Campbell Scientific CVS4200 / BVS4300 Stationary Samplers - Manual (Page 37)

CVS4200 / BVS4300 Stationary Samplers
If programmed with the FAULT SHUTDOWN “disabled”, the sampler will
not make a second attempt to draw the sample, but will simply abandon it and
await the next sample initiation. Neither will the unit suspend the sampling
program after consecutive failures. This function is provided for use in the
event that the sample source may be lacking sufficient fluid from which to
draw, for a period of time , yet allows the sampler to continue operating
without a FAULT SHUTDOWN occurring. The second attempt is not made to
prevent unnecessary wear on the sampler.
7.3.2 Line Voltage Failure
Should the sampler have a factory installed internal battery or have an external
battery connected, the sampler will continue operating (with the exception of
the refrigerator and heater). The duration of operation will depend on the
capability and charge level of either battery. The frequency and the length of
each sample cycle will also have an impact on how long the batteries will last.
7.4 Operating Instructions
7.4.1 Sample Volume Adjustments
Setting the desired sample volume is accomplished by adjusting the height of
the volume control tube within the metering chamber. The tube is mounted
through the top of the chamber with a gland nut fixing the position. To adjust
the sample volume, loosen the nut until the volume control tube may be moved
freely. Raise or lower the bottom end of the tube to the desired volume using
the lines provided on the side of the chamber as a guide (lines are spaced at 100
cc intervals with the exception of one at 50 cc). Tighten the gland nut to hold
the volume control tube at the desired position.
The volume control tube should always be located below
the liquid sensing rod. CAUTION
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