- -
9
+
Automatic turning off
The instrument has an
AutoPowerOff
function that automatically turns the instrument off after about
8 minutes if no key is pressed during the intervening time. The
AutoPowerOff
function can be
disabled by holding the HOLD key pressed down when turning the instrument on: the battery
symbol will blink to remind the user that the instrument can only be turned off by pressing the
<ON/OFF> key.
The automatic turning off function for the HD21...4.2 models is disabled when external power
is used. On the other hand, it cannot be disabled when the batteries are discharged.
FUNC/ENTER key
During normal measurement this enables the display of the maximum (MAX), minimum (MIN) and
average (AVG) value of the measurements captured by the instrument, updating them with the
acquisition of new samples. The acquisition frequency is once a second.
The MAX, MIN and AVG calculation begins upon turning on and is updated when the instrument
is in normal measurement mode. To reset the previous values and restart with a new measurement
session, press FUNC until the message “FUNC CLR” appears, then use the arrows to select YES
and confirm using ENTER.
In the menu, the ENTER key confirms the current parameter and then goes to the next one. Pressed
together with the PEAK/MENU key, opens the menu (please see the PEAK/MENU key
description).
Attention: the data captured using the Record function cannot be transferred to the PC
.
HOLD/
key
It increases the current parameter when used in the menu; when used in measurement mode, it
freezes the measurement in progress, and upon application of pressure on the key, the message
HOLD
appears in the upper side of the display. To return to the current measurement, press the
key again.
Upon turning on the instrument, the
AutoPowerOff
function can be disabled by holding the HOLD
key down (please see the ON-OFF key description).
UNIT key
In measurement mode, it allows selection of the unit of measurement of the pressure (shown in the
central line of the display). By repeatedly pressing the key, the different units of measurement are
displayed in sequence: Pa, hPa, kPa, mbar, bar, atm, mmHg, mmH
2
O, kgf/cm
2
, PSI, inchHg.
This setting changes the information displayed and, only for the HD21...4.2 models, also the
immediate print of data (SERIAL key).
The data recorded using the LOG function (
HD21...4.2
)
keep the chosen unit of measurement displayed during logging.
The unit of measurement associated with the data sent to the printer or PC through the serial
port using the SERIAL function (
HD21...4.2
), must be selected before starting the print function.
