Campbell Scientific CVS4200, BVS4300 User Manual
CVS4200 / BVS4300
Stationary Samplers
Revision: 8/13
Copyright © 2011-2013
Campbell Scientific, Inc.
Warranty
Subject to the following limited warranty, CVS4200 / BVS4300 Stationary
Samplers, with the exception of the refrigerator unit, are warranted for thirtysix (36) months. The refrigerator unit supplied with the CVS4200 / BVS4300
is warranted for twelve (12) months.
“PRODUCTS MANUFACTURED BY CAMPBELL SCIENTIFIC, INC. are
warranted by Campbell Scientific, Inc. (“Campbell”) to be free from defects in
materials and workmanship under normal use and service for twelve (12)
months from date of shipment unless otherwise specified in the corresponding
Campbell pricelist or product manual. Products not manufactured, but that are
re-sold by Campbell, are warranted only to the limits extended by the original
manufacturer. Batteries, fine-wire thermocouples, desiccant, and other
consumables have no warranty. Campbell’s obligation under this warranty is
limited to repairing or replacing (at Campbell’s option) defective products,
which shall be the sole and exclusive remedy under this warranty. The
customer shall assume all costs of removing, reinstalling, and shipping
defective products to Campbell. Campbell will return such products by surface
carrier prepaid within the continental United States of America. To all other
locations, Campbell will return such products best way CIP (Port of Entry)
INCOTERM® 2010, prepaid. This warranty shall not apply to any products
which have been subjected to modification, misuse, neglect, improper service,
accidents of nature, or shipping damage. This warranty is in lieu of all other
warranties, expressed or implied. The warranty for installation services
performed by Campbell such as programming to customer specifications,
electrical connections to products manufactured by Campbell, and product
specific training, is part of Campbell’s product warranty. CAMPBELL
EXPRESSLY DISCLAIMS AND EXCLUDES ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. Campbell is not liable for any special, indirect,
incidental, and/or consequential damages.”
Assistance
Products may not be returned without prior authorization. The following
contact information is for US and international customers residing in countries
served by Campbell Scientific, Inc. directly. Affiliate companies handle
repairs for customers within their territories. Please visit
www.campbellsci.com to determine which Campbell Scientific company serves
your country.
To obtain a Returned Materials Authorization (RMA), contact CAMPBELL
SCIENTIFIC, INC., phone (435) 227-9000. After an applications engineer
determines the nature of the problem, an RMA number will be issued. Please
write this number clearly on the outside of the shipping container. Campbell
Scientific’s shipping address is:
CAMPBELL SCIENTIFIC, INC.
RMA#_____
815 West 1800 North
Logan, Utah 84321-1784
For all returns, the customer must fill out a “Statement of Product Cleanliness
and Decontamination” form and comply with the requirements specified in it.
The form is available from our web site at www.campbellsci.com/repair. A
completed form must be either emailed to repair@campbellsci.com or faxed to
(435) 227-9106. Campbell Scientific is unable to process any returns until we
receive this form. If the form is not received within three days of product
receipt or is incomplete, the product will be returned to the customer at the
customer’s expense. Campbell Scientific reserves the right to refuse service on
products that were exposed to contaminants that may cause health or safety
concerns for our employees.
Table of Contents
PDF viewers: These page numbers refer to the printed version of this document. Use the
PDF reader bookmarks tab for links to specific sections.
1. Introduction.................................................................1
2. Cautionary Statements...............................................1
3. Initial Inspection .........................................................2
4. Quickstart .................................................................... 2
4.1 Cabinet Positioning ..............................................................................2
4.2 Attach Intake Hose...............................................................................3
4.3 Wiring ..................................................................................................4
4.3.1 CVS4200 Wiring Procedure .........................................................4
4.3.2 BVS4300 Wiring Procedure .........................................................5
4.4 Program the Sampler............................................................................5
4.4.1 Automatic Sampling Program.......................................................5
4.4.2 Taking a Manual Sample ..............................................................6
4.4.3 Viewing Program Parameters .......................................................7
4.4.4 Setting Programming Parameters Individually .............................7
4.5 Installation Checklist............................................................................7
5. Product Overview .......................................................7
5.1 Components .........................................................................................9
5.1.1 BVS4300 Sampler Components ...................................................9
5.1.2 CVS4200 Sampler Components .................................................11
5.1.3 Sampler Vacuum System Components.......................................13
5.2 Sample Container Options .................................................................15
5.3 Discrete and Composite Overview.....................................................15
5.3.1 Discrete Sampling.......................................................................15
5.3.2 Composite Sampling...................................................................16
5.4 Sinker / Strainer..................................................................................16
5.5 Special Systems..................................................................................17
5.5.1 5/8 in. Systems............................................................................17
5.5.2 Sanitary Systems – Teflon and Glass..........................................17
5.5.3 Pressurized Source......................................................................18
6. Specifications ...........................................................20
6.1 BVS4300 Outdoor Stationary Sampler Specifications.......................21
6.2 CVS4200 Indoor Stationary Sampler Specifications .........................22
6.3 Controller Specifications....................................................................22
6.4 Vacuum System Specifications..........................................................24
6.5 Sample Transport Velocity.................................................................24
6.5.1 Using Velocity to Calculate Purge Time.....................................26
6.5.2 Horizontal/Vertical Combinations ..............................................26
i
Table of Contents
7. Operation ...................................................................26
7.1 Use in Adverse Conditions................................................................ 26
7.1.1 Exhaust....................................................................................... 26
7.1.2 Instrument Air ............................................................................ 26
7.1.3 Freezing Conditions ................................................................... 27
7.2 Power Line/Wiring Considerations ................................................... 27
7.3 Operating Sequence........................................................................... 28
7.3.1 Sampling Sequence .................................................................... 28
7.3.2 Line Voltage Failure................................................................... 29
7.4 Operating Instructions ....................................................................... 29
7.4.1 Sample Volume Adjustments..................................................... 29
7.4.2 Liquid Sensing Rod.................................................................... 30
7.5 Battery ............................................................................................... 30
7.5.1 Charging 12 Vdc Battery and Reverse Polarity Protection ........ 30
7.5.2 Sampler Controller Backup Battery ........................................... 31
7.6 Programming..................................................................................... 32
7.6.1 Guidelines .................................................................................. 32
7.6.1.1 Flashing Text................................................................... 32
7.6.1.2 Real Time Clock.............................................................. 32
7.6.1.3 Total Bottles .................................................................... 32
7.6.2 Touchpad Keys........................................................................... 33
7.6.3 General Terms............................................................................ 35
7.6.4 Programming START DELAY.................................................. 37
7.6.4.1 START DELAY Overview ............................................. 37
7.6.4.2 START DELAY using Time/Day ................................... 38
7.6.4.3 START DELAY using Pulse Input ................................. 40
7.6.4.4 START DELAY using 4-20mA Input............................. 41
7.6.4.5 START DELAY using External Contact......................... 43
7.6.4.6 START DELAY using Level Control ............................. 43
7.6.5 Programming SAMPLE INITIATION....................................... 45
7.6.5.1 SAMPLE INITIATION Overview.................................. 45
7.6.5.2 SAMPLE INITIATION using Interval Time .................. 46
7.6.5.3 SAMPLE INITIATION using Pulse Input...................... 47
7.6.5.4 SAMPLE INITIATION using 4-20mA Input.................. 49
7.6.5.5 SAMPLE INITIATION using External Contact ............. 50
7.6.6 Programming PROGRAM TYPE .............................................. 51
7.6.6.1 PROGRAM TYPE Overview.......................................... 51
7.6.6.2 PROGRAM TYPE - Composite...................................... 52
7.6.6.3 PROGRAM TYPE - Daily Cycle.................................... 54
7.6.6.4 PROGRAM TYPE - Daily Cycle for Dual Station ......... 55
7.6.6.5 PROGRAM TYPE - Consecutive ................................... 57
7.6.6.6 PROGRAM TYPE - Multi-Composite............................ 59
7.6.6.7 PROGRAM TYPE - Timed Step..................................... 60
7.6.7 Programming OTHER OPTIONS.............................................. 62
7.6.7.1 OTHER OPTIONS Overview ......................................... 62
7.6.7.2 OTHER OPTIONS - Clock ............................................. 64
7.6.7.3 OTHER OPTIONS - Purge Time.................................... 65
7.6.7.4 OTHER OPTIONS - Pinch Valve................................... 67
7.6.7.5 OTHER OPTIONS - Fault Shutdown ............................. 68
7.6.8 Viewing Information .................................................................. 69
7.6.8.1 Viewing Programmed Information.................................. 69
7.6.8.2 Viewing Generated Information...................................... 72
7.7 Test Procedure................................................................................... 73
ii
Table of Contents
8. Troubleshooting........................................................73
9. Maintenance ..............................................................74
9.1 General Maintenance .........................................................................74
9.2 Maintenance of Refrigerator ..............................................................75
9.2.1 Cleaning ......................................................................................75
9.2.2 Temperature Control...................................................................75
9.3 Testing System Vacuum ....................................................................76
9.4 Controller Battery Repalcement Procedure........................................76
9.5 Storage ...............................................................................................76
Appendices
A.
Principles of Operation .......................................... A-1
B. Parts List ................................................................. B-1
Figures
Tables
4-1. Sampler installation..............................................................................3
4-2. Terminal block wiring diagram............................................................4
5-1. Diagrams of the BVS4300 basic unit...................................................9
5-2. Diagrams of the CVS4200 basic unit.................................................11
5-3. Diagram of the CVS/BVS vacuum system ........................................13
5-4. Discrete removable bottle tray (24 bottles) ........................................16
5-5. Composite two gallon bottle with lid .................................................16
5-6. Lead sinker.........................................................................................17
5-7. Stainless-steel sinker/strainer .............................................................17
5-8. Vertical loop for pressurized source...................................................18
5-9. Flow-through chamber for pressurized source...................................19
7-1. Battery performance curve.................................................................31
5-1. BVS4300 Component Descriptions ...................................................10
5-2. CVS4200 Sampler Component Descriptions.....................................12
5-3. Vacuum System Component Descriptions.........................................14
5-4. Sample Container Options .................................................................15
5-5. Sanitary System Changes...................................................................18
6-1. BVS4300 Sampler Specifications ......................................................21
6-2. CVS4200 Sampler Specifications ......................................................22
6-3. Controller Specifications....................................................................22
6-4. Controller Specifications....................................................................23
6-5. Vacuum System Specifications..........................................................24
6-6. Vertical Velocity ................................................................................24
6-7. Horizontal Lift....................................................................................25
7-1. Touchpad Button Descriptions...........................................................33
B-1. CVS/BVS Replacement Parts ..........................................................B-1
iii
Table of Contents
iv
CVS4200 / BVS4300 Stationary
Samplers
1. Introduction
The CVS4200-series and BVS4300-series Stationary Samplers are automatic
liquid samplers for water and wastewater applications. They use reliable, longlasting, vacuum technology. This sampling method results in faster sample
draws and less disturbance of the sample contents. There is also less wear on
the tubing, resulting in less-frequent maintenance.
Campbell Scientific offers the following stationary samplers:
• CVS4200C—composite indoor sampler
• CVS4200D—discrete indoor sampler
• BVS4300C—composite outdoor sampler
• BVS4300D—discrete outdoor sampler
Composite samplers deposit all samples into a single container. Discrete
samplers place each sample into a separate container.
Before installing the water sampler, please study:
• Section 2, Cautionary Statements
• Section 3, Initial Inspection
• Section 4, Quickstart
2. Cautionary Statements
• A noise free or clean line from primary power is highly recommended to
supply the sampler.
• Never run the sampler’s power wiring in conduit containing phone lines or
power wiring of other devices.
• If possible, site the sampler away from ac power lines.
• Use a BVS4300 with a factory installed heater (option -H) and an
insulated cabinet (option -3) if the sampler will be located outdoors in
freezing conditions. Refer to Section 7.1, Use in Adverse Conditions, for
more information.
• In extreme cold conditions, insulate or heat the intake hose. If the hose is
positioned mostly vertical, the most prone point of freezing is where the
hose enters the frozen water source.
• Use a BVS4300 with the cabinet circulation fan (option -G) if the sampler
will be placed directly in the sun. This keeps the refrigeration unit from
getting overtaxed.
1
CVS4200 / BVS4300 Stationary Samplers
• The intake hose should be 7.6 m (25 ft) or longer. Shorter hoses do not
provide sufficient back pressure to the metering chamber, allowing the
pump to efficiently expel all solids into the sampler container.
• Under adverse atmospheric conditions (humid, corrosive, etc.), connect air
to the BVS4300 and use it to purge the cabinet—providing clean air for
the pump intake.
CAUTION
Failure to purge the cabinet may damage the sampler and
void the warranty (see Section 7.1, Use in Adverse
Conditions, for more information).
• Vent the exhaust outdoors if detrimental air conditions exist in the sample
lines of a CVS4200 sampler (see Section 7.1, Use in Adverse Conditions,
for more information).
3. Initial Inspection
• Upon receipt of the CVS4200 or BVS4300, inspect the packaging and
contents for damage. File damage claims with the shipping company.
• Immediately check package contents against the shipping documentation.
Contact Campbell Scientific about any discrepancies.
4. Quickstart
Please refer to Section 7.1, Use in Adverse Conditions, if the sampler is used
under adverse atmospheric conditions such as extreme humidity.
4.1 Cabinet Positioning
2
NOTE
Install the sampler as close as possible to the sampling site with a minimum of
10 cm (4 in) of air space around the cabinet (see FIGURE 4-1). Level and
secure the unit.
Sampler must be located above sample source, or liquid will
flood the machine. For situations where this is not possible,
please contact a Campbell Scientific applications engineer for
solutions on pressurized sources.
CVS4200 / BVS4300 Stationary Samplers
FIGURE 4-1. Sampler installation
4.2 Attach Intake Hose
1. Connect the intake hose to the sampler’s volume control tube (item 1 in
FIGURE 5-1 or FIGURE 5-2).
a. If using the 26925-L PVC Intake Hose with option -QD, attach the
hose using the quick deploy connector.
b. Otherwise, place the hose in warm water for a few minutes. Slip the
hose over the volume control tube and secure the hose using the
clamp.
2. Route the hose so that it has a near continuous slope from the sampler to
the source liquid. This keeps hose clear and fully drained.
3. Place sinker/strainer in source liquid. The sinker/strainer needs to be
placed at a depth in which it will remain submerged regardless of the flow
velocities.
3
CVS4200 / BVS4300 Stationary Samplers
4.3 Wiring
FIGURE 4-2. Terminal block wiring diagram
4.3.1 CVS4200 Wiring Procedure
1. Remove the hood from chassis. The terminals for field connections are
located along the back of the tray (11 on FIGURE 5-2). If the sampler has
been provided with a refrigerator, the power plug is also located here.
2. Route cabling from external devices through the clearance holes and
connect to the terminal block (see FIGURE 4-2).
NOTE
Use shielded cables for wiring remote/external functions and
terminate the shield at the AC ground terminal on the sampler
main terminal block, or at the remote site, but not both.
3. Bring power from main distribution panel along a path that does not
parallel any existing power wiring to motors, solenoids, or contactors.
When sampler power line must cross existing power lines, do so at right
angles.
4. Replace hood.
4
4.3.2 BVS4300 Wiring Procedure
1. Remove four retaining bolts (1/4–20) found across the top of the
instrument panel (18 in FIGURE 5-1).
2. If the sampler is refrigerated, make sure the discharge tubing and container
full wiring (if so equipped) are extracted from the fridge.
3. Slide out instrument section. The drawer glides that the sampler chassis is
mounted on are designed to fully extend from the cabinet.
4. Route cabling from external devices through the 2.75 inch conduit knockouts and connect to the terminal block (see FIGURE 4-2). The terminals
for field connection are located along the side at the rear of the tray.
CVS4200 / BVS4300 Stationary Samplers
NOTE
Use shielded cables for wiring remote/external functions and
terminate the shield at the AC ground terminal on the sampler
main terminal block, or at the remote site, but not both.
5. Bring power from main distribution panel along a path that does not
parallel any existing power wiring to motors, solenoids, or contactors.
When sampler power lines must cross existing power lines, do so at right
angles.
6. Ensure that the wiring harness will not rub or catch in the slide
mechanisms before sliding the instrument section back into the cabinet.
7. Replace the four retaining bolts. Although not required for operation, use
of these retaining bolts reduces the effects of vibration that occur when the
sampler is cycling.
4.4 Program the Sampler
4.4.1 Automatic Sampling Program
To begin a new, quick program:
Press “SET”
Press “NEW ENTRIES”. Press “ENTER”
START DELAY (how you will be delaying the
sample program until certain external conditions are
met). Select, using arrows, which parameter you
would like, and adjust settings (see Section 7.6.4,
Programming START DELAY). Options: DISABLE;
TIME/DAY; PULSE INPUT; 4-20mA INPUT;
EXTERNAL CONTACT; LEVEL CONTROL.
5
CVS4200 / BVS4300 Stationary Samplers
Press “ENTER” twice
SAMPLE INITIATION (parameters for frequency
of samples). Select, using arrows, which parameter
you would like, and adjust settings (see Section
7.6.5, Programming SAMPLE INITIATION).
Options: DISABLE; INTERVAL TIME; PULSE
INPUT; 4-20mA INPUT; EXTERNAL CONTACT.
Press “ENTER” twice.
PROGRAM TYPE (which type of sampling
program). Select, using arrows, which parameter
you would like, and adjust settings (see Section
7.6.6, Programming PROGRAM TYPE). Options:
COMPOSITE; MULTI-COMPOSITE;
CONSECUTIVE; DAILY CYCLE; TIMED STEP
(override).
Press “ENTER” twice.
PURGE TIME (set how long sampler will purge
between samples, minimum of 10 seconds). Using #
keys, enter the purge time needed for application
(e.g., 100 ft draw at 5 ft/sec = 20 sec). Press
“ENTER”.
Press “RESTART” twice.
Sampling is ready to go.
4.4.2 Taking a Manual Sample
To take a sample manually, simply press the
“Manual Sample” button twice. Manual
samples will not interrupt the current
automatic sampling program.
6
CVS4200 / BVS4300 Stationary Samplers
4.4.3 Viewing Program Parameters
To view the program or remaining time,
press the “VIEW” button, followed by the
button representing what you want to see;
for example, “REMAINING TIME”.
4.4.4 Setting Programming Parameters Individually
To modify any of the settings individually,
press the “SET” button followed by the
appropriate button based on what parameter
is being changed.
4.5 Installation Checklist
Check the following items prior to use of sampler:
1) Sampler is mounted securely and level.
2) Intake Hose: – Free of kinks.
– Properly installed into liquid.
– Properly connected to volume control tube on
metering chamber.
3) Discharge hose: – Free of kinks.
– Natural downward slope to sample container.
– Properly connected to (or in) sample container.
4) Proper exhaust and instrument air connections (see Section 7.1, Use in
Adverse Conditions).
5) Power requirements: – Check terminal strip connections.
– Test all outside sources of sampler controls.
5. Product Overview
The BVS4300 and CVS4200 Stationary Samplers are automatic liquid
samplers for water and wastewater applications. CVS/BVS Samplers are
capable of gathering fluid automatically from a variety of sources, including
containers, open channels, sewers, pipes, and any open source of water.
Samplers are designed for reliable, unattended sample collection. Refrigerated
units will keep the temperature of the deposited liquid at 4ºC (39.2ºF) until the
samples are gathered and brought back to the laboratory for analysis.
There are a variety of methods for depositing samples. Composite sampling is
used where samples are deposited, over time, into one container. Discrete
systems are used when multiple bottles are needed. These are also called
“sequential” systems, and involve a stepper with distributor arm which
dispenses the liquid into a bottle, then moves to the next bottle.
7
CVS4200 / BVS4300 Stationary Samplers
Operating temperature for CVS4200 indoor samplers is 10º to 50ºC (50º to
122ºF), adaptable down to 0ºC (32ºF) upon request. The operating temperature
for BVS4300 outdoor samplers with heater and insulation is –40º to 50ºC (–40º
to 122ºF). Without insulation and heater, the BVS4300 operating temperature
is 0º to 50ºC (32º to 122ºF).
Samples can be triggered by a variety of means. The internal clock on the
controller can be set to sample based on time/day (for example, sample every
hour). There are also a variety of external inputs that can be connected to
control sampling. Pulse count is useful for sampling after a certain number of
pulses have been reached (for example, using a rain gauge to trigger sampling).
The 4-20mA option is useful for flow-based sampling (for example, using a
flow meter to trigger sampling after a certain volume of water has passed by).
External contact is used to control the sampler from another datalogger, and is
useful when full external control is desired. Level control is the option to
choose when the application has starts and stops (for example, using a float
switch to trigger sampling when water is present, then stop sampling when the
water drops below the set level).
When sampling is initiated, liquid travels through the intake tube into the
metering chamber. The amount of water taken is set mechanically using the
liquid sensing rod and the volume control tube, which means sample accuracy
is precise every time, usually within ±2% or ±2 ml.
Once the pre-set amount has been reached, all excess liquid is purged from the
system, and the sample is dropped into a container. Sample containers range
from 500 ml (500 cc or 2 cups) wedges in discrete systems, up to 20 liters (5
gallons) containers for composite systems.
Intake tube is offered in either 9.5 mm (3/8 in) ID or 15.9 mm (5/8 in) ID.
Transport velocity varies depending on height and distance being sampled. For
most situations the sampler pulls at over 1.5 m s
–1
(5 ft s–1). For an in-depth
speed chart, refer to Section 6.5, Sample Transport Velocity.
8
5.1 Components .1 Components
5.1.1 BVS4300 Sampler Components 5.1.1 BVS4300 Sampler Components
63.0”
(1600 mm)
CVS4200 / BVS4300 Stationary Samplers
FIGURE 5-1. Diagrams of the BVS4300 basic unit
9
CVS4200 / BVS4300 Stationary Samplers
TABLE 5-1. BVS4300 Component Descriptions
Number Item Description
1 Intake Hose Connection The volume control tube is where the intake hose is connected to
the sampler. This stainless steel tube is raised or lowered
manually using fitting to set the sample volume (see FIGURE
5-3).
2 Multi-Function Input Controller This is where sampler is controlled and programmed.
3 Signal Lights and Control
Switch
The optional top light (green) indicates sampler is running. The
second light (red) indicates reverse polarity if external battery is
being used. The toggle switch turns on/off the controller while
leaving power to the sampler.
4 Metering Chamber This chamber is where the sample liquid is drawn into before
dropping into the final container. The rods inside are raised and
lowered to the sample volume desired.
5 Pinch Valve This valve shuts during sampling, and then releases once desired
liquid has entered the chamber.
6 Instrument Tray Rollers Control section of sampler can be easily rolled out for wiring and
maintenance.
7 Breaker Switches All samplers have an on/off switch. Other options for switches
include fridge and heater.
8 Discharge Tube The sample liquid is released via the pinch valve to the sample
container(s) below. With composite (single container) units the
amount of built-up pressure may cause discharge tube to come
out of the container, so it is advisable to fasten it using the
provided lid.
9 Container Lid The special lid provided fastens the discharge tube to the sample
container. Weight prevents tube dislocation.
10 Sample Container(s) The container(s) that the sample is deposited in can be made
from a variety of materials, shapes, and sizes. In discrete
samplers, there is a distributor arm that deposits samples into
multiple containers.
11 Cabinet Circulation Fan Optional fan for hot weather climates, prolongs the life of
refrigerator. If no fan is present, this space will be solid.
12 Louvers Vents for ensuring proper ventilation in cabinet.
13 Pump Exhaust Connection If the sample fluid is corrosive, the pump exhaust air can be sent
to a separate location through this connector; unnecessary in
most conditions.
14 Instrument Air Connection In corrosive environments, instrument air can be brought in from
another source, prolonging the life of the instrumentation
components. Tubing would be hooked up to the provided
adapter. This is unnecessary in most environments.
15 Instrument Panel Instrumentation is mounted on this panel.
16 Instrumentation Section All instrumentation and wiring, including pump, are located in
this section of the sampler, protected from outside elements.
17 Field Wiring Terminals Terminal block for field wiring is located on the back of the
instrument tray
18 Instrument Tray This tray can be rolled out by unscrewing the four bolts at the top
of the panel, and gliding it out on the rollers.
19 Enclosure Cabinet for entire sampler is powder-coated steel or optional
stainless steel.
20 Mounting Feet Brackets have holes for screwing sampler into a fixed location.
21 Installation Holes Put bolts through these holes into a solid surface to stabilize
sampler.
10
5.1.2 CVS4200 Sampler Components
CVS4200 / BVS4300 Stationary Samplers
FIGURE 5-2. Diagrams of the CVS4200 basic unit
11
CVS4200 / BVS4300 Stationary Samplers
TABLE 5-2. CVS4200 Sampler Component Descriptions
Number Item Description
1 Intake Hose Connection
The volume control tube is where the intake hose is connected to
the sampler. This stainless steel tube is raised or lowered
manually using fitting to set the sample volume (see FIGURE
5-3).
2 Multi-Function Input Controller This is where sampler is controlled and programmed.
3
Signal Lights and Control
Switch
The optional top light (green) indicates sampler is running. The
second light (red) indicates reverse polarity if external battery is
being used. The toggle switch turns on/off the controller while
leaving power to the sampler.
4 Metering Chamber
This chamber is where the sample liquid is drawn into before
dropping into the final container. The rods inside are raised and
lowered to the sample volume desired.
5 Pinch Valve
This valve shuts during sampling, and then releases once desired
liquid has entered the chamber.
6 Breaker Switches
All samplers have an on/off switch. Other option for switch is for
fridge.
7 Discharge Tube
The sample liquid is released via the pinch valve to the sample
container(s) below. With composite (single container) units the
amount of built-up pressure may cause discharge tube to come
out of the container, so it is advisable to fasten it using the
provided lid.
8 Container Lid
The special lid provided fastens the discharge tube to the sample
container. Weight prevents tube dislocation.
9 Sample Container
The container that the sample is deposited into can be made from
a variety of materials, shapes, and sizes. Standard bottles are 2 or
5 gallon high density polyethylene (HDPE).
10 Instrumentation Section
All instrumentation and wiring, including pump, are located in
this section of the sampler, protected from outside elements.
11 Field Wiring Terminals
Terminal block for field wiring is located on the back of the
instrument tray
12 Refrigerator – Small Composite samplers have a smaller refrigerator by default.
13 Pressure Gauge
Optional pressure gauge is useful for monitoring
vacuum/pressure status, i.e. for checking plugged lines and
discovering leaks.
14 Stepper Motor and Bracket
Installed directly onto roof of refrigerator, this bracket is lined up
to deliver samples uniformly to multiple bottles. The stepper
moves the distributor arm after sampling the previous bottle.
15 Distributor Arm Stainless steel arm delivers liquid samples to the discrete bottles.
16 Discrete Bottles
Diagram shows 24 wedge bottle arrangement. Any arrangement
of bottles is possible that is factors of 24 and fits inside the
limited space (for example, 2 x 2 gallon containers).
17 Removable Bottle Tray
Some arrangements include a removable tray with handles for
easy swapping of bottles (24 bottle and 8 bottle options only).
18 Bottle Seating Template
With removable bottle tray, a circular guide and bolt lock holds
tray in its precise location. With other bottle arrangements, the
template includes seating guides for each bottle individually.
19 Refrigerator - Large
Discrete samplers have a large glass-door refrigerator with digital
thermostat display.
12
CVS4200 / BVS4300 Stationary Samplers
5.1.3 Sampler Vacuum System Components
FIGURE 5-3. Diagram of the CVS/BVS vacuum system
13
CVS4200 / BVS4300 Stationary Samplers
TABLE 5-3. Vacuum System Component Descriptions
Number Item Description
1 Solenoid Valves Control the air flow from pump to sampler, either purging or
sucking.
2 Pump Located behind a sheet of metal, the pump does not come into
contact with any liquid whatsoever. It does all the drawing and
purging through using a vacuum and compressor.
3 Touchpad Controller Controls sampler program and offers status feedback on LCD.
4 Sample Distributor Rotates distributor arm between multiple discrete containers.
5 Distributor Arm Dispenses liquid from metering chamber into discrete container.
6 Discrete Sample Containers Multiple containers. Any arrangement of bottles is possible that
is factors of 24 and fits inside the 5 ft
3
refrigeration unit.
7 Pressure Gauge Visually describes sampling process in terms of
vacuum/pressure. Useful for troubleshooting a plugged/kinked
line, or signals leaks. Optional.
8 Liquid Sensing Rod This rod must remain above the volume control tube. When the
sample liquid comes into contact with the two rods, it signals
the controller to stop sampling and begin purging.
9 Barrier Valve Prevents metering chamber overflow in case the liquid sensing
rod fails (for example, completely coated with oils/grease).
10 Volume Control Tube Mechanically set the volume required for sample by using a
wrench on the fitting at the base of this stainless steel tube.
11 Metering Chamber Sample is drawn into chamber up to level set by volume control
tube, then line is purged, followed by dropping sample into
containers. Metering Chambers come in glass or acrylic, from
250 cc to 1,000 cc.
12 Pinch Valve This valve shuts during sampling, then opens during sampling to
drop sample into container, then closes to purge hose.
13 Cap with “Container Full” Shut-
off
Optional cap contains Overflow Protection Probes which signal
the sampler to halt when container is full. Can be installed in
maximum two containers, or into a discrete bottle tray.
14 Composite Sample Container A single container to hold sample liquid. Can be used with
smaller refrigerator.
15 Intake Hose Standard samplers come with 7.6 m (25 ft) of 3/8 inch ID PVC
tube.
16 Sinker. Optional Strainer. Keeps the end of the intake tube in the source liquid. Optional
strainer can raise collection point above sinker.
14
5.2 Sample Container Options
TABLE 5-4. Sample Container Options
Feature Description
CVS4200 / BVS4300 Stationary Samplers
Composite (single)
containers
Discrete (multiple)
containers
9 liter (2.3 US gallon) Nalgene
9 liter (2.3 US gallon) Nalgene with overflow
20 liter (5 US gallon) Nalgene
20 liter (5 US gallon) Nalgene with overflow
10 liter (2.5 US gallon) Glass
10 liter (2.5 US gallon) Glass with overflow
0.5 liter Plastic [24 bottles]
1 liter Glass [12 bottles]
2 liter Glass [8 bottles]
4 liter Glass [4 bottles]
10 liter (2.5 US gallon) Glass [with and without
overflow]
9 liter (2.3 US gallon) Nalgene
9 liter (2.3 US gallon) Nalgene with overflow
20 liter (5 US gallon) Nalgene
20 liter (5 US gallon) Nalgene with overflow
5.3 Discrete and Composite Overview
5.3.1 Discrete Sampling
Discrete sampling is sampling wherein samples are taken into more than one
container. Inside of the refrigerator (or cooling chamber on portable sampler
units) is a stepper assembly which revolves 360° and delivers samples into
separate containers, ranging from 2 to 24 bottles. Discrete sampling is
beneficial in situations where change over time needs to be measured, such as
measuring different water characteristics over 24 hours. Labs and monitoring
personnel tend to rely on discrete portable sampling.
15
CVS4200 / BVS4300 Stationary Samplers
FIGURE 5-4. Discrete removable bottle tray (24 bottles)
5.3.2 Composite Sampling
Composite sampling is for drawing water samples into one large container.
This is the simplest way of taking samples and typical for most situations
where a sampler is set up to measure effluent in one location. It is also
significantly less expensive than discrete sampling.
16
FIGURE 5-5. Composite two gallon bottle with lid
5.4 Sinker / Strainer
The intake hose includes either a lead sinker or stainless-steel sinker/strainer.
The sinker or sinker/strainer is intended to keep the sample line fully
submerged in the source liquid. The stainless-steel sinker/strainer should be
used in samples with material that may clog up a normal sinker, or where the
standard sinker could stir up bottom sediment.
FIGURE 5-6. Lead sinker
CVS4200 / BVS4300 Stationary Samplers
FIGURE 5-7. Stainless-steel sinker/strainer
5.5 Special Systems
5.5.1 5/8 in. Systems
In applications with large particles or materials in the source liquid, a 5/8 in. ID
system will help prevent clogging. The added diameter adds 66% more
volume to the entire system.
For a sampler to increase to a 5/8 in. ID, the following parts and components
are changed to allow for more volume: intake tube, volume control tube, all
fittings, metering chamber, metering chamber lid, discharge tube, sample
container cover, and sinker or strainer. The 5/8 in. system is only offered for
our composite samplers.
5.5.2 Sanitary Systems – Teflon and Glass
In applications wherein the water sample must be prevented from coming into
contact with any plastics, a sanitary system is recommended. For example,
when testing for acid/base/neutral extractable organics and pesticides, the
sanitary system will keep the final sample clean from any contaminants.
The sanitary system includes changing all “wetted” components of the
sampling system (that is, everything that comes in contact with the final
17
CVS4200 / BVS4300 Stationary Samplers
sample). TABLE 5-5 outlines the key changes made to the sampler for a
sanitary system.
Component Standard Material Sanitary System Material
Intake Tube PVC Teflon-Lined PVC
Sinker/Strainer Lead Sinker Stainless Steel Sinker/Strainer
Fittings Brass Stainless Steel
Metering Chamber Acrylic Pyrex
Metering Chamber Cover Delrin Teflon with Steel Bracing Ring
Discharge Tube Latex Silicone
Sample Container(s) HDPE (or polypropylene (PP)) Glass
O-Rings Buna-N (or Viton) Silicone
5.5.3 Pressurized Source
Special care must be taken in applications with back pressure so that the
sampler does not become flooded. Options for pressurized situations include:
1. Relocate the sampler. Although it may be located farther from the
source, the CVS/BVS vacuum system is able to handle long draws and can
be moved to a location (higher) where back-pressure is not an issue.
2. Looping the intake tube. For small amounts of pressure, looping the
intake tube up to a height that the water pressure cannot push above is a
simple way of getting around the issue. The maximum height would be
the maximum vertical draw, 3.4 m (27.5 ft).
TABLE 5-5. Sanitary System Changes
NOTE
We recommend using a valve with external valve control in this
kind of situation, to be on the same side. See FIGURE 5-8.
FIGURE 5-8. Vertical loop for pressurized source
18
CVS4200 / BVS4300 Stationary Samplers
3. Flow-Through Chamber. Divert liquid from the pressurized line to a
“wet well” or secondary pool, and attach this component to it, as shown in
FIGURE 5-9.
4. Configuring a Combination of Valves. Using a combination of valves,
such as pressure reducing valves and ball valves, previous customers have
successfully managed to take samples under a certain amount of pressure
without flooding the system.
FLOW-THROUGH CHAMBER
MUST BE INSTALLED BELOW
ELEVATION OF METERING
CHAMBER TO AVOID
FLOODING OF SAMPLER.
FIGURE 5-9. Flow-through chamber for pressurized source
19
CVS4200 / BVS4300 Stationary Samplers
6. Specifications
Features:
• Rapid transport velocities of samples (horizontal draws 76.2 m (250
ft) at 0.8 m s
solids.
• All information is easily controlled and viewable on a 2 by 16
character backlit LCD.
• Vacuum technology benefits over peristaltic pump samplers:
o Accurate sample volumes,
o Rapid transport velocities mean more-representative samples,
o Less disturbance of sample,
o Minimal wear on the tubing, resulting in less-frequent
maintenance,
o Reduced cross-sample contamination.
Compatible Dataloggers: CR200(X)-series
CR800 series
CR1000
CR3000
CR5000
CR9000X
CR510
CR10(X)
CR23X
CR7
21X
–1
(2.5 ft s–1), meaning more accurate samples, even of
20
Loading...