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Overview
The PVS5120D is a discrete sampler that deposits its water samples into 1 to 24 containers. 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 data logger 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 PVS5120D 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.
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Benefits and Features
- Diagnostic feedback provided to the master device: bottle number, sample number, response code/message, sampler battery voltage
- The installation of a bottle position encoder enables verification of arm position before sampling and then moving the arm if it is not centered above the correct bottle
- Multiple bottle configurations possible: 1, 2, 3, 4, 6, 8, 12, 24
- 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
Images
Detailed Description
The PVS5120D 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.
Specifications
| Specialized Applications | Fits in small-sized manholes. Can be suspended by stainless-steel harness for sewer applications. |
| 5/8 Inch ID Tubing Compatible | No |
| Sample Container | twenty-four 0.5 L bottles or twenty-four 1 L bottles |
| 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 |
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| Operating Voltage |
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| Body Case Diameter | 42.8 cm (16.85 in.) |
| Height |
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Weight |
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| 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) |
Controller |
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| Sampler Triggering Methods |
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| 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. |
| Bottle Position Encoder | Verifies arm position and moves to correct bottle if it is out of position. |
| 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) |
Vacuum System |
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| 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) |
| Horizontal Maximum Transport Distance | 67 m (220 ft) |
Vacuum System |
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| Metering Chamber Cover |
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| 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 |
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Compatibility
The PVS5120D can interface with Campbell Scientific data loggers or RTUs from other manufacturers.
Our data loggers can interface and communicate with nearly any turbidity, water level, or hydrometeorologic sensor, as well as control the sampler based on time, event, or measured conditions.
Downloads
PVS5120 Sample Programs (5.79 KB) 08-10-2014
Example CR1000 programs for triggering a PVS5120 that has been configured to run on SDI12 commands, PakBus commands or ModBus commands.
VSC100 OS v.7.0 (478 KB) 07-07-2015
VSC100 Operating System.
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