HF scientific 19944 User Manual
OWNERS MANUAL
HF – Triple Validation Turbidimeter
0-10, 0-100 NTU
3170 Metro Parkway
Ft. Myers, FL 33916
239-337-2116
Catalog No. 22569 (5/02)
Rev. 1.7 (.pdf)
HF scientific, inc.
DECLARATION OF CONFORMITY
Application of Council Directive
Standard to which Conformity is Declared:
Product Safety - Tested and passed CE EN61010-1:1990 + A1:1992 (73/32 EEC)
Immunity and Emissions – Tested and passed EN61326:1998, Class A
Manufacturer’s Name: HF scientific, inc.
Manufacturer’s Address: 3170 Metro Parkway, Fort Myers, Florida 33916-7597
Importer’s Name:
Importer’s Address:
Type of Equipment: Process Turbidimeter
Model No: TVT2
Year of Manufacture: 2001, 2002
I, the undersigned, hereby declare that the equipment specified above conforms to the above
Directive and Standard
Place: Fort Myers, Florida USA
(Signature)
Robert J. Maley, President
TVT2 (5/02) i
Rev.1.7 (.pdf)
Table of Contents
Specifications.................................................................................................................................. 1
1.0 Overview................................................................................................................................. 1
1.1 Unpacking and Inspection of the Instrument and Accessories ........................................... 2
1.2 The Display......................................................................................................................... 2
1.3 The Touch Pad .................................................................................................................... 3
2.0 Safety ...................................................................................................................................... 4
3.0 Installation and Commissioning ............................................................................................. 5
3.1 Mounting & Site Selection.................................................................................................. 5
3.2 Plumbing............................................................................................................................. 6
3.3 Electrical Connections ........................................................................................................ 6
4.0 Normal Operation ................................................................................................................... 8
4.1 Routine Measurement .........................................................................................................9
4.2 Security Access Feature...................................................................................................... 9
5.0 Instrument Calibration .......................................................................................................... 10
5.1 Calibration Standards........................................................................................................ 11
5.2 Calibration Procedures...................................................................................................... 11
6.0 Calibration by Comparison to Laboratory Measurements (Instrument Offset).................... 14
7.0 Instrument Configuration (Range)........................................................................................ 16
7.1 0-100 NTU Range Selection............................................................................................. 16
8.0 Instrument Configuration (SETUP Mode)............................................................................ 16
8.1 Displayed Resolution........................................................................................................ 16
8.2 Setting the Year................................................................................................................. 17
8.3 Setting the Day and Month ............................................................................................... 17
8.4 Setting the Time................................................................................................................ 18
8.5 Programming the Alarms.................................................................................................. 19
8.5.1 Alarm 1 ..................................................................................................................... 19
8.5.2 Alarm 2 ..................................................................................................................... 20
8.6 Setting the Analog Output (O/P)....................................................................................... 21
8.7 Configuring the RS 485 I/O Port ...................................................................................... 22
8.8 Setting the Security Access Option................................................................................... 25
9.0 Troubleshooting/System Alarm Relay.................................................................................. 26
9.1 System Warning Message(s)............................................................................................. 26
9.2 System Error Message ...................................................................................................... 26
9.3 Technical and Customer Assistance ................................................................................. 27
10.0 Routine Maintenance ........................................................................................................ 27
10.1 Cleaning the Optical Chamber (Sample Tube)............................................................. 27
10.2 Replacing the Desiccant Cartridge................................................................................ 27
11.0 Accessories and Replacement Parts List........................................................................... 29
12.0 Warranty ........................................................................................................................... 30
TVT2 (5/02) ii
Rev. 1.7 (.pdf)
Specifications
Measurement Range 0.01 –100.0 NTU
Accuracy
Resolution 0.0001 NTU on low readings
Response Time Less than 8 seconds
Display Multi-Line Liquid Crystal Display
Two User Programmable
Alarms
Analog Output Signals 4 - 20 mA
Water Pressure 0.1 - 8 bar (1-116 psi.)
Flow Rate 0.5 Liter/min. regulated (.26 Gal/min)
Operating Temperature Range 1°C – 50°C (34°F – 122°F)
Sample Temperature Range 1°C – 50°C (34°F – 122°F)
Power Supply Voltage 90 – 250, 47 – 90 Hz
±2% of reading plus 0.01 NTU (0-10 NTU)
±5% of reading plus 0.1 NTU (10-100 NTU)
120-240VAC 2A Form C Relay with suppressors
Power Consumption 6 VA
Insulation Rating Pollution Degree 2,
Overvoltage Category II
Regulatory Compliance (010NTU)
Approximate Dimensions 175mm W x 310mm H x 225mm D (6.875” W x 12.25” H x
Shipping Weight 2.5 kg (5.5 lbs.)
Warranty 1 Year from date of shipment
White Light Version compliant to U.S. EPA 180.1
Infrared Version compliant to ISO 7027
8.875” D)
TVT2 (5/02)
Rev. 1.7 (.pdf)
1
1.0 Overview
The TVT process turbidimeter allows you to measure the turbidity of your process water
on-line. The White Light TVT has been designed to meet the design criteria specified by
the US EPA on turbidity measurement. The Infra-Red TVT was designed to meet the
design criteria specified in ISO 7027 and DIN 27027 for the measurement of the turbidity
of a sample.
1.1 Unpacking and Inspection of the Instrument and Accessories
The table below indicates the items that you should find in your turbidimeter shipment.
Item Part # Quantity
TVT Turbidimeter 19943 (White Light Version), or
19944 (Infrared Version)
Instruction Manual 22569 1
Sample Tube Cleaning Brush 22698 1
Black Nylon Semi-Rigid Tubing 22740 10 ft.
Desiccant Cartridge 19610 1
Remove the instrument from the packing carton. Carefully inspect all items to ensure
that no visible damage has occurred during shipment. If the items you received do not
match your order, please immediately contact your local distributor or the HF scientific,
inc. Customer Service department.
1.2 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 user guidance. The display has several status indicators (3) that distinguish
the operation of the instrument. In addition there are several indicators that display the
different scales (4) that the instrument will report. Other indicators (5) provide guidance
when the setup and calibration routines are being used.
1
TVT2 (5/02)
Rev. 1.7 (.pdf)
2
Figure 1 – Display used in the instrument.
All items used on the display are shown in this figure
1.3 The Touch Pad
Figure 2: The Instrument touch pad.
Figure 2 illustrates the touch pad. The touch pad has four buttons: MODE,
↵↵↵↵, t,
and
u. The MODE button is used to cycle between the three operational modes of the
instrument: CAL, SETUP, and AUTO (Measurement) mode. The
option (or mode) that is highlighted or chosen. The tand u buttons are used to scroll
through lists and to increase or decrease settings.
↵↵↵↵
button enters the
TVT2 (5/02)
Rev. 1.7 (.pdf)
3
2.0 Safety
This manual contains basic instructions that you must follow 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.
All relay contacts are held at the last valid condition and will not change state while the
instrument is in the calibration and/or in the configuration mode. In addition, in these
modes, the instrument has a time-out feature that automatically returns the system
operation to the normal operation mode from any other mode after a five (5) minute
period of inactivity.
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.
TVT2 (5/02)
Rev. 1.7 (.pdf)
4
3.0 Installation and Commissioning
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 45cm (18”) free area above the instrument; this will ensure enough room for
calibration and cleaning the optical well. 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 (four are required) are M6 (or ¼”).
It is critical that the instrument be mounted as close as possible to the sampling point to
ensure an accurate reading of turbidity (within 6-10 ft of the sampling point).
TVT2 (5/02)
Rev. 1.7 (.pdf)
Figure 3: Overall Mounting Dimensions of the Instrument
5
3.2 Plumbing
The recommended plumbing for the instrument is shown in Figure 4. The instrument is
designed to limit the flow to the range of 0.4 – 0.6 liters/minute depending on the system
backpressure. Ensure that you supply the instrument with a process flow capable of
sustaining this level. Quick-connect fittings are supplied on the inlet and outlet of the
instrument; these fitting help speed up calibration procedures. These fittings will accept
0.25” OD x 0.170 ” ID tubing. Opaque tubing should be used if the tubing will be
exposed to sunlight.
3.3 Electrical Connections
All of the electrical connections to the instrument are made through the field terminal box
located on the lower section of the instrument. The connectors are labeled on the
instrument 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.
TVT2 (5/02)
Rev. 1.7 (.pdf)
Figure 4: Recommended Plumbing for the Instrument
6