Presentation on theme: "The Swain Meter Co. A brief history of Swain and Operational Procedures By Scott Miret 10/7/08."— Presentation transcript:
The Swain Meter Co. A brief history of Swain and Operational Procedures By Scott Miret 10/7/08
William H. Swain founded the company in 1965 Bill Swain founded the William H. Swain Co. in Sarasota Florida back in Previous to this Bill was employed in various roles with the US military and NASA – working on guidance systems for rocket and advanced marine navigation tech for that time period. Bill Pictured second from left
Development of the SWAIN METER In 1965 Bill Swain developed the first DC Clamp-on Ammeters. These durable and accurate instruments were created to help pipe line operators monitor cathodic protection (CP) current flow on their lines. Used in a wide variety of industries all over the world, Swain meters measure the magnitude and direction of current on conductors. From the beginning Swain meters were used not only as portable DC and AC current measuring devices, but as permanently installed instruments on buried pipelines both on-shore and in sub-sea applications. The uniqueness of the Swain Meter is the same today as it was 43 years ago when Bill built his first meter. This DC Clamp –on ammeter is Still the only one of its kind in the world today. Pictured below are some of Swains first analog ammeters.
The next 40 years In the mid 1980s Swain meters were fitted with digital LCDs. The technology remains basically the same while the meter face becomes more streamlined and user-friendly.
Swain Meter evolves Later models of Swain meters in the 90s and 2000s still use the bullet-proof and patented technology. These later models have digital LCDs and further simplified controls. Swain meters are manufactured in 2 models – The MER Meter (pictured left) has a manual Zeroing knob and Range select switch.
Swain Meter evolves The second meter we call the AUTO MER. This features Auto- Zeroing and Automatic Ranging from 0 – 2.0 Amps, 0 – 20 Amps & 0 – 200 Amp ranges. Both MER and AUTO MER Meters have data output Jacks.
The technology that drives the Swain Meter has changed little in over 40 years. Yet the switch from Analog to Digital technology has greatly increased the efficiency of the manufacturing and calibration processes. Old SchoolNew School
Swain Clips & Clamps Swain Clips & Clamps are precise and sensitive instruments that form a 360` closed loop around a conductor. Swain Clips and Clamps are also referred to in literature as Sensors connect to the MER meter. Swain Sensors are rugged, hand crafted instruments that work in harsh environments
Clips & Clamps come in many sizes Clips are hand held, spring loaded sensors for quick readings on conductors. Clips are built from 3/4 in diameter through 6 in diameter. Clips shown to the right are sizes: Mini-Clip (no longer built), 3/4, 1.5, 2.5, 4 & 6.
Swain Clips & Clamps Clamps are sensors made in 2-half circles that go around Conductors then held together with Nuts to form a circle. Clamps are built in diameters beginning at 6 through 82. Clamp diameters from 60on up are built in 4 sections.
Larger Clamps 42 Clamp Clamp Construction
Larger diameter clamps must be manufactured in 4 pieces. This clamp is being assembled for a field test prior to shipping. 82 MER 2 Clamp Clamp is constructed in 4 Sections
Our largest to date – 82 This 82 Clamp was sold to Water Care Services in Auckland New Zealand in Summer 07 Clamps of this size usually require their own AUTO MER meter
80 Clamp sold to San Diego County Water Authority Long time Swain enthusiast Brendan Sheehan
80 clamp in use in San Diego to test flanges
Brian Horanoff, President of The Swain Meter Co. & wife Deb showing off trophy Salmon taken in Lake Michigan.
What IS a Swain Meter? Precision built and calibrated instrument, coupled with clips or clamps, used to measure magnitude and direction of current flow. Swain meters are used today in most all countries on the planet.
MER Meter with 4 clip The MER meter allows the operator to manually adjust the zero and range switch. The AUTO MER does this for the operator
USES Corrosion Control CP system circuit diagnostics Locate shorts Find foreign line interference Rectifier output Anode cables Telluric Current Studies
USES POWER GENERATION Battery float charge and load current Grounding system current drain Tower leg interference Guy wire current drain Data-logger studies
USES MARINE Dock/Platform anode current Current leakage from propeller Undersea pipelines/anode cables ROV capable Oil rig platform testing Ship anchor current leakage
USES AUTOMOTIVE Current leakage in electrical systems Alternator and battery diagnostics Production plant assembly
USES Energy Transmission Flange leakage Direct burial for long-term monitoring Interference testing Used during direct assessment of pipe
Other Uses Copper Electro-winding Nitric Acid drilling INS troubleshooting Dairy farm stray current DC transit stray current Well Head current measurements Defense industry Defense Contractors
Refineries use Swain meters to precisely measure current distribution and to see if insulating flanges are working. Individual cables in rectifiers are measured with accuracy as are banks of pipes and cables in close proximity
Standard Operation of the Swain Meter
Using the MER Meter The Swain meter is a precise instrument that measures DC current from 5-milliamps to 200 Amps with a + /- 1% accuracy. The meter measures with a 1-milliAmp resolution in the 0 – 2 Amp Range 10-milliAmp resolution in the 0- 20Amp Range 100-milliAmp resolution in the 0 – 200 Amp Range The meter will cancel out up to a 10-Amp AC interference - this designed to maintain accuracy with DC measurements
Using the MER Meter Connect the Clip or Clamp to the Swain Meter Turn the On/Off Switch to the ON position Turn Range Select to 2A Hold the Clip or Clamp 6 inches away from the conductor, oriented so the plane of the clip/clamp intersects the conductor at a right angle Hold the Clip/Clamp still Adjust Zero knob until LCD reads Zero *(You have successfully canceled the earth field reading) Place clip/clamp on conductor and observe reading If current exceeds 2-Amps and Over Range message appears on LCD – Turn Range knob to 20A or the 200A position
Using the MER Meter Current direction is indicated by either the presence or the absence of a Negative Sign the left of the numbers on the LCD The current direction Arrow is etched onto the sides of all clips and clamps. Take a reading with the clip/clamp in one direction then flip-it 180` and notice the appearance of the Negative sign. * Current direction is always flowing in the positive clip/clamp orientation
Clip on conductor and take reading
Using the AUTO MER The Swain meter is a precise instrument that measures DC current from 5-milliamps to 200 Amps with a + /- 1% accuracy. The meter measures with a 1-milliAmp resolution in the 0 – 2 Amp Range 10-milliAmp resolution in the 0- 20Amp Range 100-milliAmp resolution in the 0 – 200 Amp Range The meter will cancel out up to a 10-Amp AC interference - this designed to maintain accuracy with DC measurements
Using the AutoMER Connect the Clip or Clamp to the Swain AutoMER meter Hold the Clip or Clamp 6 inches away from the conductor, oriented so the plane of the clip/clamp intersects the conductor at a right angle Hold the Clip/Clamp still Turn the On/Off Switch to the AUTO position. Wait several seconds until the Ready light comes on *(You have successfully canceled the earth field reading) Place clip/clamp on conductor and observe reading If current exceeds 2-Amps the AutoMer meter automatically changes ranges to the 20A range or 200A range
Using the AutoMER in Manual Mode Turn On/Off Switch to Manual Mode Hold clip/clamp steady near conductor Zero meter using the Zero knob Place clip/clamp onto conductor and take reading *To manually change ranges, turn On/Off Switch from Manual to Off for a split second. Note the LCD decimal point shifts one position to the right. Repeat to change ranges again. Example of LCD positions:.000 = 2A Range 0.00 = 20A Range 00.0 = 200A Range