7800-25 Series Operations Manual
Rev B 11-10-2020
Page 19 of 56
Using the Keypad
This control system uses a numeric keypad to enter all parameter values. Similar to a
calculator, this allows quick and precise entry of values. When any numeric value button
is pressed, the keypad display will pop up over the current display.
The Parameter Description Header tells what parameter is being changed.
The Keypad Display shows allowable values of the parameter being changed (initially)
and displays the entered value (when a button is pressed).
The Escape “Esc” button aborts the entry and returns to the previous screen without
changing the value. The Clear “Clr” button erases the value that you have entered. After
you have entered the value that you want, pressing the Enter “Ent” button and the new
value will take affect. This also closes the keypad window. Other keypad buttons include
a decimal point button and negative button.
If an invalid numeric button is pressed such that it would create an entry above the
parameter’s range, the entered number will not display. For example, if the temperature
setpoint range is 5.0 to 70.0, pressing ‘8’ followed by an ‘0’, only the ‘8’ will display.
If an invalid entry is made with an entry below the range (such as a ‘4’ followed by the
‘Ent’ button), then the entry will clear and the range will be re-displayed.
Escape
Parameter Description
Header
Keypad
Display
Range of variable
Negative sign
Enter
Clear
Decimal
