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> !
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