Baker Hughes Panametrics Aurora H2O User manual

Aurora H2O
User’s manual
910-284 Rev. J
ATTENTION!
This manual is intended for units with S/N 3999
(software v.001.A through v.001.U) or lower only.
[For units with S/N above 3999, use manual 910-317.]

ii

Aurora H2O
Moisture analyzer for natural gas
User’s manual
910-284 Rev. J
April 2017
ATTENTION!
This manual is intended for units with S/N 3999
(software v.001.A through v.001.U) or lower only.
[For units with S/N above 3999, use manual 910-317.] iii

[no content intended for this page - proceed to next page]
iv

Contents
Product registration ..................................................................................ix
Services ..............................................................................................ix
Typographical conventions ...........................................................................ix
Safety Issues .........................................................................................ix
Auxiliary equipment .................................................................................. x
Environmental compliance ........................................................................... x
Chapter 1. Features and capabilities .....................................................1
1.1 Overview..........................................................................................1
1.2 Features ..........................................................................................1
1.3 Theory of operation ..............................................................................2
1.4 Specifications....................................................................................8
1.4.1 Power .....................................................................................................8
1.4.2 Range .....................................................................................................8
1.4.3 Accuracy..................................................................................................8
1.4.4 Response time ............................................................................................8
1.4.5 Operating pressure .......................................................................................8
1.4.6 Temperature ..............................................................................................8
1.4.7 Flow rate ..................................................................................................8
1.4.8 Display ....................................................................................................8
1.4.9 Inputs/outputs ............................................................................................8
1.4.10 Enclosure..................................................................................................8
1.4.11 Laser certification .........................................................................................8
1.4.12 User interface .............................................................................................9
1.4.13 Weight and dimensions...................................................................................9
1.4.14 Hazardous area certification..............................................................................9
1.4.15 European certification ....................................................................................9
1.4.16 Software ..................................................................................................9
1.4.17 Sampling system .........................................................................................9
1.4.18 Wetted components ......................................................................................9
Chapter 2. Installation ..................................................................11
2.1 Introduction .....................................................................................11
2.2 Bill of materials ..................................................................................11
2.3 Unpacking .......................................................................................11
2.4 Choosing a site for installation ...................................................................12
2.5 Low voltage directive ............................................................................13
2.6 Mounting ........................................................................................13
2.7 Optional insertion probe/regulator...............................................................13
2.7.1 Description...............................................................................................13
2.7.2 Installation ...............................................................................................14
2.7.3 Setting the pressure......................................................................................17
2.8 Making electrical connections ...................................................................17
2.9 Specific conditions of use ....................................................................... 19
v

Chapter 3. Operation and general programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.1 Using the Aurora H2O ...........................................................................23
3.2 Sample system .................................................................................23
3.2.1 Aurora H2O startup...................................................................................... 23
3.2.2 Aurora H2O shut down .................................................................................. 23
3.2.3 Aurora H2O purge gas connection...................................................................... 23
3.3 Keypad features ................................................................................25
3.3.1 Indicator lights ..........................................................................................25
3.3.2 The magnetic stylus ....................................................................................25
3.3.3 The default display......................................................................................25
3.3.4 Unlocking the keypad ...................................................................................26
3.3.5 Keypad lock-out switch .................................................................................26
3.3.6 Accessing the menus ...................................................................................26
3.3.7 Entering numeric values ................................................................................26
3.3.8 Starting up ..............................................................................................26
3.4 Setting up the display...........................................................................27
3.4.1 Selecting primary units ..................................................................................27
3.4.2 Selecting alt 1 and alt 2 units .............................................................................27
3.4.3 Setting decimal places ..................................................................................27
3.4.4 Data/scan................................................................................................27
3.4.5 Adjust ................................................................................................... 28
3.4.6 Reverse .................................................................................................28
3.5 Setting up the outputs ..........................................................................29
3.5.1 Selecting an output for setup ........................................................................... 29
3.5.2 Selecting output units...................................................................................29
3.5.3 Selecting an output type................................................................................29
3.5.4 Changing the upper output span.......................................................................29
3.5.5 Changing the lower output span .......................................................................30
3.5.6 NAMUR response ........................................................................................30
3.5.7 Testing the output........................................................................................31
3.5.8 Trimming the outputs ................................................................................... 32
3.6 Setting up the alarms ...........................................................................33
3.6.1 Selecting an alarm output .............................................................................. 33
3.6.2 Selecting alarm status .................................................................................. 33
3.6.3 Selecting alarm units ................................................................................... 33
3.6.4 Selecting an alarm type ................................................................................34
3.6.5 How the alarm types work ..............................................................................34
3.6.6 Changing the upper alarm span .......................................................................34
3.6.7 Changing the lower alarm span ........................................................................34
Chapter 4. Programming advanced features ..........................................35
4.1 Comm port settings ............................................................................35
4.1.1 Selecting a comm port .................................................................................35
4.1.2 Setting the baud rate ...................................................................................36
4.1.3 Setting parity............................................................................................36
4.1.4 Selecting protocol.......................................................................................36
4.1.5 Setting the network ID...................................................................................36
vi

4.2 Adjust offset values .............................................................................37
4.2.1 Adjusting the PPMv offset ................................................................................37
4.2.2 Adjusting the smoothing filter............................................................................37
4.2.3 Adjusting the scan averaging...........................................................................38
4.2.4 Setting the dew point calculation method ..............................................................38
4.3 Set up the background gas .....................................................................39
4.3.1 Selecting the type of gas ...............................................................................39
4.3.2 Setting the Z factor......................................................................................39
4.3.3 Entering a label .........................................................................................40
4.3.4 Adjusting the gas offset..................................................................................41
4.4 Clock settings................................................................................... 41
4.4.1 Resetting the hour .......................................................................................41
4.4.2 Resetting the minutes....................................................................................41
4.4.3 Resetting the month ....................................................................................42
4.4.4 Resetting the date ......................................................................................42
4.4.5 Resetting the year....................................................................................... 42
4.5 Pressure settings ...............................................................................43
4.5.1 Setting pressure units ...................................................................................43
4.5.2 Setting the source.......................................................................................43
4.5.3 Changing the constant .................................................................................43
4.5.4 Editing pressure calibration.............................................................................44
4.6 Regional settings ...............................................................................45
4.6.1 Setting the country code................................................................................45
4.6.2 Setting the decimal format .............................................................................45
4.6.3 Setting the date format .................................................................................45
4.6.4 Setting the unit system..................................................................................46
4.7 User calibration.................................................................................46
4.8 Service settings.................................................................................47
4.9 Aurora H2O information .........................................................................48
4.9.1 Checking the ID .........................................................................................48
4.9.2 Checking the system status ............................................................................48
4.9.3 Checking the software ..................................................................................48
4.9.4 Checking the gas composition .........................................................................48
4.9.5 Checking the alternate gas composition ...............................................................49
4.10 Locking/unlocking the display ..................................................................49
Chapter 5. AuroraView interface software.............................................. 51
5.1 Capabilities..................................................................................... 51
5.2 Requirements................................................................................... 51
5.3 Installing AuroraView ...........................................................................52
5.4 Starting AuroraView ............................................................................54
5.5 Using the main menus ..........................................................................56
5.6 Datalogging with AuroraView ...................................................................58
5.7 Working with trend plots, trend tabular data and scan plots ....................................59
vii

Chapter 6. Maintenance ...............................................................63
6.1 Spare parts .....................................................................................63
6.2 Cleaning the mirror .............................................................................64
6.2.1 Instructions for optical absorption cell style 1 ...........................................................65
6.2.2 Instructions for optical absorption cell style 2 .......................................................... 67
6.3 Replacing the filter element.....................................................................69
Chapter 7. Troubleshooting .............................................................71
7.1 Introduction .....................................................................................71
7.2 Blank display ....................................................................................71
7.3 Display dim or hard to read ......................................................................71
7.4 Status messages and indicators .................................................................71
7.5 No flow measurement indicated on Aurora H2O measurement cell outlet .......................73
7.6 Verifying Aurora H2O performance in the field...................................................73
7.6.1 Using a portable hygrometer ............................................................................73
7.6.2 Using a moisture standard...............................................................................73
7.7 Background selection lockout...................................................................74
Appendix A. MODBUS RTU/RS485 communications.....................................75
A.1 Introduction ....................................................................................75
A.2 Modbus functions and data types ..............................................................75
A.3 Modbus registers ...............................................................................76
A.4 Modbus system status codes ...................................................................80
viii

Product registration
Thank you for purchasing a model Aurora H2O from
Panametrics. Please register your product at https://info.
bakerhughesds.com/New-product-registration-LP for
product support such as the latest software/firmware
upgrades, product information and special promotions.
Services
Panametrics provides customers with an experienced
staff of customer support personnel ready to respond to
technical inquiries, as well as other remote and on-site
support needs. To complement our broad portfolio of
industry-leading solutions, we offer several types of
flexible and scalable support services including: training,
product repairs, service agreements and more. Please
visit https://www.bakerhughesds.com/panametrics/services
for more details.
Typographical conventions
NOTE: These paragraphs provide information that provides a
deeper understanding of the situation, but is not essential to
the proper completion of the instructions.
IMPORTANT
These paragraphs provide information that emphasizes
instructions that are essential to proper setup of the
equipment. Failure to follow these instructions carefully
may cause unreliable performance.
CAUTION!
This symbol indicates a risk of potential
minor personal injury and/or severe damage
to the equipment, unless these instructions
are followed carefully.
WARNING!
This symbol indicates a risk of potential
serious personal injury, unless these
instructions are followed carefully.
Safety Issues
WARNING!
It is the responsibility of the user to make sure
all local, county, state and national codes,
regulations, rules and laws related to safety
and safe operating conditions are met for
each installation.
Attention European customers!
To meet CE Mark requirements for all units
intended for use in the EU, all electrical cables
must be installed as described in
this manual.
ix

Auxiliary equipment
Local safety standards
The user must make sure that he operates all auxiliary
equipment in accordance with local codes, standards,
regulations, or laws applicable to safety.
Working area
WARNING!
Auxiliary equipment may have both manual
and automatic modes of operation. As
equipment can move suddenly and without
warning, do not enter the work cell of this
equipment during automatic operation,
and do not enter the work envelope of this
equipment during manual operation. If you
do, serious injury can result.
WARNING!
Make sure that power to the auxiliary
equipment is turned OFF and locked out
before you perform maintenance procedures
on this equipment.
Qualification of personnel
Make sure that all personnel have manufacturer-approved
training applicable to the auxiliary equipment.
Personal safety equipment
Make sure that operators and maintenance personnel have
all safety equipment applicable to the auxiliary equipment.
Examples include safety glasses, protective headgear,
safety shoes, etc.
Unauthorized operation
Make sure that unauthorized personnel cannot gain access
to the operation of the equipment.
Environmental compliance
RoHS
The Aurora H2O fully complies with RoHS regulations.
Waste Electrical and Electronic Equipment (WEEE) Directive
Panametrics is an active participant in Europe’s Waste
Electrical and Electronic Equipment (WEEE) take-back
initiative (Directive 2012/19/EU).
The equipment that you bought has required the extraction
and use of natural resources for its production. It may
contain hazardous substances that could impact health
and the environment.
In order to avoid the dissemination of those substances in
our environment and to diminish the pressure on the natural
resources, we encourage you to use the appropriate take-
back systems. Those systems will reuse or recycle most of
the materials of your end of life equipment in a sound way.
The crossed-out wheeled bin symbol invites you to use
those systems.
If you need more information on the collection, reuse and
recycling systems, please contact your local or regional
waste administration.
Please visit https://www.bakerhughesds.com/health-safety-
and-environment-hse for take-back instructions and more
information about this initiative.
x

Chapter 1. Features
and capabilities
1.1 Overview
Panametrics’ Aurora H2O moisture analyzer for natural
gas makes it possible for natural gas processing and
transportation facilities to monitor moisture content in
real-time with high precision and reliability.
The Aurora H2O analyzer uses tunable diode laser
absorption spectroscopy (TDLAS) to measure moisture in
natural gas at the speed of light. The analyzer is suitable
for installation in hazardous areas and operates over a
wide range of environmental conditions. Aurora’s fast
response quickly alerts and documents when moisture
concentrations are out of compliance. Once process
upsets are corrected and the gas dries out, the fast
response quickly enables natural gas to be cleared
for entry into the “energy grid”.
Class 1 laser product
WARNING!
Use of controls or adjustments or the
performance of procedures other than
those specified herein may result in
hazardous laser exposure.
1.2 Features
• Optical response: < 2 seconds after flow cell is purged.
No cross sensitivity to glycols or amines.
• Direct readout in lbs/mmscf, mg/m3or ppm.
• Reads process pressure dew point (with user
programmable constant or live auxiliary input for
process pressure).
• Turnkey sampling system specifically designed for
natural gas applications ensures measurement integrity.
• Magnetic stylus enables through-glass programming –
hot permit not required to field program.
• Explosion-proof/flameproof design
• 4-20 mA signals and RS-232/485 MODBUS RTU for
connection to SCADA or plant monitoring system.
• Supplied with AuroraView software for remote
configuration, data logging and data retrieval
capacity.
• NIST traceable calibration.
• In conformance with IEC 60825-1 edition 2.0,
Safety of laser products.
1

1.3 Theory of operation
The Panametrics Aurora H2O (tunable diode laser
absorption spectroscopy) hygrometer for natural gas is
a system designed to continuously monitor the moisture
content in natural gas. It fundamentally measures the
partial pressure of water vapor (water in the gas state),
and with the simultaneous measurement of pressure
and temperature, provides readings and both analog and
digital signal transmission of user-selectable moisture
parameters including dew point temperature, volume
ratio and absolute humidity (lbs/MMSCF or mg/m3)
in addition to temperature and pressure.
The Aurora H2O is supplied with an integrated sampling
system which includes an optional pipe-mounted liquid
separator and pressure reducing valve/regulator, and the
following components mounted within a stainless steel
enclosure: isolation valve, coalescing filter, coalescer flow
control valve, sample cell control valve, second pressure
reducing valve/regulator, and flow indicator (rotameter),
as well as an optional electrical heater and thermostat.
The fundamental water vapor pressure measurement is
based on the Beer-Lambert Law:
A = In ( Io) = SLN
I
where: A = absorbance
I = Light intensity transmitted through
a sample gas
Io= Incident light intensity
S = Absorption coefficient*
L = Absorption path length (a constant)
N = Concentration of the water vapor
in the absorption cell
* The absorption coefficient is a constant for a specific
gas composition at a given pressure and temperature.
The concentration of the water is directly related to the
partial pressure. At certain specific frequencies, light energy
will be absorbed by water molecules. As the concentration
of water increases, the absorption also increases. The
Aurora H2O sweeps the diode laser output across a
narrow band in the near infrared spectrum and, by
measuring the light intensity with a photo detector,
is able to provide a direct indication of the partial
pressure of water. The partial pressure, multiplied by
106and divided by the total pressure, yields the
volume ratio in ppmv (parts per million by volume).
The laser diode is housed in a hermetically sealed and
dry housing. The light is transmitted through a window
made of proprietary transparent material. The light
travels through a stainless steel cell and is reflected off
a gold-plated mirror and returned to a photo detector,
where the light intensity is measured.
Since only light comes in contact with the sample of
natural gas, and all of the wetted materials are made
of non-corrosive and inert materials, this technology
does not exhibit the drift associated with gas contacting
sensor-based hygrometers. The diode laser emits low
energy light, and therefore the system will not ignite
the gas. The complete system is rated explosion-proof,
and the Aurora H2O provides very fast response time.
Once the absorption cell (see Figure 1 below) is purged,
the response time is a matter of a few seconds.
Photodetector
Optical window
Gas outlet
Tunable diode laser
Hermetically sealed housing
Stainless steel
absorption cell
Gas inletMirror
Figure 1: Laser absorption cell, basic elements
The control of the laser, power supply and signal
conditioning circuitry are housed in an explosion-proof
transmitter enclosure. A backlit, three-parameter, LCD
display provides digital indication of user-programmable
parameters. The Aurora H2O has three user-programmable
(4-20 mA) analog outputs and two programmable digital
ports that may be configured as either RS-485 or RS-232
with modbus protocol. The analyzer has an auxiliary analog
input (4-20 mA) input that is used for connection to an
optional process pressure transmitter. Measurement of the
process pressure enables the Aurora H2O to display and
transmit the process dew point. AuroraView software is
provided and enables remote readings, programming
data logging and data logging with a personal computer.
The Aurora H2O hygrometer is calibrated against an
NIST (or other national metrological institute) traceable
reference dew/point generator and hygrometer. Each
system is supplied with a certificate of calibration with
functional test data.
2

NOTE: Refer to Figure 2 below and Table 1 on page 5 to identify your Aurora components.
13
12
11
4
6
7
5
13
14
8
9
10
15
2
Figure 2: Aurora H2O system assembly with optional USA/CAN heater
3

NOTE: Refer to Figure 3 below and Table 1 on page 5 to identify your Aurora components.
13
124
6
7
5
13
14
8
9
10
15
2
Figure 3: Aurora H2O system assembly with optional EU/ATEX heater
4

NOTE: Refer to Table 1 on page 5 and either Figure 2 on
page 3 or Figure 3 on page 4 to identify your Aurora
components.
Table 1: Aurora H2O system parts list
No. Description
1Conduit I/O
2Display and magnetic stylus keypad
3Wiring terminals
4Isolation valve (needle valve)
5Membrane filter
6Membrane filter drain and fast loop vent
7Pressure regulator w/ 0-10 psig outlet
pressure gauge
8Magnetic stylus
9 Process or purge gas selector
10 Purge gas inlet needle valve
11 Absorption cell
12 Temperature sensor
13 Pressure sensor
14 Rotameter
15 Optional heater, thermostat, junction box
5

IMPORTANT
The filter installed within the Aurora is designed to function
as a secondary filter. A primary filter or filter train should
be used upstream of the analyzer. Do not sample directly
from the process gas to the Aurora without the use of a
primary filter and pressure reduction. The pressure inlet to
the Aurora sample inlet should not exceed 500 psig.
For natural gas, a pipeline insertion membrane filter
is recommended as shown in Figure 4 on page 6.
The installation of the insertion filter is described in this
manual. The insertion filter also is equipped with a pressure
regulator which functions to reduce the pressure. If it is not
possible to install the insertion filter, consult Panametrics
application engineers for information about a sample
conditioning system.
1
3
4
2
Detail A
Part Probe Overall
number length length
01 750-633 4.00” 11.80”
02 750-634 7.00” 14.80”
03 750-635 9.00” 16.80”
04 750-633 4.00” 11.80”
05 750-634 7.00” 14.80”
06 750-635 9.00” 16.80”
1 Probe/filter/regulator assembly
2 Pressure gauge, 0 to 600 psig
3 2-way ball valve
4 Tube fitting
Notes:
1. Sample process connection: 3/4” NPTM
2. Sample outlet connection: 1/4” compression fittings
3. Dimensions are in inches (millimeters)
5.6 (142.2)
0.92
3/4” NPTM
2.25 (57.1)
1.20 - 1.75
(30.48 - 44.45)
3.42
(86.8)
Overall length
(See detail A)
Probe length
(See detail A)
Figure 4: Sample system (ref. dwg #733-737)
6

1
2
3
4
8
7
6
5
Thermostat
Customer cable gland
Line
230 VAC
L1
L2
G
120 VAC
L
N
G
Neutral
Ground
Brown
Blue
Green/yellow
J1
16 awg brown wire (2”)
strip 1/4”
Heater connection
Figure 5: USA/CAN heater wiring diagram
Customer cable
Cable to thermostat
Cable to heater
12
34
Figure 6: EU/ATEX heater wiring diagram
Cable function Conductor Color J-box terminal
Customer power
Line 1 Brown 3
Line 2 Blue 4
Ground Green/yellow 1
Thermostat
Line 1 Brown 2
Line 2 Blue 3
Ground Green/yellow 1
Heater
Line 1 Brown 2
Line 2 Blue 4
Ground Green/yellow 1
7

1.4 Specifications
1.4.1 Power
Analyzer:
100-240 VAC, 50-60Hz, 10W
18-32 VDC (24 VDC nominal), 10W
Optional electrical heater:
120VAC, 120W
230VAC, 75W
1.4.2 Range
Part per million by volume
5 to 5000 ppmv
Dew/frost point*
85.9°F to 27.3°F) (-65.5°C to -2.6°C)
Process dew/frost point*
Process or equivalent dew point/frost point by calculation
with process pressure signal (4-20 mA) or constant
Absolute humidity
3.8 to 3803 mg/m3(0.24 to 237 lbs/MMSCF)
*Readings below 0°C (32°F) are in “frost point” temperature,
and above 0°C (32°F) are in “dew point” temperature.
1.4.3 Accuracy
Parts per million by volume
±2% of reading in ppmvor 4 ppmv(Accuracy of
other parameters derived from ppmv)
1.4.4 Response time
Optical response
<2 seconds
System response
The system response is dependent upon the length of
sample tubing, sample system components, flowrate and
pressure, as well as the change in moisture concentration.
1.4.5 Operating pressure
Operating sample cell pressure:
69 to 172 kPa (10 to 25 psia)
Maximum pressure
1380 kPa (200 psi)
Process pressure
10,342 kPa (1500 psig) maximum [higher pressure available
using additional sampling system components]
1.4.6 Temperature
Operating
-20° to +65°C (-4° to 149°F)
Storage
-20° to +70°C (-4° to 158°F)
Optional heater/thermostat setpoint
20°±5°C (68°±9°F) for U.S. and Canada
10°±5°C (50°±9°F) for EU and elsewhere
1.4.7 Flow rate
Sample cell flowrate
10 to 60 SLH (0.4 to 2 SCFH); 30 SLH (1 SCFH) nominal
Coalescer by-pass fast loop
5 to 10X of flowrate through sample cell
1.4.8 Display
Backlit LCD, three programmable simultaneous parameters,
alphanumeric status and diagnostic display, LEDs for power,
laser temperature stability, keypad lockout
1.4.9 Inputs/outputs
Analog outputs
Three programmable 0/4-20 mA, 500 Ωmaximum load
Analog input
Loop-powered 4-20 mA input for remote pressure
transmitter (Aurora H2O supplies 24 VDC)
Digital interface
Two programmable digital communications ports
RS-232 and RS-485 with multi-drop capability and
assignable address, modbus RTU protocol
1.4.10 Enclosure
Ingress protection
IP-66
1.4.11 Laser certification
Class 1 product, conforms to IEC 60825-1 edition 2.0, Safety of
laser products
WARNING!
Use of controls or adjustments or the
performance of procedures other than those
specified herein may result in hazardous
laser exposure.
8

1.4.12 User interface
Programmable “through-the-glass” via magnetic stylus
1.4.13 Weight and dimensions
Net Weight
45 kg (100 lb)
Overall dimensions
34”H x 18”W x 14”D (87 cm x 46 cm x 36 cm)
[see drawings]
1.4.14 Hazardous area certification
USA/Canada
Explosion-proof for class I,
division 1, groups B, C&D
Dust-Ignitionproof for class II/III,
division 1, groups E, F&G
(Canada only)
EU and elsewhere
ATEX and IECEx: Ex d e IIB+H2 T6 Gb IP66;
Tamb = -20°C to +65°C. Flameproof with
increased safety compartment
Evaluated against standards EN 60079-0:2012,
EN 60079-1:2007, EN 60079-7:2007, IEC 60079-0:2011,
IEC 60079-1:2007, IEC 60079-7:2006.
1.4.15 European certification
CE
Complies with EMC directive 2014/30/EU low voltage directive
2014/35/EU and pressure directive 2014/68/EU for DN<25
1.4.16 Software
Displays all key parameters. provides time-base graphing,
data logging ability, export data as ASCII text. Software has
lockout/passcode.
1.4.17 Sampling system
Integrated sampling system to filter out physical
contaminants, remove glycol carry over, control
temperature condition, regulate pressure and flow rate.
Optional thermostatically controlled heater.
1.4.18 Wetted components
316/316L stainless steel for tubing and fittings. Other wetted
components such as the optical window and mirror are
proprietary materials and are compatible with natural
gas and typical contaminants found in natural gas. Other
sample system components wetted parts include PTFE,
PFA, Inconel, Hastelloy, PVDF, glass, Viton.
9

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