Campbell PVS5120 Series, Instruction Manual

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PVS5120-Series Portable Samplers
15
•
Sample Chamber – Pressure Relief : Enable the pressure relief
option when collecting large sample volumes and/or using long hose
lengths (over 50 ft) for discrete samplers. This setting should not be
used with short hose lengths (less than 25 ft) since extra sample
volume may be collected. This setting vacuums the sample chamber
for a short time immediately after setting the sample volume level.
Enabling the feature removes back pressure present in long hose
lengths and reduces nozzle spray when depositing the sample to
discrete bottles.
6.2.4 Pulse Settings Tab
FIGURE 6-7. Pulse Settings tab
Once Pulse is chosen as the
Control Type
via the
Sampler Settings
tab
(Section 6.2.2 , Sampler Settings Tab
(p. 12)
), the options within the Pulse
Settings tab become available.
•
Start Pulses : The number of input pulses needed to initiate the sample
process. The range is 1 to 10,000 pulses. The controller continues to
accumulate pulses even when the sampler is running.
•
Finish Pulses : The number of pulses returned by the sampler after
successfully finishing a sample cycle. It is important to note that no
pulses are returned if an error/fault is generated.
• Start Pulse Type : Specifies whether the Start Pulse is a positive pulse
or a contact closure/open collector (negative pulse). See Section
8.2.6 , Pulse Control
(p. 50)
, for more details.
6.2.5 Time Settings Tab
Once
Time
is chosen as the Control Type via the Sampler Settings tab
(Section 6.2.2 , Sampler Settings Tab
(p. 12)
), the options within the
Time
Settings tab become available (FIGURE 6-8 ).