AH501D Users Manual
Contents
1. 3128 LEB8 1221 95 ER TRG OFFv z gt 501 User s Manual TRG example TRG r TRG 2 2 11 VER Command The purpose of the VER command is to report the firmware version currently flashed into the AH501D on board processor Examples VER example VER s r ___VER sAH501D sv 1 0 V 1 501 User s Manual 2 212 Command Table Summary Power Up ACQ Start continuous acquisition 0 Setbaudrte 460800 O Setbaudre 230400 O Setbaudrte 11520 Setbaudre 57600 Setbaudrte 38400 O Setbaudre 19200 Setbaudae GOO Query baudrate settings 2 SeectASCHmoe F Query binary mode status l CHN Set readings to only 1 channel Set readings to 2 channels Set readings to 4 channels 4 default Query channel settings 2 DEC _____ correction Deselect offset correction OFF default Query offset correction status PP _____ Read a single snapshot 7 _____ Gr Readasingesnapsot o o HVS_ Set Bias VoltageOn_ 10 Set Bias Voltage Off _ default __________ Set Bias Voltage to value value Query Bi2. nnne 23 2 2 4 4 esee 24 2 2 5 9 _ 25 2 2 6 ECEN and 26 2 2 7 Command E _ 27 2 2 8 8 4 28 2 2 9 3885 29 2 2 10 eee 30 2 2 11 Command NN 31 2 2 12 32 2 2 11 33 2 2 12 98 Table Summary 20 34 2 3 RESET E een 35 ETHERNETEODNMMENICATION DD 36 3 1 36 3 1 1 IP Address 36 3 1 2 Ethernet Module een neenon nera 39 CONNECTORS IEEE 43 4 1 POWER CONNECTOR t eee e RE I ei PU ERE RO DOE ERE 43 4 2 AUXILIARY CONNECTORS esere kaiene
3. XPot Address http 140 105 8 100 80 NTSONI lt XPort 03 firmware v6 1 0 0 AN M A LANTSONIX 32 1401058100 Adialog window asking for user name and password will appear simply click on the OK button 501 User s Manual e The Lantronix web server interface will now appear Lantronix Devicelnstaller 4 1 0 3 Ele Edit View Device Tools Help Pee Search Assign IP Upgrade 5 Lantronix Devices 1 device s Device Details Web Configuration Telnet Configuration Local Area Connection 140 105 8 160 Port 27140 105 8 100 80 Extemal Browser im 03 firmware v6 1 0 0 Se 140 105 8 100 Firmware Version 6 1 0 0 MAC Address 00 20 4A 93 F6 86 Home Network XPort Server Serial Tunnel Hostlist Apply Settings Apply Factory Defaults Device Server Configuration Manager Version 1 3 0 0 Click on the Network button and set the Subnet Mask to 255 255 255 0 then click on the OK button B Lantronix Devicelnstaller 4 1 0 3 File Edit Device Tools Pee Search Assign IP Upgrade E Bi Lantronix Devices 1 device s Device Detaile Web Configuration Telnet Configuration Local Area Connection 140 105 8 160 xPot Address http 77140 105 8 100 80 Extemal Browser lt 03 firmware v6 1 0 0 AN E
4. 5010 4 Channel Bipolar Picoammeter Bias Voltage Source ee V2 Geor or Science A IUBET ITH BIAS VOLTAGE vor e Tere RANGE na 282 n E All Rights Reserved CAENels Rev 1 3 September 2012 This product uses technology licensed by Sincrotrone Trieste S C p A uum e elettra This product is certified Q CAENels d o o Kra ka ulica 2 6210 Se ana Slovenija Mail info caenels com Web www caenels com Table Of Contents 1 5 INTRODUCTION 5 1 1 THE AH501D PICOAMMETER 5 1 2 THE 501 AT A 6 1 3 FEATURE Sherin 7 1 4 ANALOG VOLTAGE MONITORS ati aea Ea EEA A 8 1 5 BIAS VOLTAGE SOURCE 4 5 sees ore aere e 9 1 6 DATA FORMAT ea ia ri 10 1 7 SAMPLING nns 12 1 8 OFFSET CALIBRATION 14 SOFTWARE COMMANDS esee eee eese ense 16 2 1 COMMAND SYNTAX 16 2 2 LIST OF COMMANDS __ 18 221 19 2 2 2 22 2 2 3
5. nene ettet eterna asse seen nette nns 43 4 2 1 The TRIGGER GATE Signal esses nennen enne 44 4 22 The CONV 44 4 3 HARDWARE RESET 45 TECHNICAL SPECIPICA TIONG 46 Document Revision Date Comment March 10 2012 April 16 2012 Layout update 1 2 September 10 2012 Data on sampling period corrected September 17 2012 Safety information Read the instruction manual carefully prior to using the instrument The following precautions should be strictly followed before using the 501 Do not use this product in any manner not specified by the manufacturer The protective features of this product may be impaired if it is used in a manner not specified in this manual Do not use the device if it is damaged Inspect carefully the outer case for possible cracks or breaks before each use Do not operate the device if explosive gases vapours or excessive dust is present e Always use the device with its original cables e Power off the device before establishing any connection to from it Do not operate the device for any reason with side covers removed or loosened Do not install substitute parts or perform any unauthorized modification to the product Return the product to the manufacturer for service and repair to ensure that safety features are mainta
6. 3153 MONITOR Hardware Reset CONV Bias Voltage Bias Voltage LED ouput TRIGGER Output Communication Status LED input Interface Figure 2 the AH501D rear panel and its I O connections 501 User s Manual 1 3 Features The 501 input stage is based on multi path inverting transimpedance amplifier I V converter cascaded with particular signal conditioning stages Three measuring ranges are available as reported in the following table Full Scale RNG 0 2 5 mA RNG 1 2 5 pA 2 2 5 The corresponding gain values for these three input ranges Gain V A RNG 0 10 RNG 1 10 RNG 2 10 The maximum and minimum currents that can be measured with the AH501D are reported along with the LSB resolution for each range in the following table Full Scale Resolution Resolution 16 bit 24 bit RNGO 2 5 76 nA 298 pA RNG1 2 5 76 298 fA RNG2 2 5 nA 76 fA 298 aA A host PC is necessary in order to operate the AH501D and properly set check the desired parameters e g range and resolution bits and to acquire the converted data Please refer to the Software Commands chapter for a complete description of available commands their purposes and their syntax 501 User s Manual 1 4 Analog Voltage Monitors Each input channel of the AH501D picoammeter has its corresponding analog voltage monitor signal available on a LEMO coaxial connector These fou
7. 1 n 0 gt AHS0ID User s Manual 2 2 5 DEC Command The DEC command can only be used when working in BIN OFF mode i e data is transmitted as ASCII characters and is a function that if enabled performs the two s complement offset correction directly on the AH501D processor If this offset correction is enabled data values are sent in the usual ch2 ch3 ch4 v format with a hexadecimal representation 003234 2 185 1215 LECO7 s66A60A An when working in 24 bit resolution mode data width is 6 byte sample 0032 sF185 s5 LEC s66A6 n when working in 16 bit resolution mode data width is 4 byte sample This feature is disabled DEC OFF at device power up Examples DEC example DECS ONV gt ACK n DEC example DEC s r DEC sON V n a 25 501 User s Manual 2 2 6 and Commands The purpose of the GET command is to read back a single snapshot of the values for the active channels The G command is a useful shortcut fully equivalent to the command and it is implemented to further reduce delays caused by data transmission and handling The format of the returned values depends on the binary mode setting refer to BIN Command paragraph the resolution settings and the active channels settings Examples GET example with ASCII data 5 _448231 54 3567 59 803 5711996 example with ASCII data Gv _44
8. OK a Ready e Click on the Serial Settings button Set the Baud Rate to 921600 and the Flow Control to None Click on the OK button Pi Lantronix Devicelnstaller 4 1 0 3 File Edit View Device Tools Help Search Assign IP Upgrade y Lantronix Devices 1 device s Device Details Web Configuration Telnet Configuration Local Area Connection 140 105 8 160 27140 105 8 100 80 Gi Extemal Browser 2 XPort 03 firmware v6 1 0 0 3e 1401058100 LANTSON IX Firmware Version 1 0 0 MAC Address 00 20 4A 93 F6 86 Serial Settings Network Server Channel 1 buic ge Disable Serial Port ostiis Channel 1 Port Settings Protocol RS232 Connection Email Baud Rate 921600 YD Data Bits 8 Parity None 7 Stop Bits 17 Trigger 1 Trigger 3 Pack Control Configurable Pins Enable Packing Apply Settings 19 Gap Time 12 msec Match 2 Byte Sequence Yes No Send Frame C Yes No Match Bytes sin 0800 Send Trailing Bytes None C One C Two e Flush Mode Flush Input Buffer Flush Output Buffer With Active Connect C Yes No With Active Connect C Yes No With Passive Connect C Yes No With Passive Connect C Yes No AtTime of Disconnect C Yes No AtTime of Disconnect C Yes No 41 501 User s Manual e Click
9. see section 2 3 for further details 501 User s Manual 5 Technical Specifications Input Channels 4 Current Measuring Range from 2 5 nA to 2 5 mA Voltage Monitors Yes 5 V Current Polarity bipolar Data rate up to 26 ksamples s Resolution Bits 16 or 24 RMS Noise 9 RNG2 Cin 5pF 120 fA typ Bias Voltage RMS Noise 0 0005 Communication Ethernet 10 100 TCP IP and UDP T O Signal E CONV onpa Supply Voltage from 6 V to 15 V Bias Voltage Output 0 to 30V Dimensions 155 165 x 50 mm Weight 580 g Input Connectors BNC Voltage Monitor Connectors LEMO Status Indicators 5 LEDs 46
10. 2 1 ACQ Command The purpose of the ACQ command is to start stop the acquisition from the 501 The instrument starts to acquire data as soon as the command is received and immediately sends the generated digital data stream to the host PC At power up the instrument boots with the acquisition stopped default the user is required to start the data acquisition sending the ACQ ON command The type of transmitted data depends on the setting of the binary mode and can be changed using the BIN command see BIN Command paragraph With BIN OFF data is sent in ASCII mode with the format ch1 ch2 ch3 ch4 r n with a space between each channel value 2F1234 s9A85 12 s IA4ES5E0N548423V1 J fll OF Chi Space Ch2 Space Ch3 Termination characters With BIN ON default digital values are transmitted as a continuous binary data stream without any termination or control character For this reason it is important to keep synchronization with the data flux otherwise it is possible if some bytes are missed to corrupt the data and to get false readings from the instrument If this happens acquisition must be stopped with the S without carriage return command and then restarted increasing the reliability of the communication channel The speed of data transmission is directly related to the number of active read channels and the resolution of data samples In binary mode 4 channels and a 24 bit res
11. 6 10 Extended Firmware Version 51 00 Devices 1 Device Details web Configuration Telnet Configuration g Local Area Connection 140 105 8 150 Port Py B s XPort 03 firmware v6 1 0 0 Property Name Group Comments Device Family Port Type XPort 03 ID x5 Hardware Address 00 20 44 93 F6 86 Firmware Version Extended Firmware Version 6 1 0 0 37 501 User s Manual e Select Assign a specific IP address and then click Next Assign IP Address Assignment Method Would you like to specify the IP address or should the unit get its settings from a server out on the network Obtain an IP address automatically Assign a specific IP address Tutorial Next gt Cancel Help e Set the IP address Click Next S Assign IP Address IP Settings Please fill in the IP address subnet and gateway to assign the device The subnet will be filled in automatically as you type but please verify it for accuracy Incorrect values in any of the below fields can make it impossible for your device to communicate and can cause network disruption IP address 192 168 10 200 2 Subnet mask NU Default gateway 0 0 0 Configuration information is not available For this device The subnet mask and default gateway will not be able to be set After the IP Address has been set successfully then return to this Assi
12. 844 8 us 1 0752 ms 4 Channels 1 6896 ms 2 1504 ms Sampling periods when receiving ASCII formatted data with offset binary 275 complement correction and the sampling frequencies the following ones 16 bit Resolution 24 bit Resolution 1 Channel 2 367 kHz 1 860 kHz 2 Channels 1 184 kHz 930 1 Hz 4 Channels 591 9 Hz 465 0 Hz Sampling frequencies when receiving ASCII formatted data with offset binary 275 complement correction 501 User s Manual 1 8 Offset Calibration Due to the internal bias and offset voltages of its electronic components an offset calibration in order to eliminate the equivalent input offset current must be performed on each AH501D module If a precise estimation of this offset is necessary the following procedure must be performed Install on each BNC a shielding cap in order to avoid noise pick up be aware that the central input pin must be left open and shielded but not grounded otherwise the read values are meaningless Switch on the AH501D Letit warm up for about 15 minutes Acquire a set of data for example 10000 pts from each input channel and calculate the mean value Repeat the previous step for each gain range RNG 0 RNG 1 and RNG 2 The calculated mean values are the new Data Offsets that must be taken into account in the current evaluation formula that must be applied for each channel It may be preferable in some cases to calculate this offset as the median of
13. housed in a light robust and extremely compact metallic box that can be placed as close as possible to the current source detector in order to reduce cable lengths and minimize possible noise pick up It is specially suited for applications where multi channel simultaneous acquisitions are required a typical application being the currents readout from 4 quadrant photodiodes used to monitor X ray beam displacements The AH501D communication is guaranteed by a standard Ethernet TCP IP and UDP 501 User s Manual 1 2 The AH501D at a Glance The AH501D picoammeter and its I O connections can be easily seen in Figure 1 front and Figure 2 rear Voltage Monitors E e 4 3m gt AR Ti iL p BIAS S VOLTAGE Measuring Range LEDs Input Channels Figure 1 the AH501D front panel and its I O connections Analog BNC current input connectors and LEMO voltage monitor ones are placed on the front panel of the device while the other available connections i e power input communication socket trigger input conversion output bias voltage output and ground connection are placed on the rear panel The reset button accessible only with a thin pen tip or a needle and the status LEDs are also accessible from the rear panel of the instrument Ground connection N f AN Power Connector EN mias 52 CONV I STATUS G IN OUT
14. values of RMS Root Mean Square noise are of 0 000596 at rated output voltage value this noise value was 0 003 for the old AH501C version An AC coupled waveform of the bias voltage set at a 30V output level is shown in the following figure where RMS noise ripple is less than 0 000396 Bias Voltage Ripple Noise V AC Bias Voltage V 0 02 0 04 0 06 0 08 0 1 0 12 0 14 0 16 Time s The BIAS voltage output is protected against short circuits on its outputs and the corresponding short circuit current value for this output is 3mA Please note that the output impedance of this voltage source is 10kQ and the minimum time constant is 100 ms it increases along with the load capacitive part 501 User s Manual 1 6 Data Format Since the AH501D has three different input gain values and two possible resolution modes 16 and 24 bit output values depend on the selected configuration For this reason it is important to properly set the gain value in order to avoid input stage saturation and corresponding data clipping of the output values to 8388608 or to 8388607 in 24 bit resolution mode and to 32768 or to 32767 in 16 bit resolution mode Moreover it is very important to perform an offset calibration procedure before using the picoammeter In the following table the correspondence between the read value and the full scale range is reported note that the input stage is inverting Data Val
15. 20xFA0x590x000x020xFEA 0x59 S example with ASCII data _1 3321 542 203 5321822 503 13312A s13295 1 s1BB342 s112721 n n 0 gt AHS0ID User s Manual S example with BINARY data 0X000x020xFA0x590x000x020x FA0x590x000x020xFA0x590x000x020xFA0x59 5 2 example ACQ s r E ACQ OFF lt lt 21 501 User s Manual 2 2 2 BDR Command The purpose of the command is to set the baudrate between the AH501D and the communication module The following table shows the allowed baudrates Command Baudrate BDR 921600 921600 BDR 460800 460800 BDR 230400 230400 BDR 115200 115200 BDR 57600 57600 BDR 38400 38400 BDR 19200 19200 BDR 9600 9600 Since the instrument changes the baudrate right after the BDR command is accepted and the acknowledgement string ACK is sent back to the host The user can verify successful execution of the command sending another command after changing the host baudrate e g The baudrate change procedure strictly depends on the communication interface module used Please refer to the Communication Module Interfaces chapter for more information By default the instrument boots with a 921600 baudrate setting Examples BDR example with incorrect parameter BDR s960000 r BDR example with correct parameter BDR s9600 r j ACK n Acknowledgement from the AH501 before the change of baudra
16. 8231 54 567 59 803 5 711996 2 example with binary data GET s r 0x000x020xFA0x590x000x020xFA0x590x000x020xFA0x590x000x020xFA0x59 example with binary data Gy 0x000x020xFA0x590x000x020xFA0x590x000x020xFA0x590x000x020xFA0x59 gt AHS0ID User s Manual 2 2 7 HVS Command The HVS command let the users set and read the Bias Voltage output status value It is necessary to enable the bias voltage circuitry first in order to set a voltage value i e send the command HVS The red LED on the AH501D rear panel should turn on The command HVS OFF disables the bias voltage output putting it in an high impedance state and turns off the BIAS ON LED on the rear panel The voltage value up to 30V can be set by sending a command to the AH501D where xx xx is the desired voltage value in Volts It is also possible to check the bias voltage circuitry status by sending a HVS command Please note that the Bias voltage resolution on its setting is about 0 025 of its full scale value i e BIAS setpoint can be changed by minimum steps of 7 mV Examples HVS example HVSW r HVS OFF HVS ON example HVS value example HVS s19 22 r ACKVNi HVS example HVS s r HVS 19 22 501 User s Manual 2 2 8 Command The purpose of the NAQ command is to read a
17. IGGER input starts the acquisition of the picoammeter As soon as the TRG IN line is driven low again the acquisition stops and no more data is sent to the host This behavior continues until the trigger mode is disabled by software The input voltage level is 5V TTL and CMOS compatible Ground TRIGGER input TTL signal Figure 5 Trigger input connector 4 2 2 The CONV Signal The CONV signal is an output signal that toggles at every conversion cycle from the internal ADCs For example with an Integration Time of 100ms the CONV output will be a square wave with the half period equal to 100ms It can be used as a monitor of the internal timing or as synchronization signal for external devices The output voltage level is 5V TTL and CMOS compatible with a minimum output current of 24mA Ground CONV output TTL signal CONV OUT Figure 6 CONV output connector AHS0ID User s Manual 4 3 Hardware Reset An hardware reset of the AH501D picoammeter can be performed by pushing the RESET button accessible with a thin pen tip or a needle through a small hole on the rear panel of the device Figure 7 Reset Button Figure 7 Hardware reset button Once the RESET button has been pressed and released the AH501D internal processor re initializes reloading its firmware from the FLASH memory and starts operation again Performing this reset operation is equivalent to executing the Remote Hardware Procedure
18. as Voltage Status _____ Read a fixed number of samples 1 2000000000 RES Set resolution to 16 bits 6 TOTE EEEE RNG _____ Set Full Scale Range llImA O defaut SetFull Scale Range to 644A I SetFull Scale Range to 2 5nA 2 _____ S Stops continuous acquisition default SYNv Synchronize internal ADCs TRG _____ Enable trigger gate input Disable trigger gate input default Query trigger mode status VER Query firmware version l O Table 1 List of Commands summary AHS0ID User s Manual 2 3 Remote Hardware Reset An hardware reset of the AH501D device can be performed remotely by following the herein presented procedure This operation is equivalent to performing an hardware reset as explained in section 4 3 The procedure to remotely reboot the module is the following A connect to the AH501D picoammeter module IP address to port 30704 hex 2 77F0 B write to the module port the following nine bytes one at a time i e one for each packet 27 i e byte Ox1B 7 i e byte 0x07 0 1 byte 0x00 0 1 byte 0x00 0 1 byte 0x00 3 i e byte 0x03 0 1 byte 0x00 0 1 byte 0x00 0 1 byte 0x00 C wait for 500ms and then write to the module port the following nine bytes one at a time i e one for each packet 27 i e byte Ox 1B 7 i e byt
19. collected data to avoid errors caused by unwanted rectified impulsive noise r 0 gt AHS0ID User s Manual 1 9 AHS01C Compatibilty The 501 bipolar picoammeter is completely compatible as command set to the CAENels AH501C Moreover the AH501D has some additional features respect to its predecessor active measuring range LED indicators on the front panel ground connection available on the rear panel hardware reset button accessible through a small hole in the rear panel 501 User s Manual 2 Software Commands This chapter describes the software commands used for tuning and readout of the AH501 picoammeter 2 1 Command Syntax The command syntax used by the AH501 protocol is described in the following paragraphs Commands must be sent in ASCII format and are composed by two fields the command field and the parameter field separated by a space s or 0x20 in hexadecimal notation Instructions are not case sensitive and therefore the command string can freely use either uppercase or lowercase characters Each instruction is terminated with a carriage return character W or OxOD e g i Command field Space Parameter field Termination character There are two types of software commands configuration commands and query commands The query commands usually have the same command field as the configuration commands a in the paramete
20. e 0x07 0 1 byte 0x00 0 1 byte 0x00 0 1 byte 0x00 0 1 byte 0x00 0 1 byte 0x00 0 1 byte 0x00 0 1 byte 0x00 O O D now the device should reboot re load the firmware from its internal FLASH memory and will be ready for operation in about 2s It is important to notice that after executing point C connection to ort 30704 must be closed and in order to correctly operate the icoammeter again a new connection to AH501D module IP address standard port i e 10001 must be established O9 501 User s Manual 3 Ethernet Communication This chapter describes the Ethernet communication module for the AH501D and gives hints on how to configure it 3 1 Communication Module The communication module is based on the Lantronix Xport amp embedded Ethernet device server To properly configure the Xport device the user must configure the IP address the communication protocol and all other network parameters needed by the AH501D Please refer to the Xport documentation and configuration software available at the Lantronix site www lantronix com for a complete description 311 IP Address Assignement The module is shipped with a default IP address Factory settings are IP address 192 168 0 10 port 10001 Before assigning a new IP address it is required to install on the host PC the Devicelnstaller software that can be downloaded from t
21. fixed number of samples ranging from 1 to 2000000000 without having to manually stop the acquisition i e with the S command when the desired number of samples has been read The format of the returned values depends on the binary mode setting refer to BIN Command paragraph the resolution settings and the active channels settings Examples NAQ example with ASCII data NAQ s12 r 44823 1 s4A3567 s9EE222 s714596 1 448234 s4A3976 s9EE323 s711912 n 448566 s4A3433 s9E1LA10 s714955 n 448243 s4A3567 s9EE803 s71A 116 441332 54 3555 59 4543 5711888 448231 54 65 59 5802 5710990 44823 1 54 5 4 59 2 5 5711946 44843 1 54 1111 59 661 571 750 448230 54 342 1 59 13 5713216 44800 1 s4CC569 s9EE663 s71432C 1 448234 s4AB45 1 s9E124A s71BOBO A n 248324 54 6564 59 732436 28 AHS0ID User s Manual 2 2 9 RES Command The purpose of the RES command 1 to select whether to use 16 bits or 24 bits to represent sampled values obtained from the on board delta sigma modulator ADCs The use of this feature determines the maximum data transfer rate of the AH501D when running in continuous mode i e ON and BIN The default value at power up is set to 24 bits Examples RES example RES s24 r RES 2 example RES s r RES s16 1 501 User s Manual 2 2 10 Co
22. gn IP Address wizard to set the subnet mask and default gateway lt Back Next gt Help e Click the Assign button Assign IP Address Assignment Back Finist e Wait for the assignment procedure to end then click Finish The new module IP address should now be already assigned and the success of the operation can be verified on the Devicelnstaller window C 501 User s Manual 3 1 2 Ethernet Module Software Configuration After assigning the IP address the user must configure some other parameters on the XPort device There are two possible ways to configure such parameters e the web server interface e alelnet connection In this manual only the web interface procedure is described if you need to configure the module using a telnet connection please refer to the XPort user guide E Follow the next instructions to properly setup your AH501D communication module e Select the Web Configuration tab and then click on the Go button Be sure to disable the proxy server option in your Internet Options application To do so go to the Control Panel folder open the Internet Options then click on the Connections tab go to the LAN settings and then deselect the Use a proxy server for your LAN option Ee Device Details Web Configuration Telnet Configuration s n 140 105 8 160
23. he Lantronix website www lantronix com Even if the AH501D can be connected to the global LAN a point to point Ethernet connection is strongly recommended in order to obtain minimum delay maximum speed performance and to avoid possible communication problems This implies that the host PC and the AH501D should reside on the same Ethernet subnet e g Host PC address 192 168 10 100 AH501D address 192 168 10 200 Please note that for a point to point direct connection a twisted Ethernet cable must be used z O AHS0ID User s Manual The next few steps must be followed in order to assign a new IP address to the module Connect the host PC and the AH501D with a twisted Ethernet cable e Switch on AH501D e Verify that the Link LED on the RJ45 connector is turned on amber for a 10Mbps connection or green for a 100Mbps connection and the corresponding Network Connection is active on the host PC The Link LED e Launch the DeviceInstaller program Select the XPort device where you want to change the IP address S Lantronix Devicelnstaller 4 1 0 3 Dor File Edit Device Tools Help PA Search Assign IP Upgrade 55 Lantronix Devices 1 5 Device Details web Configuration Telnet Configuration G g Local Area Connection 140 105 8 160 e Property Name Group Comments Device Family Port Type XPort 03 ID Hardware Address 00 20 44 93 F6 86 Firmware Version
24. i a i LANTSONIX 32 1401058100 LANT3ON IX Firmware Version V6 1 0 0 MAC Address 00 20 4 93 6 86 Network Settings IP Configuration C Obtain IP address automatically Auto Configuration Methods BOOTP Enable Disable DHCP Enable C Disable AutolP Enable Disable DHCP Host Name Use the following IP configuration IP Address 140 105 8 100 Subnet Mask 255 255 255 0 Default Gateway 0 0 0 0 Ethernet Configuration JV Auto Negotiate Speed 100 Mbps C 10 Mbps Duplex Full Half 40 501 User s Manual e Click on the Server button Set the CPU Performance Mode to High and then click on the OK button Ele Edit View Device Tools Help E Bi Lantronix Devices 1 device s Device Details Web Configuration Telnet Configuation O OOOO Local Area Connection 140 105 8 160 Address http 140 105 8 100 80 5 BERNER lt 03 firmware v6 1 0 0 AR M Q LANTSONIX Se 1401058100 LANT3ON IX Firmware Version V6 1 0 0 MAC Address 00 20 4 93 6 86 Server Settings Server Configuration Telnet Password Retype Password Advanced ARP Cache Timeout secs TCP Keepalive secs 45 00 Monitor Mode Bootup Enable Disable CPU Performance Mode HTTP Server Port MTU Size 1400
25. ined CAUTION e This instrument is designed for indoor use and in area with low condensation iii The table below reports the general environmental requirements for the instrument Environmental Conditions Requirements Operating Temperature 0 to 55 Operating Humidity 20 to 85 RH non condensing Storage Temperature 20 to 70 Storage Humidity 596 to 9096 RH non condensing AHS0ID User s Manual 1 Introduction This chapter describes the general characteristics and main features of the AHS501D picoammeter 1 1 The AH501D Picoammeter CAENels 5010 is a 4 channel 24 bit resolution wide bandwidth ultra wide input dynamic range picoammeter with an integrated bias voltage source ranging from to 30V It is composed of a specially designed transimpedance input stage for current sensing combined with analog signal conditioning and filtering stages making use of state of the art electronics This device can perform bipolar current measurements from 2 5 nA with a resolution of about 300 aA up to 2 5 mA resolution of 300 pA with sampling frequencies up to 26 kHz for 1 channel and a 16 bit resolution and 6 5 kHz 4 channels 16 bit sample Low temperature drifts good linearity and very low noise levels enable users to perform very high precision current measurements This new version has also buffered voltage monitors that are proportional to the measured input current The AHS501ID is
26. mmand The purpose of command is to set the gain and therefore the full scale range of the AH501D The parameter field is a number representing the selected gain range as reported in the following table Resolution Full Scale 24 bit RNG 0 2 5mA 298 nA RNG 1 2 5 298 fA RNG 2 2 5 nA 298 aA The parameter value can be set from 0 to 2 at power up the AH501D range is set to its lowest gain value 0 default in order to avoid possible damages to the device in case some of its inputs are connected to a high current source sink at start up Examples RNG example for a 2 5nA Full Scale Range RNG s2 r ACK n RNG example for a 2 5mA Full Scale Range RNG sO r RNG example RNG s v ACK r n 0 30 501 User s Manual 2 2 11 SYN Command The purpose of the SYN command is to synchronize the four on board analog to digital converters The task performed by this command is automatically executed at device power up and shall not be performed again when using the AH501D device This is a command to be used only for debugging purposes 31 501 User s Manual 2 2 12 The purpose of the TRG command is to enable disable the trigger gate input of the AHS501D This feature when enabled TRG ON is useful when the picoammeter data acquisition must be synchronized to an external event for instance laser pulses The trigger mode
27. olution the data output format consists of a continuous sequence of 12 bytes 96 bit packet three bytes for each channel since each channel sample is 24 bit wide MSB first MSB LSB MSB LSB MSB LSB MSB LSB 0x000x010xFA0x000x000x1 A0x220x000x020xFFOx 1 A0x00 Chl Ch2 Ch3 Ch4 In binary mode with 4 active channels and a 16 bit resolution the data output format consists of a continuous sequence of 8 bytes two bytes for each channel MSB first MSB LSB MSB LSB MSB LSB MSB LSB 0x200x01 0xFA0x320x0A0x1A0 1 A0x220x5 1 Chl Ch2 Ch3 501 User s Manual In binary mode with only 1 active channel and a 24 bit resolution the data output format consists of a continuous sequence of 6 bytes 48 bit packet MSB LSB MSB LSB 0x200x01 0 0 32 Chl Ch2 Please note that no acknowledgement string is sent back to the host after an ON command while an command is returned after the acquisition 15 stopped with S command Data packet sizes which also define the maximum data rates are listed in the following table 16 bit Resolution 24 bit Resolution 1 Channel 2 bytes 3 bytes 2 Channels 4 bytes 6 bytes 4 Channels 8 bytes 12 bytes Examples ON example with ASCII data ACQ sON r FF3524 s12E001 s126A52 s03FE4 1 1C3133 s141991 s1BB342 s 542720 gt ON example with BINARY data ACQ sON r 0x000x020xFA0x590x000x020xFA0x590x000x0
28. on the Connection button Set the Protocol to and the Local Port to 10001 this value can be changed as needed Click the button S Lantronix Devicelnstaller 4 1 0 3 Bile Edt View Device Tools Help Search Assign IP Upgrade Bi Lantronix Devices 1 device s Device Details Web Configuration Telnet Configuration gfg Local Area Connection 140 105 8 160 T erat Address http 2 140 105 8 100 80 Entomal Brower lt XPort 03 firmware v6 1 0 0 A N da htp 77140 105 8 100 00 3e 1401058100 LANTSON IX Firmware Version V6 1 0 0 MAC Address 00 20 4A 93 F6 86 Connection Settings Network E Channel 1 Serial Tunnel Connect Protoco Protocol ns Connect Mod Passive Connection Active Connection Accept Incoming Yes Active Connect None zl Password Required Yes No Start Character 000 Configurable Pins Password Modem Mode None bd Apply Settings Mam Esc Sei Pass Yes C No Apply Factory Defaults Endpoint Configuration Local Port 10001 T Auto increment for active connect Remote Port Remote Host Common Options Telnet Mode Disable v Connect Response None 5 Terminal Name Use Hostlist C Yes No LED Blink Disconnect Mode Sn puis a Cyes No Hard Disconnect Yes No CheckEOT Ct D y C Yes No Inactivity Timeou
29. operation is described hereafter As soon as the TRG ON command is received the AH501D stops the acquisition and waits to receive on the corresponding TRIGGER GATE pin see Connectors chapter a trailing edge signal transition As soon as this is detected the AH501D starts to acquire data and to continuously send them to the host data are sent to the host as long as the TRIGGER GATE signal is kept in high state As soon as a falling edge signal transition i e signal goes to low level state is encountered the acquisition stops and no more data are sent to the host This behavior continues whether until the trigger mode is disabled with the TRG OFF default command see TRIGGER GATE Signal paragraph in the I O Connectors chapter or the driving signal is kept at low level Please note that an acknowledgement string is sent back to the host after a TRG ON or TRG OFF command The format of the data sent depends on the BIN CHN RES and DEC settings previously configured for the picoammeter Activating the trigger mode TRG while the trigger gate input pin on the I O connector is not driven has no effects Examples TRG example with ASCII data TRG ON r ACKVNi TRIGGER GATE pin signal 3124 IF01 1222 OAAC n 3133 1804 1552 0 TRIGGER GATE signal pause TRIGGER GATE pin signal 3134 1E21 1332 E
30. r field The AH501D after each received command replies with a string whose content depends on the type of command sent and its correctness There are three possible scenarios with some exceptions as described in the corresponding command paragraph 1 the command syntax is incorrect the AH501D will always answer with the string terminated with carriage return line feed characters or in hexadecimal notation e g BIX sON r r gt AHS0ID User s Manual example 2 BIN sOOG r NAK V n 2 the command syntax is correct and it is a configuration command the AH501D will answer with the string terminated with carriage return line feed vw characters e g E BIN sON r 2 RES s24 r 3 the command syntax is correct and is a query command the AH501D will answer with the echo of the command field and the value of the requested parameter separated with a space and terminated with carriage return line feed characters e g BINW y BINSONV Wi example 2 2 501 User s Manual 2 2 List of Commands Please find hereafter the command list used by the AHSOID and the corresponding syntax the description of each command purpose and any special requirements relating to specific commands 0 AHS0ID User s Manual 2
31. r signals are true analog buffered independent inverting stages and are directly proportional to the input current value with a full scale range of 5V These voltage monitors being inverting themselves automatically compensate for the input stage inversion so that positive output voltage values correspond to input current sources positive currents and negative output values to input current sinks negative currents Gain values for the three input ranges in V A are presented in the following table GAIN Vour lin D IO GENGI 2 10 Grice 2 10 For example if a tester oscilloscope connected to a channel voltage monitor measures a value of 1 500V and the AH501D is set on RNG 1 the corresponding input current for that channel is _ _ 15 V 750nA IN 2 108 hs A AHS0ID User s Manual 1 5 Bias Voltage Source A low noise voltage source is also available on a BNC connector placed on the module rear panel This voltage source is ground referred it can be set remotely and has a maximum output value of 30V It is also possible to disable this source by a specific command HVS OFFV and set the output to a high impedance state thus disconnecting the voltage source from the connected load The red BIAS ON LED placed on the rear panel acts as a status indicator for this voltage source it turns on when output is enabled and turns off as soon as the output is disabled Typical
32. st of Commands chapter to see how to set these values When receiving a non formatted binary data stream the sampling periods for each channel are represented in the following table 16 bit Resolution 24 bit Resolution 1 Channel 38 4 us 76 8 us 2 Channels 76 8 us 153 6 us 4 Channels 153 6 us 307 2 us Sampling period when receiving raw binary data corresponding to the following sampling frequencies 16 bit Resolution 24 bit Resolution 1 Channel 26 042 kHz 13 021 kHz 2 Channels 13 021 kHz 6 510 kHz 4 Channels 6 510 kHz 3 255 kHz Sampling frequencies when receiving raw binary data The sampling periods dilate when working with ASCII data values that require computational time to be formatted reaching the values here listed 16 bit Resolution 24 bit Resolution 1 Channel 384 us 499 2 us 2 Channels 806 4 us 998 4 us 4 Channels 1 6128 ms 1 9968 ms Sampling frequencies when receiving ASCII formatted data The corresponding sampling frequencies for each channel in this mode are then 16 bit Resolution 24 bit Resolution 1 Channel 2 604 kHz 2 003 kHz 2 Channels 1 240 kHz 1 002 kHz 4 Channels 620 0 Hz 500 8 Hz Sampling frequencies when receiving ASCII formatted data 12 AHS0ID User s Manual Adding the offset binary two s complement correction DEC ON command see section 2 2 5 for additional information the sampling periods become 16 bit Resolution 24 bit Resolution 1 Channel 422 4 us 537 6 us 2 Channels
33. t 0 __ 0 secs e Click the Apply Settings button The XPort Ethernet device should now be correctly configured to work with the AH501D picoammeter If you need to change any other XPort parameter please refer to the XPort amp user s guide z gt AHS0ID User s Manual 4 I O Connectors This chapter describes the I O connectors their corresponding pinout and the each signal functionality 4 1 Power Connector The input power connector is shown in Figure 3 with its corresponding pinout The input voltage range is rated at 9V with a maximum input current of 350mA The connector type is a 6 pin DIN Pin Signal 1 2 GND 315 49V 4 6 9V Figure 3 Power Connector 4 2 Auxiliary Connectors The AH501D has two LEMO coaxial connectors for the CONV output signal and the TRIGGER input signal as shown in Figure 4 Signal levels are 5V TTL and CMOS compatible The maximum rated output current is 24mA TTL input signal TTL output CONV OUT TRG IN signal Figure 4 I O Interface Connector a a 501 User s Manual 4 2 1 The TRIGGER GATE Signal The purpose of the TRIGGER GATE signal is to synchronize the acquisition of the AH501D with external events It works in combination with the TRG command please refer to Command paragraph for more details When the trigger mode is enabled by software a rising edge signal on the TR
34. te BDR example BDR s r BDR s921600 n HM z 0 gt AHS0ID User s Manual 2 2 3 BIN Command The purpose of the BIN command is to change the format of the digital data stream generated by the AH501D picoammeter At power up binary mode is enabled BIN ON default and data is sent as a continuous binary data stream With the BIN OFF command the ASCII format is enabled and the output values are sent as strings The binary format helps to improve the data rate transmission as it avoids the overhead due to the ASCII format conversion In binary mode the data output format is a continuous sequence of bytes see Command paragraph for details Examples BIN ON example BINSONV 2 BIN s r BIN sOFF n 501 User s Manual 224 CHN Command The purpose of the CHN command is to set the number of active input channels to be sampled the AH501D provides the capability to simultaneously sample 1 2 or 4 channels Channels on which sampling is performed are indicated in the following table default power up value is CHN 4 Sampled Channels CHN s1 r Chei CHN s2 r 6 1 Ch 2 CHN s4 r Ch 1 Ch 2 Ch 3 Ch 4 The overall sampling frequency of the system is determined by the value set with this command Examples CHN example CHN s2 r example with incorrect parameter CHN s5 r CHN 2 example CHN s v CHN s4
35. ue Hex Value Input Signal 32768 0 8000 Full Scale 32769 0 8001 Full Scale 158 65535 LSB 0 0 0000 0 1 0 0001 LSB 32766 Ox7FFE Full Scale LSB 32767 Ox7FFF Full Scale Data value in 16 bit resolution mode Data Value Hex Value Input Signal 8388608 0x800000 Full Scale 0 0x000000 0 8388607 Ox7FFFFF Full Scale Data value in 24 bit resolution mode The data read from the AH501D are the raw values of the A D converter thus the data conversion from the read values to the corresponding current values must be performed by the user applying the following formula for the 16 bit resolution mode o AHS0ID User s Manual 2 FSR E Value if Value lt 32767 In 2 FSR 2 if Value gt 32768 21 1 and the following one when working in 24 bit resolution mode 2 FSR gt Value if Value lt 8388607 2 FSR gt x 224 if Value 28388608 27 1 where Tw the calculated input current FSRx the selected Full Scale Range Value the raw data value from the AH501D Please note that these formulas refer to the ideal condition of a zero offset device in real case the offset value must be taken into account when performing data conversion paragraph 1 8 for further details 501 User s Manual 1 7 Sampling Frequency The AHS501D sampling frequency depends either on resolution data stream format and number of channels please refer to Li
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