ecom-JN
Page 11
3.3. Soot measurement
A soot measurement is started by pressing
<SOOT>
. A soot measure-
ment at oil-fired systems consists of three suction phases
in which a
volume of 1.63 (+/- 0.07) litres is drawn in. The colour (greyness) of the
soot filter paper is graded according to the 10 level Bacharach scale.
All three individual measurements are recorded. We recommend that
the soot measurements are heated to avoid the filter paper becoming
wet from the condensation which will effect the colour of the soot
deposited. The filter paper assembly in the probe is heated to 70°C.
Electric soot measurement with the ecom-JN
Switch on the heating for the sampling probe by pressing
<SET>
, move
the cursor to
“Probe heating NO”
and press
<E>
to change it to
"YES"
.
<ESC>
leaves the menu.
Place a filter paper into the holder in the probe and press
<E>
to start
the measurement. The volume drawn is displayed and once 1.63 litres
has been reached the greyness value must be entered. To do this,
remove the filter paper from the holder and compare it with the colours
on the scale. If a greater accuracy is required a densitometer (reflec-
tion photometer) can be used which gives a value accurate to one
decimal place. Enter the result and confirm with
<E>
. The cursor now
moves to the second soot measurement. Repeat this procedure until
all three soot measurements have been completed.
The cursor has now moved to the oil derivative display.
<E>
switches
between
“YES”
,
“NO”
and
“—”
. The average is calculated and
automatically stored. Pressing the
<ESC>
key ends the soot
measurement. Press
<SET>
to switch the probe heating off as the
previous settings are stored and would cause unnecessary drain on
the power supply when using the batteries.
S o o t m e a s u r e m e n t
smoke no.1
smoke no.2
smoke no. 3
_ . _
_ . _
_ . _
oil trace: ___ Mean value:
