Dwyer Instruments 1207A Operating Manual

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

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

13. ELECTROMAGNETIC COMPATIBILITY 30

(NOTE MAY BE SUBJECT TO CHANGE

) 28-29

APPENDIX 1 – MAIN PARAMETERS 31-32

1207A manual Page 2

DWYER 1207A

User Guide

The DWYER 1207A Combustion Analyzer measures O
temperature, differential pressure and CO.

It calculates efficiency (Nett, Gross or Condensing), losses, the CO/CO
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

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

3

.

differential

2,

ratio,

2

“freeze”/ hold data. The buttons with
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 3

, and arrows also change

1. ANALYZER FEATURES AND KEYPAD

ON / OFF

Turns the analyzer ON / OFF

PRINT / BACKLIGHT

Press to print “live” or “frozen”
data. Press again to abort.
Press for 2+ seconds to switch
backlight & torch ON / OFF

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PUMP / CAL PRESSURE

Turns the pump ON / OFF
Press for 2+ seconds to zero the
pressure sensor

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”

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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

subsequently charge overnight for approx. 8 hours.

Fast Charging

analyzer off. The display will then show "BATTERY CHARGING".

Battery Disposal

Always dispose of depleted batteries using approved disposal methods that protect the
environment.

: On first charging, charge for at least 12 hours continuously,

: With the analyzer switched on connect the charger and then switch the

1207A manual Page 6

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 7

4. USING THE ANALYZER AND ITS FOUR BUTTONS:

Switching ON
the Analyzer

Switching OFF
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.

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

Printing Data

1207A manual Page 8

Use the / / keys to change settings (such as time, date
and fuel) when the rotary dial is turned to MENU.

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).

Backlight

Tasklight

Switching
PUMP on / off

Zeroing the
pressure sensor

“Freezing” the
display

Press and hold to toggle the display's backlight.

Note: use of the backlight increases the current drain on the batteries.

Comes on with the display's backlight... see above.

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.

Press and hold the key until the top line display shows ZERO
CAL.

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

Note: this STORE function is inhibited if the display LEDs are flashing.

/ key for approx. 4 seconds.

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
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

/ key until the illuminated LEDs point at

approx. 5 secs.

1207A manual Page 9

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
flue temp
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 10