Bacharach PUR-CHEK PRO User manual

Product Leadership •Training •Service • Reliability
Operation and Maintenance
Instruction Manual 2100-9001
Rev. 3 – June 2014

Operation and Maintenance Instruction Manual
ii P/N 2100-9001 Rev 3
WARRANTY
Bacharach, Inc. warrants to Buyer that at the time of delivery this Product will be free from defects in
material and manufacture and will conform substantially to Bacharach Inc.’s applicable specifications.
Bacharach’s liability and Buyer’s remedy under this warranty are limited to the repair or replacement, at
Bacharach’s option, of this Product or parts thereof returned to Seller at the factory of manufacture and
shown to Bacharach Inc.’s reasonable satisfaction to have been defective; provided that written notice of
the defect shall have been given by Buyer to Bacharach Inc. within one (1) year after the date of delivery
of this Product by Bacharach, Inc.
Bacharach, Inc. warrants to Buyer that it will convey good title to this Product. Bacharach’s liability and
Buyer’s remedy under this warranty of title are limited to the removal of any title defects or, at the election
of Bacharach, to the replacement of this Product or parts thereof that are defective in title.
The warranty set forth in paragraph 1 does not apply to parts the Operating Instructions designate as
having a limited shelf-life or as being expended in normal use (e.g., filters).
THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE GIVEN AND ACCEPTED IN LIEU OF (I)
ANY AND ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE: AND (II) ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY IN CONTRACT OR
TORT, WHETHER OR NOT ARISING FROM BACHARACH’S NEGLIGENCE, ACTUAL OR IMPLIED.
The remedies of the Buyer shall be limited to those provided herein to the exclusion of any and all other
remedies including, without limitation incidental or consequential damages. No agreement varying or
extending the foregoing warranties, remedies or this limitation will be binding upon Bacharach, Inc. unless
in writing, signed by a duly authorized officer of Bacharach.
Register Your Warranty by Visiting
www.mybacharach.com
NOTICE
Product improvements and enhancements are continuous; therefore the specifications and information
contained in this document may change without notice.
Bacharach, Inc. shall not be liable for errors contained herein or for incidental or consequential damages
in connection with the furnishing, performance, or use of this material.
No part of this document may be photocopied, reproduced, or translated to another language without the
prior written consent of Bacharach, Inc.
Copyright © 2014, Bacharach, Inc., all rights reserved.
BACHARACH® is a registered trademark of Bacharach, Inc. All other trademarks, trade names, service
marks and logos referenced herein belong to their respective owners.

Operation and Maintenance Instruction Manual
P/N 2100-9001 Rev 3 iii
Table of Contents
1. Introduction ...................................................................................................................................... 1
1.1. How to Use This Manual ........................................................................................................ 1
1.2. Conventions Used in This Manual ......................................................................................... 1
1.3. Analyzer-Specific Warnings ................................................................................................... 1
1.4. General Warnings and Cautions ............................................................................................ 2
1.5. Features and Capabilities....................................................................................................... 2
1.6. Kit Contents and Reorder Part Numbers ............................................................................... 3
1.7. Functional Overview............................................................................................................... 3
2. Specifications ................................................................................................................................... 4
3. Components ..................................................................................................................................... 5
3.1. Base Unit ................................................................................................................................ 5
3.2. Low Side Vapor Sample Hose ............................................................................................... 5
3.3. High Side Liquid Sample Hose .............................................................................................. 5
3.4. Control Panel.......................................................................................................................... 6
3.5. AC Power Adapter.................................................................................................................. 6
3.6. Back Panel Connections ........................................................................................................ 7
3.7. Hard Shell Storage/Carrying Case......................................................................................... 7
4. Operation .......................................................................................................................................... 8
4.1. First Use ................................................................................................................................. 8
4.2. Turning On the Unit ................................................................................................................ 8
4.3. Calibration .............................................................................................................................. 8
4.4. Vapor Sampling...................................................................................................................... 9
4.5. Liquid Sampling.................................................................................................................... 10
4.6. Viewing the Test Results...................................................................................................... 10
4.7. Contaminated Refrigerants .................................................................................................. 10
4.8. Pure Refrigerants ................................................................................................................. 11
4.9. Pure Blends with Incorrect Component Ratios .................................................................... 12
4.10. Measuring Air ....................................................................................................................... 12
4.11. Printing the Test Results and Channel Data ........................................................................ 13
4.12. Channel Data Modeling........................................................................................................ 14
5. Maintenance and Troubleshooting............................................................................................... 15
5.1. Setting the LCD Contrast ..................................................................................................... 15
5.2. Changing the White Plastic Sample Filter............................................................................ 15
5.3. Replacing the Sample Hose................................................................................................. 16
5.4. Changing the Printer Paper.................................................................................................. 16
5.5. Software Updates................................................................................................................. 17
5.6. Low Battery Warning ............................................................................................................ 17
5.7. Air Sensor Low ..................................................................................................................... 18
5.8. Error Messages .................................................................................................................... 18
6. Service Centers .............................................................................................................................. 19

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List of Figures
Figure 3-1. Base Unit Showing Key Components...................................................................................... 5
Figure 3-2. Low Side Vapor Sample Hose................................................................................................. 5
Figure 3-3. High Side Sample Hose Configuration .................................................................................... 6
Figure 3-4. Control Panel Showing Key Components................................................................................ 6
Figure 3-5. AC Power Adapter (Cord and Converter) ................................................................................ 6
Figure 3-6. Back Panel Connectors ........................................................................................................... 7
Figure 3-7. Hard Shell Storage/Carrying Case .......................................................................................... 7
Figure 4-1. Sample Screens Showing Typical Start-up Sequence ............................................................ 8
Figure 4-2. Sample Screens Showing Initiation and Progress of Calibration Testing ............................... 9
Figure 4-3. Sample Gas Testing Screens .................................................................................................. 9
Figure 4-4. Screens Showing Sample Test Results................................................................................. 10
Figure 4-5. Test Results for Contaminated Blend Refrigerants ............................................................... 11
Figure 4-6. Sample R12 Test Screen Showing “Purity Unknown” Message ........................................... 11
Figure 4-7. Sample Test Results for Pure Blend Refrigerant with Correct Component Ratios ............... 12
Figure 4-8. Sample Test Results for Pure Blend Refrigerant with Incorrect Component Ratios ............. 12
Figure 4-9. Sample Test Results for Air Measurements .......................................................................... 12
Figure 4-10. Sample Printing Results and Printing Components Screens ................................................ 13
Figure 4-11. Samples of Printed Test Results ........................................................................................... 13
Figure 4-12. Samples of Test Results Showing Channel Data Printout .................................................... 14
Figure 5-1. Sample Screens Used in Setting LCD Contrast .................................................................... 15
Figure 5-2. Screens Used in Changing Printer Paper.............................................................................. 16
Figure 5-3. How to Change Printer Paper ................................................................................................ 17
Figure 5-4. Sample Screen Showing Low Battery Warning ..................................................................... 17
Figure 5-5. Sample Screen Showing Air Sensor Low Message .............................................................. 18
List of Tables
Table 1-1. Pur•ChekPro Kit Part Number.............................................................................................. 3
Table 1-2. Pur•ChekPro Kit Replacement Part Numbers ..................................................................... 3
Table 2-1. Specifications ........................................................................................................................... 4

Operation and Maintenance Instruction Manual
P/N 2100-9001 Rev 3 1
1. Introduction
1.1. How to Use This Manual
This manual provides important information on how to operate and maintain Bacharach’s Pur•Chek™Pro
HVAC Diagnostic Refrigerant Analyzer. To assure operator safety and proper use of the Pur•Chek™Pro,
please read, understand, and follow the contents of this manual.
1.2. Conventions Used in This Manual
When used in this manual or as labeled on the Pur•Chek™ Pro, the following hazard symbols and/or
associated words are defined as follows.
WARNING: This symbol and/or the use of the word WARNING indicates a potential hazard
associated with the use of this equipment. It calls attention to a procedure, practice,
condition, or the like, which if not correctly performed or adhered to, could result in death or
serious injury.
WARNING: This symbol and/or the use of the word WARNING indicates a potential hazard
from electrical shock. It calls attention to a procedure, practice, condition, or the like, which if
not correctly performed or adhered to, could result in death or serious injury.
CAUTION: This symbol and/or the use of the word CAUTION indicates a potential hazard
associated with the use of this equipment. It calls attention to a procedure, practice,
condition, or the like, which if not correctly performed or adhered to, could result in minor or
moderate injury.
IMPORTANT: The use of the word IMPORTANT in this manual calls attention to a
procedure, practice, or condition which if not correctly performed or adhered to, could result
in incorrect performance of or damage to the equipment and may void the warranty.
NOTE: The use of the word NOTE in this manual is used to emphasize a procedure,
practice, or condition.
1.3. Analyzer-Specific Warnings
Refrigerant Blend Warning: The HVAC industry is continually introducing new refrigerants.
Many of these new blends can be profiled using the Pur•Chek™ Pro.
Sample Filter Warning: Replace the sample filter of the instrument AS SOON AS RED
SPOTS OR DISCOLORATION BEGINS TO APPEAR ON THE OUTSIDE DIAMETER OF
THE WHITE ELEMENT. Failure to properly maintain and replace the sample filter will result
in severe damage or inaccurate results.
Sample Input Warning:
The instrument includes sampling options. One for High Side
Liquid sampling and one for Low Side Vapor Sampling. Failure to use the correct hose
configuration on the proper sample port may result in incorrect readings and/or damage to
the instrument. DO NOT attempt to introduce liquid or samples heavily laden with oil into the
low side sampling hose configuration. Damage caused to the instrument due to the use of
the wrong hose configuration on the wrong port will void the warranty.
Battery Charger Warning: When charging the battery with the charger, the charger will
become warm. If the charger becomes hot, unplug the charger immediately! When charging
multiple battery packs, allow the charger to cool between each battery.

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1.4. General Warnings and Cautions
•ALWAYS wear eye and skin protection when working with refrigerants. Escaping
refrigerant vapors will present a freezing danger.
•ALWAYS turn the compressor off before connecting the instrument to an air
conditioning system.
•ALWAYS inspect the sample hose before each use. Replace the hose if it appears
cracked, frayed, obstructed or fouled with oil.
•DO NOT direct refrigerant vapors venting from hoses towards the skin.
•DO NOT disassemble the instrument. There are no serviceable components internal
to the instrument and disassembly will void the warranty.
•ALWAYS place the analyzer on a flat and sturdy surface.
•To reduce the risk of electrical shock, DO NOT disassemble the instrument; do not use
the instrument in wet or damp areas.
•Some systems may contain hydrocarbons or flammable refrigerants. This analyzer is
designed with sealed heat sources and without sparking components. ALWAYS
ensure adequate ventilation and ALWAYS take proper precautions when working with
refrigerants.
•DO NOT breathe refrigerant and lubricant vapor or mist. Exposure may irritate eyes,
nose, and throat. If accidental system discharge occurs, immediately ventilate the work
area.
•DO NOT utilize any other hose other than those supplied with the instrument. The use
of other hose types will introduce errors into the refrigerant analysis and instrument
calibration.
•ALWAYS verify that the refrigerant to be tested from the Low Side does not contain or
will not emit heavy loads of oil or liquid.
•DO NOT expose unit or external components to rain or moisture. Protect the unit by
keeping it in the storage case when not in use.
•NEVER admit any sample into the instrument at pressures in excess of 500 psig.
•NEVER obstruct the air intake, sample exhaust, or case vent ports of the instrument
during use.
1.5. Features and Capabilities
The Pur•Chek™ Pro HVAC Diagnostic Refrigerant Analyzer is the most advanced portable instrument
ever manufactured for determining the purity of gaseous refrigerants for the HVAC-R market. Features of
the Pur•Chek™ Pro include the following.
•Identification of more than 12 refrigerants with a
single IR detector
•Large graphic display with on-screen
instructions
•Internal, rechargeable Lithium Iron Phosphate
battery for cordless operation in any location
•USB port for remote software updates
•Advanced ergonomic design
•Rugged rubberized hand grips
•Fast test time
•Built-in printer for instant analysis
report
•Vapor or liquid sampling ability
•Hard shell carry/storage case

Operation and Maintenance Instruction Manual
P/N 2100-9001 Rev 3 3
1.6. Kit Contents and Reorder Part Numbers
The Pur•ChekPro kit contains the individual parts listed below.
•Pur•Chek™ Pro with internal rechargeable battery (available only through kit 2100-8003)
•Hard shell storage/carrying case
•1/4” flare vapor sampling hose
•1/4” flare liquid sampling assembly
•AC adapter/charger
•Printer paper (1 roll)
•Instruction manual
•Spare sample hose filter
The Pur•ChekPro kit is contained in a hard shell storage/carrying case. Note that some kit components
are available for individual reorders.
Table 1-1. Pur•ChekPro Kit Part Number
Part Number Description
2100-8003 Pur•ChekPro Kit
Table 1-2. Pur•ChekPro Kit Replacement Part Numbers
Part Number Contents of Pur•ChekPro Kit (P/N: 2100-8003)
N/A Pur•Chek™ Pro (available only through kit 2100-8003)
N/A Hard shell storage/carrying case (available only through kit 2100-8003)
2100-9001 Instruction manual
2100-0003 Printer paper (1 roll)
2100-0004 AC power adapter
2100-0006 White plastic sample filter
2100-0008 1/4” flare low-pressure vapor sampling hose
2100-0009 1/4” flare high-pressure liquid sampling hose and trap assembly
2100-0010 Spare low pressure sample hose filter/restrictor
1.7. Functional Overview
Contamination of refrigerants either in storage cylinders or air conditioning systems can lead to
component corrosion, elevated head pressures, and system failures when used by unsuspecting
technicians. The ability of the technician to determine refrigerant type and purity is severely hampered by
the presence of air when attempting to use temperature-pressure relationships. The development of
various substitute refrigerants further complicates the ability of a technician to identify refrigerant purity
based on temperature-pressure relationships. The substitute refrigerant blends can also introduce a
flammability hazard to the technician and the ultimate end user of the air conditioning system.
The Bacharach Pur•Chek™ Pro HVAC diagnostic refrigerant analyzer provides a fast, easy, and accurate
means to determine refrigerant purity in refrigerant storage cylinders or directly in air conditioning
systems. The instrument utilizes non-dispersive infrared (NDIR) technology to determine the weight
concentrations of multiple refrigerant types. Refrigerant purity is displayed on the LCD screen. Users must
determine acceptable levels of purity based on their use or recovery standards.
Sample gas is admitted into the instrument through one of the two supplied sampling hose configurations
and presented to the sensing device. The instrument provides the user with direct percent-by-weight
concentrations.

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The instrument’s user interface consists of an LCD graphic display, status indicator lamps, push-button
communication switches. Alarm indicators provide alerts of instrument fault conditions. Direct percent-by-
weight concentrations of the sample refrigerant are provided on the display, which also provides user
directions and prompts. A built-in printer is provided to print an on-the-spot analysis report.
The Bacharach Pur•Chek™ Pro provides the refrigerant technician with:
•refrigerant type
•refrigerant purity
•refrigerant contamination information.
2. Specifications
Table 2-1. Specifications
Category Description
Sample Parameters Vapor or liquid, oil-free, 500 psig maximum
Identified Refrigerants
R12, R32, R408A, R409A, R417A*, R421A*
, R421B, R422A, R422B,
R422C, R427A, HC (Hydrocarbons)
* Due to similar formulas, R417A and R421A may be identified as either R417A or R421A.
Identified and Analyzed
Refrigerants R134a, R22, R404A, R407C, R410A, HC (Hydrocarbons)
Sensor Technology Non-Dispersive Infrared (NDIR)
Refrigerant Sample Size 0.3 ounces (8.5 grams) per sample
Power
External Power Supply Input: 90-264VAC, 50-60 Hz
Output: 12 VDC, 2.0 A
Built-in Lithium Iron
Phosphate Battery Output: 2100 mAh
Environmental
Conditions
Humidity: 0 to 95% RH non-condensing.
Protect the unit by keeping it in the storage case when not in use.
Do not expose unit or external components to rain or moisture.
Operational
Temperature 50-120°F (10-49°C)

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P/N 2100-9001 Rev 3 5
3. Components
3.1. Base Unit
The Pur•Chek™ Pro base unit (shown in Figure 3-1) houses the graphic display, infrared bench, internal
battery, electrical connections, and printer module. These components require no maintenance.
IMPORTANT:There are no serviceable
components internal to the instrument, and
disassembly will void the warranty.
Figure 3-1. Base Unit Showing Key Components
3.2. Low Side Vapor Sample Hose
The 6.5 foot (2 meter) low side vapor sample hose configuration is constructed of a polyurethane tube.
See Figure 3-2. A brass flow restrictor acts to reduce pressure at the sample connection point and
reduce the introduction of harmful oil into the machine. The maximum inlet pressure is 500 psig. The hose
is provided with an instrument inlet port mating connector on one end and a 1/4” SAE female flare
coupling nut on the service end.
Figure 3-2. Low Side Vapor Sample Hose
3.3. High Side Liquid Sample Hose
The 6.5 foot (2 meter) high side sample hose configuration is constructed of a polyurethane tube with an
oil reservoir. A brass flow restrictor acts to transform liquid refrigerant to vapor at the sample connection
point while the oil trap syringe collects oil and provides a means of expulsion after the test is complete.
The maximum pressure is 500 psig. The syringe is provided with a magnet for attaching it to the tank. It
also is provided with an instrument inlet port mating connector on one end and a 1/4″SAE female flare
coupling nut on the service end. Refer to Figure 3-3.
Analyzer End
Service End
(1/4
″
SAE
Flare Nut)

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6 P/N 2100-9001 Rev 3
Figure 3-3. High Side Sample Hose Configuration
NOTE:The analyzer will indicate “Non-Condensable” or “Unknown Refrigerant” if the analyzer
does not receive a good sample due to obstructed flow or lack of flow. If this occurs the Brass
Sample Hose Restrictor may need to be replaced.
3.4. Control Panel
The control panel serves as the main user interface. The control panel features three soft key buttons that
change their function as the instrument changes modes. The current function for each button is displayed
by the soft key label at the bottom of the graphic display. Red and green LEDs at the top of the control
panel are used for visual status indications. Refer to Figure 3-4. This is the
Figure 3-4. Control Panel Showing Key Components
3.5. AC Power Adapter
The Pur•Chek™ Pro is powered via a pre-
installed Lithium Iron Phosphate battery. You
can also power the unit via the 90-264 VAC,
50-
60 Hz power transformer. This
transformer is included with each unit and
converts a standard 100-
240VAC 50/60Hz
wall outlet to 12VDC, 2.0A, which powers the
device. This AC Power Adapter will also
charge the battery when connected to the
analyzer.
Figure 3-5. AC Power Adapter (Cord and Converter)
NOTE:Use of any other power source may cause damage to the unit and void the
warranty.
Service End
(1/4” SAE
Flare Nut)
Analyzer End
Graphic
Display
Brass
Restrictor
Sample Hose
High Pressure
Liquid Sample Trap

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3.6. Back Panel Connections
The connections located on the back panel are illustrated below in Figure 3-6.
CAUTION: The sample outlet port should never be obstructed. Keep the sample outlet port
free and clear at all times. Do not operate near open flame.
Figure 3-6. Back Panel Connectors
3.7. Hard Shell Storage/Carrying Case
The hard shell storage/carrying case is custom fit to the Pur•Chek™ Pro. It provides rugged protection for
the instrument as well as convenient storage for all components. See Figure 3-7. The enclosure is
general purpose and is not watertight.
Figure 3-7. Hard Shell Storage/Carrying Case

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8 P/N 2100-9001 Rev 3
4. Operation
4.1. First Use
The Pur•Chek™ Pro has a built-in Lithium Iron Phosphate battery. Prior to the first use, charge the
battery for a minimum of 2 hours with the included AC power supply. If a power outlet is accessible you
may also use the AC power supply to power the unit. The analyzer will function and charge the battery
while the AC Power Supply is connected.

NOTE: The Pur•Chek™ Pro can be operated with or without the battery using the supplied AC
adapter.
4.2. Turning On the Unit
Ensure the unit has either battery power (charged battery), or use the AC power adapter. For the latter,
connect the included AC power adapter to the 12 VDC power input jack on the back of the unit (refer to
Figure 3-6 on page 7). Plug in the AC power cord to a 110-240 VAC outlet.
Press the left soft key (the power on/off button). The splash screen shown in Figure 4-1 A will appear for
approximately three seconds followed immediately by the screen in Figure 4-1 B. If you wish to adjust
factory settings press ‘SET’ and refer to Section 5: Maintenance and Troubleshooting on page 15. If you
do not need to adjust the settings, connect the sample hose to the analyzer (Figure 4-1 C) in preparation
for calibration, then wait approximately 30 seconds for the unit to warm up.
(A) (B) (C)
Figure 4-1. Sample Screens Showing Typical Start-up Sequence
4.3. Calibration

NOTE: The supplied sample hose needs to be connected to accomplish proper calibration.
Verify the sampling hose assembly is connected to the analyzer and making sure it is
disconnected from any refrigerant source before calibration.
When you first turn the unit on an Air Calibration will be required; additional air calibrations are only
required periodically. A reminder to perform air calibrate will appear when needed (refer to Figure 4-2 A).
Press ‘CAL’ to calibrate the machine.
When calibrating, the unit will pull fresh air into the sample cell via an internal pump. This fresh air purges
any excess refrigerant and ensures accurate test results. Calibration requires that the sample hose is
disconnected from the refrigerant cylinder or air conditioning system and remains connected to the

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P/N 2100-9001 Rev 3 9
instrument. Figure 4-2 B shows a sample progress screen that is displayed as the Air Calibration is
occurring. Calibration will take approximately 130 seconds.

NOTE: In the unlikely event an ‘Air Calibration Unstable’ message is displayed as shown in
(Figure 4-2 C) verify you are in a ventilate area and there is no gas flowing near the air intake.
Once you have verified both parameters, press ‘RETRY’ to complete another calibration.
(A) (B) (C)
Figure 4-2. Sample Screens Showing Initiation and Progress of Calibration Testing
When the unit has completed a successful Air Calibration, the analyzer is then ready for gas testing. The
unit will display the screen shown in Figure 4-3 A. Determine if you are Vapor Sampling or Liquid
Sampling and make sure the proper hose assembly is connected to complete your required form of
testing. Section 4.4 Vapor Sampling and section 4.5 Liquid Sampling outline proper procedure for both
forms of testing.
Connect the hose to the tank or system, open the valve if connecting to a tank, and then press ‘TEST’.
The Pur•Chek™ Pro will display the screen shown in Figure 4-3 B. Before the test is completed the
screen in Figure 4-3 C will appear to indicate the test is nearly complete
(A) (B) (C)
Figure 4-3. Sample Gas Testing Screens
4.4. Vapor Sampling
Vapor sampling is the most common process used for identifying refrigerants using the Pur•Chek™ Pro.
It is a simple process requiring the operator to take these 4 steps:
1. Connect the vapor sampling hose to the instrument and then to the low side vapor port of the
system or cylinder.
2. Open the low side valve of the cylinder and press TEST (see Figure 4-3 A).
3. When the test is complete, close the low side valve of the cylinder and disconnect the hose from
the cylinder.
4. Disconnect the hose from the Pur•Chek™ Pro for storage.

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4.5. Liquid Sampling
Liquid sampling is an option that is exclusive to the Pur•Chek™ Pro. It permits the user to flash liquid into
vapor for introduction into the analyzer. To use the liquid sampling assembly, follow the steps below.
1. Inspect the high-pressure liquid sampling trap assembly and ensure that the plunger on the oil
trap syringe is completely depressed. Assemble the high side liquid sample hose as shown in
Figure 3-3 on page 6.
2. Connect the appropriate end of the hose to the instrument and the opposite end of the liquid
sampling assembly to the High Side Liquid port of the system or cylinder. Affix the high pressure
liquid sample trap assembly vertically to a tank with the magnet.
3. Open the high side valve of the cylinder. The liquid sample will exit the tank and flash to vapor by
the hose assembly. As the liquid is flashed, the plunger on the high pressure liquid sample trap
assembly will begin to rise and the flashed refrigerant sample will travel into the analyzer.
4. Wait for the plunger on the high pressure liquid sample trap assembly to expand past the outlet
port.
5. Press “Test” on the analyzer (see Figure 4-3 A).
6. Upon completion of the test, close the valve on the cylinder, disconnect the hose from the inlet of
the high pressure liquid sample trap assembly, and depress the plunger to expel any trapped oil.
7. Inspect the hose for signs of oil and replace the brass hose restrictor if necessary.
8. Disconnect the hose from the Pur•Chek™ Pro.

NOTE: Liquid sampling will likely clog the brass sample hose restrictor much faster than vapor
sampling. If the restrictor becomes clogged and the analyzer continuously displays “Non-
Condensable” or “Unknown Refrigerant” readings, you will need to replace the clogged
restrictor with a new one. To avoid oil or liquid contamination from entering the analyzer, have
a designated vapor and liquid brass sample hose restrictor for each form of testing.
4.6. Viewing the Test Results
Upon completion of the test, the Pur•Chek™ Pro will display a screen similar to that shown in
Figure 4-4 A. Pressing the MORE button will display the screen shown in Figure 4-4 B. Once you have
completed your test, press ‘DONE’ to return back to the ‘READY’ screen Figure 4-3 A or refer to section
4.11 Printing the Test Results and Channel Data on page 13.
(A) (B)
Figure 4-4. Screens Showing Sample Test Results
4.7. Contaminated Refrigerants
The Pur•Chek™ Pro includes the ability to detect and analyze the composition of many common R400
Series refrigerants in addition to R134a, R22 and hydrocarbons. In the event that the Pur•Chek™ Pro
determines that the primary refrigerant in the system or cylinder is one of the recognized measurable

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P/N 2100-9001 Rev 3 11
refrigerants, a results screen similar to Figure 4-5 A will be displayed. Pressing the MORE button will
display a detail screen similar to Figure 4-5 B. If the blend or refrigerant mixture is not recognized,
Figure 4-5 C will be displayed. Refer to section 4.11 Printing the Test Results and Channel Data on page
13 to print.
(A) (B) (C)
Figure 4-5. Test Results for Contaminated Blend Refrigerants
4.8. Pure Refrigerants
The Pur•Chek™ Pro has the ability to identify
•R12
the following refrigerants.
•R32
•R408A
•R409A
•R417A
•R421A
•R421B
•R422A
•R422B
•R422C
•R427A
•Hydrocarbons (HC)
All identified
Figure 4-6
refrigerants will show “Purity Unknown” as the analyzer cannot yield additional information
regarding the composition. See . Refer to section 4.11 Printing the Test Results and Channel
Data on page 13 to print. Refer to section 4.12 Channel Data Modeling on page 14 for additional
information regarding identified
refrigerants.
Figure 4-6. Sample R12 Test Screen Showing “Purity Unknown” Message
The instrument can also, identify and analyze the component content of pure:
•R134A
•R22
•HC (hydrocarbons)
•R404A
•R407C
•R410A
Analysis of analyzed pure blend refrigerants will yield additional data regarding the composition of the
refrigerant sample. The Pur•Chek™ Pro will display the blend refrigerant type as shown in Figure 4-7 A.
Pressing the ‘MORE’ button will display the detail screen shown in Figure 4-7 B. Refer to section 4.11
Printing the Test Results and Channel Data on page 13 to print.

NOTE: Hydrocarbons (HC) encompass R600, R600A and R290. The Pur•Chek™ Pro cannot
differentiate between hydrocarbons.

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12 P/N 2100-9001 Rev 3
(A) (B)
Figure 4-7. Sample Test Results for Pure Blend Refrigerant with Correct Component Ratios
4.9. Pure Blends with Incorrect Component Ratios
The Pur•Chek™ Pro has the ability to detect blend ratios that have been altered by contamination. As
stated above, the blends that can be identified and analyzed are as follows.
•R134A
•R22
•HC (hydrocarbons)
•R404A
•R407C
•R410A
If one of the multi-component refrigerant blends has incorrect component ratios, it will be displayed as
shown in Figure 4-8 A. Press MORE To see the component concentrations. See Figure 4-8 B. Refer to
section 4.11 Printing the Test Results and Channel Data on page 13 to print.
(A) (B)
Figure 4-8. Sample Test Results for Pure Blend Refrigerant with Incorrect Component Ratios
4.10. Measuring Air
The Pur•Chek™ Pro offers the ability to measure the presence of air independently during every
test. The built in oxygen sensor will display the percentage of air in all identified or identified and
analyzed refrigerants if there is air in a system or cylinder. Figure 4-9 A shows how the LCD will
display air if detected. Pressing ‘MORE’ will display the purity of the refrigerants which were
detected (Figure 4-9 B).
(A) (B)
Figure 4-9. Sample Test Results for Air Measurements

Operation and Maintenance Instruction Manual
P/N 2100-9001 Rev 3 13

NOTE: Air is measured independently
from refrigerant.
You can have 100% pure
refrigerant with a percentage of air in a system or tank. The presence of air will
display on the initial results screen and on every printed test.
4.11. Printing the Test Results and Channel Data
The test results can be printed by selecting the PRINT button. Pressing PRINT will print the test results
for all analyzed refrigerants. The screen in Figure 4-10 A will display during printing. If printing identified
or unknown refrigerants, pressing PRINT will print the channel data from the test. Figure 4-10 B will
display during channel data printing.
(A) (B)
Figure 4-10. Sample Printing Results and Printing Components Screens
After the print is complete, carefully tear off the printout and the unit will return to the previous screen.
Additional printouts may be made following the same procedure. To exit the test, press the EXIT button.
Figure 4-11A, Figure 4-11B, and Figure 4-11C show sample printouts for various test results.
NOTE: Care must be taken when tearing off the printed results to leave a clean edge. Tear
the paper from RIGHT to LEFT to avoid paper jams.
(A) (B) (C)
Figure 4-11. Samples of Printed Test Results

Operation and Maintenance Instruction Manual
14 P/N 2100-9001 Rev 3
4.12. Channel Data Modeling
Channel Data Modeling is a unique feature to the Pur•Chek™ Pro. It allows the user to test refrigerants
that the analyzer may not already identify and “fingerprint” the data using the available channels. The
channel data is available for identified and unknown refrigerants.
Once you complete a test on an identified refrigerant (see list in section 4.8 Pure Refrigerants on page
11) or unknown refrigerants, the test results will display similar to Figure 4-12 A for identified refrigerants
or Figure 4-12 B for unknown refrigerants. Once displayed, the analyzer will allow the user to print.
Press the PRINT button and the data will appear on the printout similar to Figure 4-12 C.
This new feature allows the user to develop a “fingerprint” model for different refrigerants the Pur•Chek™
Pro may not already analyze. If the user tests a virgin tank of refrigerant at least 3 times and receives
channel data that is consistent or within a close range to one another, this data can be used as a
“fingerprint” model of that particular refrigerant. This feature will allow the user to have a guide to identify
refrigerants not already established by the analyzer and increases the capabilities of the Pur•Chek™ Pro.
Figure 4-12. Samples of Test Results Showing Channel Data Printout
NOTE: This is not a guaranteed method for identifying refrigerants. Results will vary and
some refrigerants may create inconsistent data.

Operation and Maintenance Instruction Manual
P/N 2100-9001 Rev 3 15
5. Maintenance and Troubleshooting
5.1. Setting the LCD Contrast
The Pur•Chek™ Pro features an adjustable LCD contrast for use in varying light conditions. To adjust the
contrast, press the SET button which appears after the unit is powered on. The screen will display
several options as shown in Figure 5-1 A. Press the SET button to display the options in Figure 5-1 B.
(A) (B)
Figure 5-1. Sample Screens Used in Setting LCD Contrast
5.2. Changing the White Plastic Sample Filter
When inspecting the sample filter, look completely around the entire outside diameter of the white filter
element located inside of the clear plastic housing. Look for red spots or the beginnings of discoloration
on the white outside diameter of the element. Do not look into the round ends of the white element for red
spots or discoloration. The round ends of the filter may always appear red. If red spots or discolorations
are discovered on the outside diameter, the sample filter requires replacement to prevent the influx of
particulate and oil mists into the instrument.
To replace the white plastic sample filter, follow the instructions below.
1) Obtain replacement filter P/N 2100-0006 (see Table 1-2 on page 3).
2) Remove the existing filter from the retaining clip of the instrument by pulling straight up and out.
3) CAREFULLY remove the flexible, black rubber tubing connections from both ends of the existing
filter.
IMPORTANT:DO NOT allow the tubes to slip back into the internal portion of the
case.
4) Discard the existing filter in an environmentally friendly manner.
5) Install the tube ends onto the barbs of the replacement filter, taking note to align the flow arrow of
the filter with the flow arrow of the instrument top panel.
6) CAREFULLY slide the tubing back into the internal portion of the instrument and seat the new
filter into the retaining clip.
7) Inspect the sample hoses for signs of oil entrapment.
8) Replacement of the sample filter usually requires cleaning or replacement of the sample hoses.

Operation and Maintenance Instruction Manual
16 P/N 2100-9001 Rev 3
5.3. Replacing the Sample Hose
Inspect the inside diameter of the tube for signs of oil build up, dirt, obstructions, kinks, cuts, fraying, or
any other signs of wear before use. Oil contamination cannot be cleaned out of sample hoses due to the
density of the brass oil restrictor. If oil is visible in the hose assembly, replace the hose and brass
restrictor with P/N 2100-0010 (refer to Table 1-2 on page 3).
NOTE: The analyzer will indicate “Non-Condensable” or “Unknown Refrigerant” if it does not
receive a good sample due to obstructed flow or lack of flow (approximately less than 30 psig
or 2 Bar). If this occurs the sample hose may need to be replaced.
To replace the hose and restrictor assembly, follow the instructions below.
1) Disconnect the sample hose from the analyzer.
2) Remove the brass restrictor (with hose attached) from the coupler and discard. Be sure to use a
backing wrench to avoid damaging the coupler.
3) Check for signs of oil and debris in the coupler.
4) Using “CRC Brakleen” or similar cleaner which ONLY contains tetrachloroethylene and carbon
dioxide, follow the safety instructions on the can and spray all parts of the coupler with the
cleaner to remove the oil.
IMPORTANT:DO NOT soak the parts for more than 60 seconds.
5) Allow coupler parts to dry. Check coupler parts for oil once again. Failure to clean the oil out of
the coupler will result in premature clogging of the new filter.
6) Install the new brass restrictor (P/N 2100-0010) into the coupler and lightly tighten. Usually finger
tight is sufficient.
5.4. Changing the Printer Paper
Pur•Chek™ Pro Refrigerant Analyzers are equipped with on-board printers and use an inexpensive
thermal paper for printing. The paper roll should be changed when a red stripe appears on the left side of
the printout.
To change the paper roll, press the SET button shortly after powering on the analyzer (or any time that it
appears). See Figure 5-2 A. Press the SET button to advance to the screen shown in Figure 5-2 B.
Follow the instructions on the screen to load the paper.
(A) (B)
Figure 5-2. Screens Used in Changing Printer Paper