Wohler A 550 User manual

The Measure of Technology
Operation Manual
Flue Gas Analyzer
Wöhler A 550
Wöhler A 550 L
Wöhler A 550 H
.
Best.-Nr.23442 – 2018-02-08

Contents
2
Contents
1General Information..............................5
1.1 Operation Manual Information....................... 5
1.2 Notes............................................................. 5
1.3 Intended Use................................................. 5
1.4 Basic features ............................................... 6
1.5 Transport and stocking.................................. 6
1.6 Information on disposal ................................. 7
1.7 Manufacturer ................................................. 8
1.8 Important information .................................... 8
2Features and functions ........................9
3Specifications......................................10
3.1 Readings..................................................... 10
3.2 Calculated Values ....................................... 14
3.3 Technical Data ............................................ 15
4Setting up the instrument ..................16
4.1 Component Explanation.............................. 16
4.2 Probes and sensors .................................... 19
4.3 Tightness test.............................................. 21
4.4 Display ........................................................ 22
4.5 Gas sampling path Wöhler A 550................ 23
5Getting started ....................................25
5.1 Charging the battery.................................... 26
5.2 Connecting the probe and cable-hose
assembly..................................................... 27
5.2.1 Connecting the probe.................................. 27
6Using the Analyzer..............................29
6.1 Turning the analyzer on and off................... 29
6.2 Hotspot search ............................................ 29
6.3 Measuring ................................................... 31
6.3.1 Readings screen ......................................... 31
6.3.2 Selecting the fuel......................................... 33
6.3.3Setting the fuel parameters ......................... 33

Contents
3
6.3.4 Options ........................................................34
7Readings Menu ...................................37
7.1 Delete data .................................................. 37
7.2 Print data ..................................................... 37
7.3 Save data in the customer menu. ................ 38
8Menu .................................................... 39
8.1 Device data..................................................40
8.2 Ambient CO .................................................41
8.3 Wood moisture............................................. 42
8.3.1 Theoretical background ...............................42
8.3.2 Connecting the Probe..................................43
8.3.3 Measuring.................................................... 43
8.4 Spillage test ................................................. 46
8.5 Tuning Guide ............................................... 48
8.6 Manifold Pressure........................................49
8.7 Temperatures .............................................. 50
8.8 4 Pa - Test ................................................... 51
8.9 Logger Measurement (Wöhler A 550, only). 56
8.10 SETUP......................................................... 59
8.11 Calibration ................................................... 62
9Customer data .................................... 62
9.1 Set up a new customer................................ 62
9.2Save records................................................64
9.3 Search function : customer, installation,
customer number, installation number.........65
9.4 New customer.............................................. 66
9.5 Delete customer...........................................66
9.6 Delete all......................................................66
10 Data exchange with the PC............... 66
11 Troubleshooting .................................66
12 Maintenance ........................................ 67
12.1 Maintenance work........................................ 67
12.2 Replacing the filters ..................................... 68
12.2.1 Coarse Filter ................................................68

Contents
4
12.2.2 Removing condensate................................. 68
12.2.3 Replace cotton filter..................................... 69
12.2.4 Water Stop Filter ......................................... 69
12.3 Sensor diagnosis and replacement ............. 70
12.4 Replacing the battery .................................. 74
12.5 Replacing the electrodes of the wood moisture
probe........................................................... 76
13 Analyzer check....................................76
14 Warranty and Service .........................77
15 Declaration of conformity ..................77
16 Accessories.........................................78
Points of sale and service ............................79

General Information
5
1 General Information
1.1 Operation Manual In-
formation
This operation manual allows you to work safely
with the Wöhler A 550. Please keep this manual
for your information.
The Wöhler A 550 should be employed by profes-
sionals for its intended use only.
Liability is void for any damages caused by not
following this manual.
1.2 Notes
WARNING!
Not following this warning can cause injury or
death.
ATTENTION!
Not following this note can cause permanent
damage to the device.
NOTE!
Useful information
1.3 Intended Use
Use the Wöhler A 550 for flue gas analysis and
control of heating appliances and for the meas-
urement of wood moisture.
The analyzer should be used indoors only.
The Wöhler A 550 is not suitable for continuous
operation.
It takes about 3 minutes to take a typical meas-
urement.

General Information
6
1.4 Basic features
Device
Basic equipment
Wöhler A 550
and Wöhler A 550 H
Probe and hose as-
sembly with 3 m hose
Flue Gas Probe
295 mm
Ambient Temperature
Probe (option)
Wood Moisture Probe
(option)
Pressure adapter
Charger with micro-
USB-cable
1 Water stop filter
1 Coarse Filter
Wöhler A 550 L
Probe and hose as-
sembly 1,7 m
Flue gas probe 295
mm
Wood Moisture Probe
(option)
Charger with micro-
USB-cable
1 Water stop filter
1 Coarse Filter
1.5 Transport and stocking
ATTENTION!
Improper transport can harm the instrument.
Always transport the analyzer in the provided car-
rying case in order to prevent damage.

General Information
7
Fig.
1: Transport lock in the probe com-
partment
ATTENTION!
For the transport deactivate the battery with the
transport lock.
•
Deactivate the battery by pushing the
transport lock to the right with a pointed object
(wire or pen).
When the instrument is delivered, the battery is
always deactivated.
1.6 Information on disposal
Electronic equipment does not belong into domes-
tic waste, but must be disposed in accordance
with the applicable statutory provisions.
You may hand in any defective batteries taken out
of the unit to our company as well as to recycling
places of public disposal systems or to selling
points of new batteries or storage batteries.
Lock the
analyzer

General Information
8
1.7 Manufacturer
Wöhler Technik GmbH
Wöhler-Platz 1
33181 Bad Wünnenberg
Tel.: [phone]
Fax: [phone]
E-Mail: [e-mail]
1.8 Important information
ATTENTION!
In order to ensure the quality of the application and the measurement result, the ana-
lyser may only be used with original Wöhler accessories and original Wöhler spare
parts. This applies in particular to legally regulated measurement tasks
ATTENTION!
Do not expose the instrument to moist flue gas, if it has been exposed to temperatures
below 0°C for a certain time. This may harm the instrument.
ATTENTION!
The instrument is equipped with strong magnets to fix it during the measurement. The
magnetic field may harm heart pacemakers, hard disks, data mediums, magnetic stripe
cards, controls etc. Keep sufficient distance to magnet-sensitive objects.
ATTENTION!
Always use the CHP filter Wöhler A 550 (article 5523) when measuring the flue gas of
combustion engines.
CO sensors may be affected by H
2, NO or NO2-concentrations in the flue gas. Normally
these influences are compensated by our
technology.
The NO and NO
2concentration in the flue gas of combustion engines is often much
higher than in the flue gas of a typical small heating systems. This high concentration
overrides the protection mechanism of the CO cell
and damages the cell.
Do not use the CHP filter Wöhler A 550, if you want to measure the NO Concentration of
the flue gas of the combustion engine with a CO cell.

Features and functions
9
2 Features and functions
Wöhler A 550
Wöhler A 550 L
Applications (depending on the accessories)
4 Pa-Test

Wood moisture


Spillage test


Tuning guide


Possible number of sen-
sors
5
3
Functionality
Fresh air pump: search
for the hotspot during
fresh air calibration is
possible

Start/Stop-Button: Re-
mote control via the
probe

1,000 data sets


USB and infrared inter-
face


Bluetooth interface

option
CO protection pump



Specifications
10
3 Specifications
3.1 Readings
Oxygen (O
2
) concentration in flue gas
Reading
% of flue gas volume (dry conditions)
Meas. principle
electrochemical sensor
Range
0.0 to 21.0 %
Accuracy
± 0.3 Vol. -%
Carbon monoxide (CO
V
4,000 ppm) in flue gas
(Wöhler A 550 and Wöhler A 550L)
Unit
ppm of flue gas volume (dry conditions)
Measurement
principle
Electrochemical sensor
Range
0 to 4,000 Vol. ppm, resolution 1 Vol.-ppm
Accuracy
± 20 ppm (< 400 ppm), otherwise 5% of reading
Carbon monoxide in flue gas (Option for Wöhler A 550)
Unit
ppm of flue gas volume (dry conditions)
Meas. principle
Electrochemical sensor
Range
0 to 100,000 Vol. ppm, resolution 1 Vol.-ppm
Accuracy
± 100 ppm (< 1,000 ppm), otherwise 10% of reading
(when H2 < 5 % of reading)
Carbon monoxide (CO
V
4,000 ppm) in flue gas
(Wöhler A 550 H)
Unit
ppm of flue gas volume
Meas. principle
Electrochemical sensor , H
2
compensated
Range
0 to 4,000 Vol. ppm, resolution 1 Vol.-ppm
Accuracy
± 20 ppm (< 400 ppm), otherwise 5% of reading

Specifications
11
Carbon monoxide in flue gas (Wöhler A 550 L)
Unit
ppm of flue gas volume (dry conditions)
Measurement
principle
Electrochemical sensor
Range
0 to 35,000 Vol. ppm, resolution 1 Vol.-ppm
Accuracy
± 100 ppm (< 1,000 ppm), otherwise 10% of reading
(when H2 < 5 % of reading)
Nitrogen monoxide (NO
V
) in flue gas (option)
Unit
ppm of flue gas volume (dry conditions)
Measurement
principle
electrochemical sensor
Range
0 to 3,000 Vol. ppm resolution 1 Vol.-ppm
Accuracy
±5 vol. ppm (<100ppm), otherwise 5 % of reading
Nitrogen dioxide (NO
2
) in flue gas (option)
Unit
ppm of flue gas volume (dry conditions)
Measurement
principle
electrochemical sensor
Range
0 to 1,000 Vol. ppm
resolution 1 Vol.-ppm
Accuracy
±5 vol. ppm (<100ppm), otherwise 5 % of reading
Sulfur dioxide (SO
2
) in flue gas (option)
Unit
ppm of flue gas volume (dry conditions)
Measurement
principle
electrochemical sensor
Range
0 to 5,000 Vol. ppm
resolution 1 Vol.-ppm
Accuracy
± 10 vol. ppm (0 ... 200 ppm), otherwise 5 % of reading
Draft (PD) with 4 Pa Test (only Wöhler A 550)
Unit
Pascal
Measurement
principle
Semiconductor

Specifications
12
Draft (PD) (only Wöhler A 550L)
Unit
Pascal
Measurement
principle
Semiconductor
Range
0.00 to ± 110.00 hPa, resolution 1 Pa
Accuracy
2 Pa (< 40Pa), otherwise 5% of reading
Flue gas temperature (TS)
Unit
°C
Measurement
principle
Thermocouple (NiCr-Ni)
Range
-20.0 °C to 800.0 °C, resolution 0.1 °C
Accuracy
0 - 133 °C ± 2°C; 133 to 800 °C: 1.5% of reading
Ambient Temperature (TA)
Unit
°C
Measurement
principle
Thermocouple (NiCr-Ni)
Range
-20.0 °C to 100 °C, resolution 0.1 °C
Accuracy
± 1°C

Specifications
13
Wood moisture
Reading
water mass related to the absolute dry fuel mass
Measurement
principle
resistance measurement
Range
10.0 to 40.0 %,
resolution 0.1 %
Accuracy
40 % of reading
wood
temperature
5 to 25° C
lifetime of the
electrodes
Depending on the frequency of utilization
The electrodes will work correctly, if there is no surface damage
or bending.

Specifications
14
3.2 Calculated Values
Calculated Value
Explanation
Efficiency /SL
Efficiency and losses in accordance to ASME standards
ETA/QS
Efficiency and losses in accordance to European standards
(0.0 to 120%)
CO
2
in Vol. -%
Range
0 – CO2max, resolution 0.1 %
CO
c
, SO
2c
; NO
c
, NO
2C
air free (corrected)
Default: 0% (oil and gas).
Dpt
°C
Dew Point in the flue gas
Medium soot level
Soot number ± 0.1
Excess air coefficient
Lambda λ(e.g. 1,25 when the excess of air is 25%)
C
on
Condensate quantity in condensing conditions
Toxication index GI
CO/CO
2
Air velocity
0.1 to 130 m/s, resolution < 0.1 m/s, for the measurement of
the ventilation loss (heating check)

Specifications
15
3.3 Technical Data
Description
Data
Power supply
Rechargeable Lithium-ion battery 3.7 V, 6700 mAh, charg-
ing via USB
Operation time
Approx. 12 h (depending on the operating mode and the
display backlight)
Charging time for a full
charge
Approx. 7 hours
Charging cycles of the
batteries:
After 500 charging cycles, at least 70% of the capacity are
still available
Storage Temperature
-20 °C to 50 °C
Operation temperature
+5 °C to 40 °C to guarantee the specified accuracy
Relative humidity
30% to 70 %
Weight
1250 g
Dimensions
220 x 160 x 55 mm (without probe)
Length of the hose
1700 mm (Wöhler A 550L)
3000 mm (Wöhler A 500)

Setting up the instrument
16
4 Setting up the instrument
4.1 Component Explanation
Fig. 2: Device front
Explanation
1 On/off-button
2 Condensate trap
3 Opening handle for the condensate trap
4 Probe compartment
5 Opening handle for the probe compart-
ment
NOTE!
Open the probe compartment by pulling down the
opening handle.
6 Bottom of the analyzer with connectors
7 Loops to fix the probe
1
2
3
4
5
6
7

Setting up the instrument
17
Fig.
3: Probe handle with gas probe (only Wöhler A 550)
Probe probe handle:
8 ON/Off-Key (only Wöhler A 550)
9 Gas Probe
10 Union nut
11 Plexiglas plug with Coarse Filter
On/Off-key (8)
Fig.
4: Pressing the ON/Off-Key during
the measurement (only
Wöhler A 550)
It is possible to start and stop the measurement
with the On/Off-key (8) of the probe handle. This
permits an easy handling in difficult measurement
conditions.
8
9
10
11

Setting up the instrument
18
Fig.
5: Connectors at the bottom
Connectors at the bottom of the analyzer
12 USB port for data transmission and
charger
13 IR Interface for the printer
14 Moisture probe connector
15 Ambient temperature probe connector
16 Negative pressure connector
17 Loud speaker for alarm signals
Fig.
6: Probe compartment
Probe compartment
18 Gas probe connector
Fig.
7: Interior of the probe compartment
Wöhler A 550
19 Red point of orientation
20 Transport lock in the probe compartment
•
Deactivate the battery by pushing the
transport lock to the right (see figure opposite)
with a pointed object (wire or pen).
12
13
14
15
16
17
18
19
20
I
o

Setting up the instrument
19
4.2 Probes and sensors
NOTE!
The following probes are included in the corre-
sponding sets. They can also be purchased as
accessories.
Fig.
8: S-tube probe
S-tube probe for measuring the flow speed with
adapter
Fig.
9: Flexible capillaries
Flexible capillaries for the 4 PA test (an adapter is
needed)
Always use the CHP filter Wöhler A 550 (article
5523) when measuring the flue gas of combustion
engines..
Fig.
11: Probe handle with pressure
adapter
Screw the pressure adapter on the probe handle
and plug the flexible capillary on the pressure
adapter.
Fig. 10: Probe handle with CHP filter

Setting up the instrument
20
Fig.
12: Ambient Temperature Plug
Ambient Temperature Plug
Fig.
13: Ambient Temperature Probe
Ambient Temperature Probe
Wöhler A 550, 185 mm
Fig. 14: Wood Moisture Probe
Wood Moisture Probe
Fig.
15: Spillage Probe
Spillage Probe