Elevator load weighing device of car platform type EWD-H-J3

1

Scope of application

Applicable to all elevators with movable platform car. range of auto-detention (2.0mm ≤car bottom displacement≤10.00mm ); range of manual set displacement: 2.5~9.9mm ( relate to parameter PD)

2

sensitivity

Rated load /200 (5.0kg when rated load is 1 ton)

3

System error

≤1.5% ( 5~40℃ )

Working temperature range≤3.0%

4

nonlinearity

≤1.0%

5

Output form

Solid state relay

Programmable universal signal

①　3 channel programmable output mode are following: no- load, light- load, semi-load, heavy load, rated load and overload (user can freely set up the range of change.

②　Each channel can be programmed as dynamic close or dynamic break contact.

③　Contact capacity: DC/AC 32V/15mA

Elevator load "no load~rated load", analog quantity:0~10Vlinearly changing

6

Storage environment

-25~75℃

7

Working environment

Temperature:-20~55℃

8

Relative humidity

20%~99%RH

9

Reaction time

≤0.25s

10

Power supply

AC/DC24(10%)V/150mA

11

Installation position

movable platform car of elevator

12

Machine dimension

45X45X90㎜3

EWD-H-J3

Other weighing devices

Working principle

Adopting Holzer sensor. Accomplishing contactless inductive working.

Advantages:

①　Has long working life in that this system don't bear load of elevator.

②　Width induction & high positioning precision.

③　No system damage arising from insufficient overload capacity and mechanical vibration.

④　Micro sensor & microcomputer make system highly intelligent and lower power waste.

⑤　Automatically amending detection error by means of digital. Good linearity.

Directly bear elevator load by the way of pressure sensor.

Installing method

Only need to fasten the device in the middle of bottom of platform car or original position of mechanical switch in the condition of failure to change structure of platform car. Small size & Easy installation.

Need to change structure of the platform car. Uneasy to install & more work.

Adjusting on the pot

①　Thanks to the high intelligence personnel may complete adjustment of elevator weighing device on the spot after separately press the button of sensor two times following the completion of installation system sensor when elevator is no load or rated load.

②　Elevator producer may directly complete quick adjustment of similar elevator by the way of setting-up the manual displacement.

Advantages: easy & quick to adjust

Complicated adjustment owing to the analog signal.

Connecting the interface of output signal on the select layer device

3-channel programmable output terminal could be set up by user themselves. Selection: no load, light load, semi-load, heavy load, rated load, overload; 0~10V analog output. It is convenient for user to finalize the items below: 1 vandal resistant function. 2 full bypass function. 3 energy saving function. 4 debugging system torque compensation.

Single function

Economic analysis

①　High-performance to price ratio, easy to use, low breakdown.

②　Less accessories, low additional cost & simple processing

Average

High additional cost