Offset/differential method, Programming the system – Hired-Hand System 2000 AUTO TEMP User Manual
Page 5
System 2000 AUTO TEMP
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5. Offset/Differential Method
5.1. Offset:
The point above (cool) or below (heat) target temperature where the stage turns off.
5.2. Differential:
The difference in degrees between the temperature a stage comes on and the temperature the
stage goes off.
5.3. Examples
5.3.1. Heat Mode:
If the Target Temp is set at 80 degrees, Offset set at 4 degrees, and Differential set at 2
degrees, The System will engage Heat Mode when building temperature reaches 74
degrees and the curtains are closed.
Target Temp
-
Offset
-
Differential
=
Heat Mode on
80
-
4
-
2
=
74
If the Target Temp is set at 80 degrees, Offset at 4 degrees and Differential set at 2
degrees, The System will disengage Heat Mode when building temperature reaches 76
degrees.
Target Temp
-
Offset
=
Heat Mode Off
80
-
4
=
76
5.3.2. Cool Mode:
If the Target Temp is set at 80 degrees, Offset set at 5 degrees, and Differential set at 2
degrees, The System will engage the fans when building temperature reaches 87
degrees.
Target Temp
+
Offset
+
Differential
=
Cool Mode On
80
+
5
+
2
=
87
If the Target Temp is set at 80 degrees, Offset set at 5 degrees, and Differential set at 2
degrees, The System will disengage the fans when building temperature reaches 85
degrees.
Target Temp
+
Offset
=
Cool Mode Off
80
+
5
=
85
6. Programming the System
Programming the System 2000 Auto Temp Controller is like many other things--at first glance it looks
complicated, but if taken one step at a time it is really easy. In terms of programming the controller can be
broken down into two components. The first component is the group of functions which are present on the
facepad itself. These items are located on the facepad because they are the functions which are most often
used by the grower. The second level of programming is called the Program Features. These functions are
located by using the Select Features up and/or down arrows. These features aren't used as often as the
features on the facepad, but will be changed from time to time.