Xylem WS755 IMPROVED WASTEWATER/STORMWATER SAMPLER - Manual (Page 4)

Global Water
800-876-1172
• globalw.com
- 4 -
III. Description
The Global Water WS755 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 two peristaltic sampling pumps, two
sample bottles, two pickup hoses and strainers 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 WS755 Sampler can take two individual “time weighted” composite samples,
or the sampler can be set to take full-bottle discrete or “Grab” samples. Each
pump has its own sample bottle and control for setting the size of individual
samples. This allows each pump to be set as either a composite or discrete
sampler independently of the other or, in the case of two composite samplers,
have different size settings for each pump.
A 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 pumps 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 signals from an external process controller or other monitoring device.
Individual outputs are also available for monitoring when each of the pumps has
taken a sample, using a data logger or similar recording device.