab is selected, X-320M™ scans the bus for sensors, the addresses of the sensors
that are found on the bus are listed in the drop-down list.
Once a sensor is found on the bus, select the appropriate sensor address from the drop-down list to
enable that sensor for temperature measurement.
Note: When the Davis Adapter Kit is used with the Davis Instruments ISS the same 1-Wire address
will be used for both temperature and humidity. This is the only case when a 1-wire address is
shared.
Slope
In many cases, the inputs must be scaled to represent “real-world” measurements. X-320M™ reads
the “raw” value from each input, and calculates the number that represents the “real-world”
measurement that the user is actually interested in. This real-world value (referred to as the “Scaled
Value” in this manual) is calculated using the following linear formula:
Scaled Value = Slope * Input + Offset
The Scaled Value is displayed on the
Status Page.
It is also used to determine alarm conditions,
and is shown in email messages.
“Slope” in the formula above is provided by the user and is entered in this field. The value is used to
scale the input to the range of detected condition.
The default value for this field is
1
.
When the Slope is set to 1 and Offset is 0 (default values), the Scaled Value equals the Input Value.
Offset
The “Offset” is used for the “zero” measurement. The default value for this field is
0
. When both the
slope and offset are set to their default values, the Scaled Value equals the Raw Input.
Units
This drop-down allows you to specify the units of measure for the temperature sensor. The units
selected will be determined by the slope and offset used to calibrate the sensor.
The default units for temperature are in Fahrenheit. The following settings should be used:
Slope: 1.00
Offset: 0.00
For Celsius, use the following Slope and Offset:
Slope: 0.555
Offset: -17.777
Xytronix Research & Design, Inc.
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