Hach Accu4 User manual
DOC023.97.80356
Accu4™ (T53, 8320)
01/2013, Edition 1
User Manual
用户手册
English...................................................................................................................................................................................................3
中文.......................................................................................................................................................................................................29
2
Table of contents
Specifications on page 3 Operation on page 18
General information on page 4 Maintenance on page 23
Installation on page 7 Troubleshooting on page 24
User interface and navigation
on page 17
Replacement parts and accessories
on page 27
Startup on page 18
Specifications
Specifications are subject to change without notice.
Model 8320 turbidity sensor
Specification Details
Operational:
Flow rate 0.19 to 26.5 LPM (0.05 to 7 GPM)
Ambient conditions 0 to 60 °C (32 to 140 °F)
Sample temperature
range
0 to 60 °C (32 to 140 °F)
Pressure range 0–3.4 bar at 20 °C (0–50 psig at 68 °F)
Pressure drop 0.0001 bar at 0.36 LPM (0.0017 psig at 0.1 GPM)
Residence time 3.8 LPM (9.5 seconds at 1 GPM)
Air venting Integral bubble trap for 0.19 to 1.9 LPM (0.05 to
0.5 GPM) flows.
Installation of an external bubble trap and a restrictor
valve on the sensor outlet is recommended for flows
above 1.9 LPM (0.5 GPM) with air in the sample.
Refer to Use an external bubble trap on page 27.
Mechanical:
Light sources Two near-infrared (880 nm wavelength) LEDs
Specification Details
Power requirements 5 V supplied by the controller to the light sources
and detectors
Process connections ½–in. NPT female standard; adaptable to 3/8–in. or
¼–in. NPT, barb or tube fittings
Wetted materials PVC, polycarbonate, polystyrene, PPO, nitrile and
Buna-N
Enclosure Molded fiber-glass-reinforced polyester (flame
retardant) with four brackets for surface mounting
Dimensions (W x D x H) 285 x 172 x 400 mm (11.21 x 6.79 x 15.75 in.)
Net weight 4.5 kg (10 lb) approximately
Certifications 15 year environmental friendly use period
Model T53 controller
Specification Details
Operational:
Display Graphic dot matrix LCD, 128 x 64 pixels with LED
backlighting; 13 mm (½–in.) main character height;
3 mm (1/8–in.) auxiliary information character height;
menu screens contain up to six lines of text
Ambient conditions Operation: –20 to 60 °C (–4 to 140 °F); 0–95% relative
humidity, non-condensing
Storage: –30 to 70 °C (–22 to 158 °F); 0–95% relative
humidity, non-condensing
Pollution degree 2
Installation category II
Protection class I
Altitude 2000 m (6561 ft) maximum
English 3
Specification Details
Sensor-to-controller
distance
9 m (30 ft) maximum1
Power requirements 90–130 VAC (115 VAC nominal) or 180–260 VAC
(230 VAC nominal), 50/60 Hz, 10 VA maximum
Relays Four electromechanical relays; SPDT (Form C)
contacts; 115/230 VAC, 5 A @ 30 VDC resistive
Analog outputs Two isolated 0.00–20.00 mA or 4.00–20.00 mA outputs
each with 0.004 mA (12–bit) resolution; up to 600 ohm
load capacity
Mechanical:
Enclosure NEMA 4X; polycarbonate face panel, epoxy-coated
cast aluminum door and case with four 13-mm (½–in.)
cable entry holes, nylon mounting bracket and stainless
hardware
Mounting Panel, surface or pipe mount
Net weight 2.3 kg (5 lb)
Fuses One type T, 80 mA, 250 V slow-blow fuse for the 230 V
line power circuits, 5 mm x 20 mm; one type T,
100 mA, 250 V slow-blow fuse for the 115 V line power
circuits, 5 mm x 20 mm
Certifications 15 year environmental friendly use period
Accu4 system performance:
Measurement range 0.000–100.0 NTU; auto-ranging and automatic decimal
point shift above 1.000 NTU and 10.00 NTU (same for
other measurement units)
Measurement units NTU, TEF, FNU or FTU
Signal averaging 0 to 60 seconds
System accuracy ±2% of reading, all ranges
Sensitivity 0.001 NTU
Specification Details
Repeatability 0.1% of span or better
Temperature drift Zero and span: 0.01% of span per °C
1Contact the manufacturer if a longer distance is necessary.
General information
In no event will the manufacturer be liable for direct, indirect, special,
incidental or consequential damages resulting from any defect or
omission in this manual. The manufacturer reserves the right to make
changes in this manual and the products it describes at any time, without
notice or obligation. Revised editions are found on the manufacturer’s
website.
Safety information
NOTICE
The manufacturer is not responsible for any damages due to misapplication or
misuse of this product including, without limitation, direct, incidental and
consequential damages, and disclaims such damages to the full extent permitted
under applicable law. The user is solely responsible to identify critical application
risks and install appropriate mechanisms to protect processes during a possible
equipment malfunction.
Please read this entire manual before unpacking, setting up or operating
this equipment. Pay attention to all danger and caution statements.
Failure to do so could result in serious injury to the operator or damage
to the equipment.
Make sure that the protection provided by this equipment is not impaired.
Do not use or install this equipment in any manner other than that
specified in this manual.
Use of hazard information
DANGER
Indicates a potentially or imminently hazardous situation which, if not avoided, will
result in death or serious injury.
4 English
W A R N I N G
Indicates a potentially or imminently hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation that may result in minor or moderate
injury.
NOTICE
Indicates a situation which, if not avoided, may cause damage to the instrument.
Information that requires special emphasis.
Precautionary labels
Read all labels and tags attached to the instrument. Personal injury or
damage to the instrument could occur if not observed. A symbol, if noted
on the instrument, will be included with a danger or caution statement in
the manual.
This is the safety alert symbol. Obey all safety messages that follow
this symbol to avoid potential injury. If on the instrument, refer to the
instruction manual for operation or safety information.
This symbol indicates that a risk of electrical shock and/or
electrocution exists.
This symbol indicates the presence of devices sensitive to Electro-
static Discharge (ESD) and indicates that care must be taken to
prevent damage with the equipment.
Electrical equipment marked with this symbol may not be disposed of
in European public disposal systems after 12 August of 2005. In
conformity with European local and national regulations (EU Directive
2002/96/EC), European electrical equipment users must now return
old or end-of-life equipment to the Producer for disposal at no charge
to the user.
Note: For return for recycling, please contact the equipment producer or supplier
for instructions on how to return end-of-life equipment, producer-supplied
electrical accessories, and all auxiliary items for proper disposal.
This symbol, when noted on the product, identifies the location of a
fuse or current limiting device.
This symbol indicates that the marked item requires a protective earth
connection. If the instrument is not supplied with a ground plug on a
cord, make the protective earth connection to the protective
conductor terminal.
Certification
Canadian Radio Interference-Causing Equipment Regulation,
IECS-003, Class A:
Supporting test records reside with the manufacturer.
This Class A digital apparatus meets all requirements of the Canadian
Interference-Causing Equipment Regulations.
Cet appareil numèrique de classe A répond à toutes les exigences de la
réglementation canadienne sur les équipements provoquant des
interférences.
FCC Part 15, Class "A" Limits
Supporting test records reside with the manufacturer. The device
complies with Part 15 of the FCC Rules. Operation is subject to the
following conditions:
1. The equipment may not cause harmful interference.
2. The equipment must accept any interference received, including
interference that may cause undesired operation.
Changes or modifications to this equipment not expressly approved by
the party responsible for compliance could void the user's authority to
operate the equipment. This equipment has been tested and found to
comply with the limits for a Class A digital device, pursuant to Part 15 of
the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated
in a commercial environment. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference
to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference, in which case the user will be
required to correct the interference at their expense. The following
techniques can be used to reduce interference problems:
English 5
1. Disconnect the equipment from its power source to verify that it is or
is not the source of the interference.
2. If the equipment is connected to the same outlet as the device
experiencing interference, connect the equipment to a different
outlet.
3. Move the equipment away from the device receiving the interference.
4. Reposition the receiving antenna for the device receiving the
interference.
5. Try combinations of the above.
Product overview
DANGER
Chemical or biological hazards. If this instrument is used to monitor a
treatment process and/or chemical feed system for which there are
regulatory limits and monitoring requirements related to public health,
public safety, food or beverage manufacture or processing, it is the
responsibility of the user of this instrument to know and abide by any
applicable regulation and to have sufficient and appropriate
mechanisms in place for compliance with applicable regulations in the
event of malfunction of the instrument.
The Accu4 low-range turbidimeter system includes a Model
8320 turbidity sensor and Model T53 controller. Refer to Figure 1 and
Figure 12 on page 17. The system design meets the International
Standards for Measurement of Turbidity (ISO 7027) for FNU and
USEPA-approved GLI Method 2 for NTU.
This system is used to monitor the turbidity of potable water or filtered
water.
Figure 1 Model 8320 turbidity sensor overview
1 Calibration hose and funnel 6 Detectors (2x)
2 Terminal board 7 Door latch
3 Light sources (2x) 8 Inlet (½–in. NPT female)
4 Flow chamber 9 3-way value, internal
5 Outlet (½–in. NPT female) 10 Sensor cable
Product components
Make sure that all components have been received. Refer to Figure 2
and Figure 3. If any items are missing or damaged, contact the
manufacturer or a sales representative immediately.
6 English
Figure 2 Turbidity sensor components
1 Turbidity sensor 3 Mounting screws (4x)
2 Mounting brackets (4x)
Figure 3 Controller components
1 Controller 6 Flat washers, ¼–in. ID (8x)
2 Sealing gasket for panel mount,
Neoprene
7 Hex nuts, M6 (8x)
3 Mounting foot (2x) for panel mount 8 Pan head screws, M6 x 1.0 x
20 mm (4x)
4 Mounting bracket 9 Pan head screws, M6 x 1.0 x
100 mm for pipe mount (4x)
5 Ground screw, green 10 Pan head screws, M6 x 1.0 x
150 mm for panel mount (4x)
Installation
W A R N I N G
Multiple hazards. Only qualified personnel must conduct the tasks
described in this section of the document.
Installation guidelines
Install the turbidity sensor as near as possible to where the controller is
to be installed. Contact the manufacturer if a distance longer than 9 m
(30 ft) is necessary.
English 7
Make sure that the ambient conditions of the installation location of the
turbidity sensor and controller are within specifications. Refer to
Specifications on page 3.
Install the turbidity sensor indoors or outdoors where there is little or no
ambient vibration. Install the controller in a location that is:
• Clean and dry where there is little or no vibration
• As far as possible away from sources of vibration
• As near as possible to the water source
• Protected from corrosive fluids
Note: If exposed to direct sunlight, the operating temperature of the controller may
increase above the specified limit. Direct sunlight may also decrease the display
visibility. If necessary, use a sun shield (1000G3088-001).
Mechanical installation
Sensor mounting
Install the turbidity sensor on a flat surface. Refer to the illustrated steps
in Figure 4. Mounting hardware is supplied by the user.
Figure 4 Sensor mounting
Controller mounting
Install the controller on a flat surface, panel or pipe (horizontal or
vertical). Refer to the instructions supplied with the controller mounting
hardware.
8 English
Electrical installation
W A R N I N G
Potential electrocution hazard. In order to maintain the NEMA/IP
environmental ratings of the enclosure, use only conduit fittings and
cable glands rated for at least NEMA 4X/IP66 to route cables in to the
instrument.
W A R N I N G
Potential Electrocution Hazard. Always disconnect power to the
instrument when making electrical connections.
• Put all wiring to the sensor and controller in ½-inch, grounded metal
conduit to protect the cable from moisture, electrical noise or
mechanical damage.
If only shielded cables are used, applicable strain reliefs or cable grips
are necessary. Accessory watertight cable grips (3H1091) and
locknuts (3H1230) are available from the manufacturer.
• Make sure that the diameter of the cables used is 4.3–11.4 mm (0.17–
0.45 in.) so that the cable strain reliefs hold the cables securely when
tightened.
• Do not put more than one cable in a cable strain relief.
• Close all unused cable entry holes with applicable plugs to keep out
moisture.
• Close all unused cable strain reliefs with rods or cables to keep out
moisture.
Electrostatic discharge (ESD) considerations
NOTICE
Potential Instrument Damage. Delicate internal electronic components
can be damaged by static electricity, resulting in degraded
performance or eventual failure.
Refer to the steps in this procedure to prevent ESD damage to the
instrument:
• Touch an earth-grounded metal surface such as the chassis of an
instrument, a metal conduit or pipe to discharge static electricity from
the body.
• Avoid excessive movement. Transport static-sensitive components in
anti-static containers or packages.
• Wear a wrist strap connected by a wire to earth ground.
• Work in a static-safe area with anti-static floor pads and work bench
pads.
Wiring overview
Figure 5 shows the wiring connections and fuses for the controller.
English 9
Figure 5 Wiring overview
1 Analog output connections (2x) 5 AC input power connections
2 RS232 connection (not used) 6 Fuses (2x)
3 TTL connection 7 Relay connections (4x)
4 Sensor cable connections 8 Grounding strip
General wiring procedure
W A R N I N G
Potential Electrocution Hazard. Always disconnect power to the
instrument when making electrical connections.
Connect wiring to the controller as shown in the illustrated steps in
Figure 6. When wiring is complete, close the controller cover and tighten
all the cover screws in order to maintain the NEMA/IP environmental
ratings of the enclosure.
10 English
Table of contents
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