Global Water WS755 Quick Start Manual page 4

Global Water
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 and
a rechargeable battery in a self-contained battery box.
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.
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