Installation and Setup
X-320M™ User's Manual
-
Analog 1-4:
This option is used if the connected sensor outputs an analog signal based on
the barometric pressure.
-
Frequency Input:
This option is used if the connected sensor outputs a frequency based on
the barometric pressure.
-
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.
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.
Adjustment:
Depending on the type of sensor and/or the type of barometric pressure reading, the sensor reading
may need to be adjusted so that sea level pressure is the indicated value. The default value for this
field is
None
.
This drop-down allows you to select the adjustment used for the barometric pressure sensor. The
following options are available:
-
None:
No adjustment will be applied to the input value from the sensor
-
Sea Level:
The input value from the sensor will be adjusted to
indicate sea level pressure
Units
This drop down allows you to specify the units for the barometric pressure sensor. The units
selected will be determined by the Slope and Offset used to calibrate the sensor. The following
options are available:
-
inHg:
This option is used if you are measuring the barometric pressure in inches of Mercury.
-
mmHg:
This option is used if you are measuring the barometric pressure in milometers of
Mecury.
-
hPa:
This option is used if you are measuring the barometric pressure in hectopascals.
-
mbar:
This option is used if you are measuring the barometric pressure in millibars.
Page 80
Xytronix Research & Design, Inc.
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