Watts HF scientific AccUView LED Installation instructions

Instructions for Operation and Maintenance
AccUView LED
UV Transmittance and Absorbance Monitor
IS-HF-AccUViewLED
WARNING
!
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information can
result in death, serious personal injury, property damage, or
damage to the equipment.
Keep this Manual for future reference.
IS-HF-AccUViewLED 2239

2
DECLARATION OF CONFORMITY
Application of Council Directive
Standards to Which Conformity is Declared:
Product Safety – Tested and passed:
Part 1: General Requirements UL61010-1 Issued May 11 2012 Ed 3 and CAN/CSA
C22.2 #61010-1 issued May 11 2012
Conforms to UL STD 61010-1
Certied to CSA STD C22.2 No. 61010-1
Emissions & Immunity – Tested and passed EN 61326-1:2013
Manufacturer’s Name: HF scientic, inc.
Manufacturer’s Address: 16260 Airport Park Drive, Suite 140, Fort Myers, Florida 33913
Importer’s Name:
Importer’s Address:
Type of Equipment: Process UV %Transmittance Analyzer
Model No: AccUView LED
Part Numbers 28041 & 28042 (with Flow Switch)
I, the undersigned, hereby declare that the equipment specied above conforms to the above Directives and Standards.
Place: Fort Myers, Florida USA
Date: 12 December 2022 (Signature)
Nick Ganzon
VP of Global Electronics
and Water Quality

3
Table of Contents
1.0 Understanding Safety Information.................................................4
1.1 Symbols Used in this manual ....................................................4
2.0 Introduction to the Unit .................................................................4
2.1 Overview...................................................................................4
2.2 Specifications ...........................................................................4
2.3 Unpacking and Inspection of the Instrument and Accessories...4
2.4 Display......................................................................................5
2.5 Touch Pad ................................................................................5
2.6 Vapor Purge..............................................................................5
3.0 Installation and Commissioning.....................................................5
3.1 Mounting and Site Selection .....................................................5
3.2 Plumbing ..................................................................................6
3.2.1 Pressurized Systems..........................................................6
3.2.2 Drain Vent ..........................................................................6
3.3 Electrical Connections ..............................................................7
3.3.1 Power ................................................................................7
3.3.2 RS-485..............................................................................7
3.3.3 Relays................................................................................7
3.3.4 4-20 mA ............................................................................7
4.0 Operation .....................................................................................8
4.1 Warm-up ..................................................................................8
4.2 Routine Measurement...............................................................8
4.3 Security Access Feature ...........................................................8
4.4 Initial Operation.........................................................................8
5.0 Instrument Calibration...................................................................9
5.1 100%T Calibration ....................................................................9
5.2 ABS Calibration ........................................................................9
5.2 Calibration Error......................................................................10
6.0 Restore Factory Settings ............................................................10
6.1 Restoring Factory Settings......................................................10
7.0 Instrument Configuration (CONFIG mode)...................................10
7.1 Selecting the Output (O/P) ......................................................10
7.2 Setting the 4-20 mA ...............................................................10
7.2.1 Setting the 4 mA Level.....................................................10
7.2.2 Setting the 20 mA Level...................................................11
7.2.3 Setting the Error Level......................................................11
7.3 Configuring the RS-485 Port...................................................11
7.3.1 Setting the Baud Rate......................................................11
7.3.2 Setting the Address .........................................................11
7.4 Configuring the Alarms ...........................................................11
7.4.1 Alarm 1 ............................................................................12
7.4.2 Alarm 2 ............................................................................12
7.5 Enabling the Security Access..................................................12
7.6 Extended Settings ..................................................................12
7.7 Units.......................................................................................12
7.8 Speed of Response ................................................................12
7.9 LCD Backlight Brightness .......................................................12
7.10 Ultrasonic Cleaning...............................................................13
7.11 RS-485 Parameter - Bits ......................................................13
7.12 RS-485 Parameter - Parity....................................................13
7.13 RS-485 Parameter – Stop Bits..............................................13
7.14 Duty Cycle ............................................................................13
7.15 Desiccant Alarm ...................................................................13
7.16 4 mA Adjustment..................................................................13
7.17 20 mA Adjustment................................................................14
7.18 Saving Configuration Settings ...............................................14
8.0 Additional Features and Options.................................................14
8.1 Backlit LCD ............................................................................14
8.2 Ultrasonic Cleaning.................................................................14
8.3 RS-485 Output .......................................................................14
8.3.1 HF Online.........................................................................14
8.3.2 Simple Communication....................................................15
8.3.3 Modbus Communication .................................................15
8.4 Flow Alarm..............................................................................15
9.0 Routine Maintenance..................................................................15
9.1 Cleaning the Flow Through Cuvette ........................................15
9.2 Replacing or Installing the Desiccant Pouch............................15
9.3 Replacing the Source Lamp....................................................15
10.0 Troubleshooting........................................................................16
10.1 AccUView LED Fault Detection .............................................16
10.2 System Fail Message ...........................................................16
10.3 Diagnostic Chart...................................................................16
10.4 Technical and Customer Assistance......................................16
11.0 Accessories and Replacement Parts List ..................................17
12.0 Warranty...................................................................................20

4
2.0 Introduction to the Unit
2.1 Overview
The AccUView LED process transmittance monitor allows for the UV
transmittance or absorbance measurement of process water on-line.
A unique feature of the instrument is the ultrasonic cleaning.
Refer to section 8.2 for more information.
2.2 Specifications
Measurement Range 0 – 100.0 %T
0 – 2.0 ABS
Repeatability ± 1.0 %T
± 0.002 ABS
Resolution 0.1 % T
0.0004 ABS
Accuracy ± 2.0 % T
± 0.008 ABS
Response Time Adjustable Averaging
Path Length 22 mm (Readings corrected to 10 mm)
Display Multi-Line Liquid Crystal Backlit Display
Alarms Two Programmable, 120-240VAC 2A Form C Relay
Analog Output Powered loop isolator 4-20 mA, 600 Ω drive
Communications Port Optional bi-directional RS-485 with Modbus
Maximum Water Pressure 1380 kPa (200 psi.) with integral pressure regulator
Flow Rate 100 ml/min. – 1.5 liter/min. (.026-.40 Gal/min)
Operating Temperature 0°C – 50°C (32°F – 122°F)
Wetted Materials Nylon, Quartz, Silicone, Polypropylene, Stainless Steel
Sample Temperature Range 0°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 ABS
Regulatory Compliance
and Certifications
CE Approved, Listed to UL 61010-1 3rd edition: 2012
Certified to CAN/CSA C22.2 No. 61010-1: 2012
EMC: EN61326-1: 2013
Shipping Weight 2.5 kg (5.5 lbs.)
Warranty 1 Year from date of shipment
2.3 Unpacking and Inspection of the
Instrument and Accessories
The table below indicates the items in the monitor shipment.
Item Quantity
AccUView LED Monitor c/w Field Terminal Box and Flow Through Assembly 1
Instruction Manual 1
Desiccant Pack 1
Quartz Cuvette with Ultrasonic Transducer (Single Pack) 1
100 % T Calibration Standard 1
Tubing Kit * 1
* Note - Tubing Kit includes:
1-shutoff clamp
1-backpressure valve
2-connecting tubings with fittings for flow through assembly
1-drain vent screw (used in pressurized systems)
Refer to Figure 4.
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 HF scientific Customer Service department.
This symbol identifies hazards which, if not avoided,
could result in minor or moderate injury or damage
to the equipment.
This symbol identifies important information,
practices or actions.
This pictorial alert you to the need read the manual,
possibly at a different section.
This pictorial alerts you to electricity, electrocution
and shock hazards.
1.0 Understanding Safety
Information
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 icons or symbols have been added to give further
clarification to the instructions. Refer to the Table of Contents to easily
find specific topics and to learn about unfamiliar terms.
1.1 Symbols Used in this manual
CAUTION
!
NOTICE

5
2.4 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 % T 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. All error messages will be added to a queue along with
the units (%T). 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).
2.5 Touch Pad
Figure 2 illustrates the touch pad. 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 figure
3.0 Installation and Commissioning
Prior to use for the first time, the supplied desiccant pouch
will need to be installed. Refer to section 9.2 Replacing or
Installing the Desiccant Pouch.
3.1 Mounting and Site Selection
The instrument is designed for wall mounting. 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 (3⁄16") for the field terminal
box. The AccUView LED 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 included on the last page of this manual
may be used to establish mounting-hole locations.
Figure 2: The AccUView LED touch pad
2.6 Vapor Purge
The AccUView LED 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 AccUView LED 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 HF
scientific, or the local representative (Part # 21555R). Refer
to section 9.2 Replacing or Installing the Desiccant Pouch
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).
Provide at least 200mm
(8 inches) of free space
for easy removal of the
flow head and insertion of
the calibration standards
All dimensions are in
millimeters (inches)
These 4 holes will
accept up to M6
(¼ inch) hardware
207.65
(8.175)
50.80
(2.000)
90.17
(3.500)
These 2 holes will
accept up to M4
(3⁄16 inch) hardware
87.33
(3.438)
30.17
(1.188)
147.66
(5.813)
131.16
(5.164)
347.16
(13.668)
61.77
(2.432) 196.85
(7.750)

6
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). Flow requirements are 100ml/min. – 1.5 liter/min.
(0.026-0.40Gal/min). The pressure regulator will allow for a maximum
pressure of 1380kPa (200 PSI.). The maximum allowable fluid
temperature is 50°C (122°F).
An optional flow regulator Cat# 19778 can limit flow to around 1 liter/
min. this is not recommended for applications involving sea water.
Figure 4: Recommended Plumbing for the Instrument
Intake Tubing
Connection
4.75mm (3⁄16 inch)
I.D., 8mm (5⁄16 inch)
O.D. tubing should
be connected here
to supply the sensor
with a dependable
sample flow
Drain Vent
Leave open for
gravity-feed and
open-drain systems.
Plug with a #6-32
sealscrew for
pressurized systems.
See manual for
details
Backpressure
Valve
This valve allows
adjustment of the
amount of back
pressure, which
will help to control
flow rate and
eliminate small
bubbles
Shutoff Clamp
This clamp
allows for
shutoff of the
intake flow
during cuvette
cleanings and
replacements
Drain Tubing
Connection
4.75mm (3⁄16 inch)
I.D., 8mm (5⁄16 inch)
O.D. tubing should
be connected here
to route the sensor
drain tubing to a
suitable site drain
Connector Assembly
Insert
Nut
Tubing
(not supplied)
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.
Model 28042 is equipped with a flow switch. For this instrument
the user connections are equipped with ¼" push-to-connect
connections. The suitable tubing is polymer or copper tubing
with a ¼ inch OD. These connectors cannot be used with
stainless steel tubing.
NOTICE
In figure 4, there are two operator controlled flow adjustment devices
shown. The one on the input side is a shutoff clamp used during cuvette
maintenance. The other device, located on the output side of the flow cell,
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 Pressurized Systems
A standard feature of the AccUView LED is a pressure regulator. The
regulator is rated for use up to 1380 kPa (200 PSI) and will lower the
pressure down to a pressure more suitable for use in the AccUView
LED. If inlet pressures can exceed 325 kPa (47 PSI) use appropriate
tubing to connect to the AccUView LED. An optional flow regulator can
be used to limit the flow to 1 liter per minute.
3.2.2 Drain Vent
The AccUView LED 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.
The drain water from this instrument should NEVER be reintroduced
back into the incoming water stream. This water MUST be directed
to a convenient drain.
NOTICE

7
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.
Figure 5: Electrical Connections for the Instrument
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.
Only qualified electricians should be allowed to perform
the installation of the instrument as it involves a line
voltage that could endanger life.
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 AccUView LED is not supplied
with a power cord.
3.3.2 RS-485
The RS-485 Modbus or special protocol half-duplex (2-wire) digital
interface operates with differential levels that are less 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
AccUView LED and in a non-alarm condition. Operation
of these alarms is covered in section 7.4 Configuring
the Alarms.
3.3.4 4-20 mA
The 4-20 mA output is driven by a 15 VDC power source and can
drive recorder loads up to 600 ohms. Do not run 4-20 mA cables in
the same conduit as power. Operation of this output is
covered in section 7.2 Setting the 4-20 mA. The outputs
are equipped standard with an installed loop powered
isolator (500V isolation).
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. Polarity of the connections is labeled
beneath this termination.
Sensor
Interconnect
Cable
Field Terminal Box
(with lid removed)
Liquid Tight Plugs
Power
Cable
Bulkhead
Alarm
Cable
Bulkhead
4-20mA/
RS-485
Cable
Bulkhead
Power Supply
Terminal Block
Alarms
Terminal Block
240 VAC 2A
4-20mA/RS-485
Terminal Block
Power Cable
Strain Relief

8
4.0 Operation
This process monitor allows for the measurement of the transmittance
of process water on-line. Process water is usually reported in units
of %T. Readings above 102 %T are indicated by a flashing display.
Readings above 100 %T indicate that the current sample is better than
the calibration water. Readings above 110 %T are not possible. All
readings are path length corrected to 10 mm.
Alternately measurements can be taken in Absorbance. Negative
Absorbance readings indicate the need for a calibration or that the
water tested is better that what the instrument was calibrated to. These
readings show ABS on the lower line of the display. All readings are
path length corrected to 10 mm
During normal operation, the instrument will have the arrow beside
AUTO. The scale (% T or ABS) is displayed on the lower row of the
display and the measured reading on the upper row of the display
(see illustration below). The user needs to keep in mind
that the instrument only updates at periods determined in
the configuration or CONFIG menu. Refer to section 7.14
Lamp Duty Cycle.
4.1 Warm-up
Upon power-up the AccUView LED will require a warm-up period of about
30 minutes. For improved accuracy, allow the AccUView LED to compete
warm-up time prior to calibrating. During the warm-up period, the display
may flash indicating that it has detected a temperature change. It is normal
for this to occur during the warm-up period.
4.2 Routine Measurement
The following steps describe how to measure the % T or ABS of a sample
using this instrument:
1. Apply power to the instrument and allow the unit an initial warm up
of 30 minutes.
2. When a continuous process stream is flowing through the
instrument, the instrument will display the measured % T or ABS
level of the sample by displaying it on the LCD screen. In addition,
the equivalent signal is provided on the analog (4-20 mA) output, or
the digital output, depending on the options selected.
A flashing display may occur after warm-up. This is an
indication that either the ambient or the water temperature
or has changed rapidly. During this time the readings may be
slightly out of the specified accuracy. The AccUView LED will
automatically compensate as soon as the rate of temperature
change slows.
NOTICE
4.3 Security Access Feature
The instrument is equipped with a security access code feature that can
be activated in the configuration mode. If the security feature is enabled,
the screen shown in the illustration below will appear when the MODE/EXIT
button is pressed.
The security code (333) must be entered to gain access to CAL or
CONFIG menus. Notice that the first number in the code is flashing.
The flashing indicates that this is the number to be entered. Use the
or arrows to select the first of the three numbers in the code and
then press the button to accept the first number of the code. Now
enter the second number in the code. Proceed as with the first number
followed by . Then repeat the process for the third number in the
access code, and finish with the button.
If the valid access code has been selected, the instrument will be
directed to the calibration mode. If the CONFIG mode is needed push
the MODE/EXIT button one more time.
If the wrong access code is selected, the instrument will
return to the AUTO mode. Refer to section 7.6 Enabling the
Security Access for more information.
4.4 Initial Operation
It is recommended to check that cuvette is tightly installed on the flow
through unit prior to the introduction of water. These are pressure checked
at the factory but due to shipping the cuvette could have loosened.
For the best accuracy an initial calibration is recommended. These are all
factory calibrated but the best accuracy is achieved by calibrating with
DI water with the flow through locked in place prior to calibration. Do not
move the flow through after calibration, but simply start the fluid flow. Refer
to the next section for complete calibration instructions.

9
5.0 Instrument Calibration
The instrument was calibrated and tested prior to leaving the factory.
Therefore, it is possible to use the instrument directly out of the box.
Under normal conditions, re-calibration is recommended at least once
every month. To get the greatest accuracy, you may need to calibrate
once per week.
Two cuvettes are supplied with the instrument so that they can be
exchanged with each other. One cuvette should always be kept clean
for replacement when calibrating.
The instrument is designed to store the last reading prior to calibrating.
Relay contacts are held at the last valid condition and will not change
state while the instrument is in the calibration mode. The 4-20 mA is
also held at this stored reading and will not change until is calibration
is complete. Thirty seconds after completion of the calibration the
AccUView LED will start will start taking online measurements which will
be averaged with the stored reading (depending on setting). In order
to prevent disruptions in data the operator should release the clamp to
allow the sample water to flush out the calibration water as soon as the
calibration is completed.
While in the calibration mode, the instrument has a time-out feature
that automatically returns the system operation to the AUTO mode
after a fifteen (15) minute period of inactivity.
5.1 100 %T Calibration
1. Select the calibration function of the instrument by pressing
the MODE/EXIT button once. The arrow beside CAL will be
illuminated on the display. The lower display shows alternating
100 (indicating that the 100%T standard is requested) and .
The last reading has now been stored and the equivalent reading is
being output on the 4-20mA signal. This output will be held after the
instrument returns to AUTO, allowing time for the flow to be restarted.
2. Close off the flow of water using the shutoff clamp.
3. Remove the flow through cuvette, and retain for future cleaning
and use.
4. Fill the second clean cuvette with 100% T calibration fluid and
reinstall the filled cuvette tightly on the flow through unit.
5. Wipe flow through unit dry, install and lock in place.
6. Press the button to start the calibration.
7. The upper display will count down the progress of the calibration step.
8. The instrument will return to AUTO mode at the end the calibration.
9. The shutoff clamp should now be released to restore sample flow.
10. Do not move flow head after calibrating.
Before starting the calibration procedure, be sure to turn off
the instrument’s ultrasonic cleaning option. See section 7.10
for instructions.
NOTICE
5.2 ABS Calibration
1. Select the calibration function of the instrument by pressing
the MODE/EXIT button once. The arrow beside CAL will be
illuminated on the display. The lower display shows alternating 0
(indicating that the 0.000ABS standard is requested) and . Once
in the calibration menu the last reading has now been stored and
the equivalent reading is being output on the 4-20mA signal. This
output will be held after the instrument returns to AUTO, allowing
time for the flow to be restarted.
2. Close off the flow of water using the shutoff clamp.
3. Remove the flow through cuvette, and retain for future cleaning and use.
4. Fill the second clean cuvette with 100% T/0.000 ABS calibration fluid
and reinstall the filled cuvette on the flow through unit.
5. Wipe flow through unit dry, install and lock in place.
6. Press the button to start the calibration.
7. The upper display will count down the progress of the calibration step.
8. The instrument will return to AUTO mode at the end the calibration.
9. The shutoff clamp should now be released to restore sample flow.
10. Do not move flow head after calibrating.
Since the instrument stored the reading previous to calibration, the
previous reading may appear after calibration for at least 30 seconds. The
reading will then update to the current reading. How fast this upgrades
occurs depends on the CONFIG settings for RESP (response time) and
UV-T (lamp duty cycle).
There is no need to recalibrate when changing ranges from %T to ABS or
the reverse.
It is recommended that the flow through unit be removed for as
short an interval as possible to prevent premature saturation of
the desiccant.
NOTICE
CAUTION
!
The UV lamp is of very low power but is recommend to avoid
looking directly into the optical well while the flow through unit
is removed.
Before starting the calibration procedure, be sure to turn off
the instrument’s ultrasonic cleaning option. See section 7.10
for instructions.
NOTICE

10
5.3 Calibration Error
If the screen shown below is displayed after the 100%T or 0 ABS
calibration, the internal diagnostics have determined that the calibration
fluid requires replacement or the flow through cuvette requires
replacement. Check, the calibration fluid and cuvette, then
recalibrate or restore the factory calibration see 6.1 Restoring
Factory Settings. The instrument cannot be used without
performing one of these operations.
To recalibrate press the MODE key and start the calibration sequence
again. To restore the factory calibration, push and hold the button.
Now push and release the then release the button.
6.0 Restore Factory Settings
6.1 Restoring Factory Settings
If the instrument is unable to perform a calibration due to a low lamp
output, bad calibration standard or a dirty cuvette, the instrument will
display CAL on the lower row of the display and Err on the upper
row. The operator has two choices to correct this problem or restore
the factory calibration. If the operator can determine whether a poor
calibration or a low lamp caused the problem, he/she can remedy
the problem and recalibrate. If all else fails, the operator may restore
the factory calibration and configuration settings by performing the
following operation. Push and hold the button. Now push and
release the then release the button. Factory calibration and
factory configuration have now been restored.
Restoring the factory settings allows the use of the AccUView
LED with reduced accuracy. The original problem still exists and
must be determined and corrected before accurate operation
of the AccUView LED will be resumed. The AccUView LED will
always reset to %T and factory defaults after restoring.
NOTICE
7.0 Instrument Configuration
(CONFIG mode)
The instrument has been designed to provide the ability to customize
the instrument according to needs at any time during normal operation.
This mode has been split into sub-menus to facilitate instrument
configuration. This section describes how to use each of the sub-
menus to configure the instrument. While in the configuration mode,
the instrument has a time-out feature that automatically returns the
system operation to the AUTO mode after a fifteen (15) minute period.
Enter the CONFIG mode of the instrument by pressing the MODE/EXIT
button until the arrow beside CONFIG is illuminated, then press
the button.
To exit the CONFIG mode, press the MODE/EXIT button.
NOTICE
7.1 Selecting the Output (O/P)
The first configuration selection is the O/P. The selections are:
1. 4-20 for the 4-20 mA output
2. 485 for the RS-485 and modbus
3. OFF if no outputs are required
Select the desired output by using the and buttons. Once the
desired output has been set, press the button to accept it. The next
prompts will depend on the output selected.
7.2 Setting the 4-20 mA
If the 4-20 mA output was turned on, prompts to set the 4mA (4MA) and
20mA (20MA) %T or ABS limits levels will be displayed. There is also a
menu to adjust the error level (ERLV). The first prompt will be the %T or
ABS limit assigned to the 4 mA output level.
7.2.1 Setting the 4 mA Level
Select the %T or ABS level to assign to the 4MA using the and 
buttons.
The factory setting is 90%T or.
Once the desired level has been set, press the button to accept it.
The factory default setting for %T is 90%T and the for ABS is 0
The 4MA cannot be set higher than the 20 MA level.
NOTICE

11
7.2.2 Setting the 20 mA Level
The next, prompt will be the %T or ABS level assigned to the 20 mA
output level (20MA) on the lower row of the LCD display). Select the %T
level to assign to the 20MA using the and buttons. Once the desired
level has been set, press the button to accept it.
The factory default setting for %T is 100%T and for ABS is 2.
The 20 MA cannot be set lower than the 4 MA level.
NOTICE
7.2.3 Setting the Error Level
In case of an error in the AccUView LED, the 4-20 mA reading can be
used to indicate a problem by sending the output to either:
1. 4.00 mA,
2. 2.00 mA
3. 0 mA
4. OFF. In the case of OFF, the 4-20mA is unaffected by any error
condition.
The factory default setting is OFF. Select the desired ERLV by using the
and buttons then press the button to accept the desired error
response.
7.3 Configuring the RS–485 Port
If the instrument is wired for this option, and the I/O selection is changed to
485, prompts will appear for setting the baud rate and the address.
7.3.1 Setting the Baud rate
Select the correct baud rate (1200, 2400, 4800, 9600, or 19200) for
operation of the I/O port by pressing the or buttons to change the
displayed baud rate.
The factory setting is 9600 baud.
Press the button to continue on and select the desired instrument
address using the or buttons. Once the selection is satisfactory,
press the button.
7.3.2 Setting the Address
The last selection is the address. This Address is important where multiple
instruments are wired on a single string. Each instrument MUST have a
unique Address.
The factory setting is Address 1
To enable the Modbus mode, select ASCII or RTU. For more information
refer to the Modbus Manual. The manual is also available as a free
download from our website at www.hfscientific.com.
7.4 Configuring the Alarms
Two relays are provided that are designed to operate as two independent
programmable alarms. Three types of information must be input to fully
program each alarm:
1. The alarm function (HI, LO, OFF or Error)
2. The alarm set point (level at which the alarm activates)
3. The delay time for the alarm: the time that the set point must be
exceeded prior to alarm activation and the time before resetting the
alarm (prevents chatter in the relay)
These three items are described below:
Alarm Function: The alarms can either be turned OFF or programmed to
operate in one of three different manners:
1. HI alarm: the relay changes state when the measured %T or ABS
level is higher than the programmed alarm level for a prescribed
amount of time.
2. LO alarm: the relay changes state when the measured %T or ABS
level is lower than the programmed alarm level for a prescribed
amount of time.
3. Error: the relay changes state when a system error occurs. If a
system error occurs a message will appear on the lower row of the
screen describing the problem.
Alarm Set Point: The level at which an alarm activates is called the
alarm set point. On the instrument, the alarm set point is designated as
“S/P”. The set point is adjustable to any valid %T or ABS level over the
range of the instrument in steps of 0.01 NTU.
Alarm Delay Time: The alarm delay times are used to prevent ringing
of the alarm when the measured %T or ABS level is close to the set
point. The function of the delay times is as follows:
Delay On: The %T or ABS level must exceed the alarm set point
continuously for at least this number of seconds before the alarm
activates.
If the delay on time is set at 5 seconds and the process %T or
ABS exceeds the set point continuously for only 4 seconds, the
alarm will not be activated. However, process %T or ABS exceeds
the set point continuously for 5 seconds or more, the instrument
will activate the alarm.
Delay Off: The %T or ABS level must not exceed the alarm set point
continuously for at least this number of seconds prior to deactivation
of the alarm.
If the delay off time is set to 5 seconds and the process has
exited out of the alarm condition, the alarm will be reset only if the
process is out of the alarm condition for a continuous 5 seconds.
Otherwise, the instrument will still signal an alarm condition.

12
7.4.1 Alarm 1
Alarm 1 Function: The ALM1 is displayed and the display indicates
the current function of alarm 1 (HI, LO, OFF or Error). Use the or
buttons to cycle through and select the desired function. Press the 
button to accept the selection.
If the alarm was turned OFF a prompt will appear to set up alarm 2
(go to section 7.4.2). If, on the other hand, one of the other functionalities
was selected a prompt will appear to set the delay times.
Alarm 1 Set Point: This prompt is used to select the set point for this
alarm; this is indicated by “S/P” shown on the lower row of the display.
Select the desired alarm level by using the and buttons. Once the
desired set point has been set, press the button to accept it.
Alarm 1 Delay Times: Delay On: The following display will appear to allow
to select the number of seconds currently set for the “delay on” time.
The current selected number of seconds will be shown. Select the
desired number of seconds for the “delay on” time for this alarm using
the and buttons. Once the desired delay time has been set, press
the button to accept it.
Delay Off: Next, the following display will appear to select the number
of seconds currently set for the “delay off” time.
The current selected number of seconds will be shown. Select the
desired delay off time for this alarm using the and buttons. Once
the desired delay time has been set, press the button to accept it.
After the settings for alarm 1 have been completed, prompts will allow
for the set up of the information on alarm #2.
7.4.2 Alarm 2
Repeat the procedure listed in section 7.4.1 to set up the parameters
for alarm 2. If one of the other functionalities is selected, a prompt
to set the delay times and the set point, as with Alarm #1, will be
displayed.
7.5 Enabling the Security Access
The instrument is equipped with a security access. If this option is turned
on, the user is required to input the access code into the instrument to get
to any mode other than AUTO. The only code is 333. This code may not
be changed. See section 4.3 for more information on this security feature.
The security key icon will be visible and flashing on the display whenever
the access option is selected using the or buttons. (On or OFF).
7.6 Extended Settings
The last few settings are grouped together to prevent them from being
adjusted by accident. To gain access to the extended settings, select On
using the or buttons and press the button.
7.7 Units
Select the preferred measurement parameter in either ABS shown or %T.
This selection will affect menus prior Extended Settings.
7.8 Speed of Response
The speed of response for both displayed and output values can be
adjusted in this menu. The factory setting is 3 however, 10 response
speeds are available. Select the desired speed of response using the 
and buttons. Press the button to accept it.
Please note that the response is simply an average of the previous
readings combined with the current reading. If the setting is 1, only current
readings are displayed. If the setting is 10, the last 9 readings are averaged
with the current reading.
7.9 LCD Backlight Brightness
The LCD backlight brightness may need to be adjusted. This is of
particular interest if multiple instruments are located in the same area and it
is desired for the entire group to have the same appearance. Ten levels are
available. The factory brightness is 8.
Change the brightness by pressing the or button. When the desired
brightness has been selected, press the button.

13
7.10 Ultrasonic Cleaning
This allows for a selection menu to turn OFF the ultrasonic cleaning
function if desired. The default mode is On. Make a selection using the
and buttons then press the button.
7.11 RS-485 Parameter - Bits
This is the first of three menus to setup the RS-485 parameters. These
menus will only appear if the RS-485 mode is selected. Selections are 7 or
8 bits. The factory selection is 8 bits. Make a selection using the and 
buttons then press the button.
7.12 RS-485 Parameter – Parity
In the Parity menu selections are no parity (nOnE), odd parity (Odd) or even
parity (E). The default selection is no parity. Make a selection using the 
and buttons then press the button. The factory setting is no parity.
7.13 RS-485 Parameter – Stop Bits
For stop bits the choices are 1 or 2 stop bits. The default selection is 1
stop bit. Make a selection using the and buttons then press the 
button. The factory setting is 1 stop bit.
7.14 Duty Cycle
This determines how often the lamp turns on and updates the reading.
The lamp will operate for 1 second each time to obtain readings. Updates
can be set from 4 seconds to 60 seconds. The factory setting is 6. Keep
in mind that this setting also affects the life of the LED. With updates set
to 4 seconds the LED life is about fours. The factory 6-second update will
extend the LED life to over 5 years. The 60-second setting increases LED
life to about 14 years, but this will delay all updates.
Change the selected update period using the and buttons then
press the button.
7.15 Desiccant Alarm
The AccUView LED is equipped with a humidity detector to monitor
the internal environment. Once the relative humidity reaches 34%, the
instrument will display DESC as a warning that the desiccant pack needs
to be replaced. Note that condensation has the potential to form when the
relative humidity reaches 19%. The default setting is OFF, which means
it will only display DESC on the screen. Turning the setting to ON will
affect the 4-20mA signal based on the set error level as well as display
the DESC warning on the screen. Refer to Setting the Error Level section
earlier in the manual.
7.16 4mA Adjustment
If the 4-20 mA setting is turned ON (7.2 Setting the 4-20 mA Output), the
following two menus will appear. The first menu outputs a constant 4 mA
while allowing for a small amount of adjustment. The adjustment can be
made using the and buttons. This adjustment will allow the operator
to make the AccUView LED agree with a PLC or SCADA system. The
adjustment limits are ± 200 counts or about ± 0.2 mA.
This setting will be slightly different on each instrument as each AccUView
LED will be factory set to 4.00mA. Press the button when adjustments
are complete to save this setting and move on to the 20mA adjustment.

14
7.17 20mA Adjustment
This menu operates similar to the previous menu. This menu outputs a
constant 20 mA while allowing for a small amount of adjustment. The
adjustment can be made using the and buttons. The adjustment
limits are ± 1000 counts or about ± 1 mA.
This setting will be slightly different on each instrument as each AccUView
LED will be factory set to 20.00mA.
7.18 Saving Configuration Settings
If extended settings is set to OFF, pressing the button will save all
settings and the AccUView LED will automatically return to the normal
AUTO mode of the instrument.
If extended settings is set to On, after the last menu of the extended
settings, pressing the button will save all settings and the AccUView
LED will automatically return to the normal AUTO mode of the instrument.
The CONFIG menu may be used at any time to reset or change any of the
parameters. The CONFIG menu may be exited at any point in the menu
by using the MODE/EXIT key. Any features that have been modified will
be saved.
While the operating in CONFIG mode the reading before entering that
mode is held.
8.0 Additional Features and
Options
8.1 Backlit LCD
The backlit LCD allows for easier readability of the LCD display in low light
or no light conditions. The backlight is intended for continuous operation.
The brightness is adjustable from a menu in the CONFIG mode.
8.2 Ultrasonic Cleaning
This option is used to continuously clean the flow through cuvette. It is
not intended to clean cuvettes that are already dirty, or replace manual
cleaning entirely. The system will increase the time between cleanings
dramatically. Please note that the system requires the use of a special
cuvette. This cuvette must be used for the system to operate correctly.
The system works by sending an ultrasonic frequency through spring
connections into a piezo transducer bonded to the bottom of a flow
through cuvette.
The system can detect that an incorrect cuvette is installed, an error
has occurred in the transducer or the transducer is not making contact
with the spring connections. This error is indicated by CLN being
posted to the lower screen. Since this is an error condition, the alarms
will be set and the 4-20 mA will be sent to 2 mA.
If the correct cuvette is installed, and the error is still posted, try rotating
the flow through unit slightly to improve the connection. If this fails to
work, the cuvette may have to be replaced (Catalog #24232S). The
detection for this cuvette only operates in AUTO mode. If the system is
operating correctly AUTO will flash.
After installing a cuvette, there will be a 30 minute period where the
ultrasonic circuit will not operate to allow the Vapor Purge system to
remove all moisture from the ultrasonic transducer.
Even with the above drying system, it is still recommended that
Ultrasonic cuvettes be dried by hand, including the transducer on the
bottom prior to use.
8.3 RS-485 Outputs
The AccUView LED has the capability to operate in one of three
different RS-485 modes. Included is a mode for interfacing into the
HF Online software package (section 8.3.1 below), and a simple
communication mode. A third operating mode is the Modbus
communications. All modes will automatically configure and do not
require any changes or selections.
8.3.1 HF Online (HF catalog # 19783)
The AccUView LED can operate as a small SCADA system with an
optional PC software package, called HF ONLINE. This system allows
for an interface with up to 255 AccUView LED’s for the purpose of data
logging. This system will interface directly with common database and
spreadsheet software.

15
8.3.2 Simple Communication
The AccUView LED can provide basic communications over simple
programs such as the Hilgraeve HyperTerminal that is included with
most Microsoft Windows packages. The user could also use Visual Basic
or other programs. The default communication parameters are 8 bits,
no parity and 1 stop bit. These parameters may be changed in the
extended CONFIG menu.
The master computer will send out:
• Byte #1 the attention character “:” in ASCII or 3A Hex
• Byte #2 the address of the AccUView LED being queried
• Byte #3 and 4 CR LF or 0D 0A in hex
The AccUView LED will respond with:
• The same attention character “:” in ASCII or 3A Hex
• The address of the AccUView LED
• The Reading
• The Unit (% T or ABS )
A sample communication would look like this:
(Master computer requesting a report from address #1) : 1 CRLF
(AccUView LED set to address #1 Response) :001 97.4 %T
8.3.3 Modbus Communication
Modbus communications is fully operational if the RS-485 option
(Catalog #19851A) is installed. The Modbus protocol communication
information is covered in a separate manual, Catalog #24570 and is
available as a free download from our website at www.hfscientific.com.
8.4 AccUView LED with Flow Alarm (Model 28042)
This model of the AccUView
LED has flow switch installed.
There is an additional menu in the
configuration which gives you the
selection of ON or OFF.
A “Low Flow” occurs under 1
Liter/minute and if the flow alarm
is enabled will cause a screen
indication. The flow alarm can
act on both the relays and the
4-20mA. Either relay, if set to Error
will change to an alarm state and
the 4-20 mA signal will change o
0, 2 or 4 mA (selected by ERLV)
unless it is set to OFF. A modbus
register is also set. This alarm
takes 2½ minutes of low flow to
actuate or restore. Please note
that the flow alarm is not sold as
an option and cannot be added.
9.0 Routine Maintenance
9.1 Cleaning the Flow Through Cuvette
Measurement cuvettes used for the flow through should be clean and free
of marks or scratches. Cleaning is accomplished by cleaning the interior and
exterior with a detergent solution and then rinsing several times with distilled
or de-ionized water. The cuvette can be replaced by first shutting off the flow
using the provided shutoff clamp; unscrewing the old cuvette and replacing
with a fresh clean one. Recalibration will be required for accurate operation.
9.2 Replacing or Installing the Desiccant
Pouch
The AccUView LED continuously checks the condition of the desiccant.
When the desiccant gets in such a condition that it may cause
problems, the instrument will display DESC on the lower portion of the
display to indicate the presence of humidity.
Proper use of the supplied desiccant is essential in maintaining
the performance of the instrument. The desiccant has been
designed to have a long life; however, replacement of the
desiccant pouch will be required from time to time.
It is essential that the enclosure seal on the instrument base be
maintained to ensure adequate desiccant life. Inspect the seal each
time the desiccant pouch is replaced. Replace or reseat the seal if it is
found to be defective.
The desiccant should be replaced when the instrument displays DESC.
A new sealed desiccant pouch and indicator card are available from HF
scientific part #21555R.To initially install or remove the old desiccant, simply
unscrew the four corner thumbscrews and remove the electronics half of the
instrument. Open the bag protecting the new desiccant pouch and replace
(or install) immediately. To speed up the recognition, by the instrument, of the
new desiccant it will be necessary to reset the instrument by disconnecting
the sensor interconnect cable for 2 seconds and then reconnecting it.
Ensure this cuvette is tightened to the flow through before each
operation. After a cuvette it is recommend that the water be run with
the flow through not installed to allow for inspection of the seal.
NOTICE
Humidity Indicator
(Humonitor Card)
Replaceable
Desiccant Pouch
(Part 21555R)
Drain Seal
Center of drain
opening in
older models
Once the bag is opened, install the desiccant pouch immediately
to prevent premature degradation of the desiccant.
NOTICE
9.3 Replacing the Source LED
The UV source lamp in the AccUView LED has a very long life, but is
dependent on the setting of the Duty Cycle and operating conditions.
See section 7.14 for more information on the LED life
When the UV source LED requires replacement it can easily performed
but it does require opening the enclosure. Contact the factory before
servicing. Alternately another service module can be purchased. Call
the HF Customer Service Department for assistance.

16
10.0 Troubleshooting
10.1 AccUView LED Fault Detection
The AccUView LED performs continuous diagnostic monitoring. In the
AccUView LED there are three levels of fault detection; warnings, errors
and failures. Any faults are displayed in a queue form in the bottom row
of the LCD.
A warning is simply a screen indication of a problem. No alarms
are activated. If the desiccant alarm is turned off and the desiccant
becomes saturated, a screen warning of DESC will appear. At
power-up for 30 minutes and at operating temperatures outside of our
specifications, the %T or ABS reading may flash. When this happens
the reading may be outside of the stated tolerance.
An error indicates a fault or a problem that usually can be corrected
by the operator. These errors consist of lamp low output (LAMP), 4-20
mA loop open (MA), bad 100% T or 0 ABS calibration (CAL Err),
bad temperature compensation calibration (TECO), if desiccant alarm
activated and replacement required (DESC), if enabled no flow (FLOW)
(if equipped with the optional flow switch). An additional message will
indicate that the ultrasonic transducer is not making contact or the flow
through has been removed (CLN). If any of these conditions occurs,
both alarm relays will be activated and the 4-20 mA output will be held
at 2 mA. If any of these errors occur the instrument will still display
readings, however the accuracy is not known and the instruments
readings should not be trusted.
A failure is a system fault. This is NOT a problem that the operator can
correct, and the unit must be returned to the factory for service. These
failures consist of failures in the CPU, A/D, EEPROM or other devices
internal to the instrument (FAIL). If a failure occurs, the instrument will
not function properly and will display the word FAIL on the lower row,
both alarm relays will be activated and the 4-20 mA output will be held
at 2 mA (if 4-20 mA is selected).
If any fault conditions occur, the message indicating the fault will be
shown on the lower row of the display.
10.2 System FAIL Message
Normally, this condition indicates that the instrument will require servicing.
Contact either the HF scientific, Technical Service Department or the
HF scientific, Customer Service Department.
HF scientific
16260 Airport Park Drive, Suite 140
Fort Myers, Florida 33913
Phone: [phone]
Fax: [phone]
Email: [e-mail]
www.hfscientific.com
10.3 Diagnostic Chart
Symptom Cause Cure
Lower display shows MA 4-20 mA loop open Check wiring. See sections 3.3.4
and 7.2
Lower display shows DESC Desiccant pouch bad Change desiccant pouch. See
section 9.2
Lower display shows LAMP LED failed Replace lamp. Refer to section 9.3
Lower display shows FLOW
(if flow option installed)
Sample flow has
stopped
Restore flow.
Lower display shows CLN Ultrasonic cleaning
failure
Refer to section 8.2
Lower display shows CAL
Err after a calibration.
100% T Calibration
failure
Refer to section 5.2
Lower display shows TECO Temperature
Compensation
Calibration failed
Contact HF scientific service dept.
for more information.
Lower display shows FAIL Major system fault Refer to section 10.1 and 10.2
Readings are lower than
expected
(1) Bubbles in solution
(2) Condensate or
leaky cuvette
(3) Flow through
cuvette dirty
Instrument out of
calibration
(1) Ensure that the drain vent is
open and is not obstructed. See
section 3.2.2.
(2) Apply backpressure. See section
3.2 and figure 4
(3) For sever cases of bubbles a
stilling chamber is available. Call
HF scientific.
Part# 20106
Check flow through cuvette for
condensate or leaks.
Clean cuvette. See section 9.1
Recalibrate. Refer to section 5
Readings are erratic (1) Bubbles in solution
(2) Debris in flow
through
(1) See above
(2) Clean debris from cuvette
Readings are lower than
expected
Instrument out of
calibration
Recalibrate. Refer to section 5
10.4 Technical and Customer Assistance
If for any reason assistance is needed regarding this instrument please
do not hesitate to contact either the HF scientific Technical Service
Department or the HF scientific Customer Service Department. Contact
information is shown on section 10.2.

17
11.0 Accessories and Replacement
Parts List
The items shown below are recommended accessories and
replacement parts.
Accessory Catalog Number
Replacement Desiccant Pouch 21555R
100 % T Calibration Solution - 500 ml 19323
Replacement Electronics Service Module Contact Factory
Replacement Quartz Cuvette with Ultrasonic Transducer 24232S
Operating Manual, AccUView LED 29173
Optional Flow Regulator, 1000ml/min. 19778
Replacement Pressure Regulator 24306S
Replacement UV LED Assembly 28474
AccUView LED Version with Flow Alarm Factory Installed
(Provides an alarm if sample flow is interrupted)
28042
Tubing Kit Containing:
1-shutoff clamp, 1-backpressure valve, 2-connecting
tubings with fittings for flow through assembly, drain vent.
21062
To order any accessory or replacement part, please contact the HF
scientific Customer Service Department. If for any reason technical
assistance is needed regarding this instrument please do not hesitate
to contact the HF scientific Technical Services Department.
HF scientific
16260 Airport Park Drive, Suite 140
Fort Myers, Florida 33913
Phone: [phone]
Fax: [phone]
Email: [e-mail]
www.hfscientific.com

18
Mounting Template
All dimensions are in millimeters (inches)
50.80
(2.000)
90.17
(3.500)
87.33
(3.438)
30.17
(1.188)
147.66
(5.813)
Note:
1) See the mounting instructions in the manual for mounting hardware sizes.
2) Provide at least 200mm (8 inches) of free space above the sensor for easy
removal of the flow head and insertion of the calibration standards.
Rev 16-Mar-07

19
Notes
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________________________________________________________________________________________________

IS-HF-AccUViewLED 2239 © 2022 HF scientific
USA: T: [phone] • Toll-Free [phone] • F: [phone] • HFscientific.com
Latin America: T: (52) 55-4122-0138 • HFscientific.com
12.0 Warranty
Watts Regulator Co. (the “Company”) warrants each municipal market instrument product to be free from defects in material and workmanship
under normal usage for a period of one (1) year from first use or two (2) years from date of the Company’s invoice from the original sale of the
product, whichever occurs first. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition
the product without charge. Parts which by their nature are normally required to be replaced periodically, consistent with normal maintenance,
specifically reagents, desiccant, sensors, electrodes and fuses, are excluded. Also excluded are accessories and supply-type items.
Proof of purchase from the Company (Company invoice or paid order confirmation) and/or first use (commissioning) must be provided when making
a product warranty claim.
THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH
RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES, EXPRESSED OR IMPLIED. THE COMPANY HEREBY
SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company
shall not be responsible for any incidental, special or consequential damages, including without limitation, lost profits or the cost of repairing or
replacing other property which is damaged if this product does not work properly, other costs resulting from labor charges, delays, vandalism,
negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the
Company has no control. In addition, the Company shall not be responsible for any costs incidental to the Company’s warranty response efforts,
including, without limitation, costs associated with the removal and replacement of systems, structures or other parts of facilities, de-installation,
decontamination and re-installation of products, or transportation of products to and from the Company. This warranty shall be invalidated by
any abuse, misuse, misapplication, improper installation or improper maintenance of the product, alteration of the product or use of any parts or
accessories (including but not limited to reagents) not provided by the Company.
Some states do not allow limitations on how long an implied warranty lasts, and some states do not allow the exclusion or limitation of incidental or
consequential damages. Therefore the above limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may
have other rights that vary from State to State. You should consult applicable state laws to determine your rights. SO FAR AS IS CONSISTENT
WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR
FROM THE DATE OF ORIGINAL SHIPMENT.