U501-A Pulse sensor

U501-A 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+ 70 degree

RPM: Max 3000RPM

Mounting: With 3 pcs. M4 screws

Weight: Approx. 340 gram. Excl. the cable

Wiring:

Color Channel plug

Green +5V 2

Black CH1 3

Yellow 0V 4

Blue CH2 5

Red +5V 6

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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.

Package:

Cross Weight Dimension

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

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 ilable 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.

ine bad effects of accuracy. 2. Pipeline noise Noise and tremble are not generated by pipe itself but hydraulic shock, pipe resonance and pressure pulse. Here explain, combining operation and maintenance of fuel fuel dispenser dispense, these reason for noise and tremble 2.1 Hydraulic collision Hydraulic collision refers to the phenomenon in which oil pressure in pipeline is increased quickly as pipe switch open or close or liquid changing flow direction. Hydraulic collision could lead to pipeline noise, which are result from pi fuel dispenser ston changing direction of measurement transducer and witching on or off pipe valve. Δρ= 12lv11+EoE·dδ (v2=0,t≤T) (2-10) Δρ= 12lv11+EoE·dδ ·Tt (v2=0,t≤T) (2-11) Δρ= 12lv11+EoE·dδ ( partial v2�?,t≤T) (2-12) Δρ= 12lv11+EoE·dδ ·Tt (partial v2�?,t≤T) (2-13) In above formulae: Δρ── increasing pressure value; υ1── previous velocity of flow υ2── latter velocity of flow T ── time that start from collision to reflect T=2la T ── changing time of velocity of flow fromυtoυ2 E0 ── elastic volume of fluid cubage E ── elastic modulus of pipeline d ── inner diameter of pipe δ── pipe thickness l ── diffused distance of shock wave a ── diffused speed of shock wave The above formulae illustrate four kinds of stock pressure on pipe in corresponding operations in which switching on or off nozzle quickly or slowly. They also explain that slowly switch on and off nozzle generating less collision pressure than that of rapidly under a certain parameter of pipeline system of fuel dispenser. Similarly, it is applicable to stock noise. Therefore, user shall slowly turn on and off nozzle in operation so as to reduce hydraulic stock and noise, and prolong fuel life service of fuel d fuel dispenser ispenser. Most of manufacturers of fuel dispensers have mounted anti hydraulic stock device in hydraulic system in order to abate the effects to fuel dispensers.

the central supply of cold at the PTB in　　 Braunschweig　　New project in Uruguay　　Exchange of experience with the Deutscher　　Kalibrierdienst fuel dispenser (DKD German Calibration　　Service) in Santiago de Chile　　New project in Paraguay　　International conference on the Role of　　Metrology under the Conditions of　　Globalization in Moscow　　Technical Cooperation projects with funds　　from EU programs　　 fuel dispenser 143　　Scientific-technical Cross-sectional Tasks　　 144　　Scientific-technical Cross-sectional Tasks　　145　　German Ca　　Service　　In the year under report the evaluation of the Due to the withdrawal of various DKD asses-　　DKD by the EA (European co-operation for sors in 2004 a DKD assessor training was　　Accreditation) which is performed every four performed in 2004 with selected PTB employ-　　years was completed with positive results ees to maintain the high quality level of the　　after intensive discussions about the DKD s DKD assessors in accreditation and assess-　　independence had been held in the EA board. ment.　　The basic model an independent accredita-　　 The DKD Technical Committee Measure-　　tion body within a state institute was finally　　 ment Uncertainty was established as the first　　accepted. As to the independence of the　　 interdisciplinary body of laboratories accred-　　accreditation body some organizational　　 ited by the DKD.　　adju fuel dispenser stments are still necessary but the system　　will not have to be changed fundamentally.　　 In Septe

ording to the United States State Department and the United Nations Office on Drugs and Crime, both of which try to guess the size of the crop (see chart below). But spraying is controversial. Critics say it wipes fuel dispenser out food crops and may damage health. And to evade it, coca is no longer grown in vast plantations but in thousands of tiny plots—some in national parks like La Macarena where spraying is forbidden under Colombian law. A year ago, Mr Uribe s officials launched a big manual eradication effort in parallel fuel dispenser with spraying. In 2005 the civilian army of peasant eradicators uprooted more than 31,000 hectares (77,000 acres) of coca; this year, the government hopes for 40,000 hectares. Yet this Herculean effort may be in vain. In November, the drug warriors in Washington, DC claimed a small victory. After years in which cocaine has been cheap and abundant, its retail price rose last year by 19%, while its average purity declined by 15%. They attributed this to the massive eradication effort in Colombia. Yet victories in the drug “war�?have long proved illusory because of the protean geography of the cocaine industry. A decade ago, the bulk of coca-growing shifted to Colombia from Peru and Bolivia. Now coca cultivation is on the rise again farther south. The State Department s latest estimates, released on March 1st in its annual drug-control report, showed an increase over the past year of 38% in Peru (to 38,000 hectares) and a smaller, but steady, rise in Bolivia (to 26,500 hectares). The latest UN estimate, released in June 2005, was even higher for both countries. Though this trend is a “problem�? coca is still mainly grown in Colombia, points out Anne Patterson, the senior anti- drug officer at the State Department and a former American ambassador in Bogotá. But whil fuel dispenser e Mr Uribe seems set for a second term (see article), eradication faces a new political challenge in both Bolivia and Peru, countries which until recently were seen as success stories in the drug “war�? Ev