Globalwater WS700R Manuale utente

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: (979) 690-5560, Fax: (979) 690-0440

E-mail : globalw@globalw.com

01-533

Publication Number 38910512

Global Water

800-876-1172 •globalw.com

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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

Global Water

800-876-1172 •globalw.com

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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.

Global Water

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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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