R Tech Electronics QMBox User Manual
Contents
1. etc installed in a single case These modules can be combined in one device in any configuration comprising one to eight modules 5 1 QMS10 ADC Module QMS10 is a multichannel ADC module with 16 differential 32 single ended analog inputs e Max sampling rate one channel 0 4 MS s e Four input signal ranges 10 V 2 5 V 0 625 V 0 156 V programmable per channel R Tech Electronics QMBox User Manual 5 1 1 Specifications Number of input channels 16 differential 32 single ended Input signal range programmable per channel 10 V 2 5 V 0 625 V 0 156 V Max aggregate throughput 0 4 MS s e e Max sampling rate one 0 4 MS s sw G Sensitivity 0 7 mV Reference limiting error 0 05 Typical common mode rejection ratio input signal 5 75 dB V 10 kHz Typical crosstalk for input signal 10 kHz with channel switching frequency 100 kHz 83 dB at input ranges 10V 2 5 V 0 625 V Input overvoltage protection Permanent overvoltage 10 sec 15 V Impulse 1 ms 50 V Figures below show typical characteristics of a QMS10 module Harmonic distortion noise in the fanc band the graph of Crosstalk dependency towards channel switching frequency R Tech Electronics QMBox User Manual Alita at a Ne UOMO TE bl A E e E EE E A EE ul naa vis AAA Tie Mk al all Harmonic distortion Input signal sine wave 10 kHz 3V fapc 400 kHz R Tech Electronics QMBox U2. shielded or coaxial cables are used to connect the outputs of QMS45 to the inputs of remote objects the load capacity should not exceed 500 to 1000 pF Otherwise as with any broadband source with low output impedance the sustain problems can arise This is especially significant for non filtered outputs Below is an example of the non filtered output loaded with 4700 pF capacity behavior Non filtered output loaded with 4700 pF capacity behavior 5 5 QMS70 discrete input module QMS70 is a multichannel discrete input module with 16 independent channel to channel isolated inputs e Several input ranges from 5Vto t 220V e Ability to interrogate the signals provided by both DC and AC voltage e High voltage galvanic isolation of inputs 5 kV 23 R Tech Electronics QMBox User Manual 5 5 1 Specifications Nominal value of input voltage depending on 5 V 24 V 220 V the version Minimum value of logical 1 input voltage 4V 20V 150V depending on the version Maximum value of logical 0 input voltage 1V 4 5V 25V depending on the version Aggregate throughput all 4 kS s ome a O Sampling rate Sampling rate 0 25 kS s per channel Galvanic isolation of input 5 kV 3 75 kV RMS amekoma Channel to channel 500 V ma l O Input overvoltage protection impulse 1 ms t 25 V 110 V 1000 V depending on the version 5 5 2 Connecting to the object The input port of the QMS70 module i
3. 0 0015 of full scale with lt 100 pF load with lt 500 pF load lt 2 us lt 4 us Typical THD Noise output 90 dB cmentsdond 5 4 2 Using the built in filters Each output channel module has two outputs filtered DAC signal passes through the built in filter and unfiltered the same signal goes directly to the DAC Unfiltered output should be used when the terms of the task requires switching the signal levels in the shortest possible time Module stabilizes desirable level in no more than 4 mks for the load with capacitance up to 500 pF as it s shown in the figure below Non filtered output with load with capacitance 470 pF The use of unfiltered output may cause some problem when the smooth switching between output levels is required Switching noise is clearly visible for small changes in the signal as it s shown in the figure below 19 R Tech Electronics QMBox User Manual Changing the signal for 2 mV on non filtered output It should be noted that the scope of switching noise doesn t depend on the strength of the measured signal It means that in volts range this problem doesn t occurs as it s shown on the figure below Changing the signal for 2 V on non filtered output Nevertheless when smooth waves are generated it s advisable to use filtered output It will allow to eliminate switching noise and to reduce the impact of switching fronts on the shape of the signal 20 R Tech El
4. rate 0 25 kS s per channel Galvanic isolation of input channels from USB 1000 V Channel to channel galvanic isolation 500 V S series submodules are installed into slots on QMS301 Carrier module One QMS301 module may carry up to 16 S series ADC of various types and combined in different ways Carrier module QMS301 with four S series submodules installed is shown below 26 R Tech Electronics QMBox User Manual 6 1 S20 current measurement S20 is a single channel S series ADC for current measurement Specifications Sampling rate 0 25 kS s Input signal range 0 20 mA Custom made versions with the ranges 0 5 mA 5 mA and 20 mA are available Reference limiting error 0 075 6 2 S30 voltage measurement S30 is a single channel S series ADC for voltage measurement Specifications Sampling rate 0 25 kS s Input signal range 10 V Custom made versions with other ranges including millivolt ones are available Reference limiting error 0 075 6 3 S40 thermocouples interrogation S40 is a single channel S series ADC for thermocouples interrogation All types of thermocouples are supported according to IEC 60584 1 27 R Tech Electronics QMBox User Manual Specifications Sensor connection 2 wire Thermocouples type According to IEC 60584 1 including E J K R S T B N L M ADC resolution 12 bits Sampling rate 0 25 kS s Input si
5. single ended mode Xn Yn AGND32 AGND Common ground connection scheme 5 2 QMS15 ADC Module QMS15 is a multichannel ADC module with 16 differential 32 single ended analog inputs e ADC Resolution 16 bits e High sensitivity 0 1 mV e Signal to Noise ratio 96 7 dB e Max aggregate throughput 0 5 MS s e Low input current and capacity e 3 programmable input ranges 1 5 V 4 5 V 10 V 5 2 1 Specifications Number of input channels 16 differential 32 single ended Input signal ranges programmable per 10 V 4 5V 41 5V channel R Tech Electronics QMBox User Manual Max aggregate 0 5 MS s Max sampling rate one 0 5 MS s Sensitivity at input range 1 5 V 0 1 mV at input range 4 5 V 0 2 mV at input range 10 V 0 6 mV Noise voltage RMS at input range 1 5V 0 035 mV 93 8 dB at input range 4 5V 0 08 mV 96 3 dB at input range 10V 0 15 mV 96 7 dB Max reduced to rage basic error at input range 1 5 V at input range 4 5 V at input range 10 V Typical input capacity 25 pF Typical non linearity of 0 01 conversion E Typical common mode Input overvoltage protection 25 V Permanent overvoltage 10 s 250 V Impulse 1 ms Typical QMS15 ADC characteristics are shown below QMBox User Manual R Tech Electronics SNA dB 93 8 Distribution of the results from ADC at the range 1 5 V with input voltage 0 V X ADC codes
6. the course of work the modules of the device are precisely synchronised with each other However sometimes it is necessary not only to synchronize the modules with each other but to precisely time the entire device to be started by a certain external event By default the device starts working i e starts the data transfer session since after issuing the command Start from a PC This command can be executed within a few milliseconds The exact execution time of this command under OS Windows that is not a real time OS is impossible to be learnt in advance For the cases when it is necessary to bind the start of the data transfer session to any external event with high precision one can use the external start synchronization mode In this mode it is necessary to give a negative digital pulse logical 1 0 1 to the SYN contact of the device after the issuing the Start command The data transfer session begins right after negative pulse edge logical 1 to O arrives The duration of the SYN pulse i e of the logic O must be at least 50 ns The SYN line has an internal pull up resistor so one can just short the SYN line to ground to generate the required pulse Switching between start synchronization modes of data acquisition is software selectable 5 Functional modules used in the QMBox series devices QMBox devices consist of a set of functional modules ADC DAC Discrete I O
7. AGND pin of the input port This will eliminate formation of ground loops that are a source of extra noise On the scheme there are the examples of the correct connection of 1 phase and 2 phase differential signal sources to the module Note that even single phase signal sources should be connected to a differential input with three wires The single phase signal The differential signal sources sources Single phase and differential connection 5 4 QMS45 DAC Module QMS45 is a multichannel DAC module with 8 independent optically isolated analog outputs e DAC resolution 16 bits e Output signal range 10 V e Ultra low glitch impulse e Galvanic isolation of analog outputs from USB e Stream output mode allows to generate non periodic signals of arbitrary form and duration 5 4 1 Specifications Number of output charres 00n aa i If QMBox device contains 2 or more QMS45 modules only one of them can operate in stream output mode Other DAC modules of the device can operate in oscillator mode only In oscillator mode the module sends the contents of its internal buffer the buffer size is 32 kS per channel cyclically through the DAC without updating of the output data from PC This mode is suitable for generating simple periodic signals and DC signals 18 R Tech Electronics QMBox User Manual Aggregate throughput all 1 MS s channels Conversion rate one channel 125 kS s Output voltage settling time to
8. Connecting the device to the PC for the first time 4 Connect the signal sources to the device see Connecting to the object The procedure of disconnecting the QMBox series devices 1 Disconnect the object signal sources from the device 2 Disconnect the device from the PC 3 Disconnect the power supply from the AC network 4 Disconnect the power supply from the device 7 1 Connecting the device to the PC for the first time When the QMBox series device is connected to a Windows PC for the first time it is necessary to specify the location of the device driver Before connecting the device to the PC for the first time you should first insert the included CD into the CD ROM drive of your PC and only then connect the device to the PC via a USB cable As a rule having detected a new device Windows starts the Found New Hardware Wizard In this case you should follow its instructions choosing not to go to the Windows Update site and specifying the DRV folder on the included CD as the location of the driver Windows might not start the Found New Hardware Wizard automatically returning a driver error message in the notification area in the right bottom corner of the screen I Device driver software was not successfully installed gt St Click here for details In this case you should start the Device Manager In different Windows OS versions the Device Manager is started differently For example in Windows 7 it can be s
9. DC module 3 DAC module 4 Interface board that controls operation of the modules and ensures connection of the device to the computer via USB 5 Interconnect board that ensures electric connection of the modules to the interface board Inside the case the modules are plugged into the slots of the interconnect board This board joins the modules into a single device and ensures electric connection of the modules to the interface USB board The interface board controls operation of the modules and ensures connection of the device to the PC via USB 3 Principle of operation The QMBox series devices operate under PC control OS Windows via USB connection The software supplied with QMBox devices performs stream input output of data between the device and the PC memory data processing and further visualization on the display as well as saving to the PC hard disk QMBox TT hardware j Object Sensor Data processing signals Digitizing Data visualization Control signals generating Control signals W Data saving QMBox devices consist of a set of functional modules ADC DAC Discrete I O etc installed in a single case Depending on data transfer direction all the QMBox modules can be subdivided into input modules ADC and discrete input modules and output modules DAC modules Before starting work the configuration is performed by means of the software the operation parameters of the modules of th
10. Manual 8 2 Software development kit Apart from the complete QMLab software suite the QMBox delivery set includes an SDK package which is software and documentation designed for users who would like to create their own applications for working with the device This software consists of function libraries API and examples of software development The user has a possibility to create full blown applications using just a limited number of library functions These library functions are written so that even an inexperienced programmer who is not well versed in multithreaded and object oriented programming can work with the device A more detailed description of the software development kit is given in the QMBox Programming Guide document that can be found on the site www daq lt and on the CD supplied with the device 33
11. OMx inputs for common wire noise compensation In the simplest scheme ECOMx inputs must be connected to the corresponding contacts COM x directly on the input port QMS45 DAC 1 FDAC1 COM1 ECOM1 Object DAC2 FDAC2 COM2 ECOM2 The connection of the devices without differential communication lines is exposed to stray currents induced by wires connected to a common circuit and poorly suppresses interference from the electromagnetic fields Using such precise and broadband source as QMS45 suggests increased requirements to reduce noises in the circuit connected to the object Therefore it s recommended to use differential inputs on the side of the object QMS45 DAC1 FDAC1 COM1 ECOM1 DAC2 FDAC2 COM2 ECOM2 Especially high rate of noise reduction will be achieved with the use of shielded twisted pair as shown for the channel number 2 1 Max allowed voltage on SYN 0 5 5 V to AGND 22 R Tech Electronics QMBox User Manual The application of such a scheme is possible only when the subject has the appropriate inputs differential high common mode rejection ratio in a wide range of frequencies In most practical situations it is not Therefore QMS45 has inputs noise compensation in return lines to ensure good signal to noise ratio In this case the scheme for the majority of cases will be equivalent to the previous one QMS45 DAC 1 FDAC1 ECOM 1 COM1 DAC2 FDAC2 ECOM2 COM2 When twisted pair
12. R Tech Electronics QMBox User Manual 1 General information The QMBox series devices are designed for automation of measurement and control units used for vast spectrum of tasks including laboratory research and industry automation QMBox series includes sensor interrogation devices various A D and D A converters and discrete I O devices QMBox devices may contain measuring and control channels of different types AD Converter DA Converter or AD Converter relay switching or AD Converter DA Converter digital input etc QMBox devices consist of a set of functional modules ADC DAC Discrete I O etc installed in a single case These modules can be combined in one device in any configuration comprising one to eight modules This scalable modular architecture allows to e combine all necessary functions in one device e automate small installations requiring only a few measuring channels as well as to create large measuring systems for hundreds of channels 2 Architecture Depending on the number of modules the device can be designed as a 1 2 3 and 8 modular unit 1 module case 2 modules case 3 modules case 4 to 8 modules crate 140x190x40 mm 140x190x60 mm 140x190x80 mm 260x260x160 mm The two module device ADC DAC is used to demonstrate QMBox internal construction R Tech Electronics QMBox User Manual A the assembled device B the same device with the cover removed 1 Bottom shell 2 A
13. Y the number of results in logarithmic scale SNA dB 96 3 l 10 4 Distribution of the results from ADC at the range 4 5 V with input voltage 0 V X ADC codes Y the number of results in logarithmic scale 10 R Tech Electronics QMBox User Manual SMA dE 96 7 100000 vn aa 1218 23 2931 Distribution of the results from ADC at the range 10 V with input voltage 0 V X ADC codes Y the number of results in logarithmic scale Crosstalk dB 0 100 200 300 400 Frequencies of channel switching KHz Crosstalk function of channel switching frequency 11 R Tech Electronics QMBox User Manual 5 2 2 Connecting to the object The input port of the QMS15 module is described in the table below where Xn non inverting and Yn inverting inputs of the differential channel n NC the pin is reserved mf camer eee e vuma So e Wena SSS o umna SSS D The correct connection of the sources of analog signal is the most important condition of the correct operation of acquisition system which allows avoiding a lot of problems during the device operation During the connection of the sources of analog signal to the device it is necessary to keep to the following recommendations 1 Differential connection presupposes measuring voltage difference between the inverting and non inverting inputs of the channel i e differential voltage However it is necessary to remember
14. allow connecting signal sources so that currents of signal circuits do not flow through a single wire which increases measurement accuracy The correct connection of the sources of analog signal is the most important condition of the correct operation of acquisition system which allows avoiding a lot of problems during the device operation During the connection of the sources of analog signal to the module it is necessary to keep to the following recommendations 1 Differential connection presupposes measuring voltage difference between the inverting and non inverting inputs of the channel i e differential voltage However it is necessary to remember that the voltage in relation to the analogue ground of the device on both inputs common mode voltage should not be higher than the acceptable input signal range 2 Correct connection of a signal to the differential input is always a three wire connection It is necessary to separate signal wires connected to a high impedance input from the common ground wire Thus circuit of high current through signal wires which reduces measurement accuracy is eliminated 1 Allowable potential on the SYN input is 0 3 5 V relative to the ground contacts 11 28 Analog ground is connected to USB ground inside the device 17 R Tech Electronics QMBox User Manual 3 When several signal sources are connected to the device it is advisable that their common wires connect at one point only on the
15. e device are set sampling rate the number of channels in use etc After this the device is started i e the data transfer session is launched R Tech Electronics QMBox User Manual During the data transfer session the input modules of the device ADC modules for example digitize input signals at a pre set rate and send the data through the interface board to the computer via USB In the PC the data is put to a circular buffer in RAM During the buffer filling the data is taken from it by the application software for further processing visualization and saving to the hard disk Since the software takes data from the buffer at a rate higher than the rate of its receipt from the device the data transfer session can last for however long and data from the device is received by the computer without gaps Thus the device can be used as a full fledged data recorder without record time limits Output modules DAC modules can operate in stream mode too This mode allows to generate non periodic signals of arbitrary form and duration and to play files of arbitrary length through the DAC In this mode the data in the internal buffer of the DAC module updates permanently from the PC RAM The data transfer session can last for however long and data from the PC RAM passes through the DAC without gaps 4 Synchronization modes All the modules installed in the device are clocked by the same generator on the interface board That is why in
16. ectronics QMBox User Manual Changing the signal for 2 V on filtered output This method generates perfectly shaped signal with amplitudes from less than 1 mV to 10 V in the frequency range up to 50 kHz M 258 ps 1 kHz 1mV sine signal on filtered output 5 4 3 Connecting to the object The input port of the QMS45 module is described in the table below 20 fitered output DAG 21_ ECOMI outer common DACI 22 filtered outputFDAC2 23 ECOM2 outer common DAC2 24 filtered outputFDACS 25 ECOM3 outer common DAC 26 filtered output FDACA 8 coma common 27 Ecoma outer common Daca E 29 30 a F 33 a 3s 36 Z a Description oa 9 outpurdacs 31 ECOM6 outer common DACE FAGND common 13 output DAC7 14 COM7 common 7 15 output DAC8 17 AGND common 18 output 12 V power output 19 SYN input for outer AGND common B da s a7 8 E Analogue ground is connected to USB interface inside the device 21 R Tech Electronics QMBox User Manual _ synchronization a Each DAC channel takes 4 connectors DACx non filtered DAC output of channel x FDACx filtered DAC output of channel x COMx contacts for connection of common return wire from DAC output channel x All COMx contacts and AGND are connected inside the device but to ensure minimum interference in a wide frequency range using COMx contacts with corresponding numbers are recommended EC
17. from the common ground wire Thus circuit of high current through signal wires which reduces measurement accuracy is eliminated 3 When several signal sources are connected to the device it is advisable that their common wires connect at one point only on the AGND pin of the input port This will eliminate formation of ground loops that are a source of extra noise 4 The unused analogue inputs should be grounded i e just to be connected with AGND pins of the input port Unused digital inputs could be left disconnected On the scheme there are the examples of the correct connection of 1 phase and 2 phase differential signal sources to the device Note that even single phase signal sources should be connected to a differential input with three wires The single phase signal The differential signal sources sources Single phase and differential connection R Tech Electronics QMBox User Manual Differential connection of a signal source reduces the level of common mode noise Besides differential inputs allow connecting signal sources so that currents of signal circuits do not flow through a single wire which increases measurement accuracy Single ended input mode permits doubling the number of channels when the use of differential inputs is not required On the scheme there is the example of the correct connection of 1 phase signal sources to the module in single ended mode The single phase signal sources in
18. gnal range 25 mV 75 mV Reference limiting error 0 075 6 4 S50 resistance measurement S50 is a single channel S series ADC for resistance measurement including thermistors Specifications Sensor connection 2 wire 3 wire 4 wire ADC resolution 12 bits Sampling rate 0 25 kS s Input signal range 0 250 Q Custom made versions with other ranges are available Reference limiting error 0 075 7 Connection of the device The figure shows the rear panel of a QMBox device Link LED A USB Port Power Supply Port Link LED turns on when the device is connected to USB and signals that the USB port of the computer has identified the device correctly 28 R Tech Electronics QMBox User Manual USB port type B A standard connector for connecting the device to the PC via USB with an standard USB A B cable Power Supply Port it is used for supplying power from an external supply included in the delivery set The procedure of connecting the QMBox series devices is as follows 1 Connect the power supply from the delivery set of the device to the Power Supply Port of the device 2 Connect the power supply from the delivery set of the device to AC network 3 Connect the device to the PC via a USB cable At this the Link LED should turn on When the device is connected for the first time driver installation might be required For further information see
19. installed the RT USB30K QMSystem Crate Controller USB device should appear in the Device Manager 30 R Tech Electronics QMBox User Manual gt 19 Ports COM amp LPT gt Processors re R Technology Devices ae a RT USB30K QMSystem Crate Controller USB ily Sound video and game controllers y JE System devices p Universal Serial Bus controllers This means that the device s Interface board has been identified correctly by the PC the driver is installed and the device is ready to work Afterwards when the QMBox device is connected to another USB port of the PC Windows might once again detect the QMBox device as unknown device In this case you will have to repeat the driver installation procedure as described above 7 2 Connection to the object The figure shows the front panel of a QMBox device 2 modules model modules Input Ports Every functional module which is a part of the QMBox device has its own input port for the signals connection The input ports for each module type are described in chapter Functional modules used in the QMBox series devices 8 Software QMBox software consists of following components e QMLab software suite e Software development kit SDK package 31 R Tech Electronics QMBox User Manual 8 1 QMLab software suite The QMLab software suite is a universal software tool for working with QMBox devices It allows performing most standard tasks within meas
20. ly three of them can operate with maximum rate 3 Ms s per module and other modules of device must operate with rate not exceeding 10 3 3 1 MS s 14 R Tech Electronics QMBox User Manual operation mode o Typical input capacitance in any 25 pF smese OO Typical common mode rejection 75 dB r Typical crosstalk for input signal 10 kHz with channel switching frequency 2 MHz Input overvoltage protection Permanent overvoltage 10 sec Impulse 1 ms Figures below show typical characteristics of a QMS20 module Harmonic distortion noise in the fanc band the graph of Crosstalk dependency towards channel switching frequency Noise in the fapc band fanc 3MHz 15 R Tech Electronics QMBox User Manual Harmonic distortion Input signal sine wave 10 kHz 5V fapc 3MHz Crosstalk dB 0 1 2 3 Frequencies of channel switching MHz Crosstalk dependency towards channel switching frequency 16 R Tech Electronics QMBox User Manual 5 3 2 Connecting to the object The input port of the QMS20 module is described in the table where Xn non inverting and Yn inverting inputs of the differential channel n NC the pin is reserved Flo aj o 1m 23 NC 24 SYN synchronization nou e meo oS eo mo oS oo meo o ooo S A The analogue inputs of the QMS20 module are differential Differential connection of a signal source reduces the level of common mode noise Besides differential inputs
21. s described in the table where Xn and Yn inputs of the discrete channel n NC the pin is reserved eee See X16 input Y16 input X15 input Y15 input X14 input Y14 input e me oS e oma oO s enma SSS 1 Nominal value of input voltage is specified by the customer when ordering Custom made versions with other voltage values are available 24 R Tech Electronics QMBox User Manual 5 6 QMS75 relay switching module QMS75 is a relay switching module It has 8 independent galvanically isolated relays e High max switching voltage current up to 400 V 5 A per channel e High voltage galvanic isolation of relays 3 kV e Channel to channel galvanic isolation 5 6 1 Specifications Mumberofrelays Ooo O Galvanic isolation of relay 3 kV Channel to channel 750 V 5 6 2 Connecting to the object Default contact configuration after power on of each relay gy E E i i E Tan The port of the QMS75 module is described in the table where NC the pin is reserved 25 R Tech Electronics QMBox User Manual eee See 6 Tekes oOo e Teres OOOO o kerey ooo A 6 S series ADC submodules S series submodules are single channel AD Converters designed for measurements with channel to channel galvanic isolation including those for interrogating of remote industrial sensors thermocouples thermistors current loop sensors etc S series common specifications Sampling
22. ser Manual Crosstalk dB 0 100 200 300 400 Frequencies of channel switching kHz Crosstalk dependency towards channel switching frequency 5 1 2 Connecting to the object The input port of the QMS10 module is described in the table where Xn non inverting and Yn inverting inputs of the differential channel n NC the pin is reserved ae 6 Vidi o fe iginwt SSS C 1 Allowable potential on the SYN input is 0 3 5 V relative to the ground contacts 11 28 Analog ground is connected to USB ground inside the device R Tech Electronics QMBox User Manual D 33 The correct connection of the sources of analog signal is the most important condition of the correct operation of acquisition system which allows avoiding a lot of problems during the device operation During the connection of the sources of analog signal to the device it is necessary to keep to the following recommendations 1 Differential connection presupposes measuring voltage difference between the inverting and non inverting inputs of the channel i e differential voltage However it is necessary to remember that the voltage in relation to the analogue ground of the device on both inputs common mode voltage should not be higher than the acceptable input signal range 2 Correct connection of a signal to the differential input is always a three wire connection It is necessary to separate signal wires connected to a high impedance input
23. tarted by right clicking the Computer icon then Properties and then Device Manager 29 R Tech Electronics QMBox User Manual In the Device Manager QMBox device will appear as Unknown device You should right click on it and select Update Driver Software gt Ca IDE ATA ATAPI controllers gt IEEE 1394 Bus host controllers gt lt gt Keyboards gt JI Mice and other pointing devices gt Monitors gt AP Network adapters a Other devices p Unknoy dasiea i 1 Ports CON Update Driver Software D T Processors Disable b a Sound vid Uninstall D JE System dey and b Universal S Scan for hardware changes Properties AS After this the Found New Hardware Wizard will start up A Device Manager File Action View Help S o a 8 amp amp WS Update Driver Software Unknown Device How do you want to search for driver software Search automatically for updated driver software Windows will search your computer and the Internet for the latest driver software for your device unless you ve disabled this feature in your device installation settings Browse my computer for driver software Locate and install driver software manually You should select Browse my computer for driver software and specify the DRV folder on the included CD as the location of the driver Then you should follow the instructions of the Wizard Once the driver is successfully
24. that the voltage in relation to the analogue ground of the device on both inputs common mode voltage should not be higher than the acceptable input signal range 2 Correct connection of a signal to the differential input is always a three wire connection It is necessary to separate signal wires connected to a high impedance input from the common ground wire Thus circuit of high current through signal wires which reduces measurement accuracy is eliminated 1 Allowable potential on the SYN input is 0 5 5 V relative to the ground contacts AGND 12 R Tech Electronics QMBox User Manual 3 When several signal sources are connected to the device it is advisable that their common wires connect at one point only on the AGND pin of the input port This will eliminate formation of ground loops that are a source of extra noise 4 The unused analogue inputs should be grounded i e just to be connected with AGND pins of the input port Unused digital inputs could be left disconnected On the scheme below there are the examples of the correct connection of 1 phase and 2 phase differential signal sources to the device Note that even single phase signal sources should be connected to a differential input with three wires The single phase signal The differential signal Sources Sources xA an Yn Yn AGN DJ2 AGM D32 AGND AGND Single phase and differential connection Differential connection of a signal source reduces
25. the level of common mode noise Besides differential inputs allow connecting signal sources so that currents of signal circuits do not flow through a single wire which increases measurement accuracy Single ended input mode permits doubling the number of channels when the use of differential inputs is not required On the scheme there is the example of the correct connection of 1 phase signal sources to the module in single ended mode 13 R Tech Electronics QMBox User Manual The single phase signal sources in single ended mode Xn Yn AGND32 AGND Common ground connection scheme 5 3 QMS20 ADC Module QMS20 is a multichannel ADC module with 8 differential analog inputs e High max sampling rate one channel 3 MS s e Low input current and input capacitance in any operation mode e ADC resolution 14 bits e Two input signal ranges 5 V 0 99V programmable per channel 5 3 1 Specifications Number of input channels 8 differential Input signal range programmable 5V 0 99 V per channel Max aggregate throughput all 3 MS s channels Max sampling rate one channel 3 MS s Sensitivity at input range 5 V at input range 0 99 V Reference limiting error 0 05 Typical input current in any 1 It should be taken into consideration that the overall rate of all the modules of QMBox device cannot be higher then 10 MS s For example if QMBox device contains 4 or more QMS20 modules on
26. urement automation The QMLab suite allows you to start work immediately after the device is connected acquire process visualize and save the already calibrated data converted to the required measurement units without help of programmers or metrologists The QMLab suite includes e data recorder e oscilloscope e spectrum analyser e generator of analogue signals e primary data processing unit Primary data processing may include calibration averaging normalization in accordance with IEC for a specific type of sensor as well as a more complex mathematical processing For example for thermocouples there is an automatic software compensation of cold junction and linearization of the transfer parameter Obtained data is saved in standard text and binary formats suitable for conventional and specialized data processing programs Excel MathLAB Cool Edit pro etc The generator of analogue signals included in QMLab software suite supports all QMBox series DAC devices The program allows you to use the DAC as a multichannel generator of sinusoidal signals DC signals as well as signals of arbitrary waveforms by playing through the DAC user s binary files of arbitrary length QMLab software suite is free of charge A detailed description of the QMLab suite is given in the QMLab User Manual document that can be found on the site www daq t and on the CD supplied with the device 32 R Tech Electronics QMBox User
Download Pdf Manuals
Related Search