RBR ecom-JN User manual

Operating Instructions
Creative technology made by rbr

ecom-JNPage 2
Index Page
1. Introduction 3
2. Equipment 4
3. Flue gas measurement
3.1. Flue gas analysis 7
3.2. Draft measurement 10
3.3. Soot measurement 11
3.4. CO measurement (flue gas check) 12
3.5. Storing and printing results 13
3.6. NOx measurement (NOx standard) 15
4. Data processing
4.1. Data base / RAM 18
4.2. Working with chip cards 21
5. Instrument settings 24
6. Servicing 25
7. Technical data 27

ecom-JN Page 3
1. Introduction
The ecom-JN is a combination measurement instrument for analysing
flue gases and other combustion process parameters. The flue gas
analysis is carried out using electrochemical fuel cells. Flue gas
temperature, input air temperature, differential pressure, soot number
and any values calculated from these values such as flue gas losses,
efficiency and the excess air complete the list of results available and
form the necessary parameters for the classification of small heating
installation according to the 1st BImSchV.
The ecom-JN is the result of the many years of experience which
manyusershavehadwiththeecom-JandJ-Plusseriesandcombines
the highest possible safety requirements with user friendly operation
and technology using the best, most modern circuitry in a future
oriented design.
The following instructions describe the simple operation of the
instrument in the first, shorter section. This section should be read to
avoidmistakesandproblemswhenusingtheinstrument.The servicing
and maintenance information and the information on possible errors
should also be read. The second, somewhat longer section describes
the function of the processes used in the instrument and contains
details on technical data.
The instruction manual is set out to cover all possible options and so
includes the NOx and data processing modules.
Finally we would like to wish you every success in using the ecom-JN
in your every day work.

ecom-JNPage 4
2. Equipment
Probes
Pistol grip probe (standard):
- suitable for combined gas, flue gas losses,
draft measurement and soot measurement
- Depth 290 mm
- Diameter = 10 mm
- Coaxial form with Thermocouple NiCr/Ni
(T-Gasmax. = 500°C)
- Triple chamber tubing (3 m long)
- Heated soot measurement point
- Positioning cone
Multi hole probe (option):
- CO measurement of gas burners
- 3 meter tubing
Heated sampling system (option):
- Heated tubing (100 °C; 3.5 m long)
- Heated probe (100 °C) with 300 mm probe tubing
and integrated NiCr/Ni thermoelement (T-Gasmax. = 200°C)
- Hot gas filter
Sensors
T-room sensor (standard):
- Room temperature sensor with positioning
magnet (T-roommax. = 99°C)

ecom-JN Page 5
Standard fittings
- Soot number comparison scale
- Replacement filter
- Case carrying strap
- Operating instructions
- Data sheet
Optional extras
- RAM cards (standard 512 kB)
- Additional keyboard
- Matrix printer instead of thermal printer
- Peltier cooler instead of condensation trap
- Probe holder (movable)
- Undercase
- Extended sensor on request
Keyboard functions
Contrast
control
Display
light
CO-sensor
on/off
Draft meas.
<DRAFT>
Soot meas.
<SOOT>
Control
menu
<CTRL>
Memory
<m>
Cursor
down
Enter
<E>
Print
<PRINT>
Paper line
feed
Set menu
<SET> BImSchV
CO-meas.
<MODE>
Cursor
up Leave
menu
<ESC>
Zoom
<ZOOM>

ecom-JNPage 6
Accessories ecom-JN
NOx hose
(soot probe)
Item nr.:
10177 (3,5 m)
30001188 (5 m)
Data cable
Item nr.:
53532
without picture
NOx hose (probe without
soot measurement)
Item nr.:
30002193 (3,5 m)
30002213 (5 m)
Filtering case
(solid
combustibles)
Item nr.:
55810
T-room stick
Item nr.:
51446
Filtering plate
(solid combustibles)
Item nr.:
10137
Adapter cable USB / RS 232
Item nr.:
52162
without picture
Undercase
Item nr.:
52981
full height
53201
half height
Gas washing
bottle (only with
peltier cooler)
Item nr.:
5044043

ecom-JN Page 7
3. Flue gas measurement
3.1. Flue gas analysis
After selecting the appropriate probe for the measurement, this should
be attached to the measurement point and the temperature sensor for
the input air should be positioned. Care should be taken to ensure that
all tubing and connections between the probe and the instrument are
correct. If a mains supply (230 V/50 Hz) is available nearby (mains
cable is 5 m long) it should be used. The instrument can be powered
by the rechargeable batteries (when using a heated sampling system
mains supply must be used). If needed a tube should be connected to
the air input and an external air supply. A container for condensate
should be placed near the condensation pump outlet which is on the
lower right hand side of the instrument case.
Switch on the instrument.
Depending on the instrument version either a menu appears on the
display or, if there is no data processing software present, the 3 minute
calibration phase starts immediately.
To carry out a flue gas analysis, select Flue gas measurement with
the cursor and confirm by pressing <E>. The last selected fuel type will
now appear in the display. The fuel type can be selected using the
arrow keys to change the display to the fuel required and is selected
by pressing <E>.
Fuel type CO2max
Natural gas 11.8
Town gas 11.7
Coke gas 10.2
Liquid gas 14.0
Oil 15.4
Gas analysis
Data bank/RAM
Service card
select, <E> confirm!
select, <E> confirm!
Calibration phase 2:59 min
Natural gas
CO2max = 11,8 , A1 = 0,37 , B = 0,009

ecom-JNPage 8
If the optional data processing package has been installed, the user is
asked for using the data base function. If "YES" is selected the data
fieldtypecanbeselected.Seechapter "Data processing" for detailed
informations.
Once the 1-minute calibration phase is completed the instrument is
ready for measuring. The gas path inside the instrument is switched
from fresh air to GAS and after a pause of approx. 20 seconds (the
time for gas to reach the sensor) the complete measurement display
appears. The display can differ depending on the sensors included in
the instrument.
Instrumentswith the NOx module havea separate display for NO,NO2
and NOx.
The <ZOOM> key can double the display size, i.e. after pressing once
the display changes from 8 lines to 4 lines.
The arrow keys can be used to alter the last two lines in the enlarged
display (in this case CO and Losses). The upper lines can be changed
by pressing the <ZOOM> key again, switching to a two line display.
The last setting chosen remains so that the important values can be
set in the display.
rbr-ecom JN 10.09.94 12:34
O2 17,5 % Exc.air 1,15
CO2 10,1 % T.gas 140 °C
CO 145 ppm T.air 24 °C
NO 38 ppm Draft -0,05 hPa
Eta 92,3 % Dew p. 49 °C
Losses 7,3 % +
O2 17,5 %
CO2 10,1 %
CO 145 ppm
Losses 7,3 %
O2 17,5 %
CO2 10,1 %

ecom-JN Page 9
Please note:
1.) The measurement must be carried out in the gas stream centre.
The gas stream centre is where T gas is at a maximum which can
easily be found using the trend display.As long as a "+" sign is visible
in the display the temperature being measured is rising, i.e. the probe
is moving towards the centre of the main gas stream. A - sign means
that the probe is being moved away from the gas stream centre and
thetemperatureis dropping. The display is deleted if no changeoccurs
for 3 seconds or more.
2.) Correct measurements appear in the display after a short delay
due to the time taken for the gas to reach the sensors and the time
takenfortheelectrochemicalsensorstoreachastablesignal(between
1 and 1.5 minutes). Measurements should not be saved, noted or ac-
cepted until the values are stabilised. If the values still vary by more
than 2 ppm this could be due to an unstable draft behaviour in the flue
gas which gives rise to a variable gas stream centre. This can be
confirmed by checking the draft value in the display. If this value varies
strongly or is considerably higher than 0.20 hPa this can effect the
measurement.
3.) The values for CO2, Eta, Losses, Exc.air and Dew point are
calculated. They can only be calculated correctly when realistic values
for O2and temperature are available. Care must be taken to ensure
that:
O2< 20.5% and
T gas - T air > +5°C
Thedewpoint can only becalculatedaccurately if the currentbarometric
pressure was entered under <SET>. If the gas temperature falls below
the dewpoint (between 25 and 65 °C), ETA will be calculated with
condensation. In the display (C) appears behind ETA.
Once the measurements are stable and reliable press <m> to store
the values in the memory. They can be stored here for printing out at a
later stage.

ecom-JNPage 10
3.2. Draft measurement
The draft present in the flue gas channel has already been indicated
by the trend display earlier. The chimney draft value is not stored by
pressing <m> as the differential pressure sensor is very sensitive and
drifts. For this reason it is recommended to re-calibrat the sensor
immediately before a measurement to ensure a good accuracy.
Adifferential pressure measurement is started by pressing <DRAFT>.
The current value is displayed as well as a reminder to reset zero
point. Remove the draft tubing and press the <MODE> key. The sen-
sor will now be re-calibrated.
Fix the tubing. The display now shows the exact value which can
saved value : -0.08 hPa
be stored by pressing <m>. This value will be added to those already
stored. The value saved is displayed. To leave the draft measurement
press <ESC>.
Draft measurement
Draft - 0,05hPa
Reset zero point : release draft
hose, then press <MODE> !

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
Switchontheheatingforthesamplingprobebypressing<SET>,move
thecursor to “Probe heating NO” andpress<E> to change itto"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:

ecom-JNPage 12
Manual soot measurement and entering the values
If the soot measurement is carried out manually using a hand held
soot pump to reduce the load on the sensors, the results can be stored
in the instruments memory. The soot measurements are added to the
printer report and to the data for the measurement. Press <SOOT>
and then <MODE>. Enter the smoke number (decimal point using the
arrowkey)andconfirm with <E>. Repeat twice more and then continue
as described above. The values are stored automatically.
3.4. CO measurement (flue gas check)
When testing the safety of a gas-fired incinerator a flue gas path test,
often called a CO measurement is carried out. The CO content of the
flue gas is measured after the flow restriction and the undiluted value
(0% oxygen remaining in the flue gas) is calculated. The flow of flue
gasafter the flow restriction is no longer homogenous due to secondary
air flow and so the main stream measurement will contain errors. The
analysis of the gas therefore is carried out using a multi-hole probe
(optional extra). Align the holes of the multi-hole probe against the flow
direction in the gas stream.
Press the <MODE> key and the 4 values required for a CO measure-
ment are shown in the display. The value shown after CO(U) is the
calculated CO content assuming the oxygen content is 0%, the undi-
luted CO concentration in the flue gas.
Once the display is stable press the <m> key to store the value. Press
<MODE> to return to the standard flue gas measurement mode.
O2 17,5 %
CO (U) 738 ppm
CO 123 ppm
Exc. air 1,03

ecom-JN Page 13
3.5. Storing and printing results
The rbr-ecom JN has a 58 mm thermal printer for printing reports
(optional matrix printer). The printed report can be used as a copy of
the work carried out for the customer or as an archive copy of the
measurements.
Areport is printed by pressing <PRINT> and contains only those values
stored in the memory at that time. A described earlier, the individual
measurements are stored by pressing <m> (the soot measurement is
stored automatically). Once <PRINT> has been pressed the stored
values can be checked.
The report is printed by selecting “Start print” and is structured as
follows :
Customers name and address form the data
base (only appears if the relevant options
have been selected or installed)
text (2 lines each 20 characters long)
comments, notes, information...
date and time of report
result from flue check
flue gas analysis results according
to BImSchV
NO, NO2, NOx only shown if option installed
Differential pressure measurement
soot measurement results
8lines of text (max. 20 characters) which can
be programmed according to the customers
requirements either before delivery or by a
service check (e.g. firm address)
ecom-JN
name 1
name 2
line 1
line 2
Date Time
12.09.94 12:34:56
CO-measurement
O2 17,5 %
CO (U) 738 ppm
CO 123 ppm
Lambd. 1,15
BImSchV
Fuel type
Heating oil
T air 22 °C
T gas 140 °C
O2 13,2 %
CO 85 ppm
NO 43 ppm
NO2 5 ppm
NOx 48 ppm
Draft -0,05 hPa
Smoke no. 1,2 1,3 1,4
Oil derivative No
max. 8 lines of 20
characters
(name, adress, telephon,
text,...)

ecom-JNPage 14
Text input lines 1 and 2
In certain cases it can be useful to include additional comments in the
report (notes, comments, observations, etc.). This can be achieved by
selecting “Text input” with the cursor and pressing <E> :
Two lines each 20 characters in length are available for inputting any
information required. An external keyboard is available as part of the
data processing package, without this keyboard only numeric data can
be entered using the internal keyboard.
Whilst the report is being collated and printed, all other functions are
inoperative.
Note:
The memory contents can be deleted by pressing <m> in the
appropriate mode (BImSchV measurement, CO measurement or draft
measurement). The "m" in the display disappears and the values in
the memory are deleted without being over written with by any current
results. To store the current values , the <m> key must be pressed
again and the "m" appears in the top right hand corner of the display
again.
Insert text
•
•
Cancel with <ESC> ! delete with <F2> !

ecom-JN Page 15
3.6. NOx measurement (NOx standard)
The ecom-JN can be equipped with a complete NOx module which
comprises:
- NO sensor
- NO2sensor
- Peltier cooled gas heat exchanger
- Heated sampling system (3.5 m long)
The instrument can also be equipped with only one sensor for
measuring the NO concentration although no NOx calculation can be
made in this case.
NOx is made up of the sum of the NO and NO2concentrations in the
flue gas which depend on the fuel and the combustion process. Legal
limits and recommendation always refer to the sum of nitrogen oxides
(NOx).
Under normal conditions NO2is very reactive and will be washed out
by condensation to form nitric acid (HNO3). For this reason the gas
path from the measurement point to the instrument must be kept
condensation free to avoid washing out of NO2.
Theheated sampling system heats theheadofthe probe and the tubing
toatemperature(standard 100°C) above the water condensation point
(this is normally between 45 and 60°C) and so prevents condensation
forming. The peltier cooled gas heat exchanger shock cools the gas
down to a temperature of between 5 and 8°C. This causes excess
water and water vapour which can no longer be kept in the gas at this
temperature to condense out. The condensation is collected in a
container underneath the cooler and can be removed by pumping out
either as required or automatically when the instrument is switched off.

ecom-JNPage 16
The gas is in the tubing for such a short time and is unable to react or
cool down any further on its way to the sensors so no further
condensation occurs.
The nitrogen oxides are measured separately using two sensors. Both
values are displayed and dealt with separately. Their sum is calculated
according to the conditions set :
NOx in ppm
NOx (ppm) = NO (ppm) + NO2 (ppm)
NOx in mg/m3
NOx (mg/m3) = (NO (ppm) + NO2 (ppm)) * 2.056
NOx in mg/kWh
Calculated from tables according to TA-Luft and
the fuel type.
The conversion factors for the individual gases are in the appendices.
Please note the following when measuring nitrogen oxides:
1.) Use the heated sampling system. Measurement carried out using
the normal sampling system without the gas cooler can have an error
due to up to 40% of the NO2concentration being washed out.
2.) The heated sampling system can only be used with a mains power
supply. The power consumption is approx. 400 W.
3.) The set temperature is reached after approx. 5 minutes and is then
controlled by the programme.
4.) Be sure to connect the condensation tubing when using the heated
samplingsystem and gas cooler toavoidproblemsdue to condensation
being pumped off.

ecom-JN Page 17
4. Data processing
The ecom-JN data processing package consists of :
- RAM card slot
- Extended software
- External keyboard
- Centronics parallel port
- Optional: RAM cards in different sizes (standard 512 kB)
The extended software enables additional functions for storing and
administratingmeasurement resultsaswell as longtermmeasurements
with data logging.
Data processing consists of two different methods:
1.) Processing of individual measurements and installation data. This
data can be stored on an external data carrier for processing at a later
stage. The data is stored in a standard format compatible with PC data
formatsand existingsoftware(e.g. regional administrationprogrammes,
data bases).
2).Processing of long term measurementdatawithautomatic recording
(data logger). The instrument records all measurement data over a
time period at programmable intervals or sends them via the serial and
parallel ports to a PC or printer. The preferred data carrier is again the
RAM card (if a PC is connected the data can be written directly to the
hard disk).
The data processing functions (other than those connected with
recording measurement data) can be used when the instrument is not
measuring. The pump and the sensors remain switched off and no
calibration is carried out when the instrument is switched on.

ecom-JNPage 18
4.1 Data base / RAM
The JN uses RAM cards as storage medium for large amounts of data.
RAM cards with capacities up to 4 MB (4096 kB) can be used. As a
disks, a RAM card must be formatted before it can be used. The
formatting procedure deletes all of the data previously stored on the
cardandisirreversible.Approx.1kBis reserved on the card for system
information.
RAM cards are formatted by choosing the option “RAM card” from
the menu.
A list of further options appears along with information on the RAM
card.
Select “Format” and after the warning message has been confirmed
the RAM card is formatted. Once the formatting is finished the main
menu reappears.
Note : The standard setting for RAM cards is 512 kB, if RAM cards of
different capacity are used this must be set under “Configurate” as
otherwise the card will be incorrectly formatted.
The RAM cards can be used for storage and for data base functions.
With the data base function, data is loaded from a PC (e.g. installation
data, customer data) and the measurements are added later in situ.
Once the measurements are completed, the data can be transfered
back to the PC in the correct form and under the correct area. To do
this an area of the RAM card must be reserved.
Select
Visualize/Print
Communication
RAM card
Format
Cancel files
Configurate
Capacity 512 kB General Data 0
Reserved 250 kB Free 261 kB

ecom-JN Page 19
The rest of the card can be used for other measurement data which
does not need to be stored under a specific installation, e.g. when
using the data logger function. Select “Configurate” from the menu.
Two lines appear in the display:
- Total 512 kB
- Reserved 256 kB
“Total” determines the total capacity of the RAM card. If this is different
from 512 kB press <E> to set the correct capacity. The values shown
are those for acceptable RAM cards. The reserved area is set similarly
by moving thecursor to “Reserved” andpressing <E> until the desired
value is reached. The reserved value is increased in steps of 64 kB.
Once the settings are correct press <ESC> to leave this menu.
“Cancel files” does not need much explaining. After the warning has
been answered with “YES”, all files on the card are deleted.
Warning: Due to the read / write mechanism used with RAM cards
accidentally deleted files cannot be recovered. The delete and format
functions should therefore only be used after the data on the card has
been copied onto a PC.
Communication
Once the RAM card has be prepared it can be used. The option
“Communication” accesses the functions load data base, send data
baseand general datatransfer.The optionsareselectedwiththe cursor
and <E>.
Load data bank
Data is transferred from the PC via the RS 232 port from a particular
programme (e.g. the regional administration software). To do this the
RS 232 port on the ecom-JN is connected to the serial port on the PC.
C o m m u n i c a t i o n
Load data bank
Send data bank
Send general data

ecom-JNPage 20
Datais transmitted according totheinstructions given in theprogramme
on the PC. The data transfer must also be confirmed on the JN before
transferring. The reserved area on the card is formatted differently in a
few seconds (progress is shown on the display). The JN is then ready
to accept data from the PC.
The functions “Select” and “View / Print” are now available.
The “office work” with the JN is now finished and the JN can now be
used for actual measurements. The decisions whether to use a data
base and which storage medium to use are made after switching on
the instrument. The settings for storing general data on RAM cards are
found under "Set menu" (<SET>, function “times” and “data logger
: YES”).
Send data bank
Connect the JN and the PC via their RS 232 ports and start the
programmeandfollowtheinstructions. Chose the function “Send data
bank” on the JN and press <E>.
Thedata willbesent to thePC.The data baseonthe RAMcardcontains
information about changes made which means that only data corre-
sponding to actual measurements are transferred.
If there is general data in the reserved area on the RAM card which is
to be transferred to the PC (e.g. measurements from the data logger)
the RAM card data programme should be used. Connect the PC and
JNvia the RS232port. Start the programmeonthe PC. Settherequired
options on the PC and press ENTER. On the JN select the function
“Send general data” and press <E>.
C o m m u n i c a t i o n
Load data bank
Send data bank
Send general data