7
6. Test procedure
If possible, the duct section being tested should be
brought to a positive or negative test pressure equal
to the operating pressure p
design
. The standards state
that the the pressure must be maintained to within ±
5% for five minutes*. The test cycle can be stopped at
any time.
The LT 600 automatically configures the test cycle in
normal operating mode.
In laboratory mode, you can use the arrow keys to
configure the test cycle yourself.
If the selected pressure cannot be reached, the
leakage flow rate can be tested at a lower pres-
sure in accordance with DIN EN 12599 and then
extrapolated for the higher pressure. The device
evaluates the lowest pressures itself.
You should then select a lower test pressure – the
device automatically performs the evaluation on the
basis of the airtightness class.
If the measured leakage flow rate is outside the meas-
uring range of the adapter used, change the adapter
(enter the change of adapter).
It is not necessary to correct the test values to take
account of different temperatures or the air pressure.
Please note the relevant recommendations and com-
ments in DIN EN 1507, DIN EN 12237, DIN EN 1507,
DIN EN 15727 and DIN EN 12599.
* This 5 minute requirement is now virtually obsolete
because modern test equipment is generally much
quicker to bring the test conditions to a stable state.
7. Using for the first time, and performing a test
Use the supplied power cable to connect the Lindab
LT 600 to the mains (230 V, 50 Hz or 110 V, 60 Hz) (11).
Switch on the device with the power switch (1). When
the device powers up, the firmware version appears in
the display. If this is the first time the device has been
used, the display shows the user prompts, otherwise
it shows the operating mode most recently selected in
setup.
7.1 Control panel functions
Note that the display (6) changes according to the
selected status. The display shows the test values and
the options that can be selected from the membrane
keypad (8).
Cursor up
Number input up
Letter input up
Scroll
Back
Cursor down
Right
Menu
Number input down
Next
Cursor right
Letter input down
Select
Confirm
New
Stop
Press the MENU key once to go to the main menu and twice to open the input screen for a test.
