The PR 6221 range of load cells is designed exclusively for use on road weighbridges. The unique design principle, combined with the installation kits, counterbalances movements caused by mechanical or thermal expansion or contraction of the weighbridge construction. The unique combination of the selected geometry and material/surface hardness parameters guarantees perfect rolling characteristics, high restoring forces and long-term maintenance-free operation.
A particular design characteristic is that the height and shape of the load cell remain constant over various load stages, whilst there is a particularly high overload range of, in part, up to 200%.
At the same time, this range distinguishes itself – in addition to its high measurement accuracy and repeatability – above all for its unmatched reliability, robustness and stability, which enable trouble-free operation without adjustment, year after year. The pendulum support principle, combined with patented measuring element geometry, ensures that force transmission into the sensor is always at the optimum level and, in this way, the effect on measurement accuracy is minimized. At the same time, the load cell offers a particularly high overload range. The hermetically sealed enclosure and special TPE cable allow the unit to be used even under extreme operating conditions.
Special resistance strain gauge technology, in combination with the PR6021/.. cable junction boxes, provides for demonstrably improved lightning protection. The entire measurement chain can be calibrated without the use of a reference weight. Due to “matched output" technology, in many cases electrical corner adjustment is not required. This saves a tremendous amount of time during commissioning. An explosion-proof (Ex) version of this range of load cells is also available, as an option, for use in intrinsically safe environments.
For each mm of movement that the top of the load cell shifts from the vertical axis, a horizontal restoring force of 0.5 % of the applied vertical load is generated.
傳感器從頂端到垂直軸的每一毫米移動,都會產(chǎn)生0.5%的水平回復(fù)力。
傳感器外殼結(jié)構(gòu)
Deep draw pulled housing, membrane and measuring element hermetically sealed, welded, filled with inert gas。
深沖壓牽引外殼,薄膜和測量原件密封和焊接技術(shù),內(nèi)部充滿惰性氣體。
材料編號
1.4301 (DIN 17440), 304 S15 (B.S.)
電纜線
robust, flexible, screened, sheath: TPE, colour: green (for PR 6221/..E: colour: blue), diameter: 5 mm, 4 x AWG22 (0.35 mm2), length: 16 m, bending radius: 50 mm (fix), 150 mm (flexible)
電纜線耐用,柔韌性好,屏蔽。直徑:5 mm, 4 x AWG22 (0.35 mm2),長度:16m。彎曲半徑:50mm(固定),150mm(靈活)
彎曲半徑
Fixed installation: ≥ 50mm 固定安裝:≥ 50mm
Flexible installation: ≥ 150mm 靈活安裝:≥ 150mm
認證
II 1G EEx ia IIC T6, II 1D IP65 85°C
注冊號:PTB 02 ATEX 2059, TüV 03 ATEX 2301x
No corner adjustment necessary
不需要砝碼即可校準(zhǔn)
High overload capacity
超高過載能力
IP 68 (1.5 m/10.000 hrs), IP 69K (washdown cleaning)