Eclipse EGA4 User Manual

Instruction Manual 924-2

4/24/07

Eclipse EGA4 Combustion

Analyzer

Instruction Manual MM850481 ed. 03a

INTRODUCTORY NOTE

N

OTE:THIS MANUAL IS VALID FOR INSTRUMENTS WITH SERIAL NUMBER 124012 AND FIRMWARE REV.1.XX2 OR HIGHER

This manual has all the information you need to install, operate and maintain the flue gas analyzers EGA4 and
its accessories.

Eclipse has used the best care and efforts in preparing this book and believes the information in this publication
are accurate. The Eclipse products are subjected to continuous improvements, in order to pursue the
technological leadership; these improvements could require changes to the information of this book.
Eclipse reserves the right to change such information without notice.

The EGA4 gas analyzers uses sophisticated analog and digital technologies. Any maintenance operation must
be carried out by qualified personnel
operation on the instrument. We recommend to contact our technicians for any support requirements.
The instrument is supplied by a Ni-MH rechargeable battery pack or by 100, 115, 230V
supply using the special power supply module provided with the instrument.

Eclipse shall not be liable in any event, technical and publishing error or omissions, for any incidental and
consequential damages, in connection with, or arising out of the use of this book.

The operator must not use this equipment for any other purpose than that stated.
This document is the property of Eclipse and may not be copied or otherwise reproduced, communicated in
anyway to third parties, not stored in any Data Processing System without the express written authority of

Eclipse.

ONLY. Eclipse supplies instructions and operative procedures for any

r

10% 50/60Hz line

2

Instruction Manual MM850481 ed. 03a

TABLE OF CONTENTS

1 GENERAL DESCRIPTION .........................................................................................................................5

1.1 Ordering code ..............................................................................................................................................................6

1.2 Specifications...............................................................................................................................................................7

1.3 Accuracies and ranges ................................................................................................................................................8

2 GENERAL ...................................................................................................................................................9

2.1 Keypad & Display.........................................................................................................................................................9

2.2 Built-in printer...............................................................................................................................................................9

2.3 Gas sampling probe.....................................................................................................................................................9

2.4 Measuring sensors.......................................................................................................................................................9

2.5 Temperature probes ....................................................................................................................................................9

2.6 Pressure sensor...........................................................................................................................................................9

2.7 Fuel technical data.......................................................................................................................................................9

2.8 Smoke measurement.................................................................................................................................................10

2.9 Remote temperature probe........................................................................................................................................10

2.10 Ambient CO probe ................................................................................................................................................10

2.11 Natural gas probe..................................................................................................................................................10

2.12 Leak test procedure ..............................................................................................................................................10

2.13 Burner pressure probe ..........................................................................................................................................10

2.14 Pitot tube...............................................................................................................................................................10

2.15 CO Dilution............................................................................................................................................................10

2.16 Calibration certificate.............................................................................................................................................10

3 PHYSICAL DESCRIPTION.......................................................................................................................11

4 PRINCIPLE OF OPERATION ...................................................................................................................12

4.1 Measurement principle...............................................................................................................................................12

4.1.1 Gas sampling probe ..............................................................................................................................................13

4.1.2 Water trap & line filter............................................................................................................................................13

4.1.3 Gas sensors..........................................................................................................................................................13

4.2 Auxiliary measurements.............................................................................................................................................14

4.2.1 Temperature measurements.................................................................................................................................14

4.2.2 Pressure and Draft ................................................................................................................................................14

4.2.3 Smoke index measurement ..................................................................................................................................15

4.2.3.1 Measuring instruments (option)........................................................................................................................15

4.2.4 Other measurements ............................................................................................................................................15

5 RECOMMENDATIONS .............................................................................................................................16

5.1 Power supply .............................................................................................................................................................16

6 CONNECTIONS ........................................................................................................................................17

6.1 Electro-pneumatic connections..................................................................................................................................17

6.2 Gas probe positioning................................................................................................................................................17

6.3 Connecting to a PC....................................................................................................................................................18

6.3.1 USB installation.....................................................................................................................................................18

6.3.1.1 Installing the USB driver...................................................................................................................................19

7 OPERATIONS ...........................................................................................................................................21

7.1 Basic operation ..........................................................................................................................................................21

7.1.1 Keyboard...............................................................................................................................................................21

7.1.2 Display ..................................................................................................................................................................21

7.1.3 Display adjustment................................................................................................................................................22

7.1.4 Numerical input .....................................................................................................................................................22

7.1.4 Text input ..............................................................................................................................................................23

7.1.5 Select by a list .......................................................................................................................................................23

7.2 Flue gas analysis .......................................................................................................................................................24

7.3 Pressure/Draft measurement.....................................................................................................................................26

7.3.1 Burner pressure measurement..............................................................................................................................27

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Instruction Manual MM850481 ed. 03a

7.4 Smoke measurement.................................................................................................................................................27

7.4.1 Smoke index data input.........................................................................................................................................27

7.5 Combustion air temperature (option) .........................................................................................................................27

7.6 Flow/Return temperature measurement ....................................................................................................................28

7.7 Gas velocity measurement ........................................................................................................................................28

7.8 Analysis data print......................................................................................................................................................30

7.8.1 Paper and Ribbon change ....................................................................................................................................30

7.9 Pressure decay procedure (option)............................................................................................................................31

7.9.1 Test A (1 minute)...................................................................................................................................................31

7.9.2 Test B (programmable) .........................................................................................................................................33

7.10 Ambient CO probe (option) ...................................................................................................................................35

7.10.1 CO probe operations.............................................................................................................................................35

7.11 Natural gas leak external probe (option) ...............................................................................................................36

8 MEMORY MANAGEMENT .......................................................................................................................38

8.1 Store data analysis ....................................................................................................................................................38

8.2 Tag selection .............................................................................................................................................................38

8.3 Delete memory...........................................................................................................................................................39

8.4 Recall memory...........................................................................................................................................................39

8.5 DBGas 2004 ..............................................................................................................................................................40

8.5.1 Installing DbGas 2004...........................................................................................................................................40

8.5.2 Registering the Software.......................................................................................................................................41

8.5 GasConfig..................................................................................................................................................................41

8.5.1 GasConfig Installation ...........................................................................................................................................42

8.5.2 How to operate using GasConfig ..........................................................................................................................42

8.5.3 Transfer configuration to PC .................................................................................................................................44

8.5.4 Transfer configuration to the Analyzer ..................................................................................................................44

9 CONFIGURATION ....................................................................................................................................45

9.1 Engineering Units.......................................................................................................................................................45

9.2 Alarms........................................................................................................................................................................46

9.3 HELP key...................................................................................................................................................................46

9.3.1 Header setting.......................................................................................................................................................46

9.3.2 Sensor Diagnostic .................................................................................................................................................47

9.3.3 Service Data..........................................................................................................................................................47

10 MAINTENANCE ........................................................................................................................................48

10.1 Water trap .............................................................................................................................................................48

10.2 Error messages.....................................................................................................................................................49

10.3 Set-up menu..........................................................................................................................................................49

10.3.1 Clock.....................................................................................................................................................................50

10.3.2 Serial Port .............................................................................................................................................................51

10.3.3 Analysis parameters..............................................................................................................................................51

10.3.4 P decay time .........................................................................................................................................................51

10.4 Firmware Upgrade ................................................................................................................................................52

10.5 Smoke pump maintenance ...................................................................................................................................52

11 CERTIFICATES.........................................................................................................................................53

11.1 Warranty terms......................................................................................................................................................53

11.2 Letter of conformity ...............................................................................................................................................53

APPENDIX .............................................................................................................................................................54

A1 Example.....................................................................................................................................................................54

4

Instruction Manual MM850481 ed. 03a

1 GENERAL DESCRIPTION

EGA4 is designed to satisfy the market needs; but they are the result of the advanced research and experience of Eclipse.
EGA4 is a multigas compact palm-top multifunction instrument. The micro-processor based instrument includes a flue gas

analyzer, an emissions monitor and an ambient parameters indicator. Two internal electrochemical sensors read the Oxygen

) and carbonic monoxide (CO) gas concentration. The gas temperature and air temperature are used in connection with

(O

2

the gas analysis to calculate the efficiency, excess air, and CO
used for calculations approved in accordance with DIN33962.
A third cell (NO or SO

) enables the pollution measurement. The NO concentration can be expressed in terms of NOx as

2

required by ambient laws.
External sensors are available for ambient parameters measurement: ambient CO, to check and evaluate gas network
leakage and natural gas leakage detector.

concentration. A 10 gas parameters programmable table is

2

EGA4 can install a forth electrochemical sensor to monitor pollution. In this way you can measure simultaneously and using a
single unit, NO/NOx and SO

gas concentration.

2

The instruments are completed with a pressure (draught) sensor, an internal printer, an internal memory for storing data and
a RS232 serial interface for configuration and data transfer from and to a PC.

i Draft measurement is possible using the internal pressure sensor and the special gas sample probe.
i The optional internal printer is impact type and the generated document is very legible and has a long time duration.
i The internal standard memory may store up to 250 complete gas analysis divided by Tag.
i The instruments have a standard USB serial interface and a configuration PC software are available to configure the

analyzer.

Features & Benefits

 New user friendly interface: very intuitive and in English

language to use the instrument without instruction manual.

 Large dimensions and lighting LCD display: very legible

using the “Zoom” function and the automatic back-light device.

 Easy and quick upgrading hardware and software are made

using modular design to upgrade the system yourself.

 Differential pressure measurement: gas velocity, pressure,

draft, 'P, etc.

 Averaging between three gas analysis.
 Internal impact type printer: more legible and long time

duration for you documents.

 Single battery pack: rechargeable to power both the

instrument and the printer.

 Internal memory: up to 250 complete data analysis and USB

port

THE INSTRUMENT IS FULLY EN 50379 PART 2 AND PART 3 COMPLIANT

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Instruction Manual MM850481 ed. 03a

1.1 Ordering code

7826 – A – B – CC – D – EEE – F – GGG – H

Each EGA4 is equipped with a O2 sensor, internal 250 memory, realtime clock capabilities, USB serial cable, electrovalve for autozero quick
start-up, magnetic rubber holster, rechargeable battery pack, battery charger and supplied with a Report of Calibration and an instruction
manual.

Table A Sensor n.1

1 O2 (0-25%)

Table B Sensor n.2

0 none
2 CO (0-8000 ppm) H
2L CO (0-500 ppm)
2X CO (0-20000 ppm) + CO sensor exclusion
2Y CO (0-10.00 %)

Table C Sensor n.3 & 4

0 none
4 NO/NOx (0-4000 ppm)
4LO NO/NOx (0-500 ppm)
5 NO
5LO NO
6 SO
8 CxHy (0-5.00%)

(0-1000 ppm)

2

(0-500 ppm)

2

(0-4000 ppm)

2

Table D Gas sampling probe (air filter and water trap included)

0 none
2 Standard (l=300 mm) max 800°C + Draft (dual hose) (cat. BB610046) max 500°C
5D Standard (l=750 mm) max 800°C + Draft (dual hose) (cat. BB610080) max 500°C
5X Standard (l=750 mm) max 800°C + Draft (single hose) (cat. BB610050) max 1000°C

8 Standard (l=750 mm) max 800°C + Draft (single hose) (cat. BB610082) max 1200°C without TC

F Sinterized filter (max.800°C)

compensated + CO sensor exclusion

2

Table E Options

0 none
1 Internal impact printer
2H Draft and differential pressure measurements capability + dual hoses with connector
4 Graphic display capability
6 Electrovalve for autozero quick start-up
8 Internal sensor for gas leak detector

Table F Battery charger

1 115 Vac with USA plug
2 230 Vac with Schuko plug
3 230 Vac with UK plug
4 230 Vac with European plug
5 100 Vac with USA/Japan plug

Table G Accessories

0 None
1 Data Manager Software Package DBGas 2004 standard (cat. EE260166)
3V Vinyl Carrying case with shoulder strap (instrument + gas probe + accessories) (cat. BB830043)
3 ABS Carrying case (instrument + gas probe + accessories) (cat. BB830028)
4 Aluminium carrying case (instrument + gas probe + accessories) (cat. BB830033)
5 Remote air sensor with 2 meters cable length (cat. BB830018)

8 External Ambient CO probe (cat. BB830009)

9 External probe for gas leak test (sniffer)
B External Manual pump for smoke measurement with filters and comparing table
D External probe for ionization current measurements (cat. BB830019)
E Pitot tube BB610032 (only with option E=2H)
G 12 Vdc auto battery charger (cat. BB290032)

Table H Calibration certificate

1 Eurotron report

6

Instruction Manual MM850481 ed. 03a

1.2 Specifications

 Type: 2, 3 or 4 cells palm-top flue gas analyzer/Boiler tuning unit.
 Calibration: automatic 60 seconds calibration procedure at instrument switching-on. Optional autozero electrovalve for

quick start-up.

 Self-diagnosis: Sensors efficiency test with anomalous status announcement.
 Fuel types: Up to 10 totally programmable.
 Pump: rate of flow 0.8 lit / head –230mbar

All data measured using 3 meters long probe and line filter connected. Load loss = 10 mbar using a 3 meters probe
extension

 Power supply: High capacity Li-Ion rechargeable battery pack / external battery charger.
 Charging time : 3h at 90% with instrument off.
 Battery life: 10h continuous operation (without printer and back-light).
 Printer: Impact type 24 columns with 58 mm large and 18 meters long paper roll
 Printer power supply: using the analyzer battery pack.
 Automatic CO(ppm) dilution: Automatic sensor protection from high CO concentration
 Internal data memory: up to 250 complete analysis data structured by Tags.
 Service and user data: 3 programmable lines for each programmed customer using a PC and DBGas Software.
 Report Herder: 4 rows x 16 characters programmable from keyboard
 Display: Large (40x56 mm) graphic LCD display with automatic back-light device. Bargraph and trend capability as

option.

 Serial interface: USB standard interface
 Smoke measurement: Using the optional external manual pump. Bacharach index memory store and printout capability

as standard.

 Optional probes: ambient CO, explosive gas leakage sniffer.
 Working temperature: from –5°C to +45 °C (up to 50°C for short time)
 Storage temperature: from –20 to +50°C (3 months maximum at temperatures exceeding the operational limits).
 Dimensions: 115x90x330 mm
 Weight: 1.1 kg battery and printer included

External Probes

Ambient CO probe

 Range: from 0 to 500ppm
 Accuracy: r5ppm up to 100ppm; r5% up to 500ppm
 Resolution: 1ppm
 Response time: 30s (t90)
 Waiting starting time: 30s
 Working temperature: from –5°C to +45 °C

Natural gas leak detection probe

 Pre-heating time: 30s minimum
 Alarms indication: visual with 5 steps
 5 alarms levels: 100, 200, 300, 400, 500 ppm
 Acoustic Alarm indication: respectively 1, 2, 3, 5 bip/s,

continuous

 Response time: 5s (t90)
 Alarm levels Accuracy: r10% at 90 days

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Instruction Manual MM850481 ed. 03a

Low Draft Probe

x Range: r200Pa
x Resolution: 0.1Pa
x Operative temperature range: from +5 to +45 °C
x Accuracy

 From +10 Pa to -10 Pa: r0.5 Pa
 Elsewere: r3 Pa

1.3 Accuracies and ranges

Parameter Sensor type Range Resol.

O

2

Electrochemical from 0 to 25.0% 0.1% 20 sec.

CO

H

compensated Electrochemical from 0 to 8000 ppm 1 ppm 50 sec.

2

CO diluted

Electrochemical from 0.8 to 10% 0.05%

Max

response

Accuracy

r0.1% vol.

r10 ppm <300 ppm

r4% rdg up to 2000 ppm

r10% rdg elsewere

r10 ppm <300 ppm

CO

CO%

NO

NO LOW

NO

2

NO2LOW

NO

x

SO

2

CO

2

Tair

Tgas

'T

Tflow

Treturn

Pressure 'P

Draft

Excess air

Electrochemical from 0 to 20000 ppm 1 ppm 40 sec.

Electrochemical From 0 to 10.00% 0.01% 50 sec.

Electrochemical from 0 to 4000 ppm 1 ppm 40 sec.

Electrochemical From 0 to 500 ppm 0.1 ppm 40 sec.

Electrochemical from 0 to 1000 ppm 1 ppm 50 sec.

Electrochemical from 0 to 500 ppm 0.1 ppm

40 sec.

Calculated from 0 to 5000 ppm 1 ppm

Electrochemical from 0 to 4000 ppm 1 ppm 40 sec.

Calculated from 0 to 99.9% 0.1 %

Pt100 from -10 to 100 °C 0.1 °C

Tc K from -10 to 1000 °C 0.1 °C

Calculated from 0 to 1000 °C 0.1 °C

Tc K from -10 to 100 °C 0.1 °C
Tc K from -10 to 100 °C 0.1 °C

Piezo from 0 to 200 hPa 0.1 hPa

Piezo ±40 Pa 0.01 hPa

Calculated from 1.00 to infinity 0.01

r4% rdg up to 2000 ppm

r10% rdg elsewere

r0.01% up to 0.2%

r4% rdg elsewere
r5 ppm <125 ppm
r4% rdg elsewere

r2 ppm <40 ppm
r5% rdg elsewere
r5 ppm <125 ppm
r4% rdg elsewere

r2 ppm <40 ppm
r5% rdg elsewere

r5 ppm <125 ppm
r4% rdg elsewere

r(0.2% rdg+0.15°C)

r(0.3% rdg+0.3°C)

r(0.3%rdg+0.3°C)

r(0.3% rdg+0.3°C)

r0.5 Pa up to 50 Pa

±1% rdg elsewere

r0.03 Pa up to 300 Pa

±1% rdg elsewere

from 0 to 99.9%

Efficiency

Calculated

(also for condensating

boilers with automatic

0.1 %

detection)

Gas speed

Smoke index

Pitot tube From 0 to 100.0 m/s

External pump from 0 to 9

0.1 m/s

 Technical units and ranges can be converted directly from ppm to mg/Nm3 , mg/kwh and from hPa to mmH2O, mbar or inH2O.
 The relative accuracy shown are expressed as absolute or % of rdg errors at -5°C to +40°C ambient temperature.
 The maximum response time shown is referred to 90% signal changes.
 The pressure relative accuracy shown is valid only after the auto-zero procedure.

Specifications may change without notice.

8

Instruction Manual MM850481 ed. 03a

2 GENERAL

2.1 Keypad & Display

The tactile keyboard allows the operator to enter the main operative mode and all other complementary or auxiliary modes
following the menu driven instructions.
The high contrast graphic LCD (40x56 mm), equipped with an automatic back-light device, displays the measured and/or
calculated parameters in the preferred format (Zoom function). The above parameters can be also displayed in a graphic
mode.

2.2 Built-in printer

EGA4 can be equipped with a built-in, rugged, impact type printer. It uses a low cost common roll of paper (58 mm large, 18

meters long) , more readable, long time and heat resistant better than the thermal printout on chemical paper. One key
instruction is enough to obtain one, two or more copies of the analysis report with header and company reference data.

2.3 Gas sampling probe

Flue gas sampling probes with different length, shape and max. operating are available to match the requirement of different
applications. The sampling probe is connected to the instrument with a rubber hose through a combined module of water trap
and suspended particle filter.

2.4 Measuring sensors

EGA4 uses long life sensors for O2, CO (H2 compensated), NO, NO2 and SO2. An automatic internal device diluted the CO

concentration when a high level of CO is identified by the instrument. Dilution system allows to extend the measuring range
of the CO sensor up to 10%.
The optional Autozero valve for quick start-up allows the operator to switch the instrument with the gas probe in the stack.
Four acoustic and visual alarms can be set on four programmable parameters.

2.5 Temperature probes

A thermocouple type K is incorporated on the tip of the gas sampling probe to measure the flue gas temperature. This
thermocouple is suitable for measurements up to 800°C (max 1000°C for few seconds). Temperature measurement and gas
sampling from the flue gas pipe are thus always performed in the same site.
The probe is connected to the instrument with the appropriate compensated cable and connector. A Pt100 resistance
thermometer (local jig or remote sensor) is used for the air temperature measurement and best efficiency calculation.

2.6 Pressure sensor

The instrument is equipped with an internal sensor for pressure and stack draught. One key instruction move the operative
mode to and from this function to gas analysis and viceversa. The instrument has, as standard feature, a differential pressure
sensor.

2.7 Fuel technical data

The instrument includes as standard the technical data for 4 of the most common fuels.
Using the optional GasConfig software, it is possible to modify or add data of up to 10 different fuels.

9

Instruction Manual MM850481 ed. 03a

2.8 Smoke measurement

Smoke index measurement is done by using a hand pump (supplied as an accessory), the results cam be memory stored
and printed in the report.

2.9 Remote temperature probe

A remote Pt100 probe is available for combustion air temperature measurement from –10°C to 100°C. This probe is strongly
recommended mainly in forced air boiler to obtain an accurate calculation of the efficiency.

2.10 Ambient CO probe

Optional probe to monitor CO concentration and therefore safety condition in the boiler room. The instrument gives acoustic
and visual alarm if the set limit (according to the OSHA recommendation) are exceeded.

2.11 Natural gas probe

Optional probe to monitor CH4 and natural gas concentration and detect and locate the position of a gas leak into the
domestic pipe network.

2.12 Leak test procedure

To check gas network tightness using a pressure decay method at programmable interval time. It uses the internal pressure
sensor and a Eclipse leakage procedure.

2.13 Burner pressure probe

A 1 meter 8x4mm silicon hose (cat. EE300088) is used to check the pressure inside the burner when you are installing the
heating system.

2.14 Pitot tube

The EGA4 analyzer can be connected to a Pitot tube for gas speed measurements.

2.15 CO Dilution

This feature helps you to measuring high concentrations of the CO gas and to protect the CO sensor, even for highly polluted
environmental. The process dilute the CO concentration that goes on the CO sensor with fresh air, breathed in by a little
built-in pump. (see par. 7.2)

2.16 Calibration certificate

Each EGA4 portable gas analyzer, is factory calibrated and certified against Eclipse Standards, that are periodically certified
by an International recognized Laboratory, and shipped with a Report of Calibration stating the nominal and actual values
and the deviation errors.

10

Instruction Manual MM850481 ed. 03a

y

3 PHYSICAL DESCRIPTION

The EGA4 portable analyzer consists of a rugged and compact case, a mother board with all base function circuits, 2, 3 or 4
electrochemical cells, a gas pump, a keyboard, an LCD backlighted display, a Li-Ion rechargeable battery pack and,
optionally an impact printer.
The 2 pieces of the case are jointed by 8 screws. The batteries, the pneumatic circuit and the cells are positioned in the rear
of the analyzer and 2 screws locked the lid.
A pressure lid allows to remove the paper roll.

Positioning cone

Impact printer

(opt.)

Graphic Displa

Keyboard

Flue gas probe

External probe and
Pt100 Tair probe input

Battery charger

USB port

Back-light sensor

P1 – Draft/Pressure

INLET – Flue Gas

At the bottom of EGA4 you can see all sampling probe connectors: gas inlet, pressure and draught input, thermocouple input
for gas measurement and the 2

input

input

nd

pressure inlet connector.

P2 - 'P Input

Tgas Input

Water trap + Line filter

On the right side are the connectors for: USB port, line power charger and the input for the auxiliary probes.

The operator interface is on the front of the instrument and it consists of: a high contrast LCD display and a 14 button
keypad. An automatic back-light device and a “zoom” function, make easier the data reading on the display. The most used
operation (analysis, draught, printing and smoke index) can be accessed by operator pressing a single key.

11

Instruction Manual MM850481 ed. 03a

t

t

4 PRINCIPLE OF OPERATION

The EGA4 analyzer is based on the following functional blocks:

2° Sensor CO

Water trap

Line filter

Gas inpu

INLET

P2 - 'P

P1 – Draft/Pressure

TcK Tgas inpu

Differential

pressure

sensor

Display

Keyboard

Pump 1° Sensoe O2

MicroController

Impact printer

250

memory

4° Sensor

3° Sensor

Power supply

Li-Ion battery

Gas outlet

Pt100 Tair input

External probe inp ut

IR serial port

Battery charger input

4.1 Measurement principle

The gas is sampled and aspirated through the probe with a primary pump powered at constant voltage.
To position the sampling probe in the exhaust gas pathway a hole of 11mm, up to 16mm, should be drilled and the retaining
cone of the sampling probe firmly screwed in it.
The retaining screw in the cone enables the probe to be easily moved to locate the core flow, normally correspondent to the
center of the section of the smoke tube. The flue gas and exhaust gas pathway, should be checked for gas-tightness before
carrying out a measurement and, if necessary, non gas-tight points should be sealed.

sensor is essentially an electrochemical cell, with two electrodes and electrolyte solution. The behavior is similar to a

The O

2

normal battery and therefore the sensitivity decreases with time. The expected life does not relate to the operative time and is
lost after approximately 24 months.
The toxic gas measurements (CO, SO

The electrochemical cell grants accurate results for time intervals of approximately 60 minutes. The zero drift is automatically
corrected by the instrument every time the instrument is switched-on, using fresh ambient air as reference. This operation
should be made with the sampling probe not inserted in the chimney or with the sampling probe pneumatic connector
disconnected from the analyzer gas inlet.
When a long time analysis has to be made, a new autozero procedure should be performed.
The pressure/draught sensor is based on the principle of the extension metric measuring bridge. When the instrument is
switched-on, a zero calibration of the draught/pressure circuit is also executed. Leave open the “'P” connector during this
phase.
Measured and calculated parameters are indicated on a LCD alphanumeric display (40x56 mm), equipped with a automatic
back light device for easy readings, also in poor light conditions.

, NO and NO2) use electrochemical cells, with an expected operative life of 3 years.

2

12

Instruction Manual MM850481 ed. 03a

4.1.1 Gas sampling probe

The sampling probe consists of a steel tube and a handle of thermoinsulating material. A positioning cone allows to place the
probe in holes with a diameter from 11 to 16 mm.
The gas temperature is acquired using a thermocouple type K with the junction placed on the top of the tip.

4.1.2 Water trap & line filter

The gas flows through an external combined water trap and line filter to avoid the presence of condensation and suspended
solid particles in the analysis section of the instrument. A cylinder is positioned at 15 cm from the instrument gas inlet it is
divided into two parts: the water trap and the line filter.

The water trap works using the expansion principle: the gas flow decreases its speed inside the cylinder and it will cool; the
humidity will condense and the solid particles fall down. The section of the water trap must be periodically drained off to avoid
water from entering the analysis section. Pull the rubber plug and shake slowly the trap to drain the water. Push the rubber
plug to close the trap hole.

The line filter is positioned after the water trap and before the electrochemical cell. Its function is to stop the smallest solid
particles before the analysis. Remember to change the filter every time it is dirty.

Line filter
cat. EE650074

Rubber plug
cat. EE650081

WARNING

THE WATER TRAP MUST BE KEPT IN VERTICAL POSITION DURING GAS SAMPLING.AN INCORRECT POSITIONING OF THE TRAP CAN ALLOW

THE WATER TO ENTER INSIDE THE ANALIZER AND DAMAGE THE ELECTROCHEMICAL SENSORS.

NEVER MAKE ANY ANALYSIS WITHOUT THE DRAINING RUBBER PLUG. THE MEASUREMENTS WILL BE INCORRECT.

WHEN YOU FINISH THE ANALYSIS, REMEMBER TO DRAIN THE WATER TRAP.BEFORE PUTING THE GAS PROBE IN THE CARRYING CASE,

REMUVE THE CONDENSATE WATER FROM THE PROBE HOSE.

THE LINE FILTER SHOULD BE REPLACED WHEN DIRTY.NEVER MAKE ANY ANALYSIS WITHOUT LINE FILTER AND/OR WATER TRAP, AS IT

CAUSES AN IRREVERSIBLE DAMAGE TO THE ELECTROCHEMICAL SENSOR.

4.1.3 Gas sensors

The analyzer uses long life sensors for O2, CO (H2 compensated), NO, NO2 and SO2. The sensor do not need special
maintenance but must be replaced after the expected lifetime.
However a full maintenance and certification of the instrument is recommended at one year interval.
The gas sensors are electrochemical cells composed by two electrodes (anode and cathode) and an electrolyte solution. The
sampled gas goes trough a selective diffusion membrane.

13

Instruction Manual MM850481 ed. 03a

The oxidation process produces an output electrical signal proportional to the gas concentration. The signal is evaluated by
the electronics, converted to digital, processed by the microprocessor, displayed and printed with a 0.1% volume resolution.
The flue gas must not be at a pressure that could damage or destroy the sensor. Measurements are always carried out under
"pressureless" conditions. The maximum permissible excess/reduced pressure is ±100 mbar.
Each sensor has a different response time:

O

2

=

CO (H

comp.) = 50s to 90% of reading

2

20s to 90% of reading

CO = 50s to 90% of reading
NO = 40s to 90% of reading
NO

2

=

SO

2

OTE:TO OBTAIN AN ACCURATE MEASURE IT IS RECOMMENDED TO WAIT 3/5 MINUTES.

N

50s to 90% of reading

= 40s to 90% of reading

Toxic gas sensor can be present a ±2% drift and a long resuming time it an excessive (>150% of F.S.) gas concentration is
applied. In that case it is recommended to wait for a measured value lower than 20ppm, by sucking fresh air before switch
the analyzer off.
An optional Electro-valve can be installed inside the instrument to exclude/include manually or automatically the CO cell
when the CO concentration is too high (e.g. when the burner is starting)
Four acoustic and visual alarm levels can be set on four programmable parameters.

4.2 Auxiliary measurements

4.2.1 Temperature measurements

The instrument is equipped with two temperature inputs to measure exhaust gas and the burner air input temperatures
(combustion gas).

i A thermocouple type K (nickel-nickel chromium) is included in the tip of the gas sampling probe to measure the flue

gas/exhaust gas temperature. This thermocouple is suitable for permanent measurements at temperatures up to 800°C

and for short-term measurements up to 1000°C. Temperature measurement and gas sampling from the flue gas
pathway are thus always performed at the same site. The probe is connected to the apparatus with compensated cable
and connector. An internal Pt100 resistance thermometer is used for cold junction compensation.

i The same Tc K input can be used to measure the flow and return temperature

in water circuit. If you have to measure

the water temperature measuring the pipe temperature, use an arch-model thermocouple with an appropriate diameter.

i A remote Pt100 sensor, can be supplied on request with a 2 or 5 meter cable to measure the air inlet temperature

in

forced air boiler. This option is very important for an accurate efficiency calculation.

4.2.2 Pressure and Draft

The analyzer can be equipped with a temperature compensated pressure sensor to measure the chimney draft or pressure.
The pressure range is from -40 hPa to +200.0 hPa)

The sensor is factory calibrated and does not require manual adjustment.
The zero drift, caused by ambient air temperature variation, is automatically cancelled at each instrument start-up. In
addition, for more accurate readings the operator can reset, using the pertinent key, the zero if required. The instrument
sensor is differential type and, if connected to a Pitot tube, it can be used to measure gas speed.

OTE: WE SUGGEST TO EXECUTE THE AUTOZERO PROCEDURE FOR MORE ACCURACY BEFORE PERFORM THE MEASUREMENT.

N

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Instruction Manual MM850481 ed. 03a

CAUTION

IF A SINGLE TUBE GAS SAMPLING PROBE IS USED FOR PRESSURE/DRAFT M EAS URE MEN TS, BE SURE THAT IT IS CLE AN AND DRY BEFORE

A+300HPA (OR –300HPA) OVER-PRESSURE CAN PERMANENTLY DAMAGE THE PRESSURE SENSOR.

CONNECTION TO THE PRESSURE INPUT.

CAUTION

4.2.3 Smoke index measurement

This method consists of taking a gas sample from the center of the gas pipe behind the heat exchanger and crossing it
through a special filter paper.
The color of the spot on the filter is compared with a graduated (from 0 to 9) reference scale and it is called “smoke index”.
You can type in the instrument up to 3 smoke index values; the analyzer calculate the average value and can print these
values on the report.
Normative and laws about the air pollution, describe the procedure: DIN51402, 2116, 2117 and 2297 VDI directives, ASTM D
2156-63 T, etc.

4.2.3.1 Measuring instruments (option)

1. Smoke pump: it should suck 5.75 litres r0.25 l (normalized to 0°C, 760mmHg) through a 1 cm2 filter.

2. Smoke index reference table: it is a grey scale sheet with 10 different areas numbered from 0 to 9. The number 0

corresponds to a 85% r2.5% reflection. Every area reflects 10% less than the previous one. The scale is used to
compare the scale with the paper filter and to calculate the smoke index.

3. Paper filter: When it is clean it has a reflection corresponding to the 0 scale index. It also has 3 litres per cm

(normalized to 0°C, 760mmHg) with a 200/800 mmwc resistance to the air flux.

2

a minute

4.2.4 Other measurements

The analyzer has an auxiliary input for special probes connections. Available probes are: ambient CO monitoring, and natural
gas monitoring probes.
An optional operative mode is the leakage pipe test to check gas network tightness using pressure decay method at
programmable interval time.

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Instruction Manual MM850481 ed. 03a

5 RECOMMENDATIONS

 The analyzer should be used in environments where the temperature is between -5°C and +45°C.
 When the analysis are completed, before switch the instrument off, remove the probe from the gas pathway and wait

about 30 seconds cleaning the pneumatic circuit from gas.

 Do not use the analyzer with clogged filters or filled with humidity.
 Before placing the probe in the case, be sure that the probe, the water trap and the hose are clean and cold.
 If you have ordered a double hose sampling probe, insert both connectors to the instrument during the gas analysis (pay

attention to color correspondence).

 To empty the water trap from the condensate water, remove the draining plug. DO NOT OPEN the water trap. DO NOT

leave the water trap without the draining rubber plug.

 For the best efficiency and accuracy, we suggest to calibrate the instrument every year.

WARNING

IF THE EGA4 IS STORED AT TEMPERATURE EXCEEDING THE OPERATIVE LIMITS, THE ANALYZER NEEDS SOME MINUTES TO WARM-UP TO

THE ACTUAL AMBIENT TEMPERATURE, BEFORE STARTING THE OPERATION.

5.1 Power supply

The instrument can be powered from:

 Internal rechargeable Li-Ion battery.
 External battery charger, supplied as a standard accessory (the batteries must be installed).
 Optional external DC auto battery charger (the batteries must be installed).

The Ni-MH rechargeable batteries allows a long time operation and do not need maintenance. The same batteries power
both the instrument and the internal printer. The internal battery will grant 5 hours continuous operation (without printing and
display back light off).

OTE:90% BATTERY CHARGING CAN BE OBTEINED IN 3 HOURS WITH THE INSTRUMENT SWITCHED OFF.

N

During operation a fully battery symbol “i” will be displayed on the display. This symbol means that the batteries are
completely full. When the batteries will be discharged the symbol “–” will appear and the instrument still has about 20
minutes operation capability to end the running analysis.
The battery symbol indicates that a full charge is required. Use only the dedicated battery charger supplied by Eclipse
together the instrument.

CAUTION: O

THE INSTRUMENT IS SHIPPED WITH AN AVERAGE LEVEL OF BATTERY CHARGE.AFTER UNPACKING, A FULL CHARGE OF THE BATTERY IS

RECOMMENDED, BY CONNECTING THE INSTRUMENT TO THE MAIN LINE THROUGH THE BATTERY CHARGER (OFF CONDITION) FOR 8/10

LD BATTERIES CAN LEAK AND CAUSE CORROSION.NEVER LEAVE RUN DOWN BATTERIES IN THE INSTRUMENT

WARNING

HOURS.

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Instruction Manual MM850481 ed. 03a

p

6 CONNECTIONS

6.1 Electro-pneumatic connections

To prepare the instrument for operation connect the sampling probe to the instrument:

x Plug the pneumatic connector of the probe to the GAS INLET connector. If you are using the gas sampling probe with

Draft option, connect also its connector to the instrument Pressure/Draft inlet.

x Plug the probe temperature sensor plug to the pertinent connector.
x For more accurate readings and efficiency calculations, plug the remote air temperature Pt100 sensor to the

connector on the right side of the instrument.

INLET – gas input

P2 – differential

ressure input

External probes
and Pt100 Ta ir
input

P1 – Draft/Pressure

Battery charger

input

USB port

Tgas input

pneumatic ports

Right side

6.2 Gas probe positioning

The measurement site should be arranged at a distance of 2xD behind the exhaust gas connection pipe, where D = diameter
of the exhaust gas connection pipe.
To position the sampling probe in the exhaust gas pathway a hole of 11/16mm should be drilled and the retaining cone of the
sampling probe firmly screwed in it.
The retaining screw in the cone enables the probe to be easily moved in order to locate the core flow, normally
correspondent to the center of the section of the stack.
The flue gas and exhaust gas pathways, must be checked for gas-tightness before carrying out a measurement and, if
necessary, non gas-tight points should be sealed.
To locate the gas core flow, insert progressively the sampling probe and read the maximum value of temperature.

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Instruction Manual MM850481 ed. 03a

Tair probe

CAUTION

FOR A CORRECT GAS ANALYSIS, NO AIR MUST REACH THE FLUE GAS AS A RESULT OF NON-GAS-TIGHT CONNECTION POINTS BETWEEN THE

THE FLUE GAS AND EXHAUST GAS PATHWAYS MUST BE CHECKED FOR GAS-TIGHTNESS BEFORE CARRYING OUT A MEASUREMENT, AND IF

HEAT PRODUCER AND THE MEASUREMENT SITE (PROBE).

NECESSARY NON-GAS-TIGHT POINTS SHOULD BE SEALED.

6.3 Connecting to a PC

The instrument can operate with a personal computer through the USB serial port.

USB Cable EE700476

6.3.1 USB installation

The instrument can be used to directly connect the instrument to a USB computer port using the Windows™XP and
Windows™ 95/98 operative system. Depending on the configuration of the computer, the adaptor could be automatically
identified or not. If the adaptor isn’t properly identified you’ll need to manually install its driver, that you can find on the
instrument’s software CD.

You need to follow the driver installation below only at first connection of the instrument. Then, every time you connect the
adaptor to your USB port, it will be automatically identified and it will be ready to operate.

x If you have previously installed a similar driver on your pc and the drivers that are about to install are different from those

already installed, please uninstall the already installed drivers FIRST. Please refer to the Driver’s Uninstall procedure of
your Operating System.

18