Xylem WS700 User Manual

Global Water

800-876-1172 • globalw.com

Global Water

Instrumentation, Inc.

151 Graham Road

P. O. Box 9010

College Station, TX 77842-9010

T: 800-876-1172

Int’l: [phone], F: [phone]

E-mail : [e-mail]

WS700 Sampler

01-455
Publication N umber 38550512

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Table of Contents

I. WS700 Checklist • • • • • Page 3
II. Inspection • • • • • • 3
III. Description • • • • • • • 4
IV. Installing the Water Sampler • • • • 5
V. Installing the Pickup Hose • • • • • 5
VI. The Control Panel • • • • • • 6
VII. Composite Sampling • • • • • 8
VIII. Discrete Sampling • • • • • • 8
IX. External Trigger mode • • • • • 9
X. Specifications • • • • • • 11
XI. Maintenance • • • • • • 12
XII. Troubleshooting • • • • • • 13
XIII. Warranty • • • • • • • 14
XIV. Appendix A: Sample Size vs. Head Height • • • 15
XV. Appendix B: Battery Life • • • • 16
XVI. Appendix C: Input and Output Connection • • • 16
XVII. Appendix D: Accessories • • • • • 17

* Copyright  Global Water Instrumentation, I nc. 2012

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Congratulations on your purchase of the Global Water WS700
Water Sampler. This instrument has been quality tested and approved for
accurate and reliable operation. We are confident that you will find the
WS700 to be a valuable asset for your applications. Should you require
assistance, our technical st aff will be happy to help.

I. WS700 Checklist

a. WS700 Water Sampler
b. 12V Battery (Inside Enclosure)
c. Bat tery Cable
d. Battery Charger
e. Two Shorting Plugs
f. WS700 Manual

II. Inspection

The WS700 unit was carefully inspected and cer tified by Global Water’s Quality Assurance Team before shipping. If any damage has occurred during shipping, please notify Global Water Ins trum entation, Inc. and file a claim with the carrier involved.

Use the checklist to ensure that ever y thing needed to operate the WS700 was
received.

III. Description

The Global Water WS700 Sampler is designed s pec ifically to meet a wide variety
of sampling requirements including industrial discharge, process contr ol, wat er
and wastewater treatment plants, sewers, rivers and streams.

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The WS700 Sampler can take individual “time weighted” composite samples, or it
can be set to take a full-bottle discrete or “Gr ab” sam ple. This is accomplished
with a Sample Size control having one position being res er v ed for “Full” bottle. A
Sample Interval control sets the time between individual composite samples and
has a provision for allowing the sampler to be triggered from external sources.

A Start Delay timer can be set to start sampling after a preset time. This allows
multiple samplers to be deployed in the field and have them turn on at the same
time. The delay can also be used to hold off sampling to let the water source
flush out debris or other contaminants .

After each sample, the pump will reverse for 15 s ec onds . This clears any debris
from the strainer at the end of the pickup hose and also em pties water from the
hose so the next sample is not contaminat ed by the pr ev ious one.

Inputs are provided for triggering the sam pler based on water level, a rain gauge
sensor or a signal from an external process controller or other monitoring device.
An output is also available for monitoring when the pump is taking samples, using
a data logger or similar recording device.

The WS700 Sampler is easily set up near industr ial dis c har ges or s treams. It
can also be suspended in a manhole for sewer flow sampling. The sampler
consists of a rugged, rainproof and lockable c arrying enclosure. The enclosure
houses a peristaltic sampling pump, s am ple bottle, a control panel, and a
rechargeable battery. A battery c har ger and s ample pickup hos es are also
provided.

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IV. Installing the Water Sampler

a. The sampler should be placed upright (it will no t work if placed on its back or

side).

b. Open the sampler and remove the battery charger from the unit. Store the

charger for later use.

c. To s ec ur e the sample bottle:

1. Screw the bottle cap/float swit c h onto the sample bottle

2. Place the bottle into the sampler enclos ur e

3. Insert the end of the peristaltic pum p’s hose in the hole at the top of the
bottle cap

4. Plug the float switch lead into the jack on t he front of the control panel

d. The sampling unit can be secured from vandalis m and s trong winds by one of

the following methods:

1. Mount unit on post and lock closed

2. Lock closed and chain handles to a solid str uc ture ( s uc h as a tree, post, or
building)

3. Enclose and lock unit in a steel electrical box

e. Avoid drilling holes in the enclosure if poss ible. If holes must be drilled in the

enclosure avoid drilling through t he c ontrol panel enclosure. Any holes drilled
through the enclosure must be sealed wit h s ome ty pe of silic one glue to
prevent water from entering the case and causing equipm ent failure.

f. The unit is water resistant, not water proof. The unit must be located well

above the expected water level to cont inue to provide reliable service.

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V. Installing the Pickup Hose

The pickup hose should be installed in a wastewater discharge channel or stream. The
pickup strainer should be submerged under water and should be situated to avoid
contact with the channel bottom.

VI. The Control Panel

1. Pump.

2. Start Delay: This setting delays sampling by a pres et amount of
time. If no delay is desired, set the control to zero. Only the first
sample taken by the pump is delayed, except as described later in
the section titled “External Trigger Mode”.

3. Sample Interval: Sets the time interval between composite samples.
The “External Trigger” position is res er v ed for using the Trigger and
Rain Sensor inputs to initiate sampling as des c r ibed later in the
section titled “External Trigger M ode”.

4. Sample Size: Sets the size for a single compos ite sample. The
sample size settings are approximate and apply to a head height of
four feet. The switch position marked “Full” caus es the pump to work

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as a discrete sampler, filling the bottle full in one sample. Note: In
the Full position, the sampler will shut of f the pump after one hour,
even if the bottle is not full.

5. Trigger In: This input works in “External Trigger” mode only, as
selected by the Sample Interval contr ol. A signal from an external
device will cause a single sample to be t ak en according to the Size
control. The External Trigger mode is descr ibed in more detail later
in the section titled “External Trigger Mode”. Refer to the
Specifications section for details about the input pulse requirements.

6. Pulse Out: This output sends a pulse to an optional recor ding or
monitoring device each time the pum p st ar ts, allowing the time of the
sample event to be recorded. Refer to the Specific ations section for
details about the output pulse.

7. Status: This red LED indicates the s tatus of the sampler. While the
sampler is waiting to be triggered, t he light remains off. Once
triggered, the LED will blink once every two seconds while the Delay
or Interval timers are running and while the pump is operating. The
LED remains lit constantly when the sample bott le is full or if the
bottle switch is not plugged in.

8. Power: This turns the power to the sampler on and off. Turning the
switch off for one second resets all functions and timers.

9. Battery: Connect the battery here us ing the supplied battery cable.

10. Water Sensor: When an optional water sensor is plugged into this
jack, sampling will not begin until the presence of water is detected
(the Rain Sensor must also detect wat er ) . If this s ens or input is not
being used, plug one of the two short ing plugs supplie d with the
sampler into this jack. This input has no aff ect when tr igger ing the
sampler using the Trigger Input in External Trigger mode.

11. Rain Sensor: When an optional water sensor is plugged int o this
jack, sampling will not begin until the presence of water is detected,
usually in a rain gauge (the Water Sensor m us t also detect water). If
this sensor input is not being used, plug one of the two shorting
plugs supplied with the sampler into t his jac k . This input has no
affect when triggering the sampler using t he Trigger Input in External
Trigger mode. This input can also be used to take individual

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composite samples and is described in detail lat er in the section
titled “External Trigger Mode”.

12. Bottle Switch: The sample bottle float switch plugs into the c ontrol
panel here. For sampling to occur a float s witch must be plugged in
and the bottle must not be full. If the Status LED rem ains lit all the
time, check this connection.

13. Test Pump: Pressing this button tests the operation of the pump.
This button will run the pump regardless of whether the bottle switch
is plugged in or not. The pump runs forward for as long as the
button is held down, then reverses f or an equal amount of time or 15
seconds, which ever is less.

VII. Composite Sampling

A composite sample is a series of smaller s amples put into the same bottle, thus showing
an “average” sample over time. Set the Interval control to the desired time between
samples (do not select the External T r igger pos ition). Set the Size control to the desired
sample size. Note that the sample size set tings are approximate and apply to a head height
of four feet. For heights other than four feet , refer to the chart inside the front of the
sampler.

The sampler starts timing when both of the optional Rain and Water Sensor s detect
moisture. If you do not have the optional water sensor s or do not need them for your
application, defeat them by plugging one of the two shorting plugs supplied with the s am pler
into their jack. If both inputs are defeated, the sampler starts up triggered when the power
switch is turned on. The Status LED starts blinking ever y 2 s ec onds onc e the sampler is
triggered.

The Start Delay tim er begins running when the sampler is triggered by the Rain and W ater
Sensors and the first sample is taken when the timer ex pir es . If the Delay control is set to
zero, sampling begins immediately . The delay timer only applies to the first sample taken,
except as described later in the section titled “External Trigger Mode”. At the end of eac h
sample, the pump reverses for 15 seconds .

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Sampling continues as Trigger-Delay-Sample-Reverse-Interval-Sample-Reverse-Interval­Sample-Reverse … until the sample bot tle is full. When the bottle is full, the Status LED
remains lit constantly.

VIII. Discrete Sampling

A discrete sample is a single sample put into the s ame bottle, thus being a sample at one
point in time. Set the Sample Size control to “Full”. Once started, the pump will continue to
run until the sample bottle if full.

As with composite sampling, the Start Delay timer begins when the sampler is trigger by the
Rain and Water Sensors and the first sample is tak en when the timer expires. If the Delay
control is set to zero, sampling begins immediately. The Status LED blinks every 2 s ec onds
while the delay timer or the pump is running and remains lit constantly once the sample
bottle has been filled. At the end of sampling, the pump reverses for 15 seconds.

IX. External Trigger Mode

When the Sample Interval control is s et to the “External Trigger” position, the s am pler c an
be triggered externally by either the Trigger In jack or the Rain Sensor input. This mode is
useful in applications where sampling occur s bas ed on r eadings from a process controller,
SCADA system, flow monitor, auto-dumping r ain gauge or other remote monitoring devices.

Using the Rain Sensor as a trigger source:
This mode is normally used with an auto-dumping rain gauge that empties itself every 24
hours. Set the Sample Interval control to External Trigger. Set each pumps Size control
based on desired composite sample size or s et t o Full f or a dis c r ete sample.

The sampler will be triggered when both the Rain and W ater Sensors detect moisture. If the
Water Sensor is not needed, use one of the shorting plugs supplied with the sampler to
defeat it by plugging it into the Water S ens or input jack . Place the Rain Sensor at the
desired height in the rain gauge. When t he Rain Sensor detects moisture, the sampler will
start.

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Once triggered by the Rain Sensor, the Start Delay timer begins running and the Status
LED begins blinking every 2 seconds. When the tim er ex pir es , the pump takes a sample
based on the Sample Size settings. When the sample is complete, the pump reverses for
15 seconds, then stops. The sampler cannot be re-triggered until the rain gauge empties
itself and the Rain Sensor goes dry. The next t ime t he s ens or detects moisture, the Start
Delay timer will start over again and another sample will be taken when it expires.

If the pump’s Sample Size control is s et t o take a full-bot tle discrete sample, further triggers
will have no affect. If the pump is set to take composite samples, each one will represent
the conditions at the time of that “qualifi ed r ain ev ent”. This process will continue until the
sample bottle is full and the Status LED remains lit all the time.

Using the Trigger Input as a source:
This input is generally used for connecting to a flow monitor, processor controller, or other
external monitoring device.

When using the Trigger In input jack, leave the Rain Sensor input jack disc onnec ted.
Upon being triggered by the Trigger Input, the Start Delay timer begins running. When the

delay timer has expired, the pump t ak es a sample based on the Sample Size s etting.
Holding the Trigger Input active past the end of the sample will cause the pump to continue
until the Trigger Input is released. When the sample is complet e, the pump reverses, then
stops.

Flow Proportional Sampling

a. To set the WS700 up to take flow propor tional samples, a flow monitor must

be attached to the control panel. In t his c onfiguration, the sampler is
designed to take a sample every time a specific amount of flow has passed
through the flow monitor.

b. The flow monitor must provide a momentary s witch c los ur e (250ms or longer)

or a pulse of 4-30VDC, whenever a sample is to be taken. The output of the
flow monitor must be wired to a 2-wire RCA jack as show n in A ppendix C.
The phone plug is then inserted into the Tr igger In jack on the control panel.

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c. Set the Sample Interval knob to Ex ternal Trigger mode and the Sample Size

knob to the desired sample size. The sample will be taken, flow
proportionally, as directed by the flow meter.

X. Specifications

Operating Temperature: 0° to +70°C
Size of unit: 22”H X 17"W X 9"D
Weight: 20lb (Shipping Weight 22lb)
Materials:

Enclosure: Expanded UV protected PVC
Bottle: 2 gallon Polyethylene
Pickup Hose: 15' nylon reinforced 1/4" ID polyethylene

Pump Tubing: Neoprene 1/4" ID, 7/16” OD

Sample Pump:

Flow Rate: 1000 ml per minute at a 4 foot head
Type: Peristaltic

Maximum Lift: ~20 feet
Battery: Rechargeable 5 AH Gel Cell
Battery Life: ~1 hour, continuous pumping under load
Standby: 3 months while still retaining

Start Delay: 16 time settings from 0 to 12 hours
Composite Interval: 15 time settings from 5 min. to 12 hours

Sample Size: 15 composite sample sizes from 50ml to

External Trigger Input: 250mS minimum pulse width
Pulse Output: 5VDC one-second pulse

1000ohm output impedance

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flexible tubing section with int ak e s trainer

enough power to run the pump to capacity

plus an External Trigger mode sett ing
2 liters plus a Full Bottle discrete setting

(Approximate sizes at 4 foot head)
Switch closure or 4-30VDC

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Bottle Switch Input: Switch clos ur e Input
Floating read switch in bottle
Rain and Water Sensors: Optional moisture sensors or switch

Internal Fuse: 10A Slow-Blow

XI. Maintenance

Sampler

a. The Global Water WS700 Water Sampler requires minimal maintenance.

The sampler enclosure is rainproof and rugged. A v oid ex pos ur e to extremely
rough usage. Routinely wipe the carry ing c as e and contr ol panel face, rinse
the pickup hose and debris strainer, and wash the sample bottle with mild
soap and warm water. Additional plastic and glass sample bottles, neoprene
tubing for the sampler pump, bottle caps /f loat switches, removable debris
strainers, and pickup hose can be purchased from Global Water (see
Appendix C section).

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closure inputs

Battery

b. If the pump runs s lowly , t his is an indic ation that the battery requires

recharging. Global Water recommends fully recharging batteries
approximately once per month. In addition, the battery should be recharged
before any extended use. NOTE: The battery life will last longer if recharged
before it drains below 10.5 volts.

c. To recharge the battery, disconnect the battery cable from t he battery.

Remove the battery from the
enclosure. Attach the battery
charger’s spade lugs to the
battery terminals, red lug to red
terminal, and blue lug to black
terminal. Plug the charger into
a wall socket. A full recharge
will take about 12 hours.
Charging more than 24 hours
may shorten the battery life.

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Additional batteries and batt er y c har ger s ar e availabl e from Global Water
(see Appendix C section).

XII. Troubleshooting

a. Check that the battery is firmly connect ed to the control panel and confirm

that it is fully charged.

b. Press the Pump Test button on the front panel. The test button should

always run the pump, regardless of the s tate of any of the inputs.

c. Tur n the power switch off for 1-2 seconds then back on to reset the sampler.
d. Check the Status LED on the front panel.

i. The LE D is off: If the water sensors are being used, check the Rain

and Water Sensor inputs. Sensors must be in contact with moisture

and unused inputs must have one of the shorting plugs supplied with

the sampler plugged into the jack. If the Trigger Input is being used,

confirm that External Trigger mode is s elec ted on the Interval control.

Check the pulses coming from the triggering device and c onfirm they

meet specifications. Test the Trigger Input by plugging one of the

shorting plugs supplied with the sampler into the jack.

ii. The LE D is blinking: Check the Start Delay and Interval settings . The

sampler may be waiting for the Delay timer to run out or it may be

timing the interval between composite samples.

iii. The LE D is on c ons tantly: Check the bottle switch. The light remains

on when either the sample bottle is full or when the float switch is not

plugged in or working properly. Plug one of t he short ing plugs

supplied with the sampler into the bottle switch jack, the light should go

out or start blinking.

Other issues
e. Call us for tech support: 800-876-1172 or [phone] ( many problems

can be solved over the phone). Fax: [phone] or Email:

[e-mail].

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Be prepared to describe the problem being experienced inc luding specific
details of the application and installation and any additional pertinent
information.

f. In the event that the equipment needs to be returned to the factory f or any

reason, please call to obtain a RMA # (Retur n Material Authorization). Do not
return items without a RMA # on the outside of the package. Decontaminate
the WS700 prior to returning.

Include a written statement describing the problems.
Send the package with shipping prepaid to G lobal Water’s factory address.

Insure the shipment, as the warranty does not cover damage incurred during
transit.

g. When calling for tech support, please have t he following information ready;

1. Model #.

2. Unit serial number.

3. P.O.# the equipment was purchased on.

4. Global Water’s sales number or the invoice num ber .

5. Repair instructions and/or specif ic pr oblems relating to the product.

XIII. Warranty

a. Global Water Instrumentation, Inc. warrants that its products are free from

defects in material and workmanship under normal use and service for a
period of one year from date of shipment from factory. Global Water’s
obligations under this warranty ar e lim ited to, at Global Water’s option: (I)
replacing or (II) repairing; any produc ts determined to be defective. In no
case shall Global Water’s liability exceed t he pr oduc ts original purchase price.
This warranty does not apply to any equipment that has been repaired or
altered, except by Global Water Inst r um entation, Inc., or which has been
subject to misuse, negligence or accident. It is expressly agreed that this
warranty will be in lieu of all warranties of fitness and in lieu of the warranty of
merchantability.

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Actual Sample Size vs. Sample S ize Control for Various He a d He ights

0

200

400

600

800

1000

1200

1400

1600

1800

2000

0 250 500 750 1000 1250 1500 1750 2000 2250

Actual Sample Size (ml)

Sample Size Control Setting (ml)

14 Feet

2 Feet

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b. The warranty begins on the date of the product’s invoice.

Appendix A: Sample Size Calibration

Use the following graph to see how sample s iz e changes wit h head height. The Sample
Size controls on the control panel are calibrated at a height of 4 feet. Increasing the head
height decreases the sample size by a predictable amount. To determine the appropriate
Sample Size setting for a desired volume; find the sample size on the horizontal axis, follow
straight up to the line corresponding to your head height, then look across to the vert ic al
axis and read the setting for the Size control on the control panel.

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Appendix B: Battery Life

While battery life depends on several f ac tors such as charge, condition and temperat ur e; it
can generally be assumed that the s am pler c an deployed in the field for more than 3
months waiting to be triggered, while still r etaining enough charge to run the pump for one
hour, or about 10 gallons.

Appendix C: Input and Output Connection

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Appendix D: Accessories

Part Description

Part Number

Unit

12V 5Ah Battery

00-010

Each

Battery Charger

FE0400

Each

1 Gal Glass Sample Bottle

00-835

Each

2.5 Gal Plastic Sample Bottle

00-419

Each

Bottle Cap/Float Switch

CB0200

Each

Pickup Hose

00-546

Feet

Pickup Stra iner

CA0300

Each

Pump tubing

00-744

Feet

Rain and Water Sensors

CA0400

Each

Auto-Drain Rain Gauge

CH0000

Each

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