Automatic Stationary Liquid Samplers
Model: CVS-C; Indoor Composite
Model: CVS-D; Indoor Discrete
Model: BVS-C; Outdoor Composite
Model: BVS-D; Outdoor Discrete
General Information
Southwells Sirco brand stationary samplers incorporate our patented vacuum/compressor
sampling system. Sample fluid travel is limited to the intake hose, metering chamber and discharge hose, eliminating sources of cross-sample contamination such as pumps, valves and distribution plates. Repeatable sample volumes are obtained by accurate volumetric measurement of each sample, while rapid transport velocities ensure representative concentrations of solids in the sample fluid.
Interval time and flow proportional sampling are standard with every Southwell sampler. Sample initiation settings are now menu selectable. Flow proportional inputs include 4-20mA, multiple pulse and external contact closure as well as sustained level control.
Stationary samplers are manufactured to provide the extended, low maintenance operation required in permanent installations. Enclosures are fabricated from heavy gauge steel with heat cured polyester based powder paint for added corrosion resistance. BVS series outdoor models feature a locking door and bolt down instrument panel for security protection. Optional thermostatically controlled forced air heater and cabinet insulation are offered for operation in cold weather conditions. The CVS series offers all the capabilities of the BVS samplers in a compact indoor design.
Custom Design
In addition to standard production model samplers, Southwell Controls can also provide custom designs for special applications. Should additional features be required for your monitoring program, please contact us or your nearest representative to discuss your specific requirements.
Sampling Sequence
Sample collection begins with a high pressure air purge of the intake assembly to remove residual liquid and obstructions. Upon completion of the pre-purge cycle, the system converts to a vacuum state, drawing the sample through the intake hose, into the metering chamber until contact is made with the adjustable level sensor. The system then pressurizes, ejecting excess fluid back through the intake line until the predetermined sample volume is achieved. If the sampler, for any reason, is unable to draw a sufficient volume of fluid to obtain a sample, the operator may program the unit to automatically initiate a second attempt. Should a sample not be delivered after a second attempt, the sampler shall abort the sequence and await the next sample initiation signal. Upon two consecutive failures the sampler will suspend the sampling program until manually reset and provide a sample fault indication.
Sampler Controller
The multifunction controller is designed for versatility and simplicity. Housed in an environmentally sealed enclosure for corrosion protection, the microprocessor based controller is programmable via a 16 position keypad. All information is viewed on a 2 x 16 character LCD backlit display which guides the operator through programming sequences with easily understood directions. In the event of power failure, all program settings and information stored in the controller are maintained by an internal lithium battery.
Volumetric Metering Chamber
Available in both 500cc and 1000cc configurations, our large capacity metering chambers deliver repeatable sample volumes regardless of variations in suspended solids content, sample lift or fluid velocity at the sample source.
Adjustable volume pre-sizing provides complete flexibility in both final sample volume and oversizing of the sample for representative results. Sample fluid is expelled under pressure to the sample container ensuring collection of all solids. Wetted materials consisting of glass, stainless steel and fluorocarbon resins are offered for toxic sampling applications.
Rapid Sample Transport Velocities
Southwells patented system maintains sample transport velocities through a 3/8 ID intake hose in excess of 3 ft/s for sample lifts up to 20 ft. This important feature allows representative sampling of large particles (unaltered or deformed) and suspended solids over high lifts without the precipitation problems associated with lower transport velocity samplers. A 5/8 ID intake system is also available for collection of even larger particles and reduced risk of intake line fouling. This larger system maintains transport velocities in excess of 3 ft/s for sample lifts up to 16 ft.
Design Specifications for BVS/CVS Series Stationary Liquid Samplers
Start Delay Disabled no start delay Time/Day adjustable, up to 1 week in advance Pulse Count adjustable, up to 9999999 4-20mA adjustable, up to 999999 (4-20mA = 0 to 100 Pulses/Minute) External Contact momentary, 25 millisecond dry contact Level Control adjustable, up to 99 second contact duration Sample Initiation Disabled no sample initiation Interval Time adjustable up to 999 hours, 59 minutes Pulse Count adjustable up to 9999999 4-20mA adjustable, up to 999999 (4-20mA = 0 to 100 Pulses/Minute) External Contact momentary, 25 millisecond dry contact closure Program Type Composite terminate after up to 9999999 samples Multi-Composite adjustable up to 99 cycles per bottle Consecutive adjustable up to 9 bottles per cycle Daily Cycle adjustable up to 9 bottles per day (total not exceeding actual bottle count) Timed Step adjustable up to 99 hours, 59 minutes per step Clock Real Time clock real time operating system Pinch Valve Fixed normally open Purge Cycle Adjustable 1 to 99 seconds Suction cycle Variable adjusts automatically to double the input value of the purge time setting or until liquid contacts level electrode in metering chamber Alarm Outputs (Independent) Cycle abandoned (DC relay driver, sinking, momentary) Sample fault (DC relay driver, sinking, sustained) Container full (DC relay driver, sinking) Status Outputs Sample taken (DC relay driver, sinking, momentary Direct Function Keys Manual sample Manual purge Manual bottle advance Switches Run/off (SPST toggle) On/off (5 amp lighted breaker) (opt) Refrigerator on/off (5 amp lighted breaker) (opt) Heater on/off (5 amp lighted breaker) Sample Volume Adjustable, 50cc to 500cc (opt) Adjustable, 500cc to 1000cc Sample Transport Velocity Minimum of 3 ft/s at 20 ft of lift (3/8 ID intake) Minimum of 3 ft/s at 16 ft of lift (5/8 ID intake) |
Metering Chamber 500cc capacity, clear acrylic, calibrated in 100ccs (opt) 1000cc capacity, clear acrylic, calibrated in 100ccs (opt) 500cc capacity, glass (Pyrex), calibrated in 100ccs (opt) 1000cc capacity, glass (Pyrex), calibrated in 100ccs Volume Control Tube 316 stainless steel Metering Chamber Level Electrode 316 stainless steel Intake Hose Nylon reinforced PVC, 3/8ID by 25 c/w sinker (opt) Nylon reinforced PVC, 5/8ID by 25 c/w sinker (opt) Teflon lined Tygon, 1/2ID by 25 c/w SS sinker Discharge Hose Latex, 3/8 ID (opt) Latex, 5/8 ID (opt) Silicone, 3/8 ID (opt) Silicone, 5/8 ID Sample Containers (composite only) (opt) 2.0 US gallon ( 8 litre) high density polyethylene (opt) 5.0 US gallon (20 litre) high density polyethylene (opt) 2.5 US gallon (10 litre) glass Sample Containers (discrete only) 24 x 500cc polyethylene (opt) 12 x 500cc glass (opt) 8 x 1 litre glass (opt) 6 x 2 litre glass (opt) 4 x 4 litre glass (opt) 3 x 10 litre glass Refrigerator (opt) 5 cu. ft., adjustable to maintain 4 ° C Available displays Real time clock Process timing (elapsed, remaining) Process totals Pulse counting (internal/external) Event response (with time stamp) Flashing prompts Automatic displays Container full (sample program complete) Fault (program not complete) Interrupt (program resumed) Alternating time stamp Cycle(s) abandoned Enclosure Outdoor installation ( BVS series): Nema 3 weatherproof 14 gauge steel enclosure with heat cured polyester based powder paint for corrosion resistance and lockable door Indoor installation ( CVS series): Nema 1 general purpose 14 gauge steel enclosure (upper control section only) with polyester based powder paint for corrosion resistance. Supply Voltage Sampling system: 115 Vac / 60Hz or 12 Vdc Refrigeration and heating units: 115 Vac / 60Hz |