Hach AS950 AWRS Instruction Manual

DOC026.97.80492
AS950 Portable Sampler
03/2021, Edition 6
Basic Installation and Maintenance
Installation de base et maintenance
Instalación y mantenimiento básicos
Instalação e Manutenção Básica
基本安装与维护
基本的な設置とメンテナンス
  

Table of Contents
English..............................................................................................................................3
Français......................................................................................................................... 27
Español.......................................................................................................................... 53
Português...................................................................................................................... 78
中文............................................................................................................................... 103
日本語........................................................................................................................... 124
.............................................................................................................................. 147
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Table of Contents
1 Table of contents on page 3
2 Online user manual on page 3
3 Specifications on page 3
4 General information on page 6
5 Installation on page 10
6 Startup on page 19
7 Maintenance on page 20
8 Troubleshooting on page 25
Section 1 Table of contents
Specifications on page 3 Startup on page 19
General information on page 6 Maintenance on page 20
Installation on page 10 Troubleshooting on page 25
Section 2 Online user manual
This Basic User Manual contains less information than the User Manual, which is available on the
manufacturer's website.
Section 3 Specifications
Specifications are subject to change without notice.
3.1 AS950 portable sampler
Specification Standard base Compact base Composite base
Dimensions Diameter: 50.5 cm (19.9 in.)
Height: 71.6 cm (28.2 in.)
Diameter: 44.1 cm
(17.4 in.)
Height: 63.8 cm
(25.1 in.)
Diameter: 50.28 cm
(19.9 in.)
Height: 79.75 cm
(31.4 in.)
Weight 15 kg (35.6 lb) with 1-L
(33.8 oz) polyethylene bottles
(24x)
14.8 kg (32.6 lb) with 10-L
(2.5 gal) polyethylene bottle
(1x)
12.2 kg (27 lb) with 575-
mL (19.44 oz)
polyethylene bottles
(24x)
12.9 kg (28.3 lb) with 10-
L (2.5 gal) polyethylene
bottle (1x)
15 kg (36 lb) with
950-mL (32.12 oz)
glass bottles (12x)
Enclosure Impact-resistant ABS, 3-section construction; double-walled base with 2.54 cm
(1 in.) insulation—direct bottle contact with ice.
Sample
temperature
0–60 °C (32–140 °F)
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Specification Standard base Compact base Composite base
Strainers 316 stainless steel in standard size, high velocity or low profile for shallow depth
applications and Teflon® or 316 stainless steel in standard size.
Sample bottle
capacity
1-L (33.8 oz) polyethylene
and/or 350-mL (11.83 oz)
glass bottles (24x)
2.3-L (0.6 gal) polyethylene
and/or 1.9-L (0.5 gal) glass
bottles (8x)
3.8-L (1 gal) polyethylene
and/or 3.8-L (1 gal) glass
bottles (4x)
3.8-L (1 gal) polyethylene
and/or 3.8-L (1 gal) glass
bottles (2x)
21-L (5.5 gal) or 15-L (4 gal)
polyethylene composite bottle
or 20-L (5.25 gal) polyethylene
or 10-L (2.5 gal) polyethylene
or 10-L (2.5 gal) glass (1x)
575-mL (19.44 oz)
polyethylene bottles
(24x)
950-mL (32.12 oz) glass
bottles (8x)
10-L (2.5 gal)
polyethylene bottle (1x)
10-L (2.5 gal) glass
bottle (1x)
21-L (5.5 gal)
polyethylene bottle
(1x)
3.2 AS950 controller
Specification Details
Dimensions (W x H x D) 31.1 x 18.9 x 26.4 cm (12.3 x 7.4 x 10.4 in.)
Weight 4.6 kg (10 lb) maximum
Enclosure PC/ABS blend, NEMA 6, IP68, corrosion and ice resistant
Pollution degree/installation
category
3, II
Protection class II
Display ¼ VGA, color
Power requirements 15 VDC supplied by a 8754500 power supply (110–120 or
230 VAC, 50/60Hz); 12 VDC supplied by an external battery
Overload protection 7 A, DC line fuse for the pump
Operating temperature 0 to 50 °C (32 to 122 °F)
Storage temperature –30 to 60 °C (–22 to 140 °F)
Storage/operating humidity 100% condensing
Pump Peristaltic high speed with spring-mounted Nylatron rollers
Pump enclosure Polycarbonate cover
Pump tubing 9.5 mm ID x 15.9 OD mm (3/8-in. ID x 5/8-in. OD) silicone
Pump tubing life 20,000 sample cycles with: 1 L (0.3 gal) sample volume, 1 rinse, 6-
minute pacing interval, 4.9 m (16 ft) of 3/8-in. intake tube, 4.6 m
(15 ft) of vertical lift, 21 °C (70 °F) sample temperature
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Specification Details
Vertical sample lift 8.5 m (28 ft) for 8.8 m (29 ft) maximum of 3/8-in. vinyl intake tube at
sea level at 20 to 25 °C (68 to 77 °F)
Pump flow rate 4.8 L/min (1.25 gpm) at 1 m (3 ft) vertical lift with 3/8-in. intake tube
typical
Sample volume Programmable in 10-mL (0.34 oz) increments from 10 to 10,000 mL
(3.38 oz to 2.6 gal)
Sample volume repeatability
(typical)
±5% of 200 mL sample volume with: 4.6 m (15 ft) vertical lift, 4.9 m
(16 ft) of 3/8-in. vinyl intake tube, single bottle, full bottle shut-off at
room temperature and 1524 m (5000 ft) elevation
Sample volume accuracy
(typical)
±5% of 200 mL sample volume with: 4.6 m (15 ft) vertical lift, 4.9 m
(16 ft) of 3/8-in. vinyl intake tube, single bottle, full bottle shut-off at
room temperature and 1524 m (5000 ft) elevation
Sampling modes Pacing: Fixed Time, Fixed Flow, Variable Time, Variable Flow,
Event
Distribution: Samples per bottle, bottles per sample and time based
(switching)
Run modes Continuous or non-continuous
Transfer velocity (typical) 0.9 m/s (2.9 ft/s) with: 4.6 m (15 ft) vertical lift, 4.9 m (16 ft) of 3/8-in.
vinyl intake tubing, 21 °C (70 °F) and 1524 m (5000 ft) elevation
Liquid detector Ultrasonic. Body: Ultem® NSF ANSI standard 51 approved, USP
Class VI compliant. Contacting liquid detector or optional non-
contact liquid detector
Air purge An air purge is done automatically before and after each sample.
The sampler automatically compensates for different intake tube
lengths.
Tubing Intake tubing: 1.0 to 30.0 m (3.0 to 99 ft) length, ¼-in. or 3/8-in. ID
vinyl or 3/8-in. ID Teflon™-lined polyethylene with protective outer
cover (black or clear)
Wetted materials Stainless steel, polyethylene, Teflon, Ultem, silicone
Memory Sample history: 4000 records; Data log: 325,000 records; Event log:
2000 records
Communications USB and optional RS485 (Modbus)
Electrical connections Power, auxiliary, optional sensors (2x), USB, distributor arm,
optional rain gauge
Analog outputs AUX port: none; optional IO9000 module: Three 0/4–20 mA
outputs to supply the recorded measurements (e.g., level, velocity,
flow and pH) to external instruments
Analog inputs AUX port: One 0/4–20 mA input for flow pacing; optional
IO9000 module: Two 0/4–20 mA inputs to receive measurements
from external instruments (e.g., third-party ultrasonic level)
Digital outputs AUX port: none; optional IO9000 module: Four low voltage,
contact closure outputs that each supply a digital signal for an alarm
event
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Specification Details
Relays AUX port: none; optional IO9000 module: Four relays controlled
by alarm events
Certifications CE, cETLus
Section 4 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.
4.1 Safety information
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 soley 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.
4.1.1 Use of hazard information
D A N G E R
Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING
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.
N O T I C E
Indicates a situation which, if not avoided, may cause damage to the instrument. Information that
requires special emphasis.
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4.1.2 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 on the instrument is referenced in the manual with a
precautionary statement.
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 a potential pinch hazard.
Electrical equipment marked with this symbol may not be disposed of in European
domestic or public disposal systems. Return old or end-of-life equipment to the
manufacturer for disposal at no charge to the user.
4.1.3 Compliance and certification
CAUTION
This equipment is not intended for use in residential environments and may not provide adequate
protection to radio reception in such environments.
Canadian Radio Interference-Causing Equipment Regulation, ICES-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 numérique 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:
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.
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4.2 Product overview
D A N G E R
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.
CAUTION
Fire hazard. This product is not designed for use with flammable liquids.
The portable sampler collects liquid samples at specified intervals and keeps the samples in bottles.
Use the sampler for a wide variety of aqueous sample applications and also with toxic pollutants and
suspended solids. Set up the sampler with different retainers or bottles. Refer to Figure 1.
Figure 1 Product overview
1 Compact base 7 Pump
2 Standard insulated base 8 Controller
3 Center section 9 Liquid detector
4 Power source 10 Non-contacting liquid detector
5 Top cover 11 Composite insulated base for one 21-L
(5.5 gal) bottle
6 Controller connections
4.2.1 Close the cover
To close the cover, align the latch plates as shown in Figure 2 and close the latches.
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Figure 2 Latch plates alignment
4.3 Product components
Make sure that all components have been received. Refer to Figure 3. If any items are missing or
damaged, contact the manufacturer or a sales representative immediately.
Figure 3 Product components
1 Base (Standard, compact or composite) 7 AC power supply (optional)
2 Components for a single-bottle option (bottle
and support can change)
8 Strainer
3 Center section with controller 9 Intake tubing, vinyl or Teflon-lined
4 Battery (optional) 10 Components for a multiple-bottle option
(bottles and retainers can change)
5 Top cover 11 Tubing coupler (Supplied with controllers
with the non-contacting liquid detector only.)
6 Battery charger (optional)
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Section 5 Installation
D A N G E R
Multiple hazards. Only qualified personnel must conduct the tasks described in this
section of the document.
5.1 Confined space precautions
D A N G E R
Explosion hazard. Training in pre-entry testing, ventilation, entry procedures,
evacuation/rescue procedures and safety work practices is necessary before entering
confined spaces.
The information that follows is supplied to help users understand the dangers and risks that are
associated with entry into confined spaces.
On April 15, 1993, OSHA's final ruling on CFR 1910.146, Permit Required Confined Spaces, became
law. This standard directly affects more than 250,000 industrial sites in the United States and was
created to protect the health and safety of workers in confined spaces.
Definition of a confined space:
A confined space is any location or enclosure that has (or has the immediate potential for) one or
more of the following conditions:
• An atmosphere with an oxygen concentration that is less than 19.5% or more than 23.5% and/or a
hydrogen sulfide (H2S) concentration that is more than 10 ppm.
• An atmosphere that can be flammable or explosive due to gases, vapors, mists, dusts or fibers.
• Toxic materials which upon contact or inhalation can cause injury, impairment of health or death.
Confined spaces are not designed for human occupancy. Confined spaces have a 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 obeyed before entry into confined spaces and/or
locations where hazardous gases, vapors, mists, dusts or fibers can be present. Before entry into a
confined space, find and read all procedures that are related to confined space entry.
5.2 Site installation guidelines
D A N G E R
Explosion hazard. The instrument is not approved for installation in hazardous locations.
This instrument is rated for an altitude of 2000 m (6562 ft) maximum. Although the use of this
equipment above the 2000 m altitude does not show any substantial safety concern, the
manufacturer recommends that users with concerns contact technical support.
Refer to the guidelines that follow for the site location evaluation.
• Obey all the safety precautions if the sampler is installed in a confined space. Refer to Confined
space precautions on page 10.
• Make sure that the temperature at the location is in the specification range. Refer to Specifications
on page 3.
• Install the sampler on a level surface or hang the sampler with the suspension harness, the
support bracket or the spanner bar. Refer to Install the sampler in a manhole on page 11 and to
the applicable installation documentation.
• Install the sampler as near the sample source as possible. Refer to Plumb the sampler
on page 13.
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• For limitations on transport velocity and maximum vertical lift, refer to Specifications on page 3.
5.3 Mechanical installation
5.3.1 Install the sampler in a manhole
Install the sampler above the sample water in a manhole. Install the sampler with a spanner bar or a
support bracket. Install the spanner bar inside the manhole. The spanner bar is supported by
pressure against the walls. The support bracket has the same width as the manhole cover. Install the
support bracket directly below the cover for support. For the accessories, refer to the expanded
manual on the manufacturer's website. Refer to the documentation supplied with the accessories to
install the sampler.
5.4 Prepare the sampler
5.4.1 Clean the sample bottles
Clean the sample bottles and caps with a brush, water and a mild detergent. Flush the sample
bottles with fresh water followed by a distilled water rinse.
5.4.2 Install a single bottle
When a single bottle is used to collect one composite sample, do the steps that follow. When multiple
bottles are used, refer to Install the first bottle for multiple sample collections on page 11.
When the bottle is full, the full bottle shut-off stops the sample program. Install the sample bottle as
shown in Figure 4.
Figure 4 Single bottle installation
1 Polyethylene bottle, 10 L (2.6 gal) 6 Polyethylene bottle, 21 L (5.5 gal)
2 Glass bottle, 10 L (2.6 gal) 7 Compact base
3 Support for standard base and 10 L (2.6 gal)
glass bottle
8 Standard insulated base
4 Polyethylene bottle, 15 L (4 gal) 9 Composite insulated base for 21 L (5.5 gal)
bottle
5 Polyethylene bottle, 19 L (5 gal)
5.4.3 Install the first bottle for multiple sample collections
Use multiple bottles to collect samples into separate bottles or into more than one bottle. The
distributor moves the sample tube above each bottle. Install the bottles in the sampler base as shown
in Figure 5. Install the first sample bottle (number 1) below the label in the sampler base. Install the
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remaining bottles in increasing numbers in the direction shown by the label. Refer to Figure 6
on page 13 for a diagram of necessary components.
Figure 5 Bottle number 1 installation
1 Bottle number 1 location (compact base) 6 Elastic straps
2 Bottle number 1 location for 24 bottles 7 Composite insulated base for 21 L (5.5 gal)
bottle
3 Bottle number 1 location for 8 bottles 8 Standard insulated base
4 Bottle number 1 location for 2 or 4 bottles 9 Compact base
5 Retainer
5.4.4 Install multiple bottles
When multiple bottles are installed, a distributor arm moves the sample tube over each bottle.
Sample collection automatically stops when the specified number of samples have been collected.
1. Install the first sample bottle (number 1) below the label in the sampler base. Refer to Install the
first bottle for multiple sample collections on page 11.
2. Assemble the sample bottles as shown in Figure 6. For eight or more bottles, make sure that the
first bottle goes next to the bottle one indicator in the clockwise direction.
3. Put the bottle assembly in the sampler. For eight or more bottles, align the wires in the slots in the
bottom tray.
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Figure 6 Multiple bottle installation
1 Retainer/Positioner for 8 950-mL (32.12-oz)
glass bottles
8 Bottle set, 4 3.8-L (1-gal) poly or glass
2 Retainer for 8 or 24 glass or poly bottles 9 Bottle set, 8 1.9-L (0.5-gal) glass or 8 2.3-L
(0.6-gal) poly
3 Retainer for 4 3.8-L (1 gal) glass or poly
bottles
10 Bottle set, 24 1-L (0.26 gal) poly
4 Retainer for 24 350-mL (11.83 oz) glass
bottles
11 Bottle set, 24 350-mL (11.83 oz) glass
5 Bottle set, 8 950-mL (32.12 oz) glass 12 Compact base
6 Bottle set, 24 575-mL (19.44 oz) poly 13 Standard base
7 Bottle set, 2 3.8-L (1-gal) poly or glass
5.5 Plumb the sampler
Install the strainer in the middle of the sample stream (not near the surface or the bottom) to make
sure that a representative sample is collected. Refer to Figure 7.
1. Connect the tubing to the sampler as shown in Figure 8.
Note: When Teflon-lined tubing is used, use the tubing connection kit for Teflon-lined PE tubing.
2. Install the intake tube and strainer in the main stream of the sample source where the water is
turbulent and well-mixed.
• Make the intake tube as short as possible. Refer to Specifications on page 3 for the minimum
intake tubing length.
• Keep the intake tube at a maximum vertical slope so that the tube drains completely between
samples.
Note: If a vertical slope is not possible or if the tube is pressurized, disable the liquid sensor. Calibrate the
sample volume manually.
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• Make sure that the intake tube is not pinched.
Figure 7 Instrument installation
1 Strainer 3 Intake tube
2 Vertical lift
Figure 8 Intake tube installation
5.6 Electrical installation
5.6.1 Connect the sampler to power
D A N G E R
Electrocution hazard. If this equipment is used outdoors or in potentially wet locations, a
Ground Fault Circuit Interrupt (GFCI/GFI) device must be used for connecting the
equipment to its main power source.
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D A N G E R
Fire hazard. Install a 15 A circuit breaker in the power line. A circuit breaker can be the
local power disconnect, if located in close proximity to the equipment.
D A N G E R
Electrocution hazard. Protective Earth Ground (PE) connection is required.
WARNING
Electrocution hazard. Make sure that there is easy access to the local power disconnect.
Connect the sampler to a battery (8754400) or an AC power supply (8754500US, 8754500EU or
8754500UK). Refer to Figure 9.
Figure 9 Connect the sampler to power
5.6.2 Controller connections
WARNING
Electrical shock hazard. Externally connected equipment must have an applicable
country safety standard assessment.
Figure 10 shows the electrical connectors on the controller.
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Figure 10 Controller connections
1 Sensor 2 port (optional) 5 Rain gauge/RS485 port (optional)
2 Power supply port 6 Auxilliary I/O port
3 Sensor 1 port (optional) 7 Distributor arm/Full bottle shut-off port
4 USB connector
5.6.3 Connect a Sigma 950 or FL900
If sample pacing is flow based, supply the controller with a flow input signal (pulse or 4–20 mA).
Connect a Sigma 950 or an FL900 Flow Logger to the AUX I/O port.
As an alternative, connect a flow sensor to a sensor port. Refer to Connect a sensor on page 19.
Item to collect: Multi-purpose auxiliary full cable, 7 pin
1. Connect one end of the cable to the flow meter. Refer to the flow meter documentation.
2. Connect the other end of the cable to the AUX I/O port on the controller.
5.6.4 Connect a non-Hach flow meter
To connect a non-Hach flow meter to the AUX I/O port, do the steps that follow.
Items to collect: Multi-purpose auxiliary half cable, 7 pin
1. Connect one end of the cable to the AUX I/O port on the controller.
2. Connect the other end of the cable to the flow meter. Refer to Figure 11 and Table 1.
Note: In some installations, it is necessary to connect external equipment to the Pulse input, Special output
and/or Program Complete output with long cables. Since these are ground-referenced pulse interfaces, false
signaling can be caused by transient ground differences between each end of the cable. High ground
differentials are typical in heavy industrial environments. In such environments, it may be necessary to use
third-party galvanic isolators (e.g., optocouplers) in line with the affected signal(s). For the Analog input,
external ground isolation is typically not necessary because the 4–20 mA transmitter typically supplies isolation.
Figure 11 Auxiliary connector
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Table 1 Half cable wiring information
Pin Signal Color1Description Rating
1 +12 VDC
power
output
White Power supply positive output.
Only use with pin 2.
Battery power to the I/O module:
12 VDC nominal; Power supply to the
I/O module: 15 at 1.0 A maximum.
2 Common Blue Negative return of power
supply. When the power
supply is used, pin 2 is
connected to earth ground2.
3 Pulse input
or Analog
input
Orange This signal is a sample
collection trigger from the
flow logger (pulse or
4–20 mA) or a simple floating
(dry) contact closure.
Pulse input—Reacts to a positive
pulse with respect to pin 2. Termination
(pulled low): pin 2 through a series
1 kΩ resistor and 10 kΩ resistor. A
7.5 zener diode is in parallel with the
10 kΩ resistor as a protection device.
Analog input—Reacts to the analog
signal that enters pin 3 and returns on
pin 2. Input burden: 100 Ω plus 0.4 V;
Input current (internal limit): 40 to
50 mA maximum3
Absolute maximum input: 0 to 15 VDC
with respect to pin 2.
Signal to make the input active: 5 to
15 V positive-going pulse4 with respect
to pin 2, 50 millisecond minimum.
1The wire color refers to the colors of multi-purpose cables (8528500 and 8528501).
2All mains powered equipment that connects to the controller terminals must be NRTL listed.
3Long-term operation in this state voids the warranty.
4Source impedance of the driving signal must be less than 5 kΩ.
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Table 1 Half cable wiring information (continued)
Pin Signal Color1Description Rating
4 Liquid level
input or
Auxiliary
control
input
Black Liquid level input—Start or
continue the sampling
program. A simple float level
switch can supply input.
Auxiliary control input—
Start a sampler after the
sampling program on another
sampler ends. As an
alternative, start a sampler
when a trigger condition
occurs. For example, when a
high or low pH condition
occurs, the sampling
program starts.
Termination (pulled high): internal +5 V
supply through an 11 kΩ resistance
with a series 1 kΩ resistor and 7.5 V
zener diode terminated to pin 2 for
protection. Trigger: High to low voltage
with a low pulse of 50 milliseconds
minimum.
Absolute maximum input: 0 to 15 VDC
with respect to pin 2. Signal to make
the input active: external logic signal
with 5 to 15 VDC power source. The
drive signal must be typically high. The
external driver must be able to sink
0.5 mA at 1 VDC maximum at the logic
low level.
A logic high signal from a driver with a
power source of more than 7.5 V will
source current into this input at the rate
of: I = (V – 7.5)/1000 where I is the
source current and V is the power
supply voltage of the driving logic.
Dry contact (switch) closure:
50 millisecond minimum between pin 4
and pin 2. Contact resistance: 2 kΩ
maximum. Contact current: 0.5 mA DC
maximum
5 Special
output
Red This output goes from 0 to
+12 VDC with respect to pin
2 after each sample cycle.
Refer to the Mode setting of
the hardware settings for the
AUX I/O port. Refer to the
AS950 operations
documentation.
This output has protection against short
circuit currents to pin 2. External load
current: 0.2 A maximum
Active high output: 15 VDC nominal
with AC power to the AS950 controller
or a 12 VDC nominal with battery
power to the AS950 controller.
1The wire color refers to the colors of multi-purpose cables (8528500 and 8528501).
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Table 1 Half cable wiring information (continued)
Pin Signal Color1Description Rating
6 Program
Complete
output
Green Typical state: open circuit.
This output goes to ground
for 90 seconds at the end of
the sampling program.
Use this output to start
another sampler or to signal
an operator or data logger at
the end of the sampling
program.
This output is an open drain output with
18 V zener clamp diode for over-
voltage protection. The output is active
low with respect to pin 2.
Absolute maximum ratings for the
output transistor: sink current = 200 mA
DC maximum; external pull-up voltage
= 18 VDC maximum
7 Shield Silver The shield is a connection to
earth ground when AC power
is supplied to a sampler to
control RF emissions and
susceptibility to RF
emissions.
The shield is not a safety ground. Do
not use the shield as a current carrying
conductor.
The shield wire of cables that are
connected to the AUX I/O port and are
more than 3 m (10 ft) should connected
to pin 7.
Only connect the shield wire to earth
ground at one end of the cable to
prevent ground loop currents.
5.6.5 Connect a sensor
To connect a sensor (e.g., pH or flow sensor) to a sensor port, refer to Figure 12.
Figure 12 Connect a sensor
Section 6 Startup
6.1 Set the instrument to on
Push and hold the Power key on the controller to set the instrument to on.
6.2 Preparation for use
Install the analyzer bottles and stir bar. Refer to the operations manual for the startup procedure.
1The wire color refers to the colors of multi-purpose cables (8528500 and 8528501).
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Section 7 Maintenance
D A N G E R
Multiple hazards. Only qualified personnel must conduct the tasks described in this
section of the document.
D A N G E R
Electrocution hazard. Remove power from the instrument before doing maintenance or
service activities.
WARNING
Biohazard exposure. Obey safe handling protocols during contact with sample bottles
and sampler components.
WARNING
Multiple hazards. The technician must make sure that the equipment operates safely and
correctly after maintenance procedures.
N O T I C E
Do not disassemble the instrument for maintenance. If the internal components must be cleaned or
repaired, contact the manufacturer.
7.1 Clean the instrument
CAUTION
Fire hazard. Do not use flammable agents to clean the instrument.
If water is not sufficient to clean the controller and the pump, disconnect the controller and move the
controller away from the sampler. Allow sufficient time for the controller and pump to dry before the
parts are re-installed and put back into service.
Clean the sampler as follows:
• Sampler enclosure—Clean the internal and external surfaces with a damp cloth and a mild
detergent. Do not use abrasive cleaners or solvents.
• Sample bottles—Clean the bottles with a brush and water and a mild detergent. Rinse with fresh
water and then with distilled water. Use an autoclave to clean glass bottles if necessary.
7.2 Replace the desiccant
A desiccant cartridge in the controller absorbs moisture and prevents corrosion. Monitor the
desiccant color through the window. Refer to Figure 13. Fresh desiccant is orange. When the color is
green, replace the desiccant.
1. Unscrew and remove the desiccant cartridge. Refer to Figure 13.
2. Remove the plug and discard the spent desiccant.
3. Fill the desiccant tube with fresh desiccant.
4. Install the plug.
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