ATI Technologies Q46UV User manual

O & M Manual
Model Q46UV
UV-254/Turbidity Monitor
Home Office European Office
Analytical Technology, Inc. ATI (UK) Limited
6 Iron Bridge Drive Unit 1 & 2 Gatehead Business Park
Collegeville, PA 19426 Delph New Road, Delph
Phone: [phone] Saddleworth OL3 5DE
610-917-0991 Phone: [phone]
Fax: [phone] Fax: + 44 (0)1457-874-468
Email: [email protected] Email: [email protected]

Table of Contents
PART 1 - INTRODUCTION................................4
1.1 General................................................4
1.2 Standard System.................................4
1.3 Features...............................................5
1.4 Q46UV System Specifications.............6
1.5 Q46UV Performance Specifications....7
PART 2 –ANALYZER MOUNTING..................8
2.1 General................................................8
2.2 Wall or Pipe Mount ..............................9
2.3 Panel Mount, AC Powered Monitor ...11
PART 3 –SENSOR INSTALLATION..............12
3.1 General..............................................12
3.2 Flowcell Mounting..............................13
3.3 Calibration Tubing System ................15
3.4 Submersible Installation ....................16
PART 4 –ELECTRICAL INSTALLATION......17
4.1 General..............................................17
4.2 Electrical Connections.......................17
4.3 Relay Connection ..............................20
4.4 Optional Output/Relay Connection....21
4.5 Direct Sensor Wiring..........................22
4.6 Remote Sensor Wiring.......................23
PART 5 –CONFIGURATION..........................24
5.1 User Interface ....................................24
5.11 Keys...............................................25
5.12 Display ...........................................25
5.2 Software.............................................26
5.21 Software Navigation.......................27
5.22 Measure Menu [MEASURE] ..........29
5.23 Calibration Menu [CAL]....................30
5.24 Configuration Menu [CONFIG]......30
5.25 Control Menu [CONTROL]............32
35
5.26 Diagnostics Menu [DIAG] ...............36
5.27 Hidden Menu...................................39
PART 6 –CALIBRATION ...............................40
6.1 UVA/Turbidity Calibration..................40
6.11 Cal UVA Zero.................................40
6.12 Cal UVA Span ...................................41
6.13 Cal Turbidity Zero..........................42
6.14 Cal Turbidity Span.............................42
6.3 Temperature Calibration....................43
PART 7 –PID CONTROLLER DETAILS........45
7.1 PID Description .................................45
7.2 PID Algorithm ....................................45
7.3 Classical PID Tuning.........................47
7.4 Manual PID Override Control............47
7.5 Common PID Pitfalls .........................47
PART 8 –SYSTEM MAINTENANCE..............49
8.1 General..............................................49
8.2 Analyzer Maintenance.......................49
8.3 Sensor Maintenance .........................49
PART 9 –TROUBLESHOOTING ...................50
9.1 General..............................................50
9.2 External Sources of Problems...........50
9.3 Analyzer Tests...................................51
9.31 Display Messages .............................52
SPARE PARTS ...............................................53

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Table of Figures
FIGURE 1–Q46 ENCLOSURE DIMENSIONS ................................................................................... 8
FIGURE 2-WALL OR PIPE MOUNT BRACKET .................................................................................. 9
FIGURE 3-WALL MOUNTING DIAGRAM ........................................................................................10
FIGURE 4-PIPE MOUNTING DIAGRAM..........................................................................................10
FIGURE 5-PANEL MOUNT DIAGRAM............................................................................................11
FIGURE 6-SENSOR DIMENSIONS ................................................................................................12
FIGURE 7-FLOWCELL DIMENSIONS .............................................................................................13
FIGURE 8-SENSOR INSERTION/ALIGNMENT.................................................................................14
FIGURE 9–CALIBRATION TAP DIAGRAM.......................................................................................15
FIGURE 10 -SUBMERSION MOUNTING ASSEMBLY.........................................................................16
FIGURE 11 -AC POWER CONNECTIONS.......................................................................................19
FIGURE 12 -RELAY CONTACTS....................................................................................................20
FIGURE 13 -OPTIONAL LOW POWER RELAY WIRING.....................................................................21
FIGURE 14 -OPTIONAL 3RD ANALOG OUTPUT WIRING..................................................................21
FIGURE 15 -SENSOR CONNECTION .............................................................................................22
FIGURE 16 -REMOTE SENSOR WIRING ........................................................................................23
FIGURE 17 -USER INTERFACE.....................................................................................................24
FIGURE 18 -SOFTWARE MAP ......................................................................................................28
FIGURE 19 -CONTROL RELAY EXAMPLE,HYSTERESIS &PHASE OPTIONS......................................34
FIGURE 20 -ALARM RELAY EXAMPLE...........................................................................................35
FIGURE 21 -ISA PID EQUATION..................................................................................................45
FIGURE 22 -DISPLAY MESSAGES ................................................................................................52

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Part 1 - Introduction
1.1 General
The Model Q46UV is an on-line monitoring system designed for the continuous measurement
UVA (Absorbance) or UVT (Transmittance) in water or wastewater systems. In addition, the
monitor also measures turbidity, providing simultaneous measurement of two important water
quality indicators.
The full scale operating range for UVA measurement is 0-1.3 ABS and for UVT is 0-100% T. The
overall range of the turbidity measurement is 0.2-1000 NTU. Analog outputs for both UV and
turbidity may be scaled for much lower overall ranges depending on application requirements.
Q46UV Monitors are available in two electronic versions, an AC powered monitor with integral
alarm relays and dual 4-20 mA output capability, and a 12-24 VDC unit with dual output and
relays. Options are available to add either a third 4-20 mA output or 3 additional low power SPST
relays. Low power relays are required for installations using ATI’s automatic chemical cleaning
system. In addition, a digital output option for Profibus, Modbus, or Ethernet is available.
Monitors may also display DOC (Dissolved Organic Carbon) instead of UVA or UVT. A table is
provided in the monitor that converts the UV absorption measurement into equivalent DOC. The
table is based on mixed DOC standards using potassium acid phthalate, which is a common
standard for UVA measurement. Note that this table may be modified by the user for applications
where the UV absorption of the organic carbon may be quite different than the standard.
1.2 Standard System
The standard model Q46UV system includes two components, the Q46 analyzer and an optical
sensor with 30 ft. cable. While the sensor may be submerged in tanks or channels, a flowcell is
available for applications requiring higher sensitivity measurements. The flow chamber
eliminates the possibility of interference from external light.
For connection of the sensor to the electronics, a 30' cable is supplied. Up to an additional 100
feet of interconnect cable may be added using #07-0100 junction box.

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1.3 Features
Standard Q46 electronic transmitters are designed to be a fully isolated instruments for operation
from either 90-260 VAC or 12-24 VDC power supplies.
Two 4-20 mA analog outputs are standard, and a third analog output is available as an option.
One output may be configured for PID control, while other output is programmable to track either
Turbidity, UVA, Temperature, or DOC.
Digital communication option for Profibus-DP, Modbus-RTU, Modbus TCP/IP, or Ethernet-IP.
Output Hold, Output Simulate, Output Alarm, and Output Delay Functions. All forced changes in
output condition include bumpless transfer to provide gradual return to on-line signal levels and to
avoid system control shocks on both analog outputs.
Units provide provides three SPDT relay outputs and two isolated analog outputs. Software
settings for relay control include setpoint, deadband, phase, delay, and failsafe.
Selectable Output Fail Alarm feature on Relay C allows system diagnostic failures to be sent to
external monitoring systems.
Large, high contrast, custom LCD display with LED back light provides excellent readability in any
light conditions. The secondary line of display utilizes 5x7 dot matrix characters for clear
message display two of four measured parameters may be on the display simultaneously.
Diagnostic messages provide a clear description of any problem with no confusing error codes to
look up. Messages are also included for diagnosing calibration problems.
Security lock feature to prevent unauthorized tampering with transmitter settings. All settings can
be viewed while locked, but they cannot be changed.
Equipment bearing this marking may not be discarded by traditional methods in the
European community after August 12 2005 per EU Directive 2002/96/EC. End
users must return old equipment to the manufacturer for proper disposal.

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1.4 Q46UV System Specifications
Displayed Parameters UVA, 0-1.300 ABS, or UVT, 0-100% T
Turbidity, 0.2-1000 NTU
Sensor temperature, -10.0 to 50.0°C (23 to 122ºF)
Loop current, 4.00 to 20.00 mA
Sensor slope/offset
Model number and software version
PID Controller Status
Main Parameter Ranges UV Absorption, 0-1.300 A
Turbidity: 0-40.00, 0-400.0, 0-4000 NTU
Power 90 - 260 VAC, 50/60 Hz., 10 VA Maximum
or 12-24 VDC, 500 mA max.
Display 0.75” (19.1 mm) high 4-digit main display with sign
12-digit secondary display, 0.3" (7.6 mm) 5x7 dot matrix.
Integral LED back-light for visibility in the dark.
Enclosure NEMA 4X, polycarbonate, stainless steel hardware,
Mounting Options Wall, pipe, or panel mount standard. Wall bracket suitable for
either 1.5” or 2” I.D. U-Bolts for pipe mounting.
Conduit Openings Five ½” NPT openings, Adapter can be removed to provide a 1”
NPT opening in the bottom of the enclosure. Gland seals
provided but not installed.
Relays, Electromechanical: Three SPDT, 6 amp @ 250 VAC, 5 amp @ 24 VDC contacts.
Software selection for setpoint, phase, delay, deadband, hi-lo
alarm, and failsafe. A-B indicators on main LCD, and C indicator
on lower display.
Analog Outputs Two 4-20 mA outputs. Output one programmable for UVA or
PID. Output 2 programmable for UVA, DOC, NTU or
Temperature. Max load 450 Ohms for output 1 and 1000 ohms
for output 2. Outputs ground isolated and isolated from each
other. An additional 3rd analog option is available.
Output Isolation 600 V galvanic isolation
Optional Relays: Three SPST, 1 amp @ 24 VDC. Software selection for setpoint,
phase, delay, deadband, hi-lo alarm, and failsafe.
Sensor Cleaner Optional automatic chemical cleaning system available for
applications where iron and manganese fouling is common.
Ambient Temperature Analyzer Service, -20 to 60 °C (-4 to 140 ºF)
Sensor Service, 0 to 55°C (23 to 131 °F)
Storage, -30 to 70 °C (-22 to 158 ºF)

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Ambient Humidity 0 to 95%, indoor/outdoor use, non-condensing to rated ambient
temperature range
Altitude Up to 2000 m (6562 ft)
Electrical Certification Ordinary Location, cCSAus (Certified to both CSA and UL
standards), pollution degree 2, installation category 2
EMI/RFI Influence Designed to EN 61326-1
Weight 2.4 lb. (1.1 Kg.)
UV Sensor 20 mm UV absorption path, 254 nm wavelength
Turbidity Sensor 90° Scatter, 860 nm IR source
Sensor Materials Anodized aluminum with sapphire optics
Sensor Cable Submersible: 30 ft. (10 m)
Max. Sensor Cable Length: 100 feet (30 m), with junction box
1.5 Q46UV Performance Specifications
Accuracy 1% UV Transmittance
Repeatability 0.5% UV Transmittance
Sensitivity 0.1% UV Transmittance
Warm-up Time 30 seconds to rated performance (electronics only)
Supply Voltage Effects ± 0.1% span
Instrument Response Time 120 seconds to 90% of step input at lowest damping

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Part 2 – Analyzer Mounting
2.1 General
All Q46 Series instruments offer maximum mounting flexibility. A bracket is included with each
unit that allows mounting to walls or pipes. Choose a location that is readily accessible for
calibrations and keep in mind that it will be necessary to use solutions during the calibration
process. To take full advantage of the high contrast display, mount the instrument in a location
where the display can be viewed from various angles and long distances.
Locate the instrument in close proximity to the point of sensor installation - this will allow easy
access during calibration. The sensor-to-instrument distance should not exceed 100 feet (30 m).
To maximize signal-to-noise ratio however, work with the shortest sensor cable possible. The
standard cable length of the turbidity sensor is 30 feet.
Figure 1 –Q46 Enclosure Dimensions

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2.2 Wall or Pipe Mount
A PVC mounting bracket with attachment screws is supplied with each transmitter (see Figure 2
for dimensions). The multi-purpose bracket is attached to the rear of the enclosure using the four
flat head screws. The instrument is then attached to the wall using the four outer mounting holes
in the bracket. These holes are slotted to accommodate two sizes of u-bolt that may be used to
pipe mount the unit. Slots will accommodate u-bolts designed for 1½ “or 2” pipe. The actual
center to center dimensions for the u-bolts are shown in the drawing. Note that these slots are for
u-bolts with ¼-20 threads. The 1½” pipe u-bolt (2” I.D. clearance) is available from ATI in type
304 stainless steel under part number 47-0005
Figure 2 - Wall or Pipe mount bracket

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Figure 3 - Wall Mounting Diagram
Figure 4 - Pipe Mounting Diagram
ENTER
MENU
ESC

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2.3 Panel Mount, AC Powered Monitor
Panel mounting of an AC powered monitor uses the panel mounting flange molded into the rear
section of the enclosure.
Figure 5 - Panel Mount Diagram
Figure 5 provides dimensions for the panel cutout required for mounting. The panel mounting
bracket kit must be ordered separately (part number 05-0068). This kit contains a metal retainer
bracket that attaches to the rear of the enclosure, 4 screws for attachment of this bracket, and a
sealing gasket to insure that the monitor flange provides a water tight seal when mounted to a
panel.
The sealing gasket must first be attached to the enclosure. The gasket contains an adhesive on
one side so that it remains in place. Remove the protective paper from the adhesive side of the
gasket and slide the gasket over the back of the enclosure so that the adhesive side lines up with
the back of the enclosure flange. Once in place, you can proceed to mount the monitor in the
panel.

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Part 3 – Sensor Installation
3.1 General
The UV/Turbidity sensor may be used either in a flowcell or submerged in a tank or channel. The
flowcell used with the system is designed to eliminate ambient light effects and to allow sample
pressure to be maintained through the flowcell minimizing air bubble formation that can cause
measurement errors. A bracket is supplied for mounting the flowcell to any flat surface. The
flowcell should be used for all finished water applications and is best for raw water use as well.
NOTE: UV sensor flowcells are shipped with two sets of fittings for sample connection. The
factory installed fittings are intended for clean water applications (NTU less than 10)
and accept 0.25” O.D. tubing. The outlet fitting contains a fixed-flow regulator that will
maintain sample flow at 4 GPH (0.25 LPM). Sample inlet pressure should be in the
range of 1-50 PSIG. A second set of fittings are supplied for raw water applications
where high turbidity might be expected periodically. These fittings accept 3/8” O.D.
tubing and there is no flow regulator in the outlet. These fittings should be used when
needed and flow regulation should be installed on the outlet tubing. A ball valve is
best for this as it is easy to clean by opening completely.
Dimensions of the UV-254/Turbidity sensor are shown below.
UV254 SENSOR
(63-0120)
25 FT. STD LENGTH
8.090"
[ 205.5mm ]
1.535"
[ 39mm ]
1.693"
[ 43mm ]
5.220"
[ 132.6mm ]
5.732"
[ 145.6mm ]
6.677"
[ 169.6mm ]
MATL: ANODIZED ALUMINUM
Figure 6 - Sensor Dimensions

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3.2 Flowcell Mounting
Figure 7 provides flowcell dimensions. Note that the flowcell should always be mounted
horizontally with the inlet on the bottom and outlet on the top.
Select a flowcell location with sufficient clearance below to allow installation of the inlet calibration
valve to facilitate adjustment of the system after installation. See Figure 9 for the suggested
tubing arrangement when using the calibration valve system supplied with the unit.
RT < FITTING w/
FLOW RESTRICTOR
1/4" INLET FITTING
8.154
5.456
2.656 4.030
6.000
Figure 7 - Flowcell Dimensions
Figure 8 below provides a detail of how the UV sensor is installed in the flowcell assembly.
During installation of the sensor, be sure that the O-ring is seated properly in the groove at the
end of the flowcell assembly. Proper seating of that O-ring is critical to avoiding water leakage.
Note that the sensor has an orange marking label on the back. The white lines on the label
should be aligned with the inlet and outlet fittings so that the sensor sits in the proper position
inside the flowcell.

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UV254 PROBE
(63-0120)
ALIGN OPENING ON PROBE
WITH SAMPLE FITTINGS
FLOWCELL ASSEMBLY
ALIGNMENT LABEL
INDICATING REQUIRED
FLOWPATH OF SENSOR
END OF PROBE
SHOWN
Figure 8 - Sensor Insertion/Alignment

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3.3 Calibration Tubing System
Supplied with the UV254/Turbidity system is a 3-way valve, some tubing, and a syringe that
facilitates zeroing and calibration of the measurements. Shown below is a diagram of how the
tubing and valve should be installed. This arrangement will allow introduction of zero and span
solutions using the 60 ml. syringe without disturbing the sample piping.
Figure 9 –Calibration Tap Diagram

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3.4 Submersible Installation
The standard UV sensor may also be used for submersion installations. Note that the turbidity
measurement may be affected by bright ambient light conditions. Submerged sensors
MUST be located in dark areas. Figure 10 below shows a typical submersion mounting using
ATI’s 00-1690 submersion mounting kit. This complete kit adapts to typical handrails. The pipe
adapter only is part no. 00-1689 and is available separately when the handrail mounting kit is not
required.
Figure 10 - Submersion Mounting Assembly

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Part 4 – Electrical Installation
4.1 General
The Q46 is powered in one of two ways, depending on the version purchased. The 12-24 VDC
powered analyzer requires a customer supplied DC power supply. The 90-260 VAC version
requires line power. Please verify the type of unit before connecting any power.
WARNING: Do not connect AC line power to the DC version. Severe damage will result.
Important Notes:
1. Use wiring practices that conform to national, state and local electrical codes. For proper
safety as well as stable measuring performance, it is important that the earth ground
connection be made to a solid ground point on TB7. The AC power supply in the
transmitter contains a single 630mA slo-blo fuse (Wickmann/Littlefuse #372-0630). The
fuse F1 is located adjacent to TB7 and is easily replaceable.
2. Do NOT run sensor cables or instrument 4-20 mA output wiring in the same conduit that
contains AC power wiring. AC power wiring should be run in a dedicated conduit to prevent
electrical noise from coupling with the instrumentation signals.
3. This analyzer must be installed by specifically trained personnel in accordance with
relevant local codes and instructions contained in this operating manual. Observe the
analyzer's technical specifications and input ratings. Proper electrical disconnection means
must be provided prior to the electrical power connected to this instrument, such as a circuit
breaker - rated 250 VAC, 2 A minimum. If one line of the line power mains is not neutral,
use a double-pole mains switch to disconnect the analyzer.
4. Repeated problems with lightning strikes damaging sensitive instrumentation are often
attributed to poorly bonded earth grounds in the instrument power source. The protection
schemes incorporated into this analyzer cannot operate to maximum efficiency unless the
ground connection is at its’ absolute lowest impedance.
There is no standard ground resistance universally recognized. Many agencies recommend a
ground resistance value of 5 ohms or less. The NEC recommends an impedance to ground of
less than 25 ohms, and less than 5 ohms where sensitive equipment is installed. Power sources
feeding sensitive instruments like the Q46H/79PR should have the lowest possible impedance to
ground.
4.2 Electrical Connections
Verify the power supply requirement before installing. Also verify that power is fully disconnected
before attempting to wire.
Q46 systems are supplied with 5 cable gland fittings for sealing cable entries.
Connect appropriate power to the matching designations on terminal strip TB7.

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The analog outputs from the system are present at terminals TB1 and TB2. The loop-load
limitation in this configuration is 450 Ohms maximum for output 1 and 1000 ohms maximum for
output 2. Also note that these two outputs are completely isolated from each other to insure that
ground loops do not result from the connection of both outputs to the same device such as a PLC
or DCS.
A ribbon cable connects the power supply assembly with the microprocessor assembly located in
the front section of the enclosure. This cable may be unplugged from the front section of the
monitor if service is needed, but should normally be left in place during installation.
The power strip, TB7, allows up to 12 AWG wire. A wire gauge of 16 AWG is recommended to
allow for an easy pass-through into the ½” NPT ports when wiring.
AC or DC power should be brought into the enclosures through the bottom gland seal on the right
side of the enclosure. This entry is directly above the power terminal blocks. Terminal blocks are
pluggable, and can be removed for easy wire connection. See Figure 13 for TB7 Terminal
Locations.
WARNING
Disconnect line power voltage BEFORE connecting line power wires
to Terminal TB7 of the power supply. The power supply accepts only
standard three-wire single phase power. The power supply is
configured for 115 VAC or 230 VAC operation at the factory at time of
order, and the power supply is labeled as such. Do NOT connect
voltages other than the labeled requirement to the input.

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Figure 11 - AC Power Connections

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4.3 Relay Connection
Three SPDT relays are provided on the power supply board. None of the relay contacts are
powered. The user must supply the proper power to the contacts. For applications that require
the same switched operating voltage as the Q46 (115 or 230 V), power may be jumped from the
power input terminals at TB7. Relay wiring is connected at TB4, TB5, and TB6 as shown below.
Note that the relay contact markings are shown in the NORMAL mode. Programming a relay for
“Failsafe” operation reverses the NO and NC positions in this diagram (Figure 12 - Relay
Contacts).
Figure 12 - Relay Contacts