Signal Trim Summing Junction Box Model 1200
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Stainless Steel NEMA 4 enclosure contains printed circuit card specifically designed to adjust each load cell Span without effecting zero. One multiturn potentiometer per load cell shunts the output and two series output isolation resistors limit zero interaction. Terminal blocks are lever type that simplify wire connection. Strip the wire, push the lever, insert the wire and release the lever. Accepts wire size 26 to 14 AWG. One terminal block for each load cell and one terminal block for the indicator. Expansion terminal block is on models 1250, 1251 and 1260 for expansion to another summing box. Span adjustment is 3% for 350 ohm load cells; 5% for 700 ohm load cells. Corrosion proof nylon strain reliefs are provided for cable 0.197"-0.354" dia. Enclosure size is 6-1/2" x 8-3/8" x 1-3/4"H. Circuit card size is 4-7/8" x 6-3/4" x 5/8"H
Section Adjustment 1251, 1260, 1280, 12100 circuit cards have section adjust pots for ease in scale calibration. First the two cells in each section are matched. then the sections are matched with the additional section pots. Both cells in a section should have load cells. if one load cell is not wired to a section, resistors should be connected that have an equivalent resistance.
Conduit Adapter
Mount on the cable fitting on Sensortronics Tank Mount and Truck load cells. The external 1/2" NPT will connect to standard conduit and adapters.
Corrosion Proof Strain Reliefs
Nylon strain relief with neoprene gland resists salt water, weak acids, gasoline, alcohol, oil, grease and common solvents. 1/2" hub size for 7/8" dia. hole. Sealing washer and lock nut.
Compact Summing Junction Box Model CSB
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Compact junction box with Signal trim for 4 load cells. Signal trim has one multiturn potentiometer per load cell that shunts the output and two series output isolation resistors that limit zero interaction. Optional Excitation trim is available. Excitation trim has one potentiometer per load cell in the excitation circuit for adjusting the load cell input voltage. Terminal blocks are lever type that simplify wire connection. Strip the wire, push the lever, insert the wire and release the lever. Accepts wire size 26 to 14 AWG. Five nylon strain reliefs are included for load cells & instrument cables. Two screws that hold the cover have drilled heads for lead and wire sealing. Stainless steel NEMA 4 box and gasketed lid for corrosion resistance. The small size of this box makes it a good replacement for low profile warehouse scales. In many cases the box will fit under the platform. 7" x 4.625" x 1.75"h, 2 lb.
General Sensor Compact Summing Junction Box Model GS-JB-4
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Extremely small junction boxes with Signal trim for 4 load cells. One multiturn potentiometer per load cell that shunts the output and two series output isolation resistors that limit zero interaction. Screw terminals simplify wire connection. Accepts wire size 26 to 14 AWG. Five nylon strain reliefs are included for load cells & instrument cables. Both boxes are NEMA 4X and gasketed for corrosion resistance. The GS-JB-4-SS is made of stainless steel and the GS-JB-4-FRP is made of fiberglass reinforced plastic. The small size of these boxes make them a good replacement for low profile warehouse scales. In many cases the box will fit under the platform. 7" x 4.625" x 1.75"h.
Hole Plug
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Seals unused 7/8" dia. holes in summing junction box or instrument enclosure. Cover disk is gasketed with internal washer and wing nut for tight seal.
J Box With Summing Card and with Excitation Trim
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Compact, stainless steel junction box with summing card. Box is 9.5"L x 2.5"W x 2.5"H. Card is 6.5"L x 1.5"W x 1.25"H. Up to four cells will be summed. Two cable strain reliefs.
Excitation Trim Model SJC-4 Card Only Junction Box
Circuit card is arranged for parallel summing of 2 to 4 load cells. Ideal for making corner sensitivity adjustments for scales. Convenient, lugless connections for load cell and readout. Two pots provided for each load cell to minimize interaction between span trimming and zero shift. Separate terminal block for each cable. Internal connection of sense to excitation leads. Common shield connection provided for each cable. Low resistance (10 ohm), 20 turn pots for good resolution. Size 3.5"W x 0.5"H x 4.5"L
Strain Relief Junction Box Parts
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Used to connect load cell cable to summing junction boxes or instrument enclosure. 1/2" hub size for 7/8" dia hole. Aluminum with rubber cable bushing, "O" ring gasket and locknut. Connector is installed with "O" ring gasket on outside of box for watertight fit. Lock nut holds from inside. Knurled collar compresses bushing around cable for watertight fit and relief of strain on cable inside box.
Summing Card for Floor Scales
Replacement part for use in floor scales. Includes velcro mounting tape for attaching to junction box cover. Excitation trim with one potentionmeter for each load cell. Screw terminals for secure wire connections. Dimensions 1" x 4.5" x 0.75"
Surge Protection Spare Parts
For use with 1250-SP Surge protection summing cards and boxes.
Summing box with Card Model TJB61
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The 61 and 62 Summing Card is 1-3/8" x 5-3/4". It has four 5 position terminal strips for load cell inputs and one 7 position terminal strip with internally jumped sense terminals for output to the instrument. Terminal strips are screw operated cage clamp design or optional lever type design.
Trimming of signal output is accomplished with four 25 turn trim pots with an operating temperature range of -55 to +125 degrees C. The board will sum 2 to 4 load cells and can be mounted with the four 11/16" mounting holes provided with a spacing of 2-1/2 x 3- 1/2" on center.