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Related Manuals for Chell MicroDAQ3
Summary of Contents for Chell MicroDAQ3
- Page 1 Chell Instruments Ltd Folgate House Folgate Road North Walsham Norfolk NR28 0AJ ENGLAND Tel: 01692 500555 Fax: 01692 500088 MicroDAQ3 Pressure Scanner Acquisition System INSTALLATION OPERATING MANUAL info@chell.co.uk e-mail:- Visit the Chell website at: http://www.chell.co.uk 900252-1.4...
- Page 2 Chell Document No. : 900252 Issue 1.4 ECO : xxxx Date: 18/01/2023 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.
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Page 3: Table Of Contents
3.3.2 64 channel Non-valved Version ........................10 3.3.3 16 channel Version ............................10 Operation of the instrument ....................11 Connecting up the MicroDAQ3........................... 11 4.1.1 DC Powered Versions ..........................11 4.1.2 PoE Versions ..............................11 Connecting to the MicroDAQ3 ..........................12 4.2.1... - Page 4 Timestamp ................................24 Timing and The Acquisition Cycle ..................25 The MicroDAQ3 Acquisition Cycle ........................25 Sensor Response Modes ............................25 The MicroDAQ3 Data Output Cycle ........................26 Averaging ................................26 Averaging and Time Stamping ..........................27 Hardware Trigger ......................... 28 Hardware Trigger Input.
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Page 5: Description
1.1 General The MicroDAQ3 is a self-contained pressure scanner that acquires and transmits pressure data to a host via Ethernet or a CAN bus. The MicroDAQ3 fits into the Chell pressure scanner range alongside the established microDAQ, microCAT and nanoDaq-LT range. -
Page 6: Specifications
2 Specifications 2.1 Ranges The MicroDAQ3 is available in the following ranges: Differential Range MicroDAQX Absolute Range MicroDAQX Range Range Code Code (PSI) 4” water 1 kPa 0.144509 10” water 2.5 kPa 0.362173 20” water 5 kPa 0.722541 1 psi 7 kPa 2.2 to 16.8 psia... - Page 7 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 100 mbar abs or nominally 52000 ft Vibration 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.
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Page 8: Installation And Interconnections
3 Installation and Interconnections 3.1 Electrical Connections 3.1.1 64 channel DC Powered Versions - 9-way micro-miniature ‘D’ type (suggested mate : Glenair MWDM2L-9PS - solder cup version) Pin 1 Pin 2 Ethernet Rx+ Pin 3 CAN Low Pin 4 Ethernet Tx+ Pin 5 + Supply (8-25 VDC) Pin 6... -
Page 9: Pneumatic Connections
3.2 Pneumatic Connections 3.2.1 64 channel Valved version 3.2.2 64 channel Valved version with quick disconnect plate 3.2.3 64 channel non-Valved version Page 8... -
Page 10: Channel Non-Valved Version With Quick Disconnect Plate
3.2.4 64 channel non-Valved version with quick disconnect plate 3.2.5 16 channel version Hot plugging the power to the MicroDAQ3 at the connector can cause permanent damage to the unit. Always switch the power at the power supply source Page 9... -
Page 11: Mounting Features
3.3 Mounting Features 3.3.1 64 channel Valved Version 3.3.2 64 channel Non-valved Version 3.3.3 16 channel Version There are no mounting features on the microDAq3-16 Page 10... -
Page 12: Operation Of The Instrument
– see later). 4.1.2 PoE Versions When using the MicroDAQ3 PoE version, all that is required is to plug the unit into a PoE enabled ethernet switch. The MicroDAQ3 will then negotiate with the switch so that sufficient power is supplied to the unit. -
Page 13: Connecting To The Microdaq3
NOTE. If the IP or subnet mask of the MicroDAQ3 is changed, it must be recorded (we recommend that it is written on a new label) as it will not be possible to connect to the MicroDAQ3 if these details are not known. -
Page 14: Configuring The Microdaq3
The MicroDAQ3 can be configured to output data over CAN or Ethernet (TCP/IP or UDP) and, if configured to do so, it will output this data immediately upon power up. The MicroDAQ3 can also accept commands over the Ethernet or CAN networks to configure the majority of the internal setting (with the exception of CAN ID, IP address and some lower level functions). -
Page 15: Microdaq3 Configuration Webserver
5 MicroDAQ3 Configuration Webserver 5.1 Introduction. The MicroDAQ3 web Configuration provides the means of setting up and demonstrating the MicroDAQ3 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’... -
Page 16: Common Controls Sidebar
Figure 5.2, Sidebar 5.4 Controls for valved variant Figure 5.3 shows the sidebar panel of a valved MicroDAQ3 unit, it contains the same standard controls as described in the previous section with the addition of two additional controls for placing the device into its calibration mode and into standard operating mode. -
Page 17: The 'Setup Parameters' Page
‘Data Rate’ option list Selects the rate at which the MicroDAQ3 will automatically transmit data after reset. The maximum data rate available will be dependent on the sensor response setting is selected on the Advanced settings tab. -
Page 18: Udp Parameters
Note that the MicroDAQ3’s local IP address is the same setting as from the TCP Comms group. Figure 5.6, UDP Comms group ‘Local IP address and subnet’ This displays the IP address of the MicroDAQ3, this is the same as in the TCP comms section. ‘Local port’ Local port of the device. -
Page 19: Can Parameters
Figure 5.7, CAN Comms group ‘CAN First TX Message ID’ MicroDAQ3 uses standard CAN message arbitration id’s, and the unit is assigned the most significant 2 digits of the Hex base address. For the digits 0x1A0 for example, data for the first 4 channels will be sent on 0x1A0, the next 4 on 0x1A1, etc. -
Page 20: Live Data' Page
Figure 5.8, 64 channel Live Data Page – absolute measurements The live data page is a means to demonstrating the correct operation of MicroDAQ3 and testing the unit's calibration. A value label is shown for each channel with 1-64 (1-16 for the 16 channel variant) for both the temperature and the pressure data. -
Page 21: Live Data' Page Valve Position Descriptor
This setting does not affect the main output stream configuration (see section 5.5.2). 5.5.1 ‘Live Data’ Page Valve Position Descriptor For valved variants of the microDAQ3 the current position of the valve is described below the reference channels. This will indicate whether the valve is in the position that each channel is fed by its individual tubulation (Run) or the position in which all channels are fed from a common tubulation (Purge/Cal). - Page 22 Auto Broadcast UDP message on boot If checked, auto broadcasts a UDP message on port 10001 on start-up which details the MicroDAQ3’s serial number, IP address, etc. in an ASCII, comma separated list. (should not be used if remote UDP address/port has been configured and auto streaming has been set –...
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Page 23: Miscellaneous
5.6.2 Miscellaneous The remaining parameters are edited via the Miscellaneous group shown in Figure 5.10. The MicroDAQ3 allows the user to change the pressure unit and type output in the data stream Figure 5.11, Miscellaneous group. ‘Auto enable HW trigger on If set to anything other than Off, the MicroDAQ3 will immediately switch to hardware start-up’... -
Page 24: Zero Coefficients
5.6.3 Zero Coefficients The Zero coefficients for the linear cal. are displayed as a separate group at the bottom of this page. These values are the current zero offsets gained when the device is re-zeroed. The zero offset is displayed in tenths of a pascal. Figure 5.12 64 channel Zero Coefficients group ‘Save Rezero’... -
Page 25: Timestamp
5.7 Timestamp This page allows the user to edit the timestamp settings of the MicroDAQ3. This timestamp will allow the user to get millisecond level accuracy timestamps on the data packets. If the timestamp is enabled it will have an effect on the maximum transmission rate. -
Page 26: Timing And The Acquisition Cycle
37.8 µs apart as shown in orange below. 6.1 Sensor Response Modes The MicroDAQ3 offers a range of oversampling options that will reduce noise at the expense of reducing the maximum acquisition frequency. These sensor modes are: 400 Hz 200 Hz 100 Hz... -
Page 27: The Microdaq3 Data Output Cycle
The user can select the data rate they require and the MicroDAQ3 will output at this data rate upon power-up. The example below shows a MicroDAQ3 configured in 400 Hz mode but with a 100 Hz data rate. Here, every 4 set of channel data will be selected from the acquisition buffer and transmitted over Ethernet or CAN. -
Page 28: Averaging And Time Stamping
6.4 Averaging and Time Stamping When a running average is selected, it should be noted that the time stamp for that data set would be that of the last measurement that is added to the buffer. Page 27... -
Page 29: Hardware Trigger
MicroDAQ3’s and to calculate the timing of the measurements made. The hardware trigger takes the form of a pulse train. Each time the MicroDAQ3 receives a positive edge, it will generate a set of measurements for all the channels configured in the system. -
Page 30: The Hardware Trigger And System Timing
7.5 The Hardware Trigger and System Timing When the MicroDAQ3 hardware trigger is enabled, the MicroDAQ3 will pause and wait for a hardware trigger. When it is received, the MicroDAQ3 will acquire data from channel 1 and then continue the acquisition cycle as normal. When all 64 (16 for the 16 channel variant) channels and the reference(s) are acquired, the MicroDAQ3 will then wait again for the next hardware trigger. -
Page 31: Service And Calibration
8 Service and Calibration 8.1 Service There are no user serviceable parts inside the instruments. Should any difficulties be encountered in the use of the MicroDAQ3, it is recommended that you contact Chell Instruments Ltd for advice and instructions. 8.2 Calibration Calibration is recommended on an annual basis and Chell Instruments Ltd.
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