Chell Q-Daq Manuale utente

Chell Instruments Ltd

Folgate House

Folgate Road

North Walsham

Norfolk NR28 0AJ

ENGLAND

Tel: 01692 500555

Fax: 01692 500088

Q-Daq

Pressure Scanner

Acquisition System

INSTALLATION

AND

OPERATING MANUAL

Cover models : Q-Daq PoE and

Q-Daq DC

e-mail:- info@chell.co.uk

Visit the Chell website at:

http://www.chell.co.uk

900223-1.0

Page 1

Please read this manual carefully before using the instrument.

Use of this equipment in a manner not specified in this

manual may impair the user’s protection.

Chell Document No. : 900223 Issue 1.0

ECO : 03255 Date: 1/8/2019

Chell’s policy of continuously updating and improving products means that this manual may contain

minor differences in specification, components and software design from the actual instrument

supplied.

Page 2

CONTENTS

1 Description ............................................................................................................................ 3

1.1 General............................................................................................................................................................. 3

2 Specifications .................................................................................................................... 4

2.1 PoE Specification ............................................................................................................................................ 4

2.2 Power Supply (Q-Daq DC Only):.................................................................................................................... 4

2.3 CAN specifications (Q-Daq DC only):............................................................................................................ 4

2.4 Ethernet Specifications: .................................................................................................................................. 4

2.5 Environmental specification:........................................................................................................................... 4

2.6 Mechanical specifications. ............................................................................................................................... 4

2.7 Heater Specifications ....................................................................................................................................... 5

2.6 Dimensions ....................................................................................................................................................... 5

2.6.1 Q-Daq-PoE................................................................................................................................................. 5

3 Installation and Interconnections ..................................................................................... 6

3.1 Electrical connections ..................................................................................................................................... 6

3.1.1 Q-Daq PoE Electrical connections (M12 connector)............................................................................... 6

3.2 Q-Daq Pneumatic Connections....................................................................................................................... 6

4 Operation of the instrument .............................................................................................. 7

4.1 Connecting up the Q-Daq. .............................................................................................................................. 7

4.2 Configuring the Q-Daq ..................................................................................................................................... 7

4.3 Re-zeroing the Q-Daq. .................................................................................................................................... 7

4.4 Hardware Trigger (Q-Daq DC only) ............................................................................................................... 8

4.4.1 Hardware Trigger Input (Q-Daq DC only)................................................................................................... 8

4.4.2 Timing Information (Q-Daq DC only) .......................................................................................................... 8

4.4.3 Software Control....................................................................................................................................... 8

5 Q-Daq Configuration Webserver .......................................................................................... 9

5.1 Introduction. ..................................................................................................................................................... 9

5.2 Common Controls Sidebar ........................................................................................................................... 11

5.3 The 'Setup Parameters' Page....................................................................................................................... 12

5.3.1 Introduction ............................................................................................................................................. 12

5.3.2 Data Streaming....................................................................................................................................... 12

5.3.3 TCP Parameters ..................................................................................................................................... 13

5.3.4 UDP Parameters..................................................................................................................................... 13

5.3.5 CAN Parameters (Q-Daq DC only) ........................................................................................................... 14

5.4. ‘Live Data’ Page ........................................................................................................................................... 15

5.5 ‘Advanced’ Page............................................................................................................................................ 16

5.5.1 Advanced communication settings........................................................................................................ 16

5.5.2 Miscellaneous ......................................................................................................................................... 17

5.5.4 Zero Coefficients..................................................................................................................................... 18

5.6 Timestamp ................................................................................................................................................ 19

6. Service and Calibration ..................................................................................................... 20

6.1 Service ........................................................................................................................................................... 20

6.2 Calibration ...................................................................................................................................................... 20

6.3 Adjustment ..................................................................................................................................................... 20

6.4 Cleaning ......................................................................................................................................................... 20

Page 3

1 Description

1.1 General

The Q-Daq is a self-contained pressure scanner that acquires and transmits pressure data to a host

via Ethernet or a CAN bus. The Q-Daq is mechanically based on the Chell SQDC range giving the

user the ability to connect it to an existing SQDC loom or, with the appropriate mating half, connect

the Q-Daq to flexible or solid tubing.

The Q-Daq range consists of two of models which are covered by this manual. These are the Q-Daq

PoE with is powered by Power over Ethernet (PoE) and features an M12 connector. This variant of

the Q-Daq does not have the facility for CAN communications or hardware trigger. The DC powered

version (D-Daq DC) does have the CAN and hardware trigger facility and is powered by a DC voltage

of 8 to 25 VDC.

Both devices have the ability to output absolute pressures or differential pressures. When differential

pressures are required, one of the 16 transducers is selected as the reference and subtracted from

the other 15 measurements.

Both Q-Daq models have a built-in heater which can be controlled via the web interface. The heater

is capable of maintaining a temperature of around 30°C above ambient and it can be set to control

any given temperature from -55°C to 70°C.

The Q-Daq is configured by using its embedded web-server. The output can be configured in a

number of ways including averaging, transmission speed, absolute or differential and also the ability

to add a time stamp to the data (compliant with IEEE1588 PTP v2).

This manual revision covers firmware version 1.0.0 PoE.

Page 4

2 Specifications

2.1 PoE Specification

802.3af/bt Class 3 10W maximum

2.2 Power Supply (Q-Daq DC Only):

Line voltage:

8-25 VDC

Absolute Max. Line voltage

25 VDC

Consumption:

Max 1VA

2.3 CAN specifications (Q-Daq DC only):

CAN type

2.0B

CAN baudrate

Configurable from 1M, 500K, 125K and 100K.

Programmable variables:

Address 0x?nn

Most significant programmable device ID

Address 0xn?n

Next most significant programmable device ID

BRP

CAN bus timing

TSEG1

CAN bus timing

TSEG2

CAN bus timing

SJW

CAN bus timing

2.4 Ethernet Specifications:

TCP/IP

10Mb/s & 100Mb/s via Auto Negotiation

TCP & UDP protocols supported

2.5 Environmental specification:

Operating temperature range:

-40°C to +90°C

Storage temperature range:

-40°C to +90°C

Maximum Relative humidity:

95% at 50°C (non condensing)

Ambient altitude (provisional)

100 mbar abs or nominally 52000 ft

Vibration (provisional)

Engine standard vibration test to DO160E category S,

curve W with duration of 1 hr/axis. Fan blade out case

to DO160E category S, curve P.

Fan blade out to DO160F section 7 (40g 11m/s)

Engine load to +/- 40g per axis

Radiated emissions

MIL standard 461-E: RE102

Conducted emissions

MIL standard 461-E/MIL standard 461-C

2.6 Mechanical specifications.

Pneumatic interface:

16 way SQDC male – will interface with:

SQDC-R-16-01 to SQDC-R-16-07

Weight :

340g

Environmental sealing:

IP67

Page 5

2.7 Heater Specifications

Controlable between -55 and 70

C (via Webserver). 7.5 watts power.

2.6 Dimensions

2.6.1 Q-Daq-PoE

Page 6

3 Installation and Interconnections

3.1 Electrical connections

3.1.1 Q-Daq PoE Electrical connections (M12 connector)

3.2 Q-Daq Pneumatic Connections

For Details on the SQDC interface, please refer to the SQDC data (SL00914.pdf) sheet and manual

(90014723.pdf)

Hot plugging the power to the Q-Daq at the connector can cause permanent damage to

the unit. Always switch the power at the power supply source.

Function

MDX0+

MDX0-

MDX1+

MDX1-

MDX3+

MDX3-

MDX2+

MDX2-

Page 7

4 Operation of the instrument

4.1 Connecting up the Q-Daq.

The Q-Daq has one connector and cable which supplies the unit with power and also provides CAN

(Q-Daq DC only) and Ethernet comms. Ensure all the connections are made before powering up the

Q-Daq. The Q-Daq should not be hot plugged with the power connector. Doing so can cause

permanent damage to the unit. Always switch the power at the power supply source.

Upon power up, the blue LED will light constantly while the Q-Daq boots up. This will typically take

around 2 seconds. When the Q-Daq has finished booting, the blue LED will flash at a constant rate to

show that the system is running (unless auto hardware trigger enable has been set – see later).

To connect to the Q-Daq, establish an Ethernet connection to the Q-Daq using the appropriate cables

and check that the necessary link lights are lit. The host PC must have an i/p address in the same

range as the Q-Daq. For example, if the Q-Daq had an i/p address of 192.168.1.190 then (depending

on the subnet mask used) the first three octets of the subnet mask should be the same – i.e.

192.168.1.XXX. Once the connection has been established, the i/p address can be changed and the

Q-Daq connected to the user network.

NOTE: If the i/p address is changed, it is very important that a record is made of the new i/p address

as it cannot be ascertained without returning the unit to Chell Instruments.

4.2 Configuring the Q-Daq

The Q-Daq is designed to be configured by using the embedded web server. Here all the product

variables may be changed including i/p address, CAN i/d, averaging, transmission speed etc. Once

these setting are configured, they can be permanently saved by clicking on ‘BURN TO EEPROM’.

Once the unit is reset, the Q-Daq will run using these setting.

The Q-Daq can be configured to output data over CAN (Q-Daq DC only) or Ethernet (TCP/IP or UDP)

and, if configured to do so, it will output this data immediately upon power up. The Q-Daq can also

accept commands over the Ethernet or CAN networks to configure the majority of the internal setting

(with the exception of CAN i/d, i/p address and some lower level functions). Please refer to document

900222 – nanoDaq-LT user programming guide for available CAN and Ethernet commands and the

format of the data output stream.

4.3 Re-zeroing the Q-Daq.

It is possible to re-zero the output of the Q-Daq for either absolute or differential measurements.

The Q-Daq is re-zeroed by sending the appropriate command over the CAN or Ethernet link via the

Chell software or via the embedded webserver. The system will then average a number of zero

readings and perform a re-zero. Naturally, there should be no pressure applied to the ports of the

scanner when a re-zero is being performed.

When a re-zero is being performed, the red LED will light momentarily. The re-zero value is not stored

in volatile memory and will be lost upon reset. See section 5.5.4 for permanently saving the zero

values if necessary.

Page 8

4.4 Hardware Trigger (Q-Daq DC only)

The Q-Daq features a hardware trigger to enable the user to synchronise multiple Q-Daq’s and to

calculate the timing of the measurements made. The hardware trigger takes the form of a pulse train.

Each time the Q-Daq receives a positive edge, it will generate a set of measurements for all the

channels configured in the system.

4.4.1 Hardware Trigger Input (Q-Daq DC only)

The hardware trigger input is a 5V TTL square wave pulse train. Minimum frequency 2Hz and

maximum frequency 180KHz.

4.4.2 Timing Information (Q-Daq DC only)

The hardware trigger allows the user to calculate the time of each measurement. For example, if the

hardware trigger were running at 100Hz then the user would receive 100 measurements per channel

per second. The first pulse would generate the first set of measurements and 10ms later the second

pulse would generate the second set and so on. When the hardware trigger is activated, the Q-Daq

will wait for the first pulse. The time that this first pulse is generated can be measured by the user and

therefore the time of the first set of data and all subsequent sets can be determined

4.4.3 Software Control

The hardware trigger mode is activated by the T command over the CAN or Ethernet interfaces. The

T command can be used to enable the hardware trigger that will cause the Q-Daq to stop free-running

and wait for the first pulse. The disable command will return the Q-Daq to free-running. The command

structure is as follows:

Command

Interface

On / Off

T01

CAN

Off

T11

CAN

T02

Ethernet

Off

T12

Ethernet

The hardware trigger can also be set to auto enable on power up which means that the Q-Daq will

not go into free-running mode after initialisation and will instead wait for the first hardware trigger

pulse. In this instance the blue LED will not flash at a constant rate after initialisation and will actually

turn off. This feature can be enabled/disabled from the embedded webserver configuration.

Page 9

5 Q-Daq Configuration Webserver

5.1 Introduction.

The Q-Daq web Configuration provides the means of setting up and demonstrating the Q-Daq unit

from a standard PC with an Ethernet port and browser.

The webserver is divided by tabs into five areas of functionality, namely 'Setup’, 'Live Data',

‘Advanced’, ‘Timestamp’ and ‘Factory Tools’.

'Setup Parameters' provides the means to set Q-Daq’s main operating parameters such as data

streaming rates and Device addresses.

The unit's function may be checked and demonstrated using 'Live Data' to show the Q-Daq’s

calibrated output.

‘Advanced’ provides setup for the all other more advance parameters that may require setting on a

per application basis.

‘Timestamp’ provides some options for configuring the timestamping feature of the Q-Daq.

‘Factory Tools’ provides some functionality to change the MAC address of the Ethernet hardware.

This tab is password protected and therefore not readily available to everyone and further detail is

beyond the scope of this document.

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