Hach Sigma 900 MAX User manual

MAN026.53.90027
Sigma 900 MAX All Weather Refrigerated Sampler
USER MANUAL
August 2008, Edition 1
© Hach Company, 2008. All rights reserved. Printed in the U.S.A. and Germany. kw/kt
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Table of Contents
Section 1 Specifications...........................................................................................................7
Section 2 General information...............................................................................................13
2.1 Safety information.......................................................................................................................13
2.1.1 Use of hazard information..................................................................................................13
2.1.2 Precautionary labels ..........................................................................................................13
2.2 Hazardous locations ...................................................................................................................15
2.2.1 Confined space entry.........................................................................................................15
2.2.2 Definition of confined space...............................................................................................15
2.2.3 Industry Canada & FCC PART 15, Class "A" Limits .....................................................15
Section 3 Introduction ............................................................................................................17
3.1 Controller cover...........................................................................................................................17
3.2 Optional AC battery backup........................................................................................................18
3.3 Controller compartment heater...................................................................................................18
3.4 Refrigeration compartment door.................................................................................................18
3.5 Interface connectors ...................................................................................................................19
3.5.1 Receptacle caps ................................................................................................................20
3.6 Front panel..................................................................................................................................20
3.6.1 Keypad description ............................................................................................................21
3.6.2 Liquid crystal display..........................................................................................................22
3.6.3 Internal humidity indicator..................................................................................................22
Section 4 Installation ..............................................................................................................23
4.1 Unpacking the instrument...........................................................................................................23
4.2 Sampler installation.....................................................................................................................25
4.3 Installing the pump tube in the sensor body ...............................................................................28
4.3.1 Attaching the intake line.....................................................................................................30
4.3.2 Setting up the intake line and strainer................................................................................31
4.4 Sampler preparation ...................................................................................................................33
4.4.1 Clean the sample bottles ...................................................................................................33
4.4.2 Single bottle installation .....................................................................................................33
4.4.2.1 Full bottle shut-off installation....................................................................................33
4.5 Choosing bottle and retainer configurations ...............................................................................34
4.6 Setting up the bottles.................................................................................................................. 36
4.6.1 One-bottle sampling...........................................................................................................36
4.6.2 Two- and four-bottle sampling ...........................................................................................36
4.6.4 Twenty four-bottle sampling...............................................................................................38
4.7 Installing the distributor...............................................................................................................38
4.7.1 Distributor arm alignment...................................................................................................39
4.8 Installing the full-bottle shut-off device........................................................................................40
4.9 Power connections......................................................................................................................41
4.9.1 AC power installation......................................................................................................... 42
4.9.1.1 AWRS power connections ........................................................................................43
4.10 Auxiliary receptacle pin identification........................................................................................44
4.10.1 Splitter interface...............................................................................................................45
Section 5 Basic programming setup.....................................................................................47
5.1 Initial power-up of sampler..........................................................................................................47
5.2 Basic programming setup...........................................................................................................47
5.3 Advanced sampling.....................................................................................................................61
Section 6 Sensor setup...........................................................................................................73
6.1 Downlook ultrasonic sensor........................................................................................................73
6.2 Downlook ultrasonic sensor connection......................................................................................73
6.2.1 Downlook ultrasonic sensor programming.........................................................................73
6.2.2 Downlook ultrasonic sensor calibration..............................................................................73
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6.2.2.1 Liquid depth...............................................................................................................73
6.2.2.2 Sensor height ............................................................................................................74
6.2.2.3 Setting the invisible range .........................................................................................74
6.3 Submerged area/velocity sensor.................................................................................................74
6.3.1 Submerged area/velocity sensor programming..................................................................75
6.4 Submerged pressure sensor.......................................................................................................75
6.4.1 Submerged pressure sensor connection............................................................................75
6.4.2 Submerged pressure sensor programming........................................................................76
6.4.3 Submerged pressure sensor calibration.............................................................................76
6.5 Thermal sensor ...........................................................................................................................77
6.5.1 Thermal sensor programming ............................................................................................78
6.5.2 Thermal sensor calibration.................................................................................................78
Section 7 Optional device installation...................................................................................79
7.1 Rain gauge..................................................................................................................................79
7.1.1 Rain gauge programming...................................................................................................80
7.2 pH probe......................................................................................................................................80
7.2.1 pH probe connection..........................................................................................................80
7.2.2 pH probe programming.......................................................................................................82
7.2.3 pH probe calibration ...........................................................................................................82
7.3 ORP probe ..................................................................................................................................83
7.3.1 ORP probe connection.......................................................................................................83
7.3.2 ORP probe programming ...................................................................................................84
7.3.3 ORP probe calibration........................................................................................................84
7.3.3.1 ORP preamplifier/junction box calibration .................................................................84
7.4 Dissolved oxygen probe..............................................................................................................85
7.4.1 Dissolved oxygen probe connection...................................................................................85
7.4.2 Dissolved oxygen probe programming...............................................................................85
7.4.3 Dissolved oxygen probe temperature programming...........................................................85
7.4.4 Dissolved oxygen probe calibration....................................................................................85
7.5 Conductivity probe.......................................................................................................................86
7.5.1 Conductivity probe connection...........................................................................................86
7.5.2 Conductivity probe programming........................................................................................86
7.5.3 Conductivity temperature programming .............................................................................87
7.5.4 Conductivity probe calibration............................................................................................87
Section 8 Communication setup............................................................................................91
8.1 RS232 cable................................................................................................................................91
8.1.1 RS232 connection..............................................................................................................91
8.1.2 RS232 programming ..........................................................................................................91
8.2 Modem ........................................................................................................................................92
8.2.1 Modem connection.............................................................................................................92
8.2.2 Modem programming .........................................................................................................92
8.2.2.1 Pager option..............................................................................................................93
8.2.2.2 Reporting devices......................................................................................................94
8.3 4–20 mA option...........................................................................................................................96
8.3.1 4–20 mA programming.......................................................................................................96
8.3.2 4–20 mA calibration............................................................................................................97
8.4 Alarm relays ................................................................................................................................98
8.4.1 Alarm relays connection.....................................................................................................99
8.4.2 Alarm relays programming ...............................................................................................100
8.4.2.1 Trouble alarms.........................................................................................................100
8.4.2.2 Set Point alarms......................................................................................................101
8.5 Analog inputs.............................................................................................................................102
8.5.1 Analog inputs connection.................................................................................................102
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8.5.2 Analog inputs programming.............................................................................................103
Section 9 Maintenance..........................................................................................................105
9.1 Cleaning the sampler................................................................................................................105
9.1.1 Cleaning the refrigerator.................................................................................................. 105
9.1.2 Cleaning the sampler cabinet ..........................................................................................105
9.1.3 Cleaning the sample bottles.............................................................................................105
9.1.4 No lubrication required.....................................................................................................105
9.2 Adjusting the refrigeration compartment door (AWRS only).....................................................105
9.3 Refrigerator compressor and refrigerant...................................................................................106
9.4 Pump tubing maintenance........................................................................................................106
9.4.1 Tubing Life Estimates ......................................................................................................106
9.4.2 Replacing pump tubing....................................................................................................107
9.5 Distributor arm tubing replacement...........................................................................................108
9.6 Upgrades, repairs, general maintenance..................................................................................109
9.6.1 Electrostatic discharge (ESD) considerations..................................................................109
9.7 Internal maintenance items.......................................................................................................109
9.8 Removing and opening the controller.......................................................................................110
9.9 Re-installing the bottom panel..................................................................................................111
9.10 Fuse replacement information ................................................................................................112
9.11 Motor/gear box........................................................................................................................113
9.12 Internal desiccant module.......................................................................................................113
9.13 Memory battery.......................................................................................................................113
9.14 Resetting the circuit breaker...................................................................................................113
Section 10 Replacement parts and accessories................................................................115
10.1 Replacement Parts .................................................................................................................115
10.2 Base/bottle tray, composite/multiple sampling accessories....................................................116
Section 11 Contact information...........................................................................................117
Index.......................................................................................................................................119
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Section 1 Specifications
Specifications are subject to change without notice.
General
Dimensions
Height (lid closed): 130 cm (51 in.)
Height (lid open): 180 cm (71 in.)
Width 76 cm (30 in.)
Depth 81 cm (32 in.)
Weight 86 kg (190 lb)
Refer to Figure 1 on page 12.
Cabinet Low density polyethylene with UV inhibitor. Cabinet enclosure
rated IP 24.
Temperature range
As is: 0 to 50 ºC
With AC battery back up: 0 to 40 ºC (32 to 104 ºF)
With optional controller compartment heater: -40 to 50 ºC (-40
to 122 ºF)
With AC battery backup and controller compartment heater:
-15 to 40 ºC (5 to 104 ºF)
Recovery time Sampler temperature recovers to 4 ºC within 5 minutes after the door has been held open for one minute in 24 ºC (75 ºF)
ambient environment while in an active cooling cycle.
Pull-down time Air temperature drops from 24 ºC (75 ºF) to 4 ºC (39 ºF) within
20 minutes (typical).
Thermal system
Top mounted compressor/condenser with fan forced air
cooled condenser; 3 sided wrap-around evaporator plate;
rigid foam insulation; microprocessor controlled thermostat
maintains sample liquid at 4 °C (±1 °C); frost free;
compression gasket door seal; air cooled condenser is
protected against corrosion with a food grade epoxy; all
exposed copper tubing is insulated to avoid sweating and
condensation.
Operating environment Installation category II Pollution degree 2
Altitude 2000 m
Power requirements
115 VAC, 60Hz, 4.2A, or 6.4A with optional controller
compartment heater.
230VAC, 50Hz, 2.7A, or 4.1A with optional controller
compartment heater.
Optional ac Power Backup Pump/Controller Only: Rechargeable 7 amp-hour gel lead acid battery takes over automatically with ac line power
failure. Integral trickle charger maintains battery at full charge.
Internal battery Three AA alkaline batteries maintains program logic and real
time clock for five years.
Control panel
21 key membrane switch keypad with 4 multiple function soft
keys; 8 line x 40 character alphanumeric, back-lit
liquid-crystal graphics display. Self prompting/menu driven
program.
Data logging
Records program start time and date, stores up to 400
sample collection times/dates, all program entries,
operational status including number of minutes or pulses to
next sample, bottle number, number of samples collected,
number remaining, sample identification number, and all
logged data (i.e. level, flow, pH, stream temperature,
refrigerated compartment sample temperature, ORP, rainfall,
and any externally logged data - up to 7 external channels).
Also, up to 200 events are logged, including alarm conditions,
program run/stop events, etc.
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Specifications
Set point sample trigger
When equipped with integral flow meter,
pH/temperature/ORP meter, conductivity, and/or D.O.
monitoring options...sampling can be triggered upon an upset
condition when field selectable limits are exceeded.
Concurrent with normal sampling routine, sample liquid is
deposited in designated “trouble bottle(s)”.
Sampling modes
Multiple Bottle Time, Multiple Bottle Flow, Composite Multiple
Bottle Time, Composite Multiple Bottle Flow, Composite Time,
Composite Flow, Flow with Time Override, Variable Interval,
Start/Stop, and Level Actuation.
Program delay Three formats: (1) 1-9,999 minutes or flow pulses in one unit increments (2) programmable sampler start time/date, and (3)
programmable time/day of week.
Compressor characteristics
115VAC models: 115°C thermal overload protector, 7.1
locked rotor amps.
230 VAC models: 120°C thermal overload protector, 7.6A
peak start current.
Compressor / heater overload protection Controller: 5 amp dc circuitry fuse. 115VAC models: 7.5A circuit breaker.
230VAC : 5.0A circuit breaker.
Diagnostics Tests keypad, display, ROM, pump, and distributor.
Program lock Access code protection precludes tampering.
Communications
EPROM flash memory Via RS232. Permits embedded software upgrades in the field.
Serial interface RS232 compatible; allows on-site collection of stored data.
Modem (optional) 14400, V.32 bis, V.42, MNP2-4 error correction. V.42 bis MNP5 data compression.
MNP10-EC Cellular Protocol.
Sample bottle capacity
Bottle capacity
(24) 1-L polyethylene and/or 350 mL glass bottles. (8) 2.3-L
polyethylene and/or 1.9-L glass bottles. (4) 2.5-gal
polyethylene and/or 2½-gal glass bottles. (2) 3-gal
polyethylene and/or 2½-gal glass bottles, (1) 5.5-gal
polyethylene.
Certifications
North America
IEC
cETLus listed - Conforms to UL 61010-1, Certified to CSA
C22.2. No. 61010-1
IEC 61010-1 (safety), CISPR 11 (Class A RF emissions)
Sampling features
Multiple programs Stores up to five separate sampling programs.
Cascade Allows using two samplers in combination where the first
sampler at the completion of the program initiates the second.
Upset sampling
When equipped with integral flow meter,
pH/temperature/ORP meter, conductivity, and/or D.O.
monitoring options... Sampling can be triggered upon an
upset condition when field selectable limits are exceeded,
concurrent with normal sampling routine, sample liquid is
deposited in designated “trouble bottle(s)”. Can also be
triggered from an external trigger.
Status output Alerts operator to low main battery, low memory power, plugged intake, jammed distributor arm, sample collected,
and purge failure.
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Specifications
Automatic shutdown
Multiple Bottle Mode: After complete revolution of distributor
arm (unless Continuous Mode selected). Composite Mode:
After preset number of samples have been delivered to
composite container, from 1–999 samples, or upon full
container.
Sample volume Programmed in milliliters, in one mL increments from 10 to
9,999 mL.
Sample volume repeatability ±5% typical
Interval between samples
Time Proportional Sampling: Format: Selectable in single
increments from 1 to 9,999 minutes in one minute increments.
Flow Proportional Sampling: Continuous Volume, Variable
Time (CVVT):1–9999 units of flow volume, where units are
whatever is set up for in the integral flow option or-1–9999
external-meter flow pulses (momentary contact closure 25
msec or 5–12 V dc pulse; 4–20 mA interface optional)
Flow Proportional Sampling: Constant Time, Variable Volume
(CTVV):
Format: 999: 00 hrs:min.Selectable in 1-minute increments of
1 to 59,940 minutes.
Multiplex (multiple bottle mode) Programming allows multiple samples per bottle and/or
multiple bottles per sample collection.
Sample pump and strainer
Sample pump High speed peristaltic, dual roller, with 3/8” ID by 5/8” OD
medical grade silicone rubber pump tube.
Pump body Impact/corrosion resistant, glass reinforced Delrin®
Vertical lift 27 ft maximum
Sample transport velocity 2 ft/sec minimum, at 15 ft vertical lift in a 3/8” ID intake tube
Pump flow rate 60 mL/sec at 3 ft vertical lift in a 3/8” ID intake line
Liquid sensor Non-wetted, non-contact, ultrasonic
Intake purge Air purged automatically before and after each sample; duration automatically compensates for varying intake line
lengths
Pump/controller housing High impact injection molded ABS; submersible, watertight,
dust tight, corrosion & ice resistant
Internal clock Indicates real time and date; 0.007% time base accuracy.
Manual sample Initiates a sample collection independent of program in
progress.
Intake rinse Intake line automatically rinsed with source liquid prior to
each sample, from 0 to 3 rinses.
Intake retries Sample collection cycle automatically repeated 0–3 times if
sample is not obtained on initial attempt.
Intake tubing ¼” and 3/8” ID vinyl or 3/8” ID Teflon* lined polyethylene with
protective outer cover.
Intake strainers Choice of Teflon®and 316 stainless construction, and all 316
stainless steel in standard size and low profile for shallow
depth applications.
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Specifications
Factory Installed Options
pH/temperature/ORP meter
Control/logging Field selectable to log pH/temperature or ORP independent of sample operation or to control sample collection in
response to volume exceeding low/high setpoints.
pH/temperature sensor Temperature compensated; impact resistant ABS plastic
body.
Combination electrode with porous Teflon®-junction.
Measurement range 0 to 14 pH, -10 to 105 °C
Operating temperature -18 to 80 °C (0 to 176 °F)
Dimensions 1.9 cm dia. ×15.2 cm long (0.75 in. ×6 in.) with 1.9 cm (0.75
in.) mpt cable end.
Dissolved oxygen meter
Control/logging Field selectable to log dissolved oxygen independent of sampler operation or to control sample collection in response
to volume exceeding low/high setpoints.
Measurement method Galvanic
Sensor Temperature compensated; impact resistant polypropylene
body.
Measurement range 0 to 20 mg/L
Resolution 0.01 mg/L
Accuracy ±3% of reading or 0.1 mg/L
Operating temperature 0 to 50 °C (32 to 122 °F)
Dimensions 1.7 mm diameter × 15.7 cm long (0.65 in. ×6.25 in.) with 1.9
cm (0.75 in.)
Conductivity meter
Control/logging Field selectable to log conductivity independent of sampler connection or to control sample collection in response to
volume exceeding low/high setpoints
Sensor Temperature compensated; impact resistant polypropylene
body.
Measurement range 0 to 20 mS/cm
Resolution 0.01 mS/cm or 1 mS/cm
Accuracy ±2% of reading or 0.01 mS
Operating temperature 0 to 50 °C (32 to 122 °F)
Dimensions 1.7 cm diameter × 15.2 cm long (0.67 in. x 6 in.) with 1.9 cm
(0.75 in.) mpt cable end
Rain gauge input
General Information
For use with Tipping Bucket Rain Gauge. The Sampler
Program can be initiated upon field selectable rate of rain.
Sampler records rainfall data. Each tip = 0.25 mm (0.01in.) of
rain.
4–20mA output
General information Up to 2 output signals available. User assignable.
Maximum resistive load 600 ohms
Output voltage 24 V dc—no load
Insulation voltage Between flow meter and 4–20 mA output—2500 V ac.
Between the two 4–20 mA outputs—1500 V ac.
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Specifications
Alarm relays
General Information Four form C relays, rated 28Vrms, 5A maximum. When user assigned alarm values are set, the alarm will trip within ± 1%
of full scale error.
Downhook ultrasonic sensor 40 kHz
Accuracy 0.003 m (±0.01 ft)
Maximum range 3.35 m (11 ft) with a 3.05 m (10 ft) span
Deadband 38 cm (15 in.) maximum, self-minimizing
Material PVC housing with Buna-N acoustic window.
Cable 4 conductor with integral stainless steel support cable
Submerged depth sensor
Material 316 stainless steel body with titanium diaphragm
Cable Polyurethane sensor cable with air vent.
Cable length 7.6 m (25 ft) standard
Sensor dimensions 2.54 x 17.2 cm (1 x 6.75 in.) Probe frontal area: 0.875 in.
squared
Temperature error 2.5 psi; 0.004 to 5.75 ft ± 0.006 ft per degrees F
Maximum allowable level 6x over pressure
Operating temperature range 0 to 71 °C (32 to 160 °F)
Compensated temperature range 0 to 36 °C (32 to 96 °F)
Air intake Atmospheric pressure reference is desiccant protected.
Submerged area/velocity sensor
Depth measurement
Method Pressure transducer with stainless steel diaphragm.
Range -1.52 to 6.10 m/s (-5 to 20 ft/s)
Maximum allowable depth 3x over pressure
Temperature range
Operating temperature range: 0 to 70 ºC (32 to 158 ºF)
Level compensated temperature range: 0 to 70 ºC (32 to 158
ºF)
Note: For temperatures above 40 ºC (104 ºF) add 0.3 cm
/degree C (0.03 in / degree F)
Velocity induced depth error Compensated based on pipe geometry and flow velocity
Velocity measurement
Method Doppler ultrasonic
Transducer type Twin 1 MHz piezoelectric crystals
Recommended range -1.52 to 6.10 m/s (-5 to 20 fps)
Depth for velocity 2 cm (0.8 in.) minimum, typical
General
Material Noryl®plastic outer shell with epoxy potting
Power consumption Less than or equal to 1.2W at 12 VDC
Operating temperature 0 to 70°C (32 to 158° F)
Air intake Atmospheric pressure reference is desiccant protected.
Cable Urethane cable with air vent. Length: 9, 15, 23, and 30.5 m (30, 50, 75, and 100 ft)
Diameter: 0.91 cm (0.36 in.)
Dimensions 2.3 x 3.8 x 13.5 cm (0.9 x 1.5 x 5.31 in.)
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Specifications
Figure 1 Sampler dimensions
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Section 2 General information
2.1 Safety information
Please read this entire manual before unpacking, setting up, or operating this instrument.
Pay particular attention to all danger and caution statements. Failure to do so could result
in serious injury to the operator or damage to the equipment.
To ensure the protection provided by this equipment is not impaired, do not use or install
this equipment in any manner other than that which is specified in this manual.
2.1.1 Use of hazard information
DANGER
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.
NOTE
Information that requires special emphasis.
2.1.2 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.
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General information
This symbol, if noted on the instrument, references the instruction manual for operation
and/or safety information.
This symbol, when noted on a product enclosure or barrier, indicates that a risk of electrical shock
and/or electrocution exists and indicates that only individuals qualified to work with hazardous voltages
should open the enclosure or remove the barrier.
This symbol, when noted on the product, identifies the location of a fuse or current limiting device.
This symbol, when noted on the product, indicates that the marked item can be hot and should not be
touched without care.
This symbol, when noted on the product, indicates the presence of devices sensitive to Electro-static
Discharge and indicates that care must be taken to prevent damage to them.
This symbol, when noted on the product, identifies a risk of chemical harm and indicates that only
individuals qualified and trained to work with chemicals should handle chemicals or perform
maintenance on chemical delivery systems associated with the equipment.
This symbol, if noted on the product, indicates the need for protective eye wear.
This symbol, when noted on the product, identifies the location of the connection for Protective Earth
(ground).
This symbol, if noted on the product, indicates a pinch hazard. Keep hands and fingers clear.
This symbol, if noted on the product, indicates that the item is to be protected from fluid entry.
This symbol, if noted on the product, indicates the potential for biohazards from samples.
User/operator awareness and training are necessary if the sample/s can contain biohazards.
This symbol, if noted on the product, indicates the possible presence of a lifting hazard.
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General information
2.2 Hazardous locations
The Sigma 900 MAX All Weather Refrigerated Sampler is not approved for use in
hazardous locations as defined in the National Electrical Code.
DANGER
Although some Sigma products are designed and certified for installation in
hazardous locations as defined by the National Electrical Code, many Sigma
products are not suitable for use in hazardous locations. It is the responsibility of
the individuals who are installing the products in hazardous locations to determine
the acceptability of the product for the environment. Additionally, to ensure safety,
the installation of instrumentation in hazardous locations must be per the
manufacturer's control drawing specifications. Any modification to the
instrumentation or the installation is not recommended and may result in life
threatening injury and/or damage to facilities.
Important Note: The following information is provided to guide users of Sigma SD900
Refrigerated Samplers, Sigma SD900 All Weather Refrigerated Samplers, and 900MAX
Samplers on the dangers and risks associated with entry into confined spaces.
2.2.1 Confined space entry
On April 15, 1993, OSHA’s final ruling on CFR 1910.146, Permit Required Confined
Spaces, became law. This new standard directly affects more than 250,000 industrial
sites in the U.S.A. and was created to protect the health and safety of workers in confined
spaces.
2.2.2 Definition of confined space
A Confined Space is any location or enclosure that presents or has the immediate
potential to present one or more of the following conditions:
•An atmosphere with less than 19.5% or greater than 23.5% oxygen and/or more than
10 ppm Hydrogen Sulfide (H2S)
•An atmosphere that may be flammable or explosive due to gases, vapors, mists,
dusts, or fibers
•Toxic materials which upon contact or inhalation, could result in injury, impairment of
health, or death
Confined spaces are not designed for human occupancy. They have restricted entry and
contain known or potential hazards. Examples of confined spaces include manholes,
stacks, pipes, vats, switch vaults, and other similar locations.
Standard safety procedures must always be followed prior to entry into confined spaces
and/or locations where hazardous gases, vapors, mists, dusts, or fibers may be present.
Before entering any confined space check with your employer for procedures related to
confined space entry.
2.2.3 Industry Canada & FCC PART 15, Class "A" Limits
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may
cause undesired operation.
Changes or modifications to this unit not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment.
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General information
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 his own expense. The following techniques of
reducing the interference problems are easily applied.
1. Disconnect this equipment from its power source to verify that it is or is not the
source of the interference.
2. If this equipment is connected into the same outlet as the device with which it is
interfering, try another outlet.
3. Move this 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.
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Section 3 Introduction
The sampler is housed in a low-density polyethylene molded cabinet which is designed
for indoor or outdoor locations. No secondary enclosure is required. The refrigeration
compressor is located on top of the sampler to avoid hydrogen sulfide and other
corrosive, heavier-than-air gases. The microprocessor in the sampler controller runs all
refrigeration and heating operations directly without relying on mechanical thermostats.
No mechanical thermostat adjustments are required. All temperature settings, setup, and
calibrations are performed via the front panel.
3.1 Controller cover
The insulated, lockable top cover protects the controller compartment from extreme
weather as well as unauthorized use. A heavy duty perimeter gasket provides additional
protection from the environment and insects. The lock option (5697700) can be either
factory or field installed. The lock can be engaged when the door is open; it does not
require a padlock (Figure 2).
Figure 2 Controller lid
1Strike plate on lid 3Lock handle
2Controller cover 4Lock
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Introduction
3.2 Optional AC battery backup
The AC Battery Back Up is an enclosed 12 VDC battery designed to temporarily power a
sampler when the normal AC power source has failed. The backup battery charge is
restored and maintained by normal operation of the sampler AC power supply.
In the event of a power fail, the optional battery back up will provide power to the
controller and allow the sampling program to continue running. The battery backup does
not provide power to the refrigerated cabinet. The operating temperature for the AC
battery backup is -15 to 40 ºC (5 to 104 ºF).
The battery backup can be factory or customer installed and is available in two models.
Item number 5698200 comes with a 29 in. output cable for SD900 All Weather
Refrigerated and SD900 Portable samplers.
3.3 Controller compartment heater
WARNING: Fire Hazard. Models of AWR Samplers with cabinet heaters may ignite
flammable materials and cleaning solvents. DO NOT use any flammable liquids or
materials to clean or disinfect either the Sampler or any other component under
the cabinet hood of the AWR Samplers. Before performing any cleaning operation,
disconnect the AWR Sampler from its power source. If cleaning of the sampler
controller and pump cannot be done with water, the sampler must be disconnected
and moved to a location outside of the cabinet for cleaning. Allow sufficient time
for the sampler controller / pump to dry before reinstalling and putting it back into
service. Do not attempt to clean the controller compartment heater by spraying it
with liquids. Protect the heater from moisture such as ice and snow.
The optional controller compartment heater provides several benefits in colder climates:
•Prevents residual liquid from freezing in the pump.
•Pump tubing stays resilient, prolonging the life of the tubing, pump rollers, motor, and
gear box.
•Prevents ice and snow from building up on the cover.
•Keeps LCD functional and electronics from temperature extremes.
The controller compartment heater is a factory installed option and needs to be specified
at the time of order.
3.4 Refrigeration compartment door
The lockable front door opens by pressing the round button in the center of the latch.
When closing the door, flip the latch closed to pull the door tight. Two keys are provided
for the door lock.
Since the door gasket may compress slightly over time, an adjustment screw is provided
to allow the door to be tightened. Loosen the lock nut before making adjustments and
tighten the lock nut when done (Figure 3).
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Introduction
3.5 Interface connectors
Interface connectors are located on the left side of the controller housing.
The sampler comes standard with four interface receptacles:
•12 VDC (Power Input)
•Auxiliary (Multi-purpose input/output port)
•RS232 (Serial communications port)
•Thermal (Control port for heating and cooling system)
In addition, the sampler can be used with a wide variety of optional devices including
level and flow sensors, rain gauge, pH/ORP, D.O., temperature, conductivity, Modem,
4–20 mA current loop, and three additional analog inputs of 4–20 mA or -4.0 VDC to
+4.0 VDC.
Note: All mains powered equipment that connects to the controller terminals must be NRTL listed.
Figure 3 Door latch
1Lock nut 2Door tension adjustment screw
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Introduction
3.5.1 Receptacle caps
Interface receptacles are covered with push-on receptacle caps. These caps protect the
connector pins from dirt and moisture and should be attached to any receptacle not in
use.
3.6 Front panel
The front panel of the sampler consists of the keypad, liquid crystal display, and the
internal case humidity indicator.
Figure 4 Controller housing connectors
112 VDC 3Thermal
2RS232 4Auxiliary
12 V dc
RS232
Thermal AUX
2
4
3
1
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