Hired-Hand Farm Hand Series: ST Temperature Controllers - Manual (Page 10)

4801-5043 Rev 7/00 Farm Hand ST 9
9. Set Target
The target temperature is the temperature required inside the house. This setting is the
temperature that the controller will maintain. The target temperature is normally reset at different
stages of growth. Setting the correct target temperature is the responsibility of the farm manager.
10. Program Mode Parameters
Settings that are usually set up once per growout, or maybe even just for summer or winter are
referred to as program parameters and are accessed by taking the controller to program mode. For
the Farm Hand “ST” this is mainly limited to Sensor Calibration and heater Off Point options.
To get to program mode, press and hold the “Mode” button for five seconds. When the controller
has entered program mode, the main display will flash between “P5” and the value of this
parameter.
The “P5” is known as a parameter number. All the program items for the controller have a
parameter number assigned to them. The numbers are listed in the table “Program Mode
Parameters” below with a short description of each parameter.
When in program mode, you change the value of certain parameters by using the + and - buttons
as needed. When you have finished with the current setting, press the “Mode” button to move to
the next parameter. The program mode parameters for the Farm Hand “ST” are shown in Table 3.
Table 3. Program Mode Parameters
The target temperature is changed in increments of
±
0.5
°
using + and – buttons.
After adjusting the target temperature, toggle to the next
function by pressing the Mode button, or wait and the
controller will automatically return to the Room Temp.
parameter.
1.1 Paramet
er
1.2 Description
1.3 P5 This setting is the Heat Shut Off temperature.
1.4 P6
This setting Enables or Disables the Mister Timer for the Last Cooling Stage.
OFF - Stage operates as standard ON/OFF stage.
ON - Stage operates as a Mister Timer (Refer to Section 7.2).
1.5 P7 This setting is the Mister Timer Cycle in minutes. (Refer to section 7.2).
1.6 P41
This is the software version number. Not Changeable.
1.7 P42 This is the Setup Number which represents the controller type. Not Changeable.
P51
This is the calibration temperature for Sensor 1.
Instructions: With the controller operating, use a digital thermometer or similar
independent temperature measuring device to measure the temperature at Sensor 1
location. With P51 selected, use the + and – buttons to set the calibration temperature to
the thermometer reading.
1.8 P52
This is the calibration temperature for Sensor 2.
Instructions: Same as Sensor 1 except substitute P52 for P51 in the instructions above.