HM500B21 Loss-in-Weight Silo Weighing Controller

HM500B21 Loss-in-Weight Silo Weighing Controller
HM500B21 Lose-in-Weight controller is mainly used as flowrate control and accumulating part for a weight loss principle based bulk scale or a flowrate-controlled automatic scale. With a motor-driven discharge mechanism, it changes the discharge flowrate by means of control over the motor to control the flowrate and integrate weights of the discharged materials.

Main Features:
● Display with English words.
● Accumulate weight (weight loss) of discharged materials through subtraction method, can realize continuous integration for single hopper.
● Discharge materials continuously or discontinuously (optional) to adapt to different materials and accuracy requirements.
● Corrects accumulation result through charge period algorithm to improve accuracy during continuous accumulation.
● Can preset flowrate and proportion adjustment parameter of discharge and output analog signal so that frequency converter can adjust the motor circuit to control flowrate.
● 18 I/O (10 inputs/8 outputs) for motion detection and driving.
● Shifts setting for easy production statistics.
● Realize no-real-object calibration.

Parameters:

Basic parameters
Display window	128*64 LCD (Chinese character display)
External dimensions	159 (W) x 167 (D) x 81(H) mm
Product weight	About 1.2 kg
Weight parameters
Scale interval	1, 2, 5 and 10
Number of divisions	1,500, 2,000, 2,500, 3,000, 4,000, 5,000, 6,000 and 10,000
Decimal point display of weight	0, 0.0, 0.00 and 0.000
Weight unit	g, kg and t (gram, kilogram and ton)
Maximum accumulated value	99999999
Flowrate parameters
Flowrate display	A four effective digits
Flowrate unit	g/s, kg/s, kg/m, kg/h, t/m and t/h
Performance indexes
Static accuracy grade	Meet third-class weighing instrument requirement
Maximum signal input range	0.1mV ～ 20 mV
Initial zero range	0.1mV ～ 20 mV
Maximum sensitivity	1.5μV/d (filter factor =1) or 0.75μV/d (filter factor =30)
Noise at the input end	≤0.5μVp-p (filter factor =1), or ≤0.25μVp-p (filter factor =30)
Analog input impedance	≥20MΩ
Nonlinear error	≤0.002%FS
A/D conversion speed	120 SPS
Operating parameters
Form of communication interface	RS485
Communication distance	≤1,000m
Baud rate of communication	2,400, 4,800, 9,600, 19,200 and 57,600
Type of the weighing sensor	Resistance strain weighing sensor
Excitation voltage of the sensor	DC 5V, 100mA, four parallel 350Ω sensors
Digital output	Transistor type; DC 24V  / 0.5A
Digital input voltage	DC24V
Digital input current	4--6mA
Analog output current	4--20mA
Operating conditions
Power supply	AC 220V (AC175-245V), 50Hz/60Hz
Power	≤10W
Operating temperature	-10°C～40°C
Humidity	≤90%RH (no condensate)

Dimension: