Wohler A 400 User manual

Operation Manual
Flue Gas Analyzer
Wohler A 400
Wohler A 400PRO
The Measure of Technology
p/n 22159 – 2012-01-27

Contents
2
Contents 1General Information..............................4
1.1 Operation Manual Information....................... 4
1.2 Notes............................................................. 4
1.3 Intended use ................................................. 4
1.4 Components.................................................. 4
1.5 Transport....................................................... 6
1.6 Manufacturer................................................. 6
1.7 North American Headquarters....................... 6
2Specifications........................................7
3Component Explanation ....................10
3.1 Models......................................................... 12
3.2 Functions..................................................... 12
3.3 Display and key setup................................. 14
4Getting started ....................................15
4.1 Check battery status.................................... 15
4.2 Connect the probe and hose assembly
(Wohler A 400PRO only) ............................... 17
4.3 Tightness test.............................................. 17
4.4 Manifold pressure connector....................... 18
5Using the Analyzer..............................18
5.1 Key functions............................................... 18
5.2 Turning the analyzer ON............................. 19
5.3 Performing a combustion efficency test....... 20
5.4 Main menu .................................................. 21
5.4.1 Option 'TUNING GUIDE' ............................. 22
5.4.2 Option 'AMBIENT CO'................................. 23
5.4.3 Option 'PRINT RECORD'............................ 24
5.4.4 Option 'FUEL SELECTION'......................... 25
5.4.5 MANIFOLD PRESSURE............................. 27
5.4.6 Option 'GRAPH'........................................... 27
5.4.7 Option 'SAVE RECORD'............................. 28
5.4.8 Option 'PR MEASUREMENT' ..................... 29
5.4.9 Option 'DATA MANAGEMENT'................... 29

Contents
3
5.4.10 Option 'SETUP'............................................30
5.4.11 Option 'CALIBRATION'................................32
5.5 Turning OFF the analyzer............................32
6Troubleshooting .................................33
7Maintenance........................................34
7.1 Maintenance work........................................34
7.2 Removal of condensate...............................35
7.3 Safety features and maintenance advice.....35
7.3.1 Filter light.....................................................35
7.3.2 LT-filter ........................................................35
7.4 Maintenance and change of sensors...........36
7.4.1 Cleaning the gas way ..................................36
7.4.2 Sensors .......................................................36
7.4.3 Sensor diagnosis and change......................37
8Warranty and Service.........................41
8.1 Warranty......................................................41
8.2 Service.........................................................41
9Accessories.........................................42

General Information
4
1 General Information
1.1 Operation Manual
Information This operation manual allows you to safety work
with the Wohler A 400 Flue Gas Analyzer. Please
keep this manual for your information.
The Wohler A 400 should be used by trained
professionals 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 analyzer.
NOTE!
Usefull information
1.3 Intended use
Do not use the Wohler A 400 Flue Gas Analyzer
for any other use than set out in this manual.
The analyzers should be used indoors only.
Use the Wohler A 400 for flue gas analysis of
heating appliances, ambient CO and manifold
pressure tests only.
1.4 Components
Model
Components
Wohler A 400 Integrated flexible
probe
Heavy duty carrying
case
Batteries

General Information
5
Replacement filters
Model Componenets
Wohler A 400PRO
Probe and hose
assembly
Heavy duty carrying
case
Batteries
Replacement filters
Available sets may include:
•rechargeable batteries and recharger
•Wohler TD 600 high speed thermal
printer
•Wohler RP 72 Soot Pump
•Ambient temperature probe 280

6
1.5 Transport
ATTENTION!
The analyzer should be transported in the original
carrying case only!
To prevent damage to the analyzer use the
original carrying case when transporting.
The carrying case can be purchased separately.
1.6 Manufacturer Wöhler Messgeräte Kehrgeräte GmbH
41 Schützenstrasse
Bad Wünnenberg, Germany, 33181
1.7 North American
Headquarters
Wohler USA Inc.
20 Locust Street
Danvers, MA, 01923
Phone [phone]
Fax [phone]
Email [e-mail]
www.wohlerusa.com

Specifications
7
2 Specifications
Oxygen (O2)
Sensor type
electrochemical
Range 0 … 21.0 Vol.-%
Resolution
0.1 Vol.-%
Accuracy ± 0.3 Vol.-%
Carbon monoxide (CO 4,000 ppm)
Sensor type electrochemical
Range
0 … 4,000 ppm
Resolution
1 ppm
Accuracy
± 5 % f.m., absolute
± 20 ppm
Nitrogen monoxide (NO 1,000 ppm)
(only A 400PRO)
Sensor type
electrochemical
Range 0 … 1,000 ppm
Resolution
1 ppm
Accuracy
± 5 ppm (<100 ppm),
else 5% of reading
Draft / Differential pressure(PD)
Units
inWC / psi / Pascal /
mbar
Range
± 40 inWC
Resolution 0.004 inWC
Accuracy
± 2 % f.m., absolute
± 0.02 inWC

Specifications
8
Flue Gas Temperature (TS)
Units
°F /°C
Sensor type
Thermoelement (NiCr-Ni)
Range
-4°F … 1472°F
Resolution 0.2°F
Accuracy
32…257°F: ±4°F
257…482°F: ±6°F
482…752°F: ±8°F
252…1472°F: ±1.5%
Air Temperature (TA)
Units
°F /°C
Sensor type Semiconductor(Si-PTC-Ni)
Range
-4°F … 248°F
Resolution
0.2°F
Accuracy
±2°F
Calculated Values
Effc. / SL efficiency and losses
in accordance to
ASME standards
ETA /QS
efficiency and losses
in accordance to EN
European standards
CO2 in Vol.-% range 0 – CO2max,
resolution 0.1%
COc
CO air free (CO
corrected)
Dew point
in °F / °C
λ/ EA
theoretical air /
excess air
mcond
Condensate qty. in
condensing conditions
Toxication index Gi
CO/CO2

Specifications
9
Power supply
4 AA rechargeable
batteries or 4 AA
disposable batteries
1.5 Volt.
Current
150 mA (normal
backlight setting),
Standby current 44 µA
Voltage
Battery: 4.0 to 7.2 V,
standard 4.8 V
Storage temperature
-4 °F to + 122 °F
Operation temperature 41 °F to 104 °F to
meet specifications
Weight 1.4 lbs / 640 g
Dimensions
8 x 3.3 x 8.7 inch (w/o
probe)
29.1 x 3.3 x 8.7 inch
(with flexible probe)
Wohler A 400
PRO
:
probe hose length 1700 mm / 67 inch
Wohler A 400:
flexible probe length 540 mm / 21 inch

Component Explanation
10
3 Component Explanation
Figure 1: Overview Wohler A 400PRO
1
13
2
3
4
12
11
14
5
6
8
7
14
10
9