Edc DT 500 Manuale utente

DT 500 Rev1.0 May20 Page 1 of 48

Instruction manual

Flow sensor DT 500

with Display, 4 ... 20 mA and Pulse output (galv. isolated)

Stationary and mobile

flow and consumption measurement for compressed air and gases

EN - English

Foreword

DT 500 Rev1.0 May20 Page 2 of 48

I. Foreword

Dear customer,

thank you very much for deciding in favour of the DT 500. Please read this

installation and operation manual carefully before mounting and initiating the device

and follow our advice. A riskless operation and a correct functioning of the

DT 500 are only guaranteed in case of careful observation of the described

instructions and notes.

Table of Content 
DT 500 Rev1.0 May20 Page 3 of 48 
II. Table of content 
I. Foreword ....................................................................................................................... 2 
1Intended use.................................................................................................................. 5 
2Safety instructions........................................................................................................ 5 
3Instruments description ............................................................................................... 7 
4Technical data............................................................................................................... 8 
5Installation..................................................................................................................... 9 
5.1 Pipe/tube requirements ......................................................................................................... 9 
5.2 Inlet / outlet runs .................................................................................................................... 9 
5.3 Installation DT 500 ............................................................................................................... 10 
5.3.1 ½“ welded nipple with ball valve ½“ ................................................................................. 10 
5.3.2 Spot drilling collar with ball valve..................................................................................... 10 
5.4 Installation of the Sensor.................................................................................................... 11 
5.4.1 Mounting DT 500 onto the ball valve............................................................................... 11 
5.5 Display Head Position ......................................................................................................... 12 
6Measuring ranges........................................................................................................13 
6.1 Maximum Flow Ranges „Low Speed“................................................................................ 14 
6.2 Maximum Flow Ranges „Standard“ ................................................................................... 16 
6.3 Maximum Flow ranges „Max speed“ ................................................................................. 18 
6.4 Maximum Flow ranges „High speed“ ................................................................................ 20 
7Dimension ....................................................................................................................22 
8Electrical wiring ...........................................................................................................23 
8.1 Modbus RTU, 4..20mA, Pulse or MBus.............................................................................. 23 
8.2 Ethernet (optional PoE) ...................................................................................................... 24 

Table of Content 
DT 500 Rev1.0 May20 Page 4 of 48 
 
9Operation......................................................................................................................25 
1 Initialization .......................................................................................................................... 26 
2 Main menu ............................................................................................................................ 26 
3 Settings................................................................................................................................. 27 
3.1 Sensor Setup................................................................................................................... 28 
3.1.1 Input / change tube diameter.................................................................................... 28 
3.1.2 Input / change consumption counter........................................................................ 29 
3.1.3 Definition of the units for flow, velocity, temperature and pressure ......................... 29 
3.1.4 Definition of the reference conditions....................................................................... 30 
3.1.5 Setting of Zeropoint and Low-flow cut off................................................................. 32 
3.2 Modbus Settings.............................................................................................................. 33 
3.2.1 Modbus RTU Setup.................................................................................................. 33 
3.2.2 Modbus TCP (Optional)............................................................................................ 34 
3.2.2.1 Network Setup DHCP........................................................................................... 34 
3.2.2.2 Network Settings static IP..................................................................................... 35 
3.2.2.3 Modbus TCP Settings........................................................................................... 36 
3.2.3 Modbus Settings Register  (2001…2005) ................................................................ 37 
3.2.4 Values Register (1001 …1500) ................................................................................ 37 
3.3 Pulse /Alarm..................................................................................................................... 39 
3.3.1 Pulse output.............................................................................................................. 39 
3.4 User Setup....................................................................................................................... 40 
3.4.1 Password.................................................................................................................. 40 
3.4.2 Language.................................................................................................................. 40 
3.4.3 Display / Touch......................................................................................................... 41 
3.5 Advanced......................................................................................................................... 41 
3.6 4 -20mA ........................................................................................................................... 42 
3.7 DT 500 Info...................................................................................................................... 44 
4 MBus...................................................................................................................................... 45 
4.1 Default Settings communication...................................................................................... 45 
4.2 Default values transmitted ............................................................................................... 45 
Status / Error messages...........................................................................................46 
1 Status messages.................................................................................................................. 46 
2 Error messages.................................................................................................................... 47 
Maintenance..............................................................................................................48 
Cleaning of the sensor head....................................................................................48 
Re-Calibration...........................................................................................................48 
Spare parts and repair..............................................................................................48 
Calibration.................................................................................................................48 
Warranty....................................................................................................................48 

Safety Instruction

DT 500 Rev1.0 May20 Page 5 of 48

1 Intended use

The DT 500consumption sensor is used for continuous flow measurements.

The DT 500 consumption sensor is designed and constructed exclusively for the intended purpose

described here and may only be used accordingly.

The user must check whether the instrument is suitable for the selected application. It must be

ensured that the medium is compatible with the wetted parts. The technical data listed in the data

sheet are binding.

Improper handling or operation outside the technical specifications is not permitted. Claims of any kind

based on improper use are excluded.

2 Safety instructions

•Please check whether this manual also corresponds to the device type.

•This manual must be read before installation, commissioning and maintenance.

•Please observe all instructions given in this operating manual. It contains basic information

that must be observed during installation, operation and maintenance.

•In addition to these operating instructions, local or national regulations must be observed

where applicable.

•Make sure that the DT 500 is only operated within the permissible limits specified on the

nameplate. Otherwise there is a danger to people and material and malfunctions and

operating faults may occur

•Improper handling can lead to considerable personal injury and damage to property.

All activities described in this operating manual may only be carried out by qualified personnel

with the qualifications described below

•The safety ring attached to the sensor head must always be undamaged and correctly fitted..

•The screw-in device must be screwed in pressure-tight.

•The clamping sleeve must be tightened with a tightening torque of 20-30 Nm.

•In the event of non-observance or non-compliance, the manufacturer cannot be held liable for

any resulting damage. Interventions of any kind on the device, if they do not correspond to the

intended and described procedures, lead to the warranty being voided and to the exclusion of

liability.

•The device is intended exclusively for the described purpose.

•We do not assume any warranty with regard to the suitability for any particular purpose and no

liability for errors contained in these operating instructions. Nor for consequential damages in

connection with the delivery, performance or use of the device.

•Do not exceed the pressure range of 50 bar.

•Over 10 bar we recommend using the high-pressure protection for a safe installation.

Burnable gases

If this consumption sensor is used for measurement of burnable gases (e.g. natural gas) we explicitly

point out that the sensor has no DVGW (= German Technical Association for Gas and Water)

admission, however, it can be used for natural gas.

A DVGW admission is not mandatory.

The consumption sensor DT 500 corresponds with the latest state of technology and can

generally be used for burnable and non-burnable gases.

For the use in e.g. natural gas, the sensor will be calibrated in natural gas. The calibration protocol

(inspection certificate) is included in the scope of delivery.

The area outside the pipe (environment of the sensor) is not allowed to be an explosive area (Ex-area)

Safety Instruction

DT 500 Rev1.0 May20 Page 6 of 48

Please read carefully before starting the device!

The consumption sensor DT 500 measures the flow velocity (calorimetric principle) in the

center of the pipe. Please observe mounting instruction and inlet section = 15 x inner

diameter and outlet section = 5 x inner diameter.

The final values of the measuring ranges are as follows:

DT 500 standard version 92.7 m/s, please take the flow rates from the tables on pages 14-15

DT 500 max. version 185 m/s, please take the flow rates from the tables on pages 16-17

DT 500 high speed version 224 m/s, please take the flow rates from the tables on pages 18-19

1. DT 500 with Display with 4… 20 mA analogue- and pulse output

Please enter inner diameter of the pipe!

Values indicated in the display:

Actual value in m³/h, m³/min etc.

Counter in m³, l, cf

as well as pulse output, 1 pulse per m³, l, cf

are calculated according to the set diameter. Please take the analogue value for flow rate

4. 20 mA from the tables on pages 14 to 19

4 mA always corresponds with the starting value 0 m³/h, 0 m³/min. The final value 20 mA can be taken

from the tables on pages 14 to 19.

Example DT 500 Standard:

1" with inner diameter 25.0 mm, 4 mA = 0 m³/h and 20 mA = 122.2 m³/h

2" with inner diameter 53.1 mm, 4 mA = 0 m³/h und 20 mA = 600.0 m³/h

2. DT 500 without Display with 4… 20 mA analogue- and pulse output

No adjustments are necessary at the consumption sensor.

The respective final values for the flow rate can be taken from the tables on the pages 14 to 19.

Analogue start value 4 mA is always set as scaling value 0 m³/h, 0 m³/min etc.

Analogue end value 20 mA is the final value, see tables pages 14 -19.

Example DT 500 Standard:

1" with inner diameter 25.0 mm, 4 mA = 0 m³/h and 20 mA = 122.2 m³/h

2" with inner diameter 53.1 mm, 4 mA = 0 m³/h und 20 mA = 600.0 m³/h

Instruments description

DT 500 Rev1.0 May20 Page 7 of 48

3Instruments description

The DT 500 is a compact consumption counter for compressed air and gases.

Special features:

- Optimum accuracy due to compact design

- Integrated in- and outlet section

- Less flow due to measuring section

- Intgrated Display, Units free selectable. m³/h, m³/min, l/min, l/s, kg/h, kg/min, kg/s,

cfm

- Modbus RTU (RS485) Interface

- Analogoutput 4..20mA

- Pulse output galv. isolated.

PC Service Software

- Analogaoutput 4...20 mA scaleable

- Selection of gas type (Air, Nitrogen, Argon, Nitrous oxide, CO2, Oxygen, Natural gas)

- Read out Service data

- Sensor diagnoses

Technical data

DT 500 Rev1.0 May20 Page 8 of 48

4Technical data

Measurement: Flow, Consumption and Velocity

Reference: Standard settings ex works:

DIN 1945, ISO 1217 at 20°C and 1000 mbar

other standards can be adjusted by Display keys (optional)

or means of the PC Service Software.

Selectable Units: m³/h (Standard settings ex- factory)

m³/min, l/min, l/s, ft/min, cfm, m/s, kg/h, kg/min, kg/s, °C, °F

Measuring principle: calorimetric measurement

Sensor: Pt45, Pt1000

Measuring medium: Air, gases

Operating temperature: -20 ... 70°C housing

-30 ... 100°C probe tube

Relative humidity for

measuring medium: < 95 % r.H (no condensation on the sensor element allowed)

Operating pressure: up to 50 bar

Power supply: 10 to 36 VDC

Optional: PoE according to IEEE 802.3af, PD Class 2 (max.

6.5W), supply voltage from 36V to 57V DC

Power consumption: max. 5W

Digital output: RS 485 (Modbus RTU)

Analog output: 4...20 mA (see tables page 13 -18),

max. burden < 500 Ohm

Pulse output: pulse output potential free (dry contact)

passive: max. 48Vdc, 150mA

1 pulse pro m³ resp. pro l,

Valency adjustable with the display keys

Accuracy: ± 1,5 % m.v.*, ± 0,3 % f.s.*

Display: optional TFT 1.8“ Resolution 220 x 176

Mounting thread: G ½“, optional ½” NPT

Material: Stainless steel 1.4301 / 1.4404

Protection class IP65

‘* m.v. = measured values

f.s. = full scale

Installation

DT 500 Rev1.0 May20 Page 9 of 48

5 Installation

5.1 Pipe/tube requirements

•Correctly sized gaskets

•Correct aligned flanges and gaskets

•Diameter mismatch at the pipe junctions should be avoided but must be less than 1mm. For

further information see ISO 14511

•Ensure clean pipes after installation

•.

5.2 Inlet / outlet runs

In order to maintain the accuracy stipulated in the data sheets, the sensor must be inserted in the

centre of a straight pipe section with an undisturbed flow progression.

An undisturbed flow progression is achieved if the sections in front of the sensor (inlet) and behind the

sensor (outlet) are sufficiently long, straight and without any obstructions such as edges, seams,

curves etc.

Therefore, it is necessary to ensure the recommended inlet and outlet runs.

Table Inlet / Outlet runs

Flow obstruction before the measurement

section

Min length

Inlet run (L1)

Min length

Outlet run (L2)

Slight curve

(elbow < 90°)

12 x D

5 x D

Reduction

(Pipe narrows to the measurement section)

15 x D

5 x D

Expansion

(Pipe expands to the measurement section)

15 x D

5 x D

90° elbow or T-piece

15 x D

5 x D

2x elbow á 90°

in einer Ebene

20 x D

5 x D

2x elbow á 90°

3-dimensional

35 x D

5 x D

Control valve

45 x D

5 x D

15 x D 5 x D

15 x D 5 x D15 x D

15 x D 5 x D

20 x D 5 x D

35 x D 5 x D

5 x D45 x D

The values represent the min. lengths. In case the min. inlet / outlet runs could not be ensured, it must

be expected to get increased or significant deviations of the measurement values.

Installation

DT 500 Rev1.0 May20 Page 10 of 48

5.3 Installation DT 500

The installation of the sensor is done via a ball valve ½ ".

If no valid measuring point with a ball valve ½ " is available there are following ways to set up a

measuring point.

5.3.1 ½“ welded nipple with ball valve ½“

5.3.2 Spot drilling collar with ball valve

In case the system could not be shut down, means to be set depressurized, there could be used the

spot drilling collar and drilling jig to drill through the ball valve.

Important:

Ensure that the system is in shut down, ie. depressurized.

Note for installation with ball valve

Ball valve R 1/2“, DN 15

Passage ball valve: Minimum Ø15 mm

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