ATI Technologies Q46/88 User manual

O & M Manual
Model Q46/88
Suspended Solids 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...............................................6
1.4 Q46/88 System Specifications.............7
1.5 Q46/88 Performance Specifications....8
PART 2 –ANALYZER MOUNTING..................9
2.1 General................................................9
2.2 Wall or Pipe Mount ............................10
2.3 Panel Mount, AC Powered Monitor ...12
PART 3 –SENSOR INSTALLATION..............13
3.1 General..............................................13
3.2 Submersible Installation ....................13
3.3 In-Line Installation..............................15
3.4 Flowcell Mounting..............................17
PART 4 –ELECTRICAL INSTALLATION......19
4.1 General..............................................19
4.2 AC Wiring...........................................19
4.3 Relay Connection ..............................21
4.4 Optional Output/Relay Connection....22
4.5 Direct Sensor Wiring..........................23
4.6 Remote Sensor Wiring.......................24
PART 5 –CONFIGURATION..........................25
5.1 User Interface ....................................25
5.11 Keys ...............................................26
5.12 Display ...........................................26
5.2 Software.............................................27
5.21 Software Navigation......................28
5.22 Measure Menu [MEASURE]..........30
5.23 Calibration Menu [CAL]....................31
5.24 Configuration Menu [CONFIG]......31
5.25 Control Menu [CONTROL]............33
5.26 Diagnostics Menu [DIAG] ...............37
PART 6 –CALIBRATION ...............................41
6.1 Suspended Solids Calibration...........41
6.11 Cal Zero.........................................41
6.12 Cal Span........................................41
6.2 Temperature Calibration....................42
6.3 Check Signal Function ......................43
6.31 Calibrate Check Signal..................43
6.4 External Light Function......................44
PART 7 –SYSTEM MAINTENANCE..............45
7.1 General..............................................45
7.2 Analyzer Maintenance.......................45
7.3 Sensor Maintenance .........................45
PART 8 –TROUBLESHOOTING ...................46
8.1 General..............................................46
8.2 External Sources of Problems...........46
8.3 Analyzer Tests...................................47
8.31 Display Messages .............................48
PART 9 –PID CONTROLLER DETAILS........50
9.1 PID Description .................................50
9.2 PID Algorithm ....................................50
9.3 Classical PID Tuning.........................52
9.4 Manual PID Override Control............52
9.5 Common PID Pitfalls .........................52
SPARE PARTS ...............................................54

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Table of Figures
FIGURE 1-SYSTEM OPTIONS...........................................................................................................................5
FIGURE 2–Q46 ENCLOSURE DIMENSIONS.......................................................................................................9
FIGURE 3-WALL OR PIPE MOUNT BRACKET....................................................................................................10
FIGURE 4-WALL MOUNTING DIAGRAM...........................................................................................................11
FIGURE 5-PIPE MOUNTING DIAGRAM ............................................................................................................11
FIGURE 6-PANEL MOUNT INSTALLATION........................................................................................................12
FIGURE 7-SUBMERSION MOUNTING ASSEMBLY .............................................................................................13
FIGURE 8-SUBMERSIBLE SENSOR ASSEMBLY................................................................................................14
FIGURE 9-11/2" IN-LINE INSTALLATION.........................................................................................................15
FIGURE 10 -FLOW TEE EXPLODED VIEW........................................................................................................16
FIGURE 11 -FLOWCELL DIMENSIONS..............................................................................................................17
FIGURE 12 -SENSOR/FLOWCELL EXPLODED VIEW..........................................................................................18
FIGURE 13 -AC POWER CONNECTIONS .........................................................................................................20
FIGURE 14 -RELAY CONTACTS......................................................................................................................21
FIGURE 15 -OPTIONAL LOW POWER RELAY WIRING.......................................................................................22
FIGURE 16 -OPTIONAL 3RD ANALOG OUTPUT WIRING ....................................................................................22
FIGURE 17 –SUSPENDED SOLIDS SENSOR CONNECTION................................................................................23
FIGURE 18 -REMOTE SENSOR WIRING...........................................................................................................24
FIGURE 19 -USER INTERFACE .......................................................................................................................25
FIGURE 20 -SOFTWARE MAP.........................................................................................................................29
FIGURE 21 -CONTROL RELAY EXAMPLE,HYSTERESIS &PHASE OPTIONS .......................................................35
FIGURE 22 -ALARM RELAY EXAMPLE.............................................................................................................36
FIGURE 23 -DISPLAY MESSAGES...................................................................................................................49
FIGURE 24 -ISA PID EQUATION ....................................................................................................................50

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Part 1 - Introduction
1.1 General
The Model Q46/88 is an on-line monitoring system designed for the continuous measurement of
suspended solids in water. It is intended for continuous monitoring of aeration tank mixed liquor,
clarifier effluent, industrial process water, and other applications containing relatively high levels
of suspended solids.
The system provides measurement over one of 3 selectable operating ranges, 0-100.0 mg/l, 0-
1000 mg/l, or 0-10.00 g/l. The sensing element used for suspended solids measurement is an
optical sensor measuring infrared “backscatter”, a method suitable for high solids levels. For
applications where sensor fouling is frequent, and Auto-Clean version of the system is available
that uses ATI’s Q-Blast air cleaner assembly.
Q46/88 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 (required for Auto-Clean systems). In addition, digital output options are available for
Profibus-DP, Modbus RTU or TCP/IP, or Ethernet-IP.
1.2 Standard System
Q46/88 systems include two components, the Q46 analyzer and an optical sensor with 30 ft.
cable. Sensor mounting options include submersion, submersion with Auto-Clean holder, 1 ½”
flow tee, or flowcell. If possible, the flowcell or flow tee should be used if expected suspended
solids levels are always below 10 mg/l.
For connection of the sensor to the electronics, a 30' cable is supplied. Up to an additional 400
feet of interconnect cable may be added using #07-0100 junction box.

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Figure 1 - System Options

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1.3 Features
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. Output #1 may be configured for PID control. Outputs 2 (and 3 if added) are
programmable to track Suspended Solids, Temperature, or sensor signal strength.
Selectable PID controller on main analog output.
Communication options for Profibus-DP, Modbus-RTU or 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.
oThree SPDT relay outputs for on-off control. Software settings for relay control include
setpoint, deadband, phase, delay, and failsafe.
oSelectable 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 Q46/88 System Specifications
Displayed Parameters Main input, 0.1 mg/l to 10.00 g/l
Sensor temperature, -5.0 to 50.0°C (23 to 122ºF)
Loop current, 4.00 to 20.00 mA
Sensor slope/offset
Check Signal Level
% Light Level
Model number and software version
PID Controller Status
Main Parameter Ranges Manual selection of one of the following display ranges,
0-100.0 mg/l, 0-1000 mg/l, or 0-10.00 g/l.
Power 90 - 260 VAC, 50/60 Hz., 10 VA Maximum
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 NTU
Suspended Solids or PID. Output 2 programmable for 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.
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)
Ambient Humidity 0 to 95%, indoor/outdoor use, non-condensing to rated ambient
temperature range

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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.)
Sensor Optical backscatter
Sensor Materials PVC and acrylic
Sensor Cable Submersible: 30 ft. (10 m)
Max. Sensor Cable Length: 400 feet (123 m), with junction box
1.5 Q46/88 Performance Specifications
Accuracy 0.5% of range or 0.5 mg/l
Repeatability 0.3% of range or 0.3 mg/l
Sensitivity 0.1% of selected range
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 Suspended Solids sensor is 15 feet.
Figure 2 –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 3
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 3 - Wall or Pipe mount bracket