Global Water WS705 Instruction Manual

Global Water

800-876-1172 • globalw.com

Global Water

Instrumentation, Inc.

11390 Amalgam Way

Gold River, CA 95670

T: 800-876-1172

Int’l: [phone], F: [phone]

globalw.com

WS705 Water Sampler

01-956 11/30/2009

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Global Water

800-876-1172 • globalw.com

Table of Contents

I. WS705 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 • • • •
VIII. Discrete Sampling • • • • • • 8
IX. External Trigger mode • • • • • 9
X. Specifications • • • • • • 11
XI. Maintenance • • • • • • 12
XII. Troubleshooting • • • • • • 12
XIII. Warranty • • • • • • • 14
XIV. Appendix A: Sample Size vs. Head Height • • • 15
XV. Appendix B: Battery Life • • • • 16
XVI. Appendix C: Input and Output Connections • • • 16
XVII. Appendix D: Replacement Parts and Accessories • • 17

XVIII. CE Certification • • • • • • 18

* Copyright © Global Water Instr umentation, Inc. 2009

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Global Water

800-876-1172 • globalw.com

Congratulations on your purchase of the Global Water WS705
Water Sampler. This instrument has been quality tested and approved for
accurate and reliable operation. We are confident that you will find the
WS705 to be a valuable asset for your applications. Should you require
assistance, our technical staff will be happy to help.

I. WS705 Checklist

1. WS705 Water Sampler with Transport Case

2. 20-Mesh Pickup Strainer w/ 15’ of Hose

3. 12V Battery in Battery Enclosure

4. 3-Stage Charge Controller

5. 18 Volt Regulated Battery Charger

6. Battery Cable

7. Two Water Sensor Shorting Plugs

8. Quick-Disconnect Fitting Cap and Plug

9. WS705 Manual

II. Inspection

The WS705 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 WS705 Water
Sampler was received.

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III. Description

The Global Water WS705 Sampler is designed specifically to meet a wide variety
of sampling requirements including industrial discharge, process control, water
and wastewater treatment plants, sewers, rivers and streams.

The sampler consists of a rugged, rainproof and lockable wheeled transport case
with a comfort grip handle on top and retractable handle on the back. The
enclosure houses a control panel with peristaltic sampling pump, sample bottle,
pickup hose and strainer with quick-disconnect fittings, a rechargeable battery
with 3-stage charge controller in a self contained battery box, and a energy
efficient regulated battery charger.

The WS705 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.

Global Water

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Global Water

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IV. Installing the Water Sampler

a. The sampler should be placed upright (it will not 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. Remove the pickup hose and connect it to the sampler using the quick-

disconnect fitting on the side of the enclosure. Place the protective cap over
the protective quick-disconnect plug and save for future use.

d. To secure the sample bottle:

1. Screw the bottle cap/float switch onto the sample bottle

2. Place the bottle into the sampler enclosure

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

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

e. The sampling unit can be secured from vandalism and strong winds by one of

the following methods:

1. Mount unit on post and lock closed

2. Lock closed and chain handles to a solid structure (such as a tree, post, or
building)

3. Enclose and lock unit in a steel electrical box

f. Avoid drilling holes in the enclosure if possible. If holes must be drilled in the

enclosure avoid drilling through the control panel enclosure. Any holes drilled
through the enclosure must be sealed with some type of sealant to prevent
water from entering the case and causing equipment failure.

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

above the expected water level to continue to provide reliable service.

V. Installing the Pickup Hose

Remove the pickup hose from the enclosure and connect it to the sampler using the
quick-disconnect fittings. Place the protective cap over the protective plug and save for
future use. When storing the hose inside the enclosure, replace the protective cap and
plug to keep the fittings clean of dirt and contamination. 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.

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VI. The Control Panel

1. Pump.

2. Start Delay:
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:
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:
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:
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.

Global Water

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This setting delays sampling by a preset amount of

Sets the time interval between composite samples.

Sets the size for a single composite sample. The

This input works in “External Trigger” mode only, as

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