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CT-BOX

Digital Current

Measurement & Calibration System

DC Current Transducers

User’s Manual

© CAEN ELS s.r.l.

Rev. 1.4

–

March 2018

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Summary of Contents for CT-BOX

Page 2: ...CAEN ELS s r l c o AREA Science Park S S 14 km 163 5 34149 Basovizza TS Italy Mail info caenels com Web www caenels com...

Page 3: ...ATION 18 2 SOFTWARE COMMANDS 19 2 1 COMMAND SYNTAX 19 2 1 1 Data Representation 22 2 2 BASIC COMMANDS 26 2 2 1 MODE Command 26 2 2 2 GET Command 28 2 2 3 GETT Command 29 2 2 4 ACQ Command 30 2 2 5 PRI...

Page 4: ...NTERFACE 58 3 2 USB INTERFACE 59 3 2 1 Firmware Upgrade 60 3 3 POWER CONNECTOR 62 3 4 I O CONNECTOR 63 3 4 1 External Temperature Sensor 64 3 5 DCCT CONNECTOR 65 3 6 ANALOG OUTPUT 65 3 7 SD CARD SOCKE...

Page 5: ...015 Draft release 1 0 January 28th 2016 First Release 1 1 December 23rd 2016 Address Changed 1 2 February 8th 2017 New technical specifications added as from recent tests 1 3 December 10th 2017 New fe...

Page 6: ...ny part of the instrument WARNING Do NOT open the boxes CAEN ELS s r l declines all responsibility for damages or injuries caused by an improper use of the Device due to negligence on behalf of the Us...

Page 7: ...ged Before you use the device inspect the instrument for possible cracks or breaks before each use Do not operate the device around explosives gas vapor or dust Always use the device with the cables p...

Page 8: ...nvironmental requirements for a correct operation of the instrument Environmental Conditions Requirements Operating Temperature 10 C to 40 C Operating Humidity 30 to 85 RH non condensing Storage Tempe...

Page 9: ...order to have temperature dependence lower than 1 ppm K The digital section interfaced to the ADC performs a calibrated measurement in order to drastically reduce the non ideal behavior thus providing...

Page 10: ...nd communication connectors are placed on the front side of the CT BOX unit The power button is used to switch on or switch off the device This switch does not fully disconnect the device from the mai...

Page 11: ...tes that the unit is acquiring and elaborating the measured data Table 1 Front LED description All the communication connectors are present on the front panel On the rear side of the unit are placed t...

Page 12: ...2 Communication Interfaces CT BOX 300 WCTBOX300XAA 300A Current Transducer Digital Box with Local Display and Ethernet USB RS 232 Communication Interfaces CT BOX 400 WCTBOX400XAA 400A Current Transduc...

Page 13: ...ordering code for the additional mounting bracket is the following Product Code Ordering Code Description CT BOX MB WCTBOXMBXAAA CT BOX Mounting Brackets for 1U 19 cabinet installation Table 3 CT BOX...

Page 14: ...ese simple steps 1 4 1 Package Content The CT BOX bundle is composed of six different items Please check that all the listed elements are present upon receipt of the package Manuals FAT Report User s...

Page 15: ...hey are included in the package at the time of delivery only if included in the order 1 4 2 Connect the CT BOX Please connect the CT BOX central unit to the AC power line with the provided cable i e i...

Page 16: ...Once the device powers up the display and LEDs should turn on and light up 1 4 4 CT BOX Viewer Installation Install the CT BOX Viewer software included in the User s CD item or download the latest ve...

Page 17: ...t connection Both of them are described hereafter 1 4 5 1 Ethernet Communication Connect a standard Ethernet cable between an external PC and the CT BOX central unit Figure 8 Ethernet connection Follo...

Page 18: ...CT BOX User s Manual 16 Follow the instructions and communication setting presented in the section USB Interface hereafter in this document...

Page 19: ...1 Saved Configuration The CT BOX starts with the last saved configuration that was configured to the device The position of the DIP switch 4 of the rear panel needs to be set as shown hereafter HIGH...

Page 20: ...al temperature stabilized sections that allow obtaining almost negligible temperature dependence of the measurements Dependence of the measurements from external ambient temperature are kept the best...

Page 21: ...ut simple RS232 serial interface dg fixed baud rate at 115 200 bps there are some restrictions The CT BOX can be used only in data logger mode when communicating via the RS232 For further information...

Page 22: ...mmand for more information about the single command please refer to the specific command section There are two specific replies commonly used and indicate if the command has been correctly elaborated...

Page 23: ...acquisition with a slower sampling rate The current measurements can be read using the communication interface and or can be stored on the connected SD card Optionally it is possible also to read and...

Page 24: ...ted in binary format The binary representation improves the data rate transmission as it avoids the overhead due to the ASCII format conversion and reduces the amount of sent data Every acquisition at...

Page 25: ...larm The current is outside the limits 8 Alarm Direction If this bit is high then the current is over the limit if low then it is under the limit Table 5 Status code The third 32 bit number 4 bytes in...

Page 26: ...lds none one or two The number of additional temperature fields can be selected with the ACQT command Also in this case the values are separated by a space s and every acquisition is terminated with c...

Page 27: ...CT BOX User s Manual 25 The acquisitions in the Data logger mode have a variable character s length For additional information regarding the optional temperature fields please see the ACQT command...

Page 28: ...o select the mode of operation are the following MODE OSC r to select the Oscilloscope mode MODE DLOG r to select the Data logger mode The device replies with acknowledge ACK r n when the command is c...

Page 29: ...CT BOX User s Manual 27 Examples MODE example for Oscilloscope mode set MODE OSC r ACK r n MODE read example MODE r OSC r n...

Page 30: ...selected mode of operation and the relative sampling period The format of the returned measurement is always expressed in ASCII floating number with 7 decimals numbers in Ampere A with the r n termin...

Page 31: ...f the external sensor is not connected the value 9999 0 is returned The format of the returned temperatures is always expressed in ASCII floating number with one decimal number in Celsius C with the r...

Page 32: ...ual ACQ status is ACQ r The reply to the read command is in the following form acquisition_status r n where acquisition_status is ON when the device is acquiring the data and OFF when the acquisition...

Page 33: ...200073 r n ACQ OFF r ACK r n ACQ ON example in Oscilloscope mode with PRINT enabled afterwards note in this case the first acquisition 0x01 0x10 are not displayed because the PRINT command is enabled...

Page 34: ...e print_status is ON when the printing is enabled and OFF when the printing is disabled PRINT Command PRINT parameter r Parameter Command description Type of command Return value ON Enable printing on...

Page 35: ...time interval expressed in s in the interval 10 1 000 000 with incremental step of 10 When the TS command is correctly processed the CT BOX replies with an acknowledge ACK r n The command used to read...

Page 36: ...TS command is correctly processed the CT BOX replies with an acknowledge ACK r n The command used to read the actual FREQ setting is FREQ r The reply to the read command is in the following form samp...

Page 37: ...ure 000 the optional temperature readings are disabled 010 External temperature sensor readings enabled 100 DCCT head temperature readings enabled 110 External sensor and DCCT head temperature reading...

Page 38: ...allows to read the information about the CT BOX firmware version The reply to the VER r command is in following format firmware_release r n where firmware_release indicates the installed CT BOX firmw...

Page 39: ...led is useful to associate a user defined name the case of a larger installation The command CTBOX NAME r can be used to read the user defined description of the device The reply to this command is in...

Page 40: ...r can be used to read the model and serial number of the DCCT Head currently connected to the CT BOX Also this command is factory defined and so it is read only The reply to this command is in followi...

Page 41: ...cale the CT BOX readings by the factor of turns N The factory defined number of turns is 1 no turns applied to the primary conductor The command PTURNS N r sets the number of the turns N applied to th...

Page 42: ...CT BOX User s Manual 40 PTURNS example to set the number of turns to 3 PTURNS 3 r ACK r n PTURNS read PTURNS r 3 r n...

Page 43: ...nsation it is necessary to execute the command OFFSET ZERO r when the primary current is equal to 0 no current is flowing through the CT sensor When the command is correctly interpreted the unit repli...

Page 44: ...ounted Indicates that the SD is mounted See SAVE command for additional information 16 7 Reserved For internal or future use 17 MODE setting Indicates the status of the MODE setting 0 Oscilloscope 1 D...

Page 45: ...or future use 9 DCCT head error Indicates that the DCCT head is not connected or is not working properly 10 16 Reserved For internal or future use 17 Buffer overflow error A buffer overflow occurred T...

Page 46: ...register Read ASCII representation of the internal Error register value Table 20 ERR command Examples Error register read example for example the value 0x10001 indicates that there was an SD mount er...

Page 47: ...hed in the Status register It stays set also when the alarm condition is removed The command ALARM CLR r clears the Alarm condition and so also the Alarm flag bi in the Status register ALARM Command A...

Page 48: ...led ACQ ON setting When the acquired current is outside the configured range the alarm condition is set In this condition the D SUB Alarm line is driven high and the magnetic relay is switched so the...

Page 49: ...CT BOX User s Manual 47 Examples ALARM checking enabling example ALARM ON r ACK r n ALARM Upper Threshold limit set to 100A example ALARM ULIM 100 r ACK r n ALARM ULIM r 100 r n...

Page 50: ...ster and the Error condition bit is set in the Status register This error does not affect the acquisition To resume the saving the acquisition has to be stopped the fault has to be solved At this poin...

Page 51: ...LS lists all the files that are on the SD card SD RM removes the selected file from the SD card SD SIZE informs the user about the size of the selected file SD READ reads the content of the selected f...

Page 52: ...Command SD parameter1 parameter2 r Parameter 1 Parameter 2 Command description Type of command Return value MOUNT not present Mount SD card Set ACK UNMOUNT not present Unmount SD card Set ACK not pre...

Page 53: ...rsion In this mode the device does not start immediately the acquisition after the ACQ ON but it waits for a trigger pulse When the device receives a rising edge on the trigger input signal it starts...

Page 54: ...0x00 0x000002 0x41300000 r n r n The command used to exit from the triggered acquisition mode is TRG OFF r The command used to read the actual trigger setting is TRG r The reply to the read command i...

Page 55: ...n The new IP address takes effect after CT BOX reset The command used to read the IP address setting is IP r The reply to the read command is in the following form ip_address r n where ip_address is a...

Page 56: ...ommand description Type of command Return value Reads the actual subnet mask Read Subnet mask Subnet mask Sets new subnet mask Set ACK Table 27 MASK command 2 3 7 GATE Command The default gateway of E...

Page 57: ...end data to different port PORT Command PORT parameter r Parameter Command description Type of command Return value Reads current port number Read Port port Sets new port number Set ACK Table 29 PORT...

Page 58: ...econds This setting is used in the Data Logger mode The RTC time can be changed with the TIME time r command where the time stands for ASCII formatted string hours minutes seconds After the successful...

Page 59: ...used in the Data Logger mode The RTC can be changed with the DATE date r command where the date stands for ASCII formatted string day month year After the successful date change the CT BOX replies wi...

Page 60: ...scope mode acquisition is not allowed with the serial communication interface 3 1 Ethernet Interface The device is shipped with default IP address subnet mask and gateway and TCP IP communication port...

Page 61: ...gram Files x86 STMicroelectronics Software Virtual comport driver and go to your OS version directory Win 7 or Win 8 and then double click on dpinst_x86 exe for a 32 bits OS version dpinst_amd64 exe f...

Page 62: ...nstallation prepare the CT BOX for the firmware update following the subsequent steps Switch OFF the CT BOX unit using the main switch present on the front panel of the device Set the SWITCH 1 on the...

Page 63: ...uSe Demonstration Under Upgrade or Verify Action Figure 19 click on Choose and select the new firmware file dfu to download into the CT BOX Figure 19 DfuSe Upgrade setup Check the boxes Verify after d...

Page 64: ...se Switch ON the CT BOX Now the CT BOX is updated with the just installed firmware 3 3 Power Connector The input power connector is a standard IEC 60320 1 C14 The input voltage is extended so can be u...

Page 65: ...re Sensor 2 TSENS GND Ground reference for Temperature Sensor 3 Do Not Connect Internal Use 4 Trigger Out 5 V TTL Trigger Out signal 5 GND Ground reference 6 Relay NC Normally Closed Contact of Magnet...

Page 66: ...panel 3 4 1 External Temperature Sensor The CT BOX can read the temperature of the DCCT head with a sensor that is integrated into the 0 FLUCS current sensor Data are transmitted on the DE 9 to DE 9...

Page 67: ...ut range is rated at 10 V the output voltage is scaled depending on the DCCT primary measured current with a Full Scale measured current corresponding to a 10V output on this monitor The monitor is di...

Page 68: ...nt impedance higher than 500 k 3 7 SD Card Socket The SD Card slot on the rear side of the unit can host a Micro SD Card with the following characteristics Parameter Value Supported Class 4 6 10 and U...

Page 69: ...0 kHz Thermal Coefficient 1 ppm K Local Current Display 7 digits LED Indicators Power OK DCCT Head OK Status SD Card R W Acquisition running Digital Interfaces Ethernet 10 100 TCP IP USB 2 0 RS 232 An...

Page 70: ...depends over the averaging performed by the device this affecting the ENOB Effective Number Of Bits In the following graph the CT BOX noise characteristic and the equivalent ENOB are represented Figu...

Page 71: ...CT BOX User s Manual 69 5 Mechanical Dimensions The mechanical dimensions of the CT BOX unit including connectors are hereafter presented Figure 27 CT BOX mechanical dimensions...

Page 72: ...CT BOX User s Manual 70 Figure 28 CT BOX with Mounting Brackets...

Page 73: ...meter is not valid 1 2 VER Command is not allowed during the acquisition mode 2 1 MODE Parameter is not valid 2 2 MODE Command is not allowed during the acquisition mode 3 1 ACQ Parameter is not valid...

Page 74: ...during the acquisition mode 15 1 DATA Parameter is wrong 15 2 DATA Command is not allowed during the acquisition mode 16 1 ACQT Parameter is wrong 16 2 ACQT Command is not allowed during the acquisit...

Page 75: ...lowed during the acquisition mode 37 1 IP Parameter is wrong 37 2 IP Command is not allowed during the acquisition mode 38 1 GATE Parameter is wrong 38 2 GATE Command is not allowed during the acquisi...

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