
Contents
Test Equipment Depot - 800.517.8431 - 5 Commonwealth Ave, MA 01801
TestEquipmentDepot.com
Safety Information. . . . . . 4
ning and Caution
War
Description . . . . . . . . 6
eatures
F
What’s Included
T45 Hardware
CA
Common S
Operation. . . . . . . . . 12
SensorVault™ Technology
Inline
ery Charging
Batt
Powering ON
wering OFF
Po
Storage
Job Menu . . . . . . . . . 14
Combustion
Ambien
Drafts
Primary Air
Smoke
ampling Points
Water Trap
t CO
Customer . . . . . . . . . 19
e
Not
Report
Save and Exit
Job Archive
Settings
Main
General
Dust Filter Replacement
Sensor Replacement
alibration
C
Specications . . . . . . . 28
Sensors
Test Parameters
Limited Warranty . . . . . . 32
Sensor W
Obtaining Service
. . . . . . . . . 22
tenance.
. . . . . . . 24
arranty
32

Safety Information
Only qualified personnel trained in service
and installation of electric heaters, boilers, and
furnaces shall use this combustion analyzer.
This devic
parameters of combustion equipment including
oxygen, carbon monoxide, temperature, carbon
dioxide, eciency, and draft pressure
R
ead and understand this operator’s manual
in its entirety before using to prevent injury
or damage to you or the equipment. A
any job, appropriate use of personal protective
equipment (PPE) is required
e measures and analyzes key
.
s with
.
WARNING
• Do not use the analyzer as a safety device.
• Always be aware of and test for ambient CO levels.
• Do not use unless in a well-ventilated location.
• Do not use in areas classied as hazardous locations; not
intrinsically safe.
• Do not use unless a visual inspection ensures it’s safe to do so.
• Ensure any connections to fuel sources are leak-free.
• Do not touch or store probe until it cools to ambient
temperature.
• Condensate may be acidic.
• Combustion gases may be toxic even in low concentrations.
• Seal any equipment holes used during testing in order to
prevent dangerous ue gas entering the space.
CAUTION
• Do not use or store near solvents.
• Do not clean with solvents.
• Do not use on a continuous basis.
• Refer to 3rd party smoke test documentation to verify if smoke
in equipment is at a safe level (1 or less). Not verifying this prior
to conducting other tests, such as combustion, can result in
damage of the analyzer and produce incorrect measurements.
• This device should only be opened and/or serviced by
authorized personnel. Gas sensors may be replaced by user.
• Do not disconnect combustion probe cable when powered on.
• Use only within operating environment specication.
• Do not use in the rain or wet environments.
54

Description
The Fieldpiece CAT45 Combustion Analyzer
provides a hassle-free solution for technicians to
get the job done quickly, easily, and safely while
improving system eciency
A
ccurate sensors of O2, CO, pressure, and
temperature along with powerful trending,
provide key insight into equipment performance
S
ensorVault™ technology seals to prolong sensor
life.
.
Features
• 4 Year Gas Sensor Warranty
Lar
•
ge Intuitive Touchscreen
• Powerful Trending
• SensorVault™ Technology
• Inline Water Trap
• Rechargeable Battery
I
n-use USB-C Charging
.
•
• Field Replaceable Smart Sensors
• Job Link® System App Compatible
• Wireless Printer (CATPR) Compatible
• Durable Hard Lined Case
What’s Included
• Combustion Analyzer + Probe
• Hard Lined Carrying Case
• Extra Dust Filters and O-rings
• USB-C Charging Cable
• Operator’s Manual
• 1 Year Device Warranty
• 4 Year Sensor Warranty
76

Sensing Point
(Flue Gas Inlet, Temperature Sensor, Probe Pressure)
CAT45
(4) Magnetic
Mounts
Click Power Button
(SensorVault™ Technology)
Threaded
Probe Cone
Lock
Touchscreen LCD
Hardware
O-ring
Filter
Filter Cap
(1/4 turn)
Gas Sensor Cover
(2) 2.5mm Hex Sockets
USB-C
Charging
Port
Inline
Water
Tra p
Permanent Probe Connection
Flue Gas
Exhaust
98

Common Sampling Points
The many types of combustion equipment vary
in their design and therefore their ideal sampling
points. However, there are commonalities that
make for useful guidelines when analyzing
performance.
Heed equipment manufacturer instructions
above anything mentioned in this manual.
• Before inserting the probe in the ue, it’s good
practice to test for excessive soot which may
lead to carbon buildup within the analyzer or
overexpose sensors.
• Use the probe cone lock to hold the
probe tightly in place at the sampling
point.
SP
SP
Power Burner
(Induced Draft)
Tankless Water Heater
SP
High Eciency
(Condensing) Furnace
• The center of the ue is often a
good place to locate the sensing
point of the probe, but locating
at the highest point of CO is best.
SP
Sample Point
Flue Gas Direction
Power Burner
(Induced Draft)
Furnace
Atmospheric
(Natural Draft)
Water Heater
SP
SP
(Natural Draft) Furnace
Atmospheric
1110