Dwyer Instruments 1207A User manual

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Combustion
Gas Analyzers/Kits TEST & DATA
The MODEL 1205B Handheld CO/CO2Gas Analyzer accurately measures the
concentration of carbon monoxide (CO) and carbon dioxide (CO2) in a duct or space
and displays the measurement on a dual line backlit LCD. The unit’s memory stores
up to 255 sets of readings that are logged manually or auto-logged with 1 to 10 minute
intervals. Results can then be printed via an optional infrared printer.
FEATURES/BENEFITS
• Displays carbon monoxide and carbon dioxide concentrations simultaneously
• Stores up to 255 sets of readings for future evaluation
• Usercongurablealarms
APPLICATIONS
• Service and adjustment of boilers, ovens, and other combustion equipment
1-8-3/4
[476.25]
3-3/4
[95.25] 3-11/32
[85.09]
8
[203.20]
7-35/64
[191.77]
1-21/32
[41.91]
HANDHELD FLUE GAS COMBUSTION ANALYZER
Rotary Dial Selection,Display 4 Parameters Simultaneously
The MODEL 1207A Handheld Flue Gas Combustion Analyzer allows users to monitor
four parameters simultaneously and change the parameters shown using the rotary
dial selection switch. The unit’s memory stores up to 255 time stamped test sets and
can output the measurements to a serial printer. For extra protection, the analyzer
comes standard with a protective boot and magnetic back.
FEATURES/BENEFITS
• Displays4congurableparameterssimultaneously
• Stores up to 255 time stamped test sets for future evaluation
APPLICATIONS
• Service and adjustment of boilers, ovens, and other combustion equipment
1/4
[6.35]
7-7/8 [200.00]
10˝ [3000]
LONG
NEOPRENE
HOSE
3-3/4
[95.25]
8
[203.20]
3-11/32
[85.09]
7-35/64
[191.77]
1-21/32
[41.91]
SPECIFICATIONS
Ranges: CO:0to1000ppm,overow
2000 ppm; CO2: 200 to 4000 ppm,
overow9999ppm.
Accuracy: CO: ±5 ppm<100 ppm;
±5%>100 ppm; ±10%>1000 ppm;
CO2:±20 ppm<400 ppm; ±5%<4000
ppm; ±10%>4000 ppm.
Resolution: CO: 1 ppm; CO2: 1 ppm.
Display: Dual LCD display.
Temperature Limits: 32 to 104°F
(0 to 45°C).
Humidity Limits (Non-Condensing): 10
to90%RH.
Power Requirements: 100 to 240 VAC,
50 to 60 Hz or (5) AA NiMH batteries,
internal, factory replaceable.
Battery Life: 6 hours with full charge
and pump on.
Weight: 2.21 lb (1 kg).
SPECIFICATIONS
Range: O2: 0 to 21%; CO: 0 to 2000
ppm (4000 ppm max for 15 minutes);
CO2:0to30%;Temp.(ueandnet):32
to1112°F(0to600°C);Efciency:
0to99.9%;Excessair:0to250%.
Accuracy: O2: ±0.2%; CO: ±10 PPM
< 100 PPM else ±5% of reading;
CO2:±0.3%reading;Temp.(ue
and net): ±2°C ±0.3% reading;
Efciency:±1%reading;Excessair:
±0.2%.
Resolution: O2: 0.1%; CO: 1 PPM;
CO2:0.1%;Temp.(ueandnet):
0.1°F/C;Efciency:0.1%;Excess
air: 0.1%.
Ambient Operating Temperature: 32 to
104°F (0 to 40°C).
Power Requirements: (8) AA
alkaline batteries, installed functional,
user replaceable, (4) AA NiMH batteries,
included, user replaceable (charger
included) or optional power adapter.
Pre-Programmed Fuels: Natural gas,
light oil, propane, butane, LPG, and
wood pellets.
Probe: 11.8˝(300mm)lengthx0.25˝
(6mm)diameterwith7.8˝(200mm)
stainless steel shaft.
Hose: 10 ft (3 m).
Weight: 1.7 lb (0.77 kg).
Agency Approvals: CE.
HANDHELD CO/CO2GAS ANALYZER
Measures IndoorAir Quality,Includes Sampling Probe with Hose
MODEL 1205B
®
MODEL 1207A
MODEL CHART
Model Description
1205B-0 Gas analyzer and logger for CO and CO2
MODEL CHART
Model Description
1207A Handhelduegascombustionanalyzer
ACCESSORIES
Model Description
1205B-US
1205B-EU
1205B-PR
120 VAC power adapter for 1205B
240 VAC power adapter for 1205B
Replacement probe for 1205B
ACCESSORIES
Model Description
1207A-US
1207A-EU
1207A-SP
1207A-PP
1207A-RF
120 VAC power adapter
230 VAC power adapter
Serial printer
Printer paper for 1207A-SP
Replacementlter

DWYER 1207A
Flue Gas Analyzer
Dwyer Instruments Inc
P.O. Box 373
Michigan City
INDIANA, H6361
USA
Tel: [phone]
Fax: [phone]
Stock No: 18744-2 September 2009

1207A manual Page 2
CONTENTS
Page No:
DWYER 1207A USER GUIDE 3
1. ANALYZER FEATURES AND KEYPAD 4-5
2. BEFORE USING THE ANALYZER FOR THE FIRST TIME 6
3. BEFORE USING THE ANALYZER EVERY TIME 7
4. USING THE ANALYZER AND ITS FOUR BUTTONS 8-9
5. USING THE DWYER 1207A AS A THERMOMETER OR PRESSURE
METER 10
6. USING THE ROTARY DIAL (STARTING FROM MENU) 11-13
7. MAIN MENU FUNCTIONS 14-17
8. MEASURING MODES 18-24
- MEASURING FLUE GASES 18
- STANDARD COMBUSTION PRINTOUT 19
-STORING A DRAUGHT MEASUREMENT TO PRINT WITH A
COMBUSTION TEST 20
- MEASURING PRESSURE 21
- MEASURING TEMPERATURE 22
- MEASURING AMBIENT AIR (ROOM CO) 23
- MEASURING FLUE DRAUGHT 24
9. WHEN YOU FINISH A COMBUSTION TEST 25
10. ANALYZER PROBLEM SOLVING 26
11. ANALYZER ANNUAL RECALIBRATION AND SERVICE 27
12. ANALYZER SPECIFICATION
(NOTE MAY BE SUBJECT TO CHANGE ) 28-29
13. ELECTROMAGNETIC COMPATIBILITY 30
APPENDIX 1 – MAIN PARAMETERS 31-32

1207A manual Page 3
DWYER 1207A
User Guide
The DWYER 1207A Combustion Analyzer measures O
2,
differential
temperature, differential pressure and CO.
It calculates efficiency (Nett, Gross or Condensing), losses, the CO/CO
2
ratio,
Poison Index, excess air and CO air free in ppm only.
The analyzer can be upgraded with the addition of a Nitric Oxide sensor either
on initial purchase or as a retrofit as part of an annual service procedure.
In addition the DWYER 1207A Combustion Analyzer’s CO sensor checks
carbon monoxide levels in ambient air - useful when a CO Alarm is triggered
and tests the safety of appliances.
The CO and NO readings can be referenced to the oxygen reading in ppm or
mg/m
3
.
It has a protective rubber sleeve with a magnet for “hands–free” operation and
their flue probes work on all combustion appliances and take ambient air
measurements.
The large display shows 4 readings at a time and all data can be printed via an
optional infrared printer. The printed data can be 'live' data, 'frozen' data or
'stored' data. 255 sets of tests can be stored. Note: stored data is lost if the
batteries are removed or are exhausted. Two lines of 16 characters can be added
to the header of printouts.
The analyzer is controlled using 4 buttons and a rotary dial.
The four buttons (from left to right) switch on and off the analyzer, print actual
or frozen data/ switch on and off the backlight, switch on and off the pump and
“freeze”/ hold data. The buttons with , and arrows also change
settings such as date, time, fuel source, etc. when in MENU mode.
The rotary dial changes the LED indicated display line and selects access to the
menu to make changes to the date, time, fuel, etc.

1207A manual Page 4
1. ANALYZER FEATURES AND KEYPAD
ON / OFF
Turns the analyzer ON / OFF
PUMP / CAL PRESSURE
Turns the pump ON / OFF
Press for 2+ seconds to zero the
pressure sensor
PRINT / BACKLIGHT
Press to print “live” or “frozen”
data. Press again to abort.
Press for 2+ seconds to switch
backlight & torch ON / OFF
LINE SELECT / FREEZE
Press to select active line on
display as indicated by LED’s
Press for 2 seconds to “HOLD”
Press longer to “LOG”

1207A manual Page 5

1207A manual Page 6
2. BEFORE USING THE ANALYZER FOR THE FIRST
TIME:
Turn over the analyzer, remove its’ protective rubber sleeve and fit 4 “AA” batteries in the
battery compartment. Take great care to ensure they are fitted with the correct battery
polarity. Then replace the battery cover and protective rubber sleeve. Always check that the
analyzer is working correctly after replacing batteries.
Set the analyzer’s correct time, date, fuel source, etc., after it is switched on and calibrated –
See USING THE ROTARY DIAL below. These settings are stored when the analyzer is
switched off.
Using Re-Chargeable Batteries.
This analyzer has been designed for use with both alkaline and rechargeable Nickel Metal
Hydride (NMiH). No other battery types are recommended.
WARNING
The battery charger unit must only be used when NMiH batteries are fitted.
NMiH batteries are entirely suitable for top up charging at any time, even for shorts periods.
Alkaline batteries are not re-chargeable. Attempting to recharge Alkaline batteries may result
in damage to the product and may create a fire risk.
Ensure the batteries are fitted in the correct manner.
Charger
Ensure that you use the correct charger. The part number is KMCU450/US.
An in-vehicle adapter can be used to top up the analyzer's batteries from a 12 volt vehicle
battery. The part number is KMCU450/ 12.
Trickle Charging : On first charging, charge for at least 12 hours continuously,
subsequently charge overnight for approx. 8 hours.
Fast Charging : With the analyzer switched on connect the charger and then switch the
analyzer off. The display will then show "BATTERY CHARGING".
Battery Disposal
Always dispose of depleted batteries using approved disposal methods that protect the
environment.

1207A manual Page 7
3. BEFORE USING THE ANALYZER EVERY TIME:
Check the water trap is empty and the particle filter is not dirty:
- To empty water trap, unplug its’ rubber stopper and re-plug once it is empty.
- To change the filter, remove protective rubber sleeve, pull out the water trap unit from
the analyzer, remove the water trap’s particle filter from its’ spigot and replace.
Reconnect the water trap and rubber protective sleeve.
Connect the flue probe into the bottom of the analyzer’s water trap and connect the probe’s
temperature plug to the socket next to the water trap – check the plug’s orientation is correct
otherwise incorrect temperature measurements will occur.
After switch on, check fuel source, date and time are correct and battery power is sufficient.
SAFETY WARNING
This analyzer extracts combustion gases that may be toxic in relatively low concentrations.
These gases are exhausted from the back of the instrument. This analyzer must only be used
in well-ventilated locations by trained and competent persons after due consideration of
all the potential hazards.
Sensor manufacturers recommend users of portable gas detectors containing electrochemical
sensors conduct a “bump” check before relying on the unit to verify an atmosphere is free
from hazard.
A “bump” test is a means of verifying that an instrument is working within acceptable limits
by briefly exposing to a known gas mixture formulated to change the output of all the sensors
present. (This is different from a calibration where the instrument is also exposed to a known
gas mixture but is allowed to settle to a steady figure and the reading adjusted to the stated gas
concentration of the test gas.)
For Oxygen monitors a level of confidence that the unit is working adequately may be gained
by exhaling over the sensor inlet and viewing the reduction in reading obtained.

1207A manual Page 8
4. USING THE ANALYZER AND ITS FOUR BUTTONS:
Switching ON
the Analyzer
Press to switch the unit ON in fresh air outside the property about
to be tested. This lets the analyzer auto calibrate its’ sensors properly.
On switch on, the analyzer beeps four times and displays the fuel
previously selected, the date and time and model number. Its’ bottom line
counts down from 60 until the sensors are ready to use – This normally
takes 20 - 30 seconds but may take longer as sensors get older. If the
analyzer will not auto calibrate, its’ sensors need to be replaced or
recalibrated by an authorized repair center.
If the inlet probe is connected to the analyzer during its’ countdown the
measured temperature from the inlet probe will be used as the inlet
temperature.
If the inlet probe is not connected and you connect the flue probe’s
temperature plug to the analyzer during countdown the measured
temperature from the flue probe will be used as the inlet temperature.
If neither probe is connected during countdown the analyzer’s internal
ambient temperature will be used as the inlet temperature.
Switching OFF
the Analyzer
Press to switch the analyzer OFF. The display counts down from
30 with the pump on to clean the sensors with fresh air – If the probe is
still connected, make sure analyzer and probe are in fresh air.
Press / if you want to stop the countdown and return to
making measurements.
Note: the analyzer will not switch off until the CO reading is below
20 ppm.
Using UP /
DOWN /
ENTER Buttons
Use the / / keys to change settings (such as time, date
and fuel) when the rotary dial is turned to MENU.
Printing Data Press and quickly release the key to start the analyzer printing. The
analyzer displays "PRINTING" until this is completed. Press and release
the key again to abort printing.
Make sure the printer is switched on, ready to accept data and its’ infrared
receiver is in line with the analyzer’s emitter (on top of the analyzer).

1207A manual Page 9
Backlight
Press and hold to toggle the display's backlight.
Note: use of the backlight increases the current drain on the batteries.
Tasklight Comes on with the display's backlight... see above.
Switching
PUMP on / off
The analyzer normally operates with the pump on. Press quickly
to switch the pump off and on.
When the pump is switched off, the analyzer displays "PUMP OFF"
approx every 30 seconds.
NOTE: the pump will not switch off if the CO reading is above
20 ppm. This helps to protect the CO sensor from damage.
NOTE: the pump cannot be switched off with the rotor set to
-----------MENU.
Zeroing the
pressure sensor
Press and hold the key until the top line display shows ZERO
CAL.
“Freezing” the
display
Press and hold the / key until a second beep is heard to
freeze all readings. The display flashes and readings can be printed by
pressing key. Press and hold the / key again until a
second beep is heard to go back to “live” measurements.
The function is inhibited when the display LEDs are flashing.
Storing a set of
readings
Press and hold the /key for approx. 4 seconds.
Note: this STORE function is inhibited if the display LEDs are flashing.
Note: this STORE function is inhibited in normal operation if the pump is
switched off.
Changing the
display's active
line
Press and release the /key until the illuminated LEDs point at
the display line that you wish to change. While the LEDs are flashing
turn the rotary dial to display the parameter that you want. If the rotary
dial is not turned the active line will go back to its previous setting after
approx. 5 secs.

1207A manual Page 10
5. USING THE DWYER 1207A AS A THERMOMETER OR
PRESSURE METER
With the analyzer switched off, press and hold down the button and then press and
release the button, then release the button.
The DWYER 1207A will now operate as a fixed display pressure meter/thermometer with the
pump off and inhibited.
The display will show: pressure
fluetemp
inlet temp
differential temp
The rotary dial display indications will now be locked apart from MENU. Readings can be
held and logged in the normal way. Up to 8 sets of readings can be logged.
Exit this mode by switching the DWYER 1207A off.
The standard printout for this mode is as follows:
DWYER 1207A 1.0
Serial No. 123456789
DATE 11/01/09
TIME 09:53:23
..............................................
PRS INWG 0.001
T1 48
T2 15
∆T 33

1207A manual Page 11
6. USING THE ROTARY DIAL (starting from Menu):
Rotating the dial selects the displayed parameter, unless MENU is selected or the
pressure/temperature mode has been selected.
ROTARY DIAL POSITIONS
MENU Switches to MENU function.
BAT Displays estimated battery life.
If battery voltage falls below a pre-set limit, the display flashes
"LOW BAT" every 10 seconds. See Page 6 to change the batteries
or re-charge, if applicable.
TIME Displays Time.
LOSS Displays calculated losses when O
2
values are less than 18%.
CO/CO
2
ratio Measured CO divided by calculated CO
2
when O
2
values are less
than 18%
.
CO
2
Displays calculated Carbon Dioxide values once O
2
values are
below 18%.
O
2
Displays Oxygen values in %.
T inlet Displays the inlet probe temperature.
T Flue Displays flue probe temperature.
If the flue probe’s temperature sensor is broken or open circuit it
displays - OC -.

1207A manual Page 12
T Nett Displays the difference between flue and inlet / ambient
temperatures.
If the flue probe’s temperature sensor is broken or open circuit it
displays - OC -.
CO Displays Carbon Monoxide values in PPM as CO
in ppm normalized ac COn
Display value in mg/m
3
as COm
in mg/m3 normalized as COĦ
NO
(if fitted)
Displays Nitric Oxide values in PPM as NO
in ppm normalized as NOn
Display value in mg/m
3
as NOm
in mg/m3 normalized as NOĦ
PRS Display the measured pressure or draft value in user selected units.
X AIR Displays calculated excess air when O
2
values are less than 18%.
EFF Displays calculated efficiency when O
2
values are less than 18%
EFFn, EFFg or EFFc as selected by the user.
AUX Addition user selectable displays.
Rotate the dial to MENU and use the or buttons to select the following function
for change:
When you have selected the function to change, press to select.
Repeat this to scroll through the menu and select (using the key) and change (using the
/ keys) the function.
The final, logical returns you to the main menu display.
To exit the Menu function you can normally rotate the dial to another position - Unless the
final logical is pressed, no changes are made.

1207A manual Page 13
The exception is:
STORE DELETE where the key must be pressed to confirm the
change and exit. If you rotate the dial before pressing the
instrument will beep continuously. You must rotate the dial back to
MENU and press before you can continue.
In STORE View mode the rotary dial is used to select the saved parameter to be displayed.
Use the /keys to change the Test number. To exit the View mode press .

1207A manual Page 14
7. MAIN MENU FUNCTIONS
There are six menu headings each with its own sub-menu
SETUP Fuel selection
Efficiency calculation
Time and date setting
Temperature unit
Gas units
Oxygen referencing
Language
Exit
PRESSURE Smoothing
Resolve (number of decimal points resolution)
Number of decimal points resolution
Units
Time
Exit
STORE View
Auto store
Delete
Exit
REPORTS Pressure
Temperature
Room CO
Draught
Exit
SCREEN Contrast
Auxiliary display
Header
Exit
SERVICE Password protected

1207A manual Page 15
SETUP
SET FUEL NATU GAS
L OIL
PROPANE
BUTANE
L.P.G.
PELLETS
Set fuel type
N < -C- > G N
C
G
Nett
Condensing
Gross efficiency calculation
SET TIME xx: yy: zz
HH: MM: SS
Set time values
SET DATE MM- DD- YY
DD- MM- YY
YY- MM- DD
Choose date format then set date
values
C <---> F F
C
Fahrenheit
Centigrade
PPM < - > MG ppm
MG/M3
Parts per million
Milligrams per cubic meter
O2 REF NO
YES
Set reference value
LANGUAGE English
French
Italian
German
Spanish
Dutch
Swedish
Set language

1207A manual Page 16
PRESSURE
SMOOTH OFF
ON
Select smoothing
POINTS LOW
HIGH
Select decimal point resolution
PS UNITS inH2O
mBAR
mmH2O
Pa
kPa
PSI
mmHg
hPa
Select pressure units
STORE up to 255 sets of combustion test results can be stored
VIEW TEST xxx Enter test number to be viewed then
use rotary dial to select display.
If less than 9 set of readings are stored
rotate the dial then use the up/down
buttons to change the LOG number.
AUTO STO YES/NO If YES set logging time interval in
minutes.
DEL ALL YES/NO Clears stored values.
REPORT
There are dedicated report formats for the following tests:
Pressure
Temperature
Room CO
Draught
All report menus follow the format TEST / VIEW / DEL ALL.
The TEST functions are described later.

1207A manual Page 17
SCREEN
CONTRAST SET xx Lighten or darken the display
AUX
Selected Fuel
Pressure units
COM
Date
CO air free
O
2
Reference value
Assign the AUX rotary dial position
HEADER Header 1
Header 2
2 lines each of 20 characters

1207A manual Page 18
8. MEASURING MODES
MEASURING FLUE GASES
After the countdown is finished and the analyzer is correctly set up, put its’ flue probe into the
appliance’s sampling point. The ideal sampling point is at least two flue diameters
downstream of any bend.
Put the probe tip in the flue center. With balanced flues, make sure the probe is positioned far
enough into the flue so no air can ‘back flush’ into the probe.
Use the probe’s depth stop cone to fix it in flue diameters from
1
/
4
to
4
/
5
inch, 6 to 21 mm. Its
maximum operating temperature is 1112°F / 600°C.
Make sure you do not exceed the analyzer’s operating specifications. In particular:
•Do not exceed the flue probe’s maximum temperature
•Do not exceed the analyzer’s internal temperature operating range
•Do not put the analyzer on a hot surface
•Do not exceed the water trap’s levels
•Do not let the analyzer’s particle filter become dirty and blocked
View the displayed data to ensure that stable operating conditions have been achieved and the
readings are within the expected range.
Press PRINT or press HOLD first to “freeze” or store the readings before printing.

1207A manual Page 19
STANDARD COMBUSTION PRINTOUT
DWYER 1207A 1.0 /product code
Serial No. 123456789 /serial number
/userheader1
/user header 2
DATE 11/01/09
TIME 09:53:23
..............................................
FUEL NATU GAS
O2 % 5.1
CO2 % 9.0
CO ppm 400
NO ppm n/f /NO sensor not fitted
FLUE
o
F 48
INLT
o
F 15
NETT
o
F 33
EFF (C) 102.1 /condensing efficiency
PRS INWG 0.001
Losses % -2.1
XAIR % 32.1
CO/CO2 0.0044
PI 0.44
O2 ref % 0.0
SMOKE......................................
....................................................