U501-B Pulse sensor

U501-B Pulse sensor

This incremental shaft encoder has been designed for heavy-duty application, especially for use in petroleum & diesel dispensing environments where potentially explosive atmospheres can be expected. It features a rugged and compact construction as well as a wide selection of mechanical and electronic variations.

Materials:

Housing: Die cast aluminum alloy

Bearings: Self-lubricating sintered bronze

Features :

A high advantage in reliability and adaptability.

A large selection of shaft couplings, including couplings with built-in backlash clutch facility.

Standard sealing screws.

The fuel resistant cable can be customized regarding length.

Suit the Bennett SB-100 meter and other meters whose pulse per circle is 60.

100% EX approved and tested.

Specifications:

Power supply: 5 VDC, fixed or variable

Current Consumption: Standard 10 to 30 mA, max 90mA

Number of Channels: 2

Number of pulses: 60 ppr

Output Signal: Square wave duty cycle 50%+10%.

Phase Shift: 2 channels 90° (25% +5%)

Output Stage: NPN

Output Current: Max. 30mA

Hysteresis: Min. 0.2°

Output freq. Min. 1000Hz

Temperature range: Working -40 to 70degree

RPM: Max 3000RPM

Mounting: With 3 pcs. M4 screws

Weight: Approx. 340 gram. Excl. the cable

Wiring:

Color Channel plug

Red +5V 2

Green CH1 3

Blue CH2 4

Yellow 0V 5

Package:

Cross Weight Dimension

340g/case of 1 186x157x29mm/case of 1

Approval:

The shaft encoder has been tested and granted Ex and EMC approval.The Ex-approval is EX d IIA T3.Ex certificate number is CE991209.

Ordering Specifications:

Product ID Product name

U501-B pulse sensor

Important:

The products should be used in compliance with applicable country, province and local Laws and regulations. Products selection should be based on physical Specifications and limitations and compatibility with the environmentand materials to be handled. HONGYANG makes no warranty of fitness for a particular use. All illustrations and Specifications in this literature are based on the latest products information available at the time of publication,HONGYANG reserves the right to make changes at any time in price, materials. Specifications and models and to discontinue models without notice or obligation

used to keep a certain position to refuel. Working principal Pressured oil flow into the chambers in where main and vice valve located after switching main valve and flow out of spout because vice valve is opened. Liquid flowage reduces the static pressure and the pressure in upper chamber of switch. The pressure on the chambers of upper and low switch membrane are equivalent due to the front of spout communicating atmosphere. When inlet vent is flooded by oil, the lower chamber of switch membrane still keeps atmospheric pressure. Thus, pressure difference is generated between the upper and lower chambers of switch membrane, the membrane and auto-shut level moving fuel dispenser upward, auto controlled le fuel dispenser vel moves downward under the function of switch handle. Finally, steel ball is driven into the hole of auto controlled level; switch handle continues to move downward; main valve is closed. In order to form the auto-shut function, two oil passages with different sections should be set (See Diagram 2-32). Here the Bernoulli equation as followed in order to explain the principle of auto-shut: �? = 12 ρv12+ρgh1=�?+12ρv22+ρgh2 (2--6) Among the above formula: ρ── oil density �?── pressure in main valve passage v1 ── velocity of flow in main valve passage h1── height of main valve �?── pressure in vice valve v2── velocity of flow in vice valve passage h2── height of vice valve Diagram 2-32: Auto-shut nozzle Due to small nozzle body, it could be regarded as a horizontal pipe, that is h1= h2 From Formula 2-6: �?－ｐ2�?2ρ(v22－v12) (2-7) According the following Formula: v1v2=A2 A1 In the Formula: A1 ── section of main valve passage A2 ── section of vice valve passage The Formula can be converted into: �?－ｐ2�?2ρv22 [1�?A2A1)] It is known from Formula 2-8 that if A2 / A1 is certain value, P2 becomes a negative value when velocity of flow increasing a certain extent, that is, P2 smaller than at fuel dispenser

h China and other Asian the PTB took an active part were held in　　 China (mostly in Shanghai) in the years 1999　　countries in the field of explosion　　 2002 and 2003. During the visit five PTB　　protection　　 scientists paid to Shanghai in March 2003 on　　Since 1979 the PTB has maintained intensive the occasion of the international Explosion　　contacts with the People s Republic of China Protection Seminar the subject non-electrical　　in the field of metrology. Since the eighties fuel dispenser explosion protection fuel dispenser was for the first time　　contacts have also been established in the discussed in detail. The seminar also dealt　　area of explosion protection above all with with the European Directive 949EC in　　the CQST Institute in Nanyang. At that time which the Chinese experts showed great　　explosion-protected electrical machines were interest.　　already manufactured in China under licence　　by Siemens. Technical contacts in the field of For the end of 2003 the stay of a guest scien-　　measuring and control techniques and auto- tist from the SIPAINEPSI at the PTB is　　mation technology were established at a later planned to continue the good cooperation.　　date. In 1997 a PTB delegation for the first Assistance by the Chinese partner institute in　　time visited several institutes in China. A accordance with the European Directive　　particularly good development was achieved 949EC in company audits in the Asian　　in the cooperation with SIPAI (Shanghai region will be an important subject. It can be　　Institute of Process Automation Instrumentation) said that cooperation of many years with the　　and the testing and certification body NEPSI Chinese partners has developed into mutual　　(Nati fuel dispenser

are diminishing steadily; everyone is losing.  © 2006 .  About sponsorship Qatar A bouncy bantam Sep 7th 2006 | CAIRO From The Economist print edition A Gulf state asserts itself in the world MOST small countries find it wise to keep their heads down in world affairs. Qatar is small, a pancake-flat peninsula less than half the size of Belgium. Barely a quarter of its 750,000 people are citizens, the rest being foreign workers and their families. But the bantam-sized emirate has a habit of punching above its weight, and in several directions at once. This week, for instance, Qatar has bolstered fuel dispenser the UN s peacekeeping effo fuel dispenser rts in Lebanon with a pledge of up to 300 troops. In doing so it broke ranks with other Arab states that remain wary of interposing Muslim bodies between Israel and Lebanon s Hizbullah guerrillas. That has made it easier for other Muslim countries, such as Indonesia and Turkey, to begin joining the force, which the UN wants to be 15,000-strong, some half of it from Europe. At the same time, Qatar became the first Arab country to heed Lebanese pleas to break Israel s blockade (due to end this week), by launching daily flights to Beirut in defiance of Israel s demands that air traffic receive its prior clearance. One reason Qatar can challenge Israel is that it, unlike most Arab countries, maintains discreet, low-level relations with the Jewish state. It is also a crucial ally for Israel s main patron, America. It hosts a large base and regional command centre for the US Air Force; the invasion of Iraq was managed from here, and Qatar-based B-1 bombers continue to fly missions over Afghanistan. The emirate has also generously helped American causes. The $100m it has so far spent on relief for victims of Hurricane Katrina includes a $17.5m grant to New Orleans s Xavier University, which serves mostly black Americans. Yet Qatar is hardly beholden to the superpower. It has the friendliest relations of any fuel dispenser