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Bộ lấy mẫu chất lỏng hỗn hợp di động Campbell Scientific PVS5120C
The PVS5120C is a composite sampler that deposits its water samples into a nine-liter container. This sampler uses a vacuum sampler controller, the VSC100, to allow a Modbus RTU master, SDI-12 master device, simple pulse input, or Campbell Scientific PakBus datalogger to control and communicate with the water sampler.
This sampler is lightweight, portable, and battery-powered. It can fit in a small-sized manhole and be suspended by a stainless-steel harness for sewer applications.
The PVS5120C can be used with a standard or large pump. The standard pump takes samples at 1.6 m/s (5.1 ft/s) for horizontal draws of 7.6 m (25 ft). The large pump takes samples at 2.2 m/s (7.1 ft/s) at 7.6 m (25 ft). Both of these velocities are typical values measured at sea level. Intake velocities will decrease as altitude increases.
Benefits and Features
Diagnostic feedback provided to the master device: bottle number, sample number, response code/message, sampler battery voltage
Auto deploy that automatically sets the purge and vacuum times based on hose length
Repeatable volume collection via metering chamber
Selectable internal or external power via three-way power switch
One control cable for all control types
An optional water present sensor detects the presence of water at the mouth of the sampler intake hose to ensure a sample is available
The PVS5120C uses an external vacuum pump to draw water through intake tubing, instead of the traditional peristaltic pump that induces flow by squeezing flexible tubing. Because the vacuum method disturbs the water samples less, they better represent the original water solution, especially if the solution has high concentrations of supsended solids.
To prevent cross contamination, the sampler uses air pressure (up to 28 psi) to purge the tubing of excess water. The standard pump can lift as high as the large pump and is appropriate for most applications─especially when the power budget is a concern. The large pump is appropriate for applications with long hose distances or high lifts because it provides higher pumping velocity.
|Enclosure||LLDPE (linear low-density polyethylene), three-piece construction, and stainless-steel fittings|
|Cooling System||Insulated container wall, cavity space for ice|
|Horizontal Velocity||Refer to the "PVS5120 Intake Velocity versus Hose Length at Sea Level" plot.|
|Storage Temperature Range||-20° to +50°C|
|Operating Temperature Range||
|Body Case Diameter||42.8 cm (16.85 in.)|
|Sampler with Standard Pump and No Battery||10.4 kg (23 lb)|
|Sampler with Large Pump and No Battery||11.8 kg (26 lb)|
|7 Ah Battery||1.8 kg (4 lb)|
|17 Ah Battery||6.3 kg (14 lb)|
|Sampler Triggering Methods||
|RS-485 Communication||Can return sampler status when triggering samples via pulse or time-based control.|
|Backup Power Source||Internal lithium battery maintains program settings and information in case of power failure.|
|Multi-purpose Button||Service sampler, collect manual sample, and auto deploy|
|Auto Deploy||Automatically sets the purge and vacuum times based on hose length (between 25 and 100 ft)|
|Sampler Status/Feedback||Bottle number, sample number, response code, sampler battery voltage (available after every sample)|
|Pinch Valve||Fixed – normally open|
|Purge Cycle||Adjustable from 1 to 800 s (280 s for SDI-12)|
|Suction Cycle||Variable (until liquid contacts level electrode in metering chamber or adjusts automatically to two times the purge time)|
|Metering Chamber Cover||
|Volume Control Tube||316 stainless steel|
|Metering Chamber Level Electrode||316 stainless steel|
|Intake Hose||Ordered as a common accessory. Campbell Scientific offers PVC hose with 25-ft and user-specified lengths. Intake end can have a lead sinker or stainless-steel strainer. Sampler end can have a clamp or quick-connect termination.|
|Discharge Hose Material||