Mx/Mn Key; R/Sel Key; Backlight Key ( ); Disable Auto Power Off - Refco X-475 Instructions

continuously updated by the meter. By keeping pressed PK/REL key for at least 3 seconds, "CAL"
symbol appears on the display and the meter performs an auto calibration permitting a higher
accuracy on peak measurements. To exit this function keep pressed PK/REL for at least one
second or rotate the selector on another position.
By pressing PK/REL key, the relative measurement is activated: the meter saves the (offset) value
on the display and the "REL" symbol is shown. The following measurement will be referred to this
offset value. By pressing again PK/REL key the offset value is shown and the "REL" symbol is
blinking. To exit this function keep pressed PK/REL for at least one second or rotate the selector
on another position.

4.2.3 MX/MN key

By pressing MX/MN key, maximum and minimum values are measured. Both values are stored
and automatically updated as soon as an higher value (MAX) or lower value (MIN) are measured
by meter. The symbol corresponding to the desired function is displayed: "MAX" for maximum
value, "MIN" for minimum value. MX/MN key is disabled when HOLD function is active. To exit this
function keep MX/MN key pressed for at least 1 second or rotate the selector to another position.

4.2.4 R/SEL key

By pressing R/SEL key the manual selection of measured range (exception
positions) and the selection of a double function which are included on selector (by choosing
between Ω measure and AC or DC Current) are possible. The "MANU" symbol is shown at
display by pressing R/SEL key and the cyclically pressure of the key change the measuring range
and fix the decimal point on the display. Press R/SEL key at least 1 second or rotate the selector to
exit from this function and restore the "AUTO" symbol at display.

4.2.5 Backlight key ( )

By pressing key it's possible to activate the backlight function on the display. The function
automatically disabled itself after some seconds and is available on each position of the rotary
selector.

4.2.6 Disable Auto Power OFF

When the meter is to be used for long periods of time, the operator might want to disable the Auto
Power OFF function. Once the Auto Power OFF function is disabled the meter stays on
continuously. To disable the Auto Power OFF function:
•
Switch OFF the meter.
•
Turn ON the meter keeping pressed PK/REL, MX/MIN and R/SEL keys.
•
The AutoPowerOFF function is automatically activated when turning ON again the meter.
EN-7
, ~A and A