HT instruments HT327 - Manual (Page 8)

HT327
EN - 7
4.2. DESCRIPTION OF FUNCTION KEYS
4.2.1. HOLD
key
By pressing HOLD key the measured value is frozen on the display where the symbol
"HOLD" appears. Press again HOLD to disable this function and resume normal operation.
4.2.2. PK/REL
key
This key have the double function of measuring max/min peak values (active for
V and
A positions of rotary selector) and performing relative measurements (REL) for V, A,
Hz,
/
, , and
A positions of rotary selector.
Press cyclically PK/REL to measure and save peak values. “P
MAX
” and “P
MIN
” symbols on
the display correspond to Maximum Peak and Minimum Peak values respectively which
are 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 , ,
A
and A positions) and the selection of a double function which are included on selector
(by choosing between
 and
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 1second or rotate the selector to exit from this function and restore the “AUTO”
symbol at display. By moving the selector in
/
position the resistance measure is
selected on meter and “
” symbol is shown at display. Press R/SEL key to activate
continuity test (the symbol “ ” is shown). Press again R/SEL key to back to resistance
measurement.
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
The instrument switch off after 30 minutes of idleness. To disable this feature:
 Switch OFF the meter
 Switch ON the meter keeping pressed PK/REL, MX/MIN and R/SEL keys. The “ ”
symbol disappear at display