TESTO DiSCmini, Инструкция по эксплуатации

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date and time, calibration data and zero offsets. The columns are time (in
seconds), diffusion stage signal (in fA), fi lter stage signal (in fA), temperature (in °C), charging current (in nA),
corona voltage (in kV), fl ow (in lpm), battery voltage (in V) and status (-) respectively.
Tab-delimited text fi les can easily be imported into all common data processing programs.
Checking the Instrument
When you turn on the instrument, it will warm up for 5 minutes. After this interval, it will automatically mea-
sure the zero offsets and start its pump.
When it is cold, the 5-minute warmup interval will not be enough, and you should let the instrument warm
up longer to reach a stable temperature.
Press the menu button once to switch to the raw data screen. You will see the current on each of the stages
(a few fA). These currents should be reasonably stable.
Go to the pump screen, and turn the pump off and on – you will hear whether this is working. When the
pump is turned off, go to the raw data screen, and verify that all stage signals are very close to 0fA, i.e. that
their absolute values are all smaller than 2fA. To verify proper functioning of the pump and that the instrument
is sealing, plug the inlet with a
fi nger for a second or two - the pump should increase its speed audibly. If this
is the case, the instrument may working properly.
Using the Battery Charger
Please use only the supplied battery charger Mascot.
Battery charger
Fire danger! Never use a power adapter for the testo DiSCmini.
Only use the battery charger delivered with the testo DiSCmini instrument.
Charging the battery takes between 2 and 4 hours, depending on the current status of the battery. The LED
on the charger indicates if it is still charging or if charging is
fi nished.
Measuring with testo DiSCmini
The purpose of this application note is to ensure that the data you collect with your testo DiSCmini is as
accurate as possible.
• Turn on the instrument and wait for it to warm up (300 seconds).
• If accurate timing is important, set the instrument clock.
• Unscrew the impactor cap from the impactor body (which can remain in the instrument), and wipe the
cylindrical impaction surface with a soft paper to remove built up dirt.
• Verify that charger, pump and stage heater are on (

, , H visible in display upper right).
• After the warmup phase, the instrument starts measuring, but is not collecting data yet. Optionally per-
form a zero check by connecting a HEPA filter (Article number 98052) to the instrument. Switch to the
current display (press the right arrow button) and verify that the displayed currents are below 1fA
absolute.
• Press the recording button once to start recording data. Warning: if you keep it pressed for more than
about 3 seconds, it will stop recording again. A blinking circle appears on the upper right in the display to
indicate that the instrument is recording. Keep the instrument running for about 1 minute with the HEPA
filter, then disconnect it and perform your measurement.
• Reconnect the HEPA filter for another minute after your measurement. Bracketing your measurement
with zero data is good for quality assurance.
• Press the recording button for about 3 seconds until a beep confirms that the recording has been stopped.
• Run the Java data analysis tool and load the file you just saved.
If any warnings are displayed, follow the instructions in the application note on software warnings