18
In both cases when the two buttons are pressed together the display will show
"dEF"
to
indicate that default conditions have been set.
4.6
Storing Calibration and other Power-Up
Defaults
Whenever any data has been changed, which is intended to be retained after power
down, this must be deliberately STORED. This write operation is achieved by holding any
of the 0% or 100% calibration buttons pressed in, whilst pressing and releasing SILENCE.
The display will briefly show
"Stor"
indicating that the data has been correctly stored. It
does not matter which calibration button is pressed, the entire calibration of the
instrument for all channels will always be saved in a single operation.
If instead of showing
"Stor",
the display shows
"Prot",
this indicates that the memory is
protected by the hardware WRITE-ENABLE switch being in the OFF position. This is
Switch 1 of a small 2 way Dual-in-Line switch SW2 on the motherboard. Set it to the
"ON" position and try again. (Switch 2 of this switch is used to disable the internal
alarm.)
The switch need only be returned to the OFF position if it is desired to prevent any
possibility of the data being changed by someone tampering with the front panel.
