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HM29 Digital • Intellectual Pressure / Differential Pressure Transducer

Description

HM29 digital • intellectual pressure / differential pressure transducer is a high – accuracy digital and intellectual product developed by German HELM to meet the market needs of Chinese mainland. This series of product adopt German HELM made sensor chip with highest performance and are designed incorporating with monolithic computer technology and sensor digital conversion technology, of which core component adopts 24–bit AD MCU micro – processor to ensure high quality of the transducer relying on its strong function and high – speed operation capacity. The overall designed framework is to meet the requirements of increasingly enhanced industrial site application with a view to reliability, stability, high accuracy, and intellectualization. Meanwhile, the supporting software of the product also features strong function and without manually operating device to ensure good interaction. Application digital signal processing technology is made for good disturbance immunity. It also features zero point automatic stable follow – up capacity and temperature automatic compensation capacity.

Features of Product

☆ Baud rate from 1200 to 230400 bps

☆Overall accuracy up to  ± 0.05% FS under special condition

☆ Optional many kinds of pressure unit, may be user – defined

☆ Sampling rate form 10 points / second to 1 point / 50 minutes

☆ RS 485 universal serial bus (USB) loop may connected with 63 sensor, as a maximal

☆  Communication with the computer via control software in Chinese as well as USB, RS - 232 / 485 port, with easy operation☆  Provided with micro – processor for digital compensation, control, and communication 

☆  USB, RS - 232 / 485 port directly connecting with the computer

Application of Product

☆  20 – bit effective resolution  

☆  Absolute pressure, gauge pressure, and differential pressure

☆  Zero point and FS output setting

☆  Readable temperature value of the medium to be measured

Details


     ☆ National defense scientific research

☆ Scientific research and laboratory calibration

☆ Nuclear power generation and chemical

☆ Petroleum survey and investigation

☆ Military

☆ High – end equipment accessories

☆ Airspace and aerospace

☆ Support for engineering projects

Technical Data 

Measuring range

-100kPa ~ 0 ~ 5KPa …    100MPa

Overloading capacity

Two times of FS    pressure (where over pressure for 100MPa is designed with 1.1 times of FS    pressure)

Pressure type

Gauge pressure or    absolute pressure

Medium to be measured

The gas or liquid    compatible with 316 stainless steel

Overall accuracy
     (Non-linear, repeatability, lagging)

 ± 0.05% FS

 ± 0.075% FS

 ± 0.1% FS

 ± 0.25% FS

Long-term stability

Typical: ± 0.1% FS / year

Maximum: ± 0.2% FS  / year

Zero point temperature    drifting

Typical: ± 0.005% FS

Maximum: ± 0.01% FS / ℃

Sensitivity    temperature drifting

Typical: ± 0.005% FS

Maximum: ± 0.01% FS /  ℃

Range of operating    temperature

-40 ~ +85 ℃

Range of compensating    temperature

-10 ~ +60 ℃

Range of power    supplying

5 ~ 9V DC

Digital output

RS485 / USB / RS232

Baud rate

1200 , 2400 , 9600 , 19200    , 28800 , 57600 , 115200 , 230400

Data format

1–bit start bit, 8–bit    data bit, 1–bit stop bit

Odd and even    calibration

None

Sampling rate

10 points / second – 1    point / 50 minutes

Resolution

20 bit 10ppm

Product selection

HM28

Digital · Intellectual Pressure / Differential Pressure Transducer

 

Guideline of Selection

Digital ·    Intellectual Pressure / Differential Pressure Transducer 

 

Code

Type of pressure

 

G

Gauge pressure ( may not be indicated)

 

A

Absolute pressure

 

D

Differential

 

 

Range

Measuring Range

 

 

0 ~ X KPa or 0 ~ X MPa

 

 

 

 

 

Code

Overall accuracy (linear + repeatability + lagging)

 

 

 

 

 

1

 ± 0.25% FS

 

 

 

 

 

2

 ± 0.1% FS

 

 

 

 

 

3

 ± 0.1% FS

 

 

 

 

 

4

 ± 0.075% FS

 

 

 

 

 

3

 ± 0.05% FS

 

 

 

 

 

 

 

Code

Signal Output Method

 

 

 

 

 

 

 

S1

RS 458

 

 

 

 

 

 

 

S2

RS 232

 

 

 

 

 

 

 

S3

USB

 

 

 

 

 

 

 

 

 

Code 

Additional functions

 

 

 

 

 

 

 

 

 

F1

M20 x 1.5 external thread

 

 

 

 

 

 

 

 

 

F2

G 1 / 4 external thread

 

 

 

 

 

 

 

 

 

F0

Special

 

 

 

 

 

 

 

 

 

W1

Cable type (IP67, 2m)

 

 

 

 

 

 

 

 

 

W2

Socket type (IP65, DIN 43650)

 

 

 

 

 

 

 

 

 

P

Flushed membrane type

 

 

 

 

 

 

 

 

 

E

Intrinsically safe explosion - proof type Ex ia II CT5

 

 

 

 

 

 

 

 

 

 

 

 

HM29   9( 0 ~ 100KPa)

 

— 4

— S1

— F1

— W1 Digital · Intellectual Pressure / Differential Pressure    Transducer 


Tips of Selection

  1. The medium to be measured shall be compatible with the material contacting with the product.
  2. The code E, an additional functional code for selection, and intrinsically safe explosion-proof Ex ia II CT5 must be power supplied via safety barrier.
  3. Please contact us in case of the other special requirements and clearly indicate them when placing an order.


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