globalwater WS700R User manual

Global Water
800-876-1172 •globalw.com
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WS700R Refrigerated Wastewater Sampler
Global Water
Instrumentation, Inc.
151 Graham Road
P.O. Box 9010
College Station, TX 77842-9010
T: 800-876-1172
Int’l: [phone], Fax: [phone]
E-mail : [e-mail]
01-533
Publication Number 38910512

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Table of Contents
I. WS700R Checklist ••••3
II. Inspection ••••••3
III. Description ••••••4
IV. Installing the Water Sampler ••••5
V. The Control Panel •••••6
VI. The Refrigerator •••••8
VII. Composite Sampling •••••8
VIII. Discrete Sampling •••••9
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, Inc. 2012

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Congratulations on your purchase of the Global Water WS700R Refrigerated
WastewaterSampler. This instrumenthas been quality tested and approved
for accurate and reliable operation. We are confident that you will find the
WS700R to be a valuable asset for your applications. Should you require
assistance, our technical staff will be happy to help.
I. WS700R Checklist
a. WS700R Wastewater Sampler Controller
b. 12V Battery (Inside sampler housing)
c. Battery Charger
d. Two Shorting Plugs
e. WS700R Manual
f. Refrigerator
g. Sample Bottle (inside refrigerator)
h. RCA to RCA float switch lead
II. Inspection
The WS700R unit was carefully inspected and certified by Global Water’s Quality
Assurance Team before shipping. If any damage has occurred during shipping,
please notify Global Water Instrumentation, Inc. and file a claim with the carrier
involved.
Use the checklist to ensure that everything needed to operate the WS700R was
received.

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III. Description
The Global Water WS700R Sampler is designed specifically to meet a wide
variety of sampling requirements where refrigeration is required; including
industrial discharge, process control, water and wastewater treatment plants,
sewers, rivers and streams.
The WS700R Sampler can take individual “time weighted” composite samples, or
it can be set to take a full-bottle discrete or “Grab” sample. This is accomplished
with a Sample Size control having one position being reserved 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 seconds. This clears any debris
from the strainer at the end of the pickup hose and also empties water from the
hose so the next sample is not contaminated by the previous one.
Inputs are provided for triggering the sampler 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 WS700R Sampler is easily set up near industrial discharges or streams. It
can also be suspended in a manhole for sewer flow sampling. The sampler
consists of a rugged, rainproof and lockable carrying enclosure. The enclosure
houses a peristaltic sampling pump, sample bottle, a control panel, and a
rechargeable battery. A battery charger and sample pickup hoses are also
provided.

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IV. Installing the Water Sampler
Refrigerator
a. The refrigerator is designed for freestanding installation only. It should not be
recessed or built in. Install the refrigerator on a base strong enough to
support it when fully loaded. Allow air to circulate freely around the
refrigerator. Provide a 1” clearance around the unit for proper circulation.
b. In the event of an electrical short circuit, grounding reduces the risk of electric
shock by providing an escape wire for the electric current. This appliance is
equipped with a cord having a grounding wire with a grounding plug. Do not
cut or remove the third (ground) prong from the power cord. Plug the
refrigerator cord into a wall outlet to start the cooling cycle. Set the
temperature knob to 4.
c. Never put food or beverages into the refrigerated wastewater sampler, it may
become contaminated.
Sampler
a. The control panel should be placed upright.
b. To secure the sample bottle:
1) Screw the bottle caps/float switch onto the sample bottle
2) Place bottle into the refrigerator
3) Plug the float switch into the jack located on the inside at t he
top left
4) Insert the sampler hose into the hole in the lid
c. Fasten the pump control panel enclosure down to the refrigerator by peeling
off the back from the adhesive fasteners. Press the control panel enclosure
firmly down so that it is not easily knocked loose.
d. Connect the depositing end of the pump hose to fitting at the top of the
refrigerator.
e. Plug the float switch lead between the bottle switch jack on the front of the
control panel and the jack at the top of the refrigerator.
f. Plug the AC power supply plug into the jack on the front of the control panel
and plug the power supply into the wall outlet. Unplug the power supply when
not in use.
g. The unit is water resistant, not water proof. The unit must be located well
above the water level to continue to provide reliable service.

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V. The Control Panel
1. Pump.
2. Start Delay: This setting delays sampling by a preset 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 reserved for using the Trigger and
Rain Sensor inputs to initiate sampling as described later in the
section titled “External Trigger Mode”.
4. Sample Size: Sets the size for a single composite sample. The
sample size settings are approximate and apply to a head height of
four feet. The switch position marked “Full” causes the pump to work
as a discrete sampler, filling the bottle full in one sample. Note: In
the Full position, the sampler will shut off 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 control. A signal from an external
device will cause a single sample to be taken according to the Size
control. The External Trigger mode is described in more detail later
in the section titled “External Trigger Mode”. Refer to the
Specifications section for details about the input pulse requirements.

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6. Pulse Out: This output sends a pulse to an optional recording or
monitoring device each time the pump starts, allowing the time of the
sample event to be recorded. Refer to the Specifications section for
details about the output pulse.
7. Status:This red LED indicates the status of the sampler. While the
sampler is waiting to be triggered, the 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 bottle 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. Charger:Connect the battery charger here.
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 water). If this sensor input is not
being used, plug one of the two shorting plugs supplied with the
sampler into this jack. This input has no affect when triggering the
sampler using the Trigger Input in External Trigger mode.
11.Rain Sensor: When an optional water sensor is plugged into this
jack, sampling will not begin until the presence of water is detected,
usually in a rain gauge (the Water Sensor must also detect water). If
this sensor input is not being used, plug one of the two shorting
plugs supplied with the sampler into this jack. This input has no
affect when triggering the sampler using the Trigger Input in External
Trigger mode. This input can also be used to take individual
composite samples and is described in detail later in the section
titled “External Trigger Mode”.
12.Bottle Switch:The sample bottle float switch plugs into the control
panel here. For sampling to occur a float switch must be plugged in
and the bottle must not be full. If the Status LED remains 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 for an equal amount of time or 15
seconds, which ever is less.

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VI. The Refrigerator
a. The temperature control dial has settings from 1 to 7 plus OFF. 1 is the
warmest and 7 is the coldest. Initially set the temperature control dial to 4.
b. After using the refrigerator for 24 hours, adjust the temperature control to the
setting that is best suited to your needs. Turning the temperature control dial
to OFF stops the cooling cycle but does not shut off power to the refrigerator.
If the refrigerator is unplugged or turned off the refrigerator, allow 4 minutes
before restarting it or plugging it into a socket.
c. If the refrigerator will not be used for a period of time, turn the unit off and
unplug. Clean the unit and leave the door open.
d. When transporting the refrigerator, it must be kept in an upright position. If
the refrigerator is inadvertently tilted beyond 45 degrees, restore it to the
upright position and wait 24 hours before plugging it in.
e. Do not operate the refrigerator in the presence of explosive fumes.
VII. Composite Sampling
A composite sample is a series of smaller samples 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 Trigger position). Set the Size control to the desired
sample size. Note that the sample size settings 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 Sensors detect
moisture. If you do not have the optional water sensors or do not need them for your
application, defeat them by plugging one of the two shorting plugs supplied with the sampler
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 every 2 seconds once the sampler is
triggered.
The Start Delay timer begins running when the sampler is triggered by the Rain and Water
Sensors and the first sample is taken when the timer expires. 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 each
sample, the pump reverses for 15 seconds.

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Sampling continues as Trigger-Delay-Sample-Reverse-Interval-Sample-Reverse-Interval-
Sample-Reverse … until the sample bottle 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 same 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 taken when the timer expires. If the Delay
control is set to zero, sampling begins immediately. The Status LED blinks every 2 seconds
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 set to the “External Trigger” position, the sampler can
be triggered externally by either the Trigger In jack or the Rain Sensor input. This mode is
useful in applications where sampling occurs based on readings from a process controller,
SCADA system, flow monitor, auto-dumping rain 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 set to Full for a discrete sample.
The sampler will be triggered when both the Rain and Water 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 Sensor input jack. Place the Rain Sensor at the
desired height in the rain gauge. When the Rain Sensor detects moisture, the sampler will
start.
Once triggered by the Rain Sensor, the Start Delay timer begins running and the Status
LED begins blinking every 2 seconds. When the timer expires, 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

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itself and the Rain Sensor goes dry. The next time the sensor 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 set to take a full-bottle 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 “qualified rain event”. 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 disconnected.
Upon being triggered by the Trigger Input, the Start Delay timer begins running. When the
delay timer has expired, the pump takes a sample based on the Sample Size setting.
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 complete, the pump reverses, then
stops.
Flow Proportional Sampling
a. To set the WS700R up to take flow proportional samples, a flow monitor must
be attached to the control panel. In this configuration, 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 switch closure (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 shown in Appendix C.
The phone plug is then inserted into the Trigger In jack on the control panel.
c. Set the Sample Interval knob to External 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.

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X. Specifications
Operating Temperature: 0° to +70°C
Size of unit: Control Panel: 14 ¼”L X 4”W X 6 ¼”H
Refrigerator: approx 20” x 20” x 20”
Weight: 57lb (Shipping Weight 65lb)
Materials:
Enclosure: Polycarbonate
Bottle: 2 gallon Polyethylene
Pickup Hose: 15' nylon reinforced 1/4" ID polyethylene
flexible tubing section with intake strainer
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
enough power to run the pump to capacity
Start Delay: 16 time settings from 0 to 12 hours
Composite Interval: 15 time settings from 5 min. to 12 hours
plus an External Trigger mode setting
Sample Size: 15 composite sample sizes from 50ml to
2 liters plus a Full Bottle discrete setting
(Approximate sizes at 4 foot head)
External Trigger Input: 250mS minimum pulse width
Switch closure or 4-24VDC
Pulse Output: 5VDC one-second pulse
1000ohm output impedance
Bottle Switch Input: Switch closure Input
Floating read switch in bottle
Rain and Water Sensors: Optional moisture sensors or switch
closure inputs
Internal Fuse: 10A Slow-Blow

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XI. Maintenance
Sampler
a. The Global Water WS700R Water Sampler requires minimal maintenance.
Avoid exposure to extremely rough usage. Routinely wipe the control panel
face and housing, 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/float
switches, removable debris strainers, and pickup hose can be purchased
from Global Water.
Refrigerator
f. Clean the door seal using mild soapy water. Never use harsh cleansers or
scouring pads to clean any part. Wash the inside with warm water and
baking soda solution (about 2 tablespoons of baking soda to a quart of water).
Rinse and dry.
g. Defrost whenever frost on the wall of the freezer compartment becomes ¼”
thick. Never use a sharp or metallic instrument to remove frost as it may
damage the cooling coils. A punctured cooling coil will cause serious
problems and void the warranty. Global Water recommends using a plastic
scraper.
Battery
h. If the pump runs slowly, this is an indication that the internal battery requires
recharging. We recommend 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.
b. To recharge the battery, plug the AC power adapter into the control panel and
then plug the charger into a wall socket, ensure that the pump does not run
during the charging period. Full recharge will take about 12 hours. Additional
batteries and AC power adapters are available from Global Water.

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XII. Troubleshooting
a. Check that the battery is firmly connected 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 state of any of the inputs.
c. Turn 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 LED 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 selected on the Interval control.
Check the pulses coming from the triggering device and confirm they
meet specifications. Test the Trigger Input by plugging one of the
shorting plugs supplied with the sampler into the jack.
ii. The LED 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 LED is on constantly: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 the shorting 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].
Be prepared to describe the problem being experienced including 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 for any
reason, please call to obtain a RMA # (Return Material Authorization). Do not
return items without a RMA # on the outside of the package.

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Decontaminate the WS700R prior to returning.
Include a written statement describing the problems.
Send the package with shipping prepaid to Global 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 the 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 number.
5. Repair instructions and/or specific problems 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 are limited to, at Global Water’s option:
(I) replacing or (II) repairing; any products determined to be defective. In no
case shall Global Water’s liability exceed the products original purchase price.
This warranty does not apply to any equipment that has been repaired or
altered, except by Global Water Instrumentation, 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.
b. The warranty begins on the date of the product’s invoice.

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Actual Sample Size vs. Sample Size Control for Various Head Heights
0
200
400
600
800
1000
1200
1400
1600
1800
2000
0250 500 750 1000 1250 1500 1750 2000 2250
Actual Sample Size (ml)
Sample Size Control Setting (ml)
Appendix A: Sample Size Calibration
Use the following graph to see how sample size changes with 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 vertical
axis and read the setting for the Size control on the control panel.
14 Feet
2 Feet

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Appendix B: Battery Life
While battery life depends on several factors such as charge, condition and temperature; it
can generally be assumed that the sampler can deployed in the field for more than 3
months waiting to be triggered, while still retaining 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
00-017
Each
2 Gal Plastic Sample Bottle
00-738
Each
Bottle Cap/Float Switch
CD0300
Each
Pickup Hose
00-546
Feet
Pickup Strainer
CA0300
Each
Pump tubing
00-744
Feet
Rain and Water Sensors
CA0400
Each
Auto-Drain Rain Gauge
CH0000
Each