Aquametrix AM-TBR User Manual
OWNER’S MANUAL
AM-TBR Turbidimeter
Water Analytics
100 School Street
Andover, MA 01810
Phone: 749-9949
Toll free: 855-766-7623
N116-126 Rev 1 E-Mail: info@wateranalytics.net www.WaterAnalytics.net
DECLARATION OF CONFORMITY
Application of Council Directive
Standards to Which Conformity is Declared:
Product Safety - Tested and passed ETL (tested to UL 61010B-1), 1st Edition, Dated January
24, 2003
- Tested and passed ETLc (tested to CSA C22.2#1010.1-92)
- Tested and passed CE to IEC 61010-1: 2001 Edition 2.0
Emissions & Immunity – Tested and passed EN61326-1:2006
Manufacturer’s Name: Water Analytics, Inc.
Manufacturer’s Address: 100 School Street, Andover, MA 01810
Importer’s Name:
Importer’s Address:
Type of Equipment: Process Turbidimeter
Model No: AM-TBR
I, the undersigned, hereby declare that the equipment specified above conforms to the above
Directive and Standard
Mark Spencer, President
1. OVERVIEW ................................................................................................................2
1.1. The AM-TBR Series.................................................................................................................................................. 2
1.2. Unpacking and Inspection of the Instrument and Accessories .......................................................................... 2
1.3. The Display ................................................................................................................................................................. 3
1.4. The Touch Pad ........................................................................................................................................................... 3
1.5. Vapor Purge ............................................................................................................................................................... 4
2. SAFETY .....................................................................................................................5
3. INSTALLATION AND COMMISSIONING..................................................................5
3.1. Mounting & Site Selection ....................................................................................................................................... 5
3.2. Plumbing ..................................................................................................................................................................... 6
3.2.1. Drain Vent: ..........................................................................................................................................................7
3.2.2. Wetted Materials:................................................................................................................................................ 8
3.3. Electrical Connections .............................................................................................................................................. 8
3.3.1. Power ...................................................................................................................................................................9
3.3.2. RS-485 ................................................................................................................................................................. 9
3.3.3. Relays................................................................................................................................................................... 9
3.3.4. 4-20 mA............................................................................................................................................................. 10
4. OPERATION ............................................................................................................11
4.1. Routine Measurement ............................................................................................................................................ 11
4.2. Security Access Feature.......................................................................................................................................... 11
5. INSTRUMENT CALIBRATION ................................................................................13
5.1. Calibration Standards ............................................................................................................................................ 13
5.2. Calibration Procedures .......................................................................................................................................... 13
5.3. Calibration Error.................................................................................................................................................... 15
6. INSTRUMENT OFFSET...........................................................................................16
6.1. Indexing Calibration Cuvettes .............................................................................................................................. 17
6.2. Restoring Factory Settings..................................................................................................................................... 17
AM-TBR (5/10)
7. INSTRUMENT CONFIGURATION (CONFIG MODE) ..............................................18
7.1. Selecting the Output (O/P)..................................................................................................................................... 18
7.2. Setting the 4-20 mA................................................................................................................................................. 18
7.3. Configuring the Error Level.................................................................................................................................. 19
7.4. Configuring the RS–485 Port ................................................................................................................................ 19
7.5. Configuring the Alarms.......................................................................................................................................... 20
7.5.1. Alarm 1 .............................................................................................................................................................. 21
7.5.2. Alarm 2 .............................................................................................................................................................. 22
7.6. Offset Calibration.................................................................................................................................................... 22
7.7. Enabling the Security Access................................................................................................................................. 22
7.8. Extended Settings .................................................................................................................................................... 22
7.9. Speed of Response ...................................................................................................................................................22
7.10. Displayed Resolution............................................................................................................................................. 23
7.11. LCD Backlight Brightness ................................................................................................................................... 23
7.12. Setting the Units..................................................................................................................................................... 24
7.13. Ultrasonic Cleaning............................................................................................................................................... 24
7.14. RS-485 Parameters................................................................................................................................................ 24
7.15. Desiccant Alarm .................................................................................................................................................... 25
7.16. 4mA Adjustment ................................................................................................................................................... 26
7.17. 20mA Adjustment .................................................................................................................................................26
7.18. Saving Configuration Settings............................................................................................................................. 26
8. ADDITIONAL FEATURES AND OPTIONS .............................................................27
8.1. Backlit LCD.............................................................................................................................................................. 27
8.2. Ultrasonic Cleaning................................................................................................................................................. 27
8.3. RS-485 Outputs........................................................................................................................................................28
8.3.1. Water Analytics Online (WA catalog # 19783) .............................................................................................. 28
8.3.2. Simple Communication ....................................................................................................................................28
8.3.3. Modbus Communication................................................................................................................................... 29
8.4. Flow Alarm (Catalog # 19945A) ........................................................................................................................... 29
8.5. Flow Controller (Catalog # 19778) ....................................................................................................................... 29
AM-TBR (5/10)
8.6. Remote Panel Meter (Catalog # 19609) ............................................................................................................... 29
9. TROUBLESHOOTING & MAINTENANCE ..............................................................30
9.1. AM-TBR Fault Detection....................................................................................................................................... 30
9.2. System FAIL Message ............................................................................................................................................ 30
9.3. Diagnostic Chart...................................................................................................................................................... 31
9.4. Technical and Customer Assistance ..................................................................................................................... 31
10. ROUTINE MAINTENANCE ....................................................................................33
10.1. Cleaning the Flow Through Cuvette.................................................................................................................. 33
10.2. Replacing or Installing the Desiccant Pouch..................................................................................................... 33
10.3. Replacing the Source Lamp................................................................................................................................... 2
11. ACCESSORIES AND REPLACEMENT PARTS LIST.............................................2
12. WARRANTY.............................................................................................................3
1
Specifications
Measurement Range
0 – 1000.0 NTU
0 – 100 NTU (Model 20055 & 20056)
Accuracy
±2% of reading or ±0.02 NTU below 40 NTU whichever is greater
±5% of reading above 40 NTU
Resolution
0.0001 NTU (below 10 NTU)
Response Time
Adjustable
Display
Multi-Line Liquid Crystal Backlit Display
Alarms
Two Programmable, 120-240VAC 2A Form C Relay
Analog Output
Powered 4-20 mA, 600 Ω drive
Communications Port
Bi-directional RS-485, Modbus
Maximum Water Pressure
Integral pressure regulator rated 1380kPa (200 PSI.) Also refer to
Flow Rate
Flow Rate
100 ml/min. – 1 liter/min. (.026-.26 Gal/min)
Operating Temperature
1°C – 50°C (34°F – 122°F)
Wetted Materials
Nylon, Borosilicate Glass, Silicon, Polypropylene, Stainless Steel
Sample Temperature Range
1°C – 50°C (34°F – 122°F)
Power Supply
100 – 240 VAC, 47 – 63 Hz, 80VA
Insulation Rating
Double Insulated, Pollution Degree 2, Overvoltage Category II
Environmental Conditions
Not recommended for outdoor use.
Altitude up to 2000 meters.
Up to 95 % RH (non-condensing).
Enclosure Rating
Designed to meet IP 66 /NEMA 4X
Regulatory Compliance
And Certifications
White Light Version compliant to U.S. EPA 180.1
Infrared Version compliant to ISO 7027
CE Approved, ETL listed to UL 61010B-1 &
ETL Certified to CSA 22.2 No. 1010-1-92
Shipping Weight
2.5 kg (5.5 lbs.)
Warranty
2 Years from date of shipment
2
1. Overview
The AM-TBR process turbidimeter allows for the measurement of the turbidity of process water
on-line. The white light AM-TBR has been designed to meet the design criteria specified by the
US EPA 180.1 on turbidity measurement. The infrared AM-TBR was designed to meet the
design criteria specified in ISO 7027 and DIN 27027 for the measurement of the turbidity of a
sample. All models have long life lamps.
Some models have ultrasonic cleaning. Refer to 8.2 for more information.
A pressure regulator on the incoming line is standard on all AM-TBR models and will
reduce pressures up to 1380kPa (200 PSI) down to (104kPa) 15 PSI.
1.1. The AM-TBR Series
The AM-TBR series instruments have two light source options available, and two range options
available. The only other options are the built-in ultrasonic cleaning, and the flow alarm relay.
All units have user selectable 4-20 mA or Modbus over RS-485 outputs. Refer to the table below
to determine which factory installed options are available. Add the postfix –A to the model
number for the alarm option.
Model Number
Illumination
Type
Range NTU
Ultrasonic
Cleaning
AM-TBR2 WL
White Light
0-1000
No
AM-TBR2 IR
Infrared
0-1000
No
AM-TBR3 WL
White Light
0-100
Yes
AM-TBR3 IR
Infrared
0-100
Yes
AM-TBR4 WL
White Light
0-1000
Yes
AM-TBR4 IR
Infrared
0-1000
Yes
1.2. Unpacking and Inspection of the Instrument and Accessories
The table below indicates the items in the turbidimeter shipment.
Item
Quantity
AM-TBR Turbidimeter c/w Field Terminal Box & Flow Through Assembly
1
Instruction Manual
1
Desiccant Pack
1
Cuvette (Single Pack)
1*
Tubing Kit: 1-shutoff clamp
1-backpressure valve
2-connecting tubing with fittings for flow through assembly
1-drain vent screw (used in pressurized systems)
1
3
*Note: The spare cuvette (single pack) is only included for models AM-TBR2.
Remove the instrument from the packing carton. Carefully inspect all items to ensure that no
visible damage has occurred during shipment. If the items received do not match the order,
please immediately contact the local distributor or the Water Analytics Customer Service
department.
1.3. The Display
Figure 1 illustrates all the items that can appear on the display. The upper row of the display (1)
is used for reporting the turbidity levels and to provide user guidance in the customer setting
routine. The lower row of the display (2) is used to communicate error messages and provide
user guidance. The display has two icons (3) that are used to indicate the use of access code
and offset mode. In addition, mode arrows (4) are used to indicate the current instrument
operating mode; AUTO (normal operation), CAL (calibration) and CONFIG (configuration).
1.4. The Touch Pad
Figure 2 illustrates the touch pad. The touch pad has four buttons: MODE/EXIT, ↵, , and .
The MODE/EXIT button is used to cycle between the three operational modes of the instrument:
CAL, CONFIG, and AUTO (Measurement) mode. The ↵ button enters the option (or mode that
is highlighted or chosen. The and buttons are used to change settings.
Figure 1 - Display used in the instrument.
All items used on the display are shown in this
4
Figure 2 - Touch Pad
1.5. Vapor Purge
The AM-TBR is equipped with a continuous vapor purge system. A replaceable desiccant pouch
in the lower portion of the instrument dries the air. System heat is used to warm the air. A fan
inside the instrument continuously circulates heated dry air around the optical well and the flow
through cuvette. This feature eliminates the need for a dry purge line.
The AM-TBR monitors the replaceable desiccant pouch condition continuously. The LCD display
will show DESC on the lower line in the event that the desiccant pouch needs replacement.
Replacement desiccant pouches are available from Water Analytics or the local representative
(Part# 21555R). Refer to section 10.2
The desiccant can activate an alarm to notify the operator of a saturated desiccant. See section
7.15.
Note: Prior to installing the desiccant pouch for the first time the shipping support must be
removed. This tube can be discarded after installation.
5
2. Safety
This manual contains basic instructions that must be followed during the commissioning,
operation, care and maintenance of the instrument. The safety protection provided by this
equipment may be impaired if it is commissioned and/or used in a manner not described in this manual.
Consequently, all responsible personnel must read this manual prior to working with this
instrument.
In certain instances Notes, or helpful hints, have been highlighted to give further clarification to
the instructions. Refer to the Table of Contents to easily find specific topics and to learn about
unfamiliar terms.
3. Installation and Commissioning
Prior to use for the first time, the supplied desiccant pouch will need to be installed. Refer to
section 10.2.
3.1. Mounting & Site Selection
The instrument is designed for wall mounting. If wall mounting is not practical, the instrument
can be mounted on any suitable level surface. For ease of service there should be about 20 cm
(8”) free area above the instrument; this will ensure enough room for calibration and cuvette
maintenance. Choose a location that is easily accessible for operation and service and ensure
that the front display rests at eye level. The overall mounting dimensions of the instrument are
shown in Figure 3. The recommended mounting screws are M6 (¼”) for the instrument
enclosure and M4 (#8) for the field terminal box. The AM-TBR is designed to have the field
terminal box cradled under the sensor portion of the instrument. It is recommended that the field
terminal box be mounted first, and then the rest of the instrument be mounted on top. The
template on the last page of this manual may be used to establish mounting hole locations.
6
Figure 3 - Overall Mounting Dimensions of the Instrument
It is critical that the instrument be mounted as close as possible to the sampling point to ensure a
quick response time (within 2-3 meters (6-10 ft) of the sampling point).
3.2. Plumbing
The recommended plumbing for the instrument is shown in Figure 4. The instrument is designed
to require very little head pressure to operate; around 6.9kPa (1 PSI). The flow through cuvette is
rated for a flow of 100ml/min. – 1 liter/min. (0.026-0.26Gal/min). The integral pressure regulator
is rated for a maximum pressure of 1380 kPa (200 PSI.). The maximum allowable fluid
temperature is 50°C (122°F).
7
Figure 4 - Recommended Plumbing for the Instrument
The instrument is equipped to be plumbed using 4.75 mm (3/16”) ID, 8 mm (5/16”) OD flexible
tubing. Opaque tubing should be used if the tubing will be exposed to sunlight, to prevent algae
growth.
In figure 4, there are two flow devices shown. The one on the input side is a shutoff clamp used
during cuvette maintenance. The other device is a backpressure valve. Backpressure may be
required to prevent air from coming out of solution, which may be observed as tiny air bubbles.
3.2.1. Drain Vent:
The AM-TBR has been fitted with a drain vent in the “OUT” bulkhead fitting. This fitting allows for
atmospheric equalization, thus helping to alleviate bubble formation in the cuvette. Refer to
Figure 4.
Upon initial flow minor leakage may occur through the drain vent. This will subside once normal
flow is established.
For some high pressure systems, where the vent hole continuously leaks, a 6:32 seal screw is
provided which should be inserted into the vent hole and tightened.
8
The sensor drain tubing MUST be routed to a suitable drain. DO NOT reintroduce the drain
sample to the process stream. This is due to the fact that the wetted materials are not FDA
approved. See below for more information.
3.2.2. Wetted Materials:
Water Analytics accepts no responsibility for damage caused by the introduction of vapors, fluids
or other materials into the instrument process stream which is not compatible with the
instrument’s wetted materials. A list of the wetted materials can be found in the specifications on
page 1 of this manual.
3.3. Electrical Connections
All of the electrical connections to the instrument are made through the field terminal box, which
should be located directly under the sensor portion of the instrument. The connections are
labeled within the terminal box and are self-descriptive (see Figure 5). Please follow all local and
government recommendations and methods for installation of electrical connections to and
between the instrument and other peripheral devices.
Plugs are inserted into the alarm and 4-20mA/RS-485 cable bulkheads when shipped, to ensure
a watertight seal. These plugs should be removed and discarded when cabling to either of these
connections.
The power cable bulkhead will accept cable diameters from 5.8mm (.230 in.) up to 10 mm (.395
in.). All terminals are designed to accept wires in the range of 14-28 AWG. All wires should be
stripped to a length of 6 mm (¼”). A strain relief strap is provided to reduce tension on the power
terminals.
It is the user’s responsibility to assure that the watertight seal is maintained after the terminal box
has been wired for operation. If any of the bulkheads are not tightened properly around a cable
or plug, the ratings of the instrument will be jeopardized and there is a possibility of creating a
shock hazard.
Note: Only qualified electricians should be allowed to perform the installation of the instrument
as it involves a line voltage that could endanger life.
9
Figure 5 - Electrical Connections for the Instrument
3.3.1. Power
The instrument is equipped with a 100-240 VAC, 47-63 Hz switching power supply; please verify
that the line voltage falls within these specifications. It is recommended that a circuit breaker be
placed prior to the power connection to allow for service. While making connections, refer to
Figure 5. The AM-TBR is not supplied with a power cord.
3.3.2. RS-485
The RS-485 half-duplex (2-wire) digital interface operates with differential levels that are not
susceptible to electrical interferences. This is why cable lengths up to 3000 ft can be
implemented. The last device on each bus may require terminating with a 120-ohm resistor to
eliminate signal reflection on the line. Do not run RS-485 cables in the same conduit as power.
To prevent damage to the instrument, ensure that power is disconnected prior to making
connections. For ease of connecting, remove the plug in terminal block. Connections are labeled
beneath this termination.
3.3.3. Relays
The Alarm 1 and Alarm 2 relays are mechanical relays rated at 240 VAC 2A. Please note that
the relays are labeled NO (Normally Open), NC (Normally Closed) and C (Common). As these
alarms are configured fail-safe, the normal condition is with power applied to the AM-TBR and in
a non-alarm condition. Operation of these alarms is covered in section 7.5 Configuring the
Alarms.
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