Xylem WS700R REFRIGERATED WASTEWATER SAMPLER User Manual Page 8

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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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