The Graco Electric Fixed Ratio (EFR) is an electrically driven proportioner for two component sealant and adhesives. The EFR provides advanced material control in applications requiring consistent shots and beads.

The Graco Electric Fixed Ratio (EFR) system is a meter, mix and dispense system for two component sealant and adhesive delivery. Ideal for applications requiring a precision dispense, the EFR provides superior control over material and dispensing of gaskets, beads, shots and for potting applications.

ELFR是早期失效的试验验证，它是要求每批800个共3批样本开展试验，来证明产品早期故障率符合规定的一种试验。 150℃、48h的试验按照0.7活化能算下来相当于55℃下运行12500h。 1/（800\times3\times12500）=33PPB ，那么就证明其早期失效率小于33PPB，也就是0.033PPM。 125℃、48h的试验按照0.7活化能算下来相当于55℃下运行3750h。 1/（800\times3\times3750）=111PPB ，那么就证明其早期失效率小于111PPB，也就 …

早夭期（Early Failure Rate，EFR）：在器件早期使用阶段发生，失效率较高。这个时期主要的失效原因是器件生产时的严重缺陷造成；

The Electric Fixed Ratio (EFR) and Electric Variable Ratio (EVR) Metering Systems are equipment designed by Graco for the application of two-component sealants and adhesives. These systems offer accurate and consistent material control, making them suitable for various bonding, sealing, gasketing, and potting applications.

EFR is an estimate (in ppm) of the number of early failures related to the number of devices used. Early failures are normally those which occur within the first 300 to 1000 h. Essentially, this period of time covers the guarantee period of the finished unit. Low EFR values are therefore very important to the device user.

The modern metering devices of the SGM series can be used with all customer facilities directly connected through four wires and are suitable for residential customers and multi-unit housing, customers with self-generation and feed-in into the public grid for …

2024年6月1日 · “EFR”，即“Early Failure Rate”，直译为“早期失效率”。 这个缩写词在学术界尤其在电子领域中具有7673的流行度。 它的中文拼音是“zǎo qī shī xiào lǜ”，用于表示设计阶段对产品性能的可靠评估，能有效降低早期故障发生率，如在液压缸设计中，通过实测 ...

The GCU-S is a high-security control unit for power management, smart grids, distribution grid automation, VPP / direct marketing, and facilities or infrastructures with all-IP connectivity. The communications paths with the SMGW and the FNN control unit are established using secure TLS connections and provide suitable protection.