YZ Systems DTEX DX1000G/L Parts list manual
Version: 05132020
DX1000G/L Table of Contents
I
How to Use this Manual.......................................................................................................................1
Typographic Conventions ....................................................................................................................1
Getting Help.........................................................................................................................................1
Operation Specications......................................................................................................................2
Introduction..........................................................................................................................................2
Theory of Operation.............................................................................................................................3
5
Standard System Components............................................................................................................5
System Flow Schematic ......................................................................................................................6
Standard System Connections............................................................................................................7
9
Display and Keypad.............................................................................................................................9
Special Keys......................................................................................................................................10
System Conguration ........................................................................................................................13
Conducting An Odor Concentration Test ...........................................................................................15
Conducting An Odor Intensity Test ....................................................................................................23
Recommended Maintenance.............................................................................................................31
Recharging the Battery................................................................................................................31
Cleaning ......................................................................................................................................31
Venting and Purging ....................................................................................................................31
Recommended Spare Parts ..............................................................................................................31
Re-Calibration/Inspection ..................................................................................................................32
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page VI DX1000G/L ver.05132020
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page 1DTEX 1000G/L ver.05132020
Section 1: First Things To Know About The DTEX
The DTEX 1000G/L Operations Manual is a step-by-
step guide containing the procedures needed to work
with the DTEX 1000G/L System.
The DTEX Instruments implement the most advanced
technology available in the industry. It is recommend-
ed that the technicians working with the DTEX Instru-
ments study the manual prior to initiating work on the
system for the rst time.
To aide in readability, this manual uses several
typographic conventions. References to illustrations,
photographs, and other related content will appear in
italicized text along with the location of where to nd
the item in the manual. Digital versions of the manu-
al, available in Adobe Acrobat™ PDF format, will be
highlighted further in blue italic text.
Measurement units are listed in italic parenthesis text
following their US standard equivalent. As an exam-
ple, for dening a distance, 15’ (4.5 meters), is how
the text will appear throughout the manual.
Items that require action, for example the pressing of a
key for programming the controller, will feature the action
item in sentence case followed in normal
text by the item such as, the key or
switch.
™ Adobe Acrobat & Acrobat Reader are trademarks of Adobe Systems, Inc.
This manual provides solutions to typical questions
about the DTEX 1000G/L system. If the answer can
not be found within this manual, contact YZ Systems
at:
T: 1.281.362.6500
T: 1.800.653.9435
F: 1.281-362-6513
When calling, have this manual close at hand. Wheth-
er calling or writing, please include in your communi-
que the following information:
• The serial number, and rmware version number of
the DTEX Instrument and the version number of this
manual. The serial number, and rmware version
number are available on the DTEX display, when
powering the instrument up. Refer to Information
in Section 3 on page 10. The serial number is also
located on the model number plate located between
the hinges on the back of the enclosure. The ver-
sion number of this manual is located at the bottom
of each page.
• A description of the problem and, if applicable the
actions of the technical personnel when the problem
occurred.
Page 2 DTEX 1000G/L ver.05132020
Section 1: First Things To Know About The DTEX
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Maximum Operating Pressure: 5 psig
(0.345 Bar (g)
Minimum Operating Pressure: 5” water column
Operating Temp Range: *0 to 140 degrees F.
(17°C to 60°C)
Power Supply: 12VDC Internal
Rechargable Battery
NOTE:
*If Battery charge is less tha 50%, recharge battery for
a minimum of 24 hours before use.
CAUTION:
The DTEX system is designed to evaluate odor inten-
sity in gas streams. Because of the potentially haz-
ardous nature of conditions and elements involved in
conducting tests, users are reminded to use extreme
caution while operating the DTEX system. The system
operated improperly or past due calibration could cre-
ate a dangerous situation to both persons or property
as well as produce inaccurate test results. *Refer to
D6273-98 ASTM Standard Test Methods for Gas
Odor Intensity for guidance regarding precautions,
hazards and procedures.
Congratulations on your purchase of the DTEX
DX 1000G/L odorant detection system. You’ve
made a wise investment for your company.
DTEX is a small, handheld instrument, which
assists the user in determining the odorant
intensity of Natural Gas/LPG with menu-driven,
step-by-step instructions. After connecting to
the sample point, sni test completion times
typically run 2 to 3 minutes. The DTEX system
displays the actual air/gas percentage, pres-
ent in the device, thus eliminating the need for
ow tubes and cross-reference charts. With an
on-board database of 50 test locations, DTEX
can record multiple tests for each test location,
including and
readings and
test notes, such as odor intensity ratings, weath-
er conditions, etc. Then, DTEX goes one-step
further by storing up to 75 complete test results
electronically. Back at the oce the test results
can be individually reviewed or downloaded into
a PC. It’s that simple.
Other important features of the DTEX system
are:
•Intrinsically safe for hazardous locations
Class 1, Division I, Groups C&D
•Low power circuitry
•Rechargeable battery
•Rugged enclosure
•Completely portable
•Ergonomically designed for compatible
operator interface
•Odorant level detection reports are no
longer manually written
This Manual Covers both versions, Natural Gas
and LPG. Applies to DTEX 1000 G and L.
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page 3DTEX 1000G/L ver.05132020
Section 1: First Things To Know About The DTEX
Two procedures for determining odor intensity are
outlined in ASTM D 6273, the
, and the -
. Either, or both procedures may be
utilized with this DTEX instrument. The tests can
be conducted at any desired point in a gas trans-
mission or distribution system, as long as proper
test pressure is assured. The DTEX system can
accept inlet pressures from 5” water column, up to
5 psi. Any system pressure above this will require
a reduction regulator prior to the inlet of the DTEX
system. The gas stream to be tested enters the
DTEX system through the gas inlet connection. It
then passes through a low pressure regulator, and
on to the gas ow adjustment valve. This valve is
adjusted by the operator during a test to obtain
either -
. The gas then passes
through the electronic mass ow sensor, and on to
the mixing chamber where it is mixed with intake
air. A micro processor-based control algorithm is
employed to ensure constant fan speed at given
altitude and temperature. The air/gas mixture is
then delivered to the sni chamber where it is
evaluated by the operator.
CAUTION:
*Prolonged use of sense of smell may result in olfactory
fatigue; therefore take all necessary steps to assure that
exposure to odroized gas is limited.
When the desired odorant test level is detected, the
operator simply pushes the “Record Test Level”
button once to record the test data into memory.
Additional notes may be added to the test data, as
required. Actual test results are visible to the oper-
ator at the main display after the test has conclud-
ed. Up to 75 separate tests can be stored in the
system. All data can be downloaded to a host PC
and periodically appended and permanently stored
creating a paperless audit trail of odorant level
detection tests. These tests can later be analyzed
for trends or other statistical information.
* ASTM D 6273
Page 4 DTEX 1000G/L ver.05132020
Section 1: First Things To Know About The DTEX
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page 5DX1000G/L ver.05132020
Section 2: System Installation
The primary components of the DTEX DX
1000G/L system are illustrated here:
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page 6 DX1000G/L ver.05132020
Section 2: System Installation
Illustrated below are the major internal components
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page 7DX1000G/L ver.05132020
Section 2: System Installation
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page 8 DX1000G/L ver.05132020
Section 2: System Installation
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page 9DX-1000G/L ver.05132020
Section 3: System Control & Electronics
Display and Keypad:
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page 10 DX-1000G/L ver.05132020
Section 3: System Control & Electronics
Special Keys:
Below is a quick reference for all DTEX system
special keys.
The DTEX system includes several special informa-
tion keys. These allow the user to access system
information and basic or detailed test results. Re-
sults of any test currently stored in the system may
be accessed and reviewed at anytime. To access,
power on the system and sign on. The following
keys are accessible from the main menu screen.
Press ESC at any time to return to main menu.
The information key allows access to DTEX system
information. It will be necessary to furnish this infor-
mation in the event of a technical service or support
inquiry to the factory, or for customer records. Use
the arrow keys to view all available information.
The following information is displayed:
Model No. Version No.
Serial No.
Calibrated (last factory calibration)
Next Scheduled (factory calibration)
Last Error (system malfunction error message)
Key Function
/Used to move on-screen pointer up/down
or to scroll the screen up/down.
Space Used to insert a blank character.
Delete Used to delete a character of text
2nd Used to access the symbols depicted on
the number keys.
ESC Use to back up to a previous menu or abort
an operation.
Used to select an item with the on screen
pointer or to enter text.
Test Used to start test, set locations, and toggle between
Odor Concentration and Odor Intensity test
modes
Set Used to set time of day.
Review Used to review basic test data.
Details Used to review detailed test data
Info. Used to view unit information
Turns DTEX unit On/O
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page 11DX-1000G/L ver.05132020
Section 3: System Control & Electronics
Special Keys:
The review key allows for user to review basic in-
formation relative to any test currently stored in the
system. Use the to scroll to the desired
test to be reviewed.
The following information will be displayed:
Test No. Time of Test Date of Test
TDL:0.00% RDL:0.00%
Note: (3) RDL
Loc: YZ Systems
The details key allows for review of all information
relative to the test previously selected by the review
key. Use the arrow keys to view all available infor-
mation.
The following information will be displayed:
Test Details
Test No. Time of Test Date of Test
TDL:0.00% RDL:0.00%
Test Notes:
Location Name
Location Address
User Name
Test Duration (sec.)
Altitude (feet)
Temperature (°C)
The set key allows the operator to adjust the time of
day. Follow on-screen instructions.
•Press the test key to begin a
• Press the test key to enter new test locations
and addresses. (Follow on-screen instructions)
• Press the test key at the beginning of a test to
toggle between Odor Concentration, or Odor
Intensity test methods.
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page 12 DX-1000G/L ver.05132020
Section 3: System Control & Electronics
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page 13DX-1000G/L ver.0
Section 4: Preparing Your DTEX For A Test
The DTEX system can be up loaded with all
required test location and user data prior to
conducting tests via host PC and DTEX Report-
er Software. This facilitates more ecient and
simpler use of the DTEX system by requiring
less user and location data input each time a test
is conducted.
The following items can be uploaded into the
system using reporter software:
•User names
•User personal identication numbers (PIN)
•Test locations
•Test location cities
•Test location states/provinces
•Test location zip codes
•Altitudes
For instructions on conguring and uploading
the DTEX system and other features of Report-
er Software, please refer to the Reporter user’s
manual.
Should on-site initial conguration, changes, or
new additions to the DTEX system need to be
made, please refer to Sections 5 or 6:
Programming Operations - Detailed.
YZ Systems • 8825 N. Sam Houston Pkwy West • Houston, Texas • USA • 77064 • P: 281.362.6500 • F: 281.362.6513
Page 14 DX-1000G/L ver.05132020
Section 4: Preparing Your DTEX For A Test
WARNING
The DTEX system is designed to evaluate odor
intensity in gas streams. Because of the potential-
ly hazardous nature of conditions and elements
involved in conducting tests, users are reminded
to use extreme caution while operating the DTEX
system. The system operated improperly or past
due calibration could create a dangerous situation to
both persons or property as well as produce inaccu-
rate test results. Refer to D6273-98 ASTM standard
test methods for gas odor intensity for guidance
regarding precautions, hazards and procedures.
Before conducting tests at a site, investigate and
eliminate any possible ignition source in the immedi-
ate area.
Should the user detect or suspect a leak prior to or
during a test, immediately shut o the source isola-
tion valve and seek the cause.
Avoid conducting tests in closed or conned spaces.
Avoid conducting tests in windy conditions.
Operators of the DTEX system should possess an
“average” sense of smell. This will provide more con-
sistent results from test to test. Consideration should
be given to circumstances which could aect sense
of smell such as colds, medication, smoking, etc.
Be aware that user sense of smell can be dimin-
ished due to prolonged exposure to odors. Odor
intensity readings should be based on the rst few
snis. Occasionally, the user should pause between
snis and breath fresh air to rejuvenate sense of
smell, then resume the test.
Maximum inlet pressure to the DTEX system is 5
psi. If test source pressure exceeds 5 psi, install a
pressure reduction regulator prior to the gas inlet.
---
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