TECHNICAL INFORMATION
24
87-900-120-01 (A)
Pump
on
The “Pump on” command allows temporary disabling of
intake and analysis of the gases using the probe.
When “Gas sampling” is disabled, the PHD-4 is in
stand-by status; the screen page displayed is the
measurement page where the indication “Ready”
replaces that referring to the leak rate measured.
To return to operating status, press soft-key 3 (PUMP)
or return to the QUICK/Gas sampling/enable menu.
Audio
on
Disabling the “Audio on” command, it is possible to
mute the acoustic signal proportional to the leak rate
emitted by the PHD-4 in the operating phase.
NOTES
The acoustic signal on the rear door “Headset” is never
disabled.
NOTES
The HID features two different acoustic signals to
highlight different operating conditions:
- High tone for user messages
- Medium tone for leak rate
Backlight
on
Disabling the “Backlight on” command, it is possible to
switch off backlighting of the display.
Re-enable the “Backlight on” item of the “Set-up” menu
in order to switch on display backlighting again
permanently.
Backlighting of the display can be switched on for a few
seconds pressing soft-key 2 in the measurement
screen page, identified by the symbol (
).
Switch
Off!
At the end of the work session, the “Switch Off!”
command can be used to power off the device. To
prevent accidental switch-off, the HID requests
confirmation before switching off the PHD-4.
A fast link to the same switch-off function is present
during the measurement phase on the 3
rd
key of the
front panel.
Option menu
The “Option” collects together all the main settings of
the PHD-4. The following items can be accessed:
Language
Using the “Language” menu, it is possible to set the
language used by the Human Interface Device to
communicate with the operator. There are four possible
options
English
Italiano
French
Deutsch
Unit of measure
From this menu, it is possible to set the unit of
measurement to be used when tracing leaks.
Possible options include:
PPM
mbarL/sec
cm
3
/sec
cm
3
/min
TorrL/sec
PaL/sec
Pam
3
/sec
SCF/year
Kg/h
R12
g/year
R12
NOTES
The sensor fitted inside the PHD-4 is a helium
concentration sensor, the unit of measurement
proposed automatically by the PHD-4 is PPM (parts for
million).
Use of the flow unit of measurement requires a
conversion that takes into account the flow of gas
sampled and the concentration of helium present in the
tracer gas.
For this reason, as soon as the unit of measurement
has been selected, the HID automatically opens the
tracer gas selection menu (% Helium).
