PICO PT-104 Programmer's Manual

Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 Contents 1 Introduction ......................................................................................................................... 1 1 Overview ................................................................................................................................................. 1 2 Legal information ................................................................................................................................... 1 3 Trademarks ............................................................................................................................................ 2 2 Driver information ............................................................................................................... 3 3 API functions ...................................................................................................................... 4 1 UsbPt104CloseUnit ................................................................................................................................ 5 2 UsbPt104Enumerate .............................................................................................................................. 6 3 UsbPt104GetUnitInfo ............................................................................................................................. 7 4 UsbPt104GetValue ................................................................................................................................. 8 5 UsbPt104IpDetails ................................................................................................................................. 9 6 UsbPt104OpenUnit .............................................................................................................................. 10 7 UsbPt104OpenUnitViaIp ...................................................................................................................... 11 8 UsbPt104SetChannel ........................................................................................................................... 12 9 UsbPt104SetMains .............................................................................................................................. 13 4 Constants and enumerated types ................................................................................... 14 5 Ethernet protocol .............................................................................................................. 15 1 Enabling the Ethernet module ............................................................................................................. 15 2 Finding Ethernet PT-104s .................................................................................................................... 15 1 Commands ............................................................................................................................... 15 3 Unlocked unit response ....................................................................................................................... 16 4 Locked unit responses ......................................................................................................................... 16 5 To calculate a resistance ..................................................................................................................... 17 6 Technical reference .......................................................................................................... 18 Index ..................................................................................................................................... 23

1 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 1 Introduction 1.1 Overview The PT-104 is a four-channel, high-resolution data logger for use with PT100 and PT1000 type platinum resistance thermometer (PRT) sensors. As well as temperature, it can also be used to measure resistance and voltage. Additional information For instructions on connecting and using the device, and setting it up with the PicoLog software, please see the PT-104 Data Logger User's Guide available on www.picotech.com. 1.2 Legal information The material contained in this release is licensed, not sold. Pico Technology grants a license to the person who installs this software, subject to the conditions listed below. Access. The licensee agrees to allow access to this software only to persons who have been informed of these conditions and agree to abide by them. Usage. The software in this release is for use only with Pico products or with data collected using Pico products. Copyright. Pico Technology Limited claims the copyright of, and retains the rights to, all material (software, documents etc.) contained in this release. You may copy and distribute the entire release in its original state, but must not copy individual items within the release other than for backup purposes. Liability. Pico Technology and its agents shall not be liable for any loss, damage or injury, howsoever caused, related to the use of Pico Technology equipment or software, unless excluded by statute. Fitness for purpose. No two applications are the same: Pico Technology cannot guarantee that its equipment or software is suitable for a given application. It is your responsibility, therefore, to ensure that the product is suitable for your application. Mission-critical applications. This software is intended for use on a computer that may be running other software products. For this reason, one of the conditions of the license is that it excludes usage in mission- critical applications, for example life support systems. Viruses. This software was continuously monitored for viruses during production. However, you are responsible for virus-checking the software once it is installed. Support. If you are dissatisfied with the performance of this software, please contact our technical support staff, who will try to fix the problem within a reasonable time. If you are still dissatisfied, please return the product and software to your supplier within 14 days of purchase for a full refund. Upgrades. We provide upgrades, free of charge, from our web site at www.picotech.com. We reserve the right to charge for updates or replacements sent out on physical media.

usbpt104pg r8 1.3 Trademarks Pico Technology, and PicoLog are trademarks of Pico Technology Limited, registered in the United Kingdom and other countries. PicoLog and Pico Technology are registered in the U.S. Patent and Trademark Office. Windows is a registered trademark of Microsoft Corporation in the USA and other countries.

3 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 2 Driver information The USB PT-104 driver is available in 32-bit and 64-bit versions of the PicoSDK from www.picotech.com. Example code is available from repositories under the "picotech" organization in GitHub. The driver is supplied as a Windows DLL, usbpt104.dll, which can be used with many programming languages.

usbpt104pg r8 3 API functions These are the API functions provided by the driver: UsbPt104CloseUnit Close the port (do this each time you finish using the device!) UsbPt104Enumerate Get list of attached devices. UsbPt104GetUnitInfo Retrieve information about this PT-104. UsbPt104GetValue Get the most recent data reading from a channel. UsbPt104IpDetails Read or write IP settings. UsbPt104OpenUnit Open the device through its USB interface. UsbPt104OpenUnitViaIp Open the device through its Ethernet interface. UsbPt104SetChannel Specify the sensor type and filtering for a channel. UsbPt104SetMains Change the mains noise filtering setting to 60 Hz. The default is 50 Hz. The normal calling sequence for these functions is as follows: Load driver Open unit Set channels While you want to read data Get data End while Close unit Unload driver* * Happens automatically when application is terminated.

5 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 3.1 UsbPt104CloseUnit PICO_STATUS UsbPt104CloseUnit ( int16_t handle ) This function disconnects the driver from the device. Arguments: handle, identifies the device to close Returns: defined in PicoStatus.h

usbpt104pg r8 3.2 UsbPt104Enumerate PICO_STATUS UsbPt104Enumerate ( int8_t * details, uint32_t * length, COMMUNICATION_TYPE type ) This function returns a list of all the attached PT-104 devices of the specified port type. Arguments: details, a string buffer to receive a maximum of length characters. The string is a comma-separated list of attached devices of the selected type. The buffer must be long enough to accommodate the expected string. USB devices are listed in this format: USB:Serial Number Example: USB:CT264/118 Ethernet devices are listed in this format: IP:Serial Number[IP Address:port] Example: IP:CT264/118[192.168.1.253:6500] length, input: the length of the details buffer output: the length of the information string returned type, the communication type used by the PT-104. Can be any of the following enumerated types: CT_USB = 0x00000001 (lists only USB-connected devices) CT_ETHERNET = 0x00000002 (lists only Ethernet-connected devices) CT_ALL = 0xFFFFFFFF (lists all devices regardless of connection type) Returns: defined in PicoStatus.h

7 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 3.3 UsbPt104GetUnitInfo PICO_STATUS UsbPt104GetUnitInfo ( int16_t handle, int8_t * string, int16_t stringLength, int16_t * requiredSize, PICO_INFO info ) This function obtains information on a specified device. Arguments: handle, identifies the device whose information is required string, output: the information requested stringLength, input: the length of the string buffer requiredSize, output: the length of the information string requested. If this is longer than stringLength then only the first stringLength characters of the requested information are written to string. info, the type of information required. The following types are defined in PicoStatus.h: PICO_DRIVER_VERSION PICO_USB_VERSION PICO_HARDWARE_VERSION PICO_VARIANT_INFO PICO_BATCH_AND_SERIAL PICO_CAL_DATE PICO_KERNEL_DRIVER_VERSION PICO_MAC_ADDRESS Returns: defined in PicoStatus.h

usbpt104pg r8 3.4 UsbPt104GetValue PICO_STATUS UsbPt104GetValue ( int16_t handle, USBPT104_CHANNELS channel, int32_t * value, int16_t filtered ) Once you open the driver and define some channels, the driver begins to take continuous readings from the PT-104. When you call this function, it immediately sets data to the most recent reading for the specified channel. The scaling of measurements is as follows: Range Scaling Temperature value × 1/1000 °C Voltage (0 to 2.5 V) value × 10 nV Voltage (0 to 115 mV) value × 1 nV Resistance (0 to 375 W) value × 1 µW Resistance (0 to 10 kW) value × 1 mW Arguments: handle, identifies the device from which to get data channel, the number of the channel to read, from 1 to 4 in differential mode or 1 to 8 in single-ended mode value, output: the requested reading filtered, if set to TRUE, the driver returns a low-pass filtered value of the temperature. The time constant of the filter depends on the channel parameters as set by UsbPt104SetChannel, and on how many channels are active. Returns: defined in PicoStatus.h

9 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 3.5 UsbPt104IpDetails PICO_STATUS UsbPt104IpDetails ( int16_t handle, int16_t * enabled, int8_t * ipaddress, uint16_t * length, uint16_t * listeningPort, IP_DETAILS_TYPE type ) This function either reads or writes the IP details of a specified device. The type argument controls whether the operation is a read or a write. Arguments: handle, identifies the device that is the target of the operation enabled, input: 1 to enable the device, 0 to disable output: 1 if the device is enabled, 0 if disabled ipaddress, input or output: the IP address of the device Example: 192.168.1.253 length, input or output: the length of the IP address string listeningPort, input or output: the local IP port connected to the device type, the type of operation to be performed. Can be either of the following types: IDT_GET, to read information from the driver IDT_SET, to write information to the driver Returns: defined in PicoStatus.h

usbpt104pg r8 3.6 UsbPt104OpenUnit PICO_STATUS UsbPt104OpenUnit ( int16_t * handle, int8_t * serial ) This function obtains a handle for the PT-104 device with the given serial number. If you wish to use more than one PT-104, you must call the function once for each device. Arguments: handle, output: handle of the device that was opened. This value is used to identify the device in all further function calls. serial, input: serial number string of device, null-terminated Returns: defined in PicoStatus.h

11 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 3.7 UsbPt104OpenUnitViaIp PICO_STATUS UsbPt104OpenUnitViaIp ( int16_t * handle, int8_t * serial, int8_t * ipAddress ) This function obtains a handle for the Ethernet-connected PT-104 device, identified by either its IP address or its serial number. · Using IP address identification, a device anywhere on the internet or local network can be opened. · Using serial number identification, only a device on the local network can be opened. If you wish to use more than one PT-104, you must call the function once for each device. To control the device directly through the Ethernet port without using the usbpt104 DLL, see Ethernet protocol. Arguments: handle, output: handle of the device that was opened. This value is used to identify the device in all further function calls. serial, input: serial number of device as a null-terminated string, or a null pointer if ipAddress is used ipAddress, input: the IP address of the device as a null-terminated string, or a null pointer if serial is used Example: for IP address 192.168.1.253 and listening port 6500, use the string: 192.168.1.253:6500 Returns: defined in PicoStatus.h

usbpt104pg r8 3.8 UsbPt104SetChannel PICO_STATUS UsbPt104SetChannel ( int16_t handle, USBPT104_CHANNELS channel, USBPT104_DATA_TYPES type, int16_t noOfWires ) This function configures a single channel of the specified PT-104. It can be called any time after calling UsbPt104OpenUnit. The fewer channels selected, the more frequently they will be updated. Measurement takes about 720 ms per active channel. If a call to UsbPt104SetChannel has a type of single-ended, then the specified channel's 'sister' channel is also enabled. For example, enabling 3 also enables 7. Arguments: handle, identifies the device to be configured channel, which channel you want to set the details for. It should be between 1 and 4 if using single-ended inputs in voltage mode. type, the type of reading you require. Choose from the table below. noOfWires, how many wires the PT100 or PT1000 sensor has (2, 3 or 4) Returns: defined in PicoStatus.h USBPT104_DATA_TYPES Data type USBPT104_OFF 0 disable channel USBPT104_PT100 1 PT100 USBPT104_PT1000 2 PT1000 USBPT104_RESISTANCE_TO_375R 3 resistance 0 to 375 Ω USBPT104_RESISTANCE_TO_10K 4 resistance 0 to 10 kΩ USBPT104_DIFFERENTIAL_TO_115MV 5 differential voltage 0 to 115 mV USBPT104_DIFFERENTIAL_TO_2500MV 6 differential voltage 0 to 2.5 V USBPT104_SINGLE_ENDED_TO_115MV 7 single-ended voltage 0 to 115 mV USBPT104_SINGLE_ENDED_TO_2500MV 8 single-ended voltage 0 to 2.5 V

13 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 3.9 UsbPt104SetMains PICO_STATUS UsbPt104SetMains ( int16_t handle, uint16_t sixty_hertz ) This function is used to inform the driver of the local mains (line) frequency. This helps the driver to filter out electrical noise. Arguments: handle, identifies the device to be configured sixty_hertz, for 50 Hz set to 0; for 60 Hz set to 1 Returns: defined in PicoStatus.h

14 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 4 Constants and enumerated types #define USBPT104_MIN_WIRES 2 #define USBPT104_MAX_WIRES 4 typedef enum enUsbPt104Channels { USBPT104_CHANNEL_1 = 1, USBPT104_CHANNEL_2, USBPT104_CHANNEL_3, USBPT104_CHANNEL_4, USBPT104_CHANNEL_5, USBPT104_CHANNEL_6, USBPT104_CHANNEL_7, USBPT104_CHANNEL_8, USBPT104_MAX_CHANNELS = USBPT104_CHANNEL_8 } USBPT104_CHANNELS; typedef enum enUsbPt104DataType { USBPT104_OFF, USBPT104_PT100, USBPT104_PT1000, USBPT104_RESISTANCE_TO_375R, USBPT104_RESISTANCE_TO_10K, USBPT104_DIFFERENTIAL_TO_115MV, USBPT104_DIFFERENTIAL_TO_2500MV, USBPT104_SINGLE_ENDED_TO_115MV, USBPT104_SINGLE_ENDED_TO_2500MV, USBPT104_MAX_DATA_TYPES } USBPT104_DATA_TYPES; typedef enum enIpDetailsType { IDT_GET, IDT_SET, } IP_DETAILS_TYPE; typedef enum enCommunicationType { CT_USB = 0x00000001, CT_ETHERNET = 0x00000002, CT_ALL = 0xFFFFFFFF } COMMUNICATION_TYPE;

15 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 5 Ethernet protocol Using the protocol described below, the PT-104 can be controlled directly through the Ethernet port without using the usbpt104 DLL. 5.1 Enabling the Ethernet module By default the Ethernet module is disabled to save power. To enable it, plug the connector into a USB port and use the Ethernet settings application installed with PicoLog. Once an IP address and port are assigned, the module will be enabled. The unit may then be used by powering from USB or PoE. 5.2 Finding Ethernet PT-104s To discover all PT-104 data loggers on a network: · Send a UDP packet to port 23 from port 23 (telnet) to destination 255.255.255.255 with this character string: fff (three bytes of 0x66 - that is, 0x666666) · All PT-104s will reply from port 23 to port 23. The data will be the string: PT104 Mac:XXXXXX Lock:Y Port:ZZ where: XXXXXX is the 6-byte MAC address of the PT-104 replying Y is 0x00 for unlocked and 0x01 for locked ZZ is the port it will listen on (two bytes, MSB first). 5.2.1 Commands To lock a PT-104 to a machine, send a UDP packet containing the data string lock destined for the device's listening port and IP address. This is required before the PT-104 is usable. UDP packet data in the form Command + Data bytes:

usbpt104pg r8 Command Data bytes Function 0x30 0x00 for 50 Hz Any other byte for 60 Hz Change mains frequency rejection 0x31 One byte, bit 0 is LSB Bit 0: enable channel 1 Bit 1: enable channel 2 Bit 2: enable channel 3 Bit 3: enable channel 4 Bit 4: channel 1 gain Bit 5: channel 2 gain Bit 6: channel 3 gain Bit 7: channel 4 gain Start converting enable: 0 - off 1 - on gain: 0 - x1 1 - x21 (for 375 Ω range) 0x32 - Read EPROM 0x33 - Unlock 0x34 - Keep alive Unlock / timeout stops the transfer of any channel data. Use Unlock when the application no longer requires the unit so that it is unlocked for use with other machines. 5.3 Unlocked unit response The response from an unlocked unit is described in Finding Ethernet PT-104s. 5.4 Locked unit responses · Lock Success · Lock Success (already locked to this machine) · Unlocked · The string EEPROM= followed by a byte[128] array (see table below) · Converting · Mains Changed · Unknown Command · Alive · [hex] 00 XX XX XX XX 01 XX XX XX XX 02 XX XX XX XX 03 XX XX XX XX data from channel 1 where XX is a byte of the 4-byte measurement value, most-significant byte first. The 4-byte values are measurements 0, 1, 2 and 3. · [hex] 04 XX XX XX XX 05 XX XX XX XX 06 XX XX XX XX 07 XX XX XX XX data from channel 2 · [hex] 08 XX XX XX XX 09 XX XX XX XX 0a XX XX XX XX 0b XX XX XX XX data from channel 3 · [hex] 0c XX XX XX XX 0d XX XX XX XX 0e XX XX XX XX 0f XX XX XX XX data from channel 4 A unit that has been locked will reply Lock Success or, if currently locked by this machine, Lock Success (already locked to this machine). Converting is an acknowledgment of any convert request received. Once a setting has been made the unit will continue to convert and send back data. This means there will be incoming data approximately every 720 ms. To stop all converting, send a converting command with data 0x00 to turn off all channels.

17 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 After receiving the lock command via UDP, a 15 s timeout will start and a keep-alive packet must be sent in this time. The Alive response is the acknowledgment. Try to send a keep-alive packet every 10 seconds to allow time to retry if no acknowledgment is received. If any request is made from another machine while a unit is locked, the response will be PT104 Mac:XXXXXX Lock:Y Port:ZZ as explained in Finding Ethernet PT-104s. EEPROM FORMAT Index NumBytes Data 0 19 Reserved 19 10 Batch 29 8 Calibration Date 37 4 Ch1 Calibration (LSB first) 41 4 Ch2 Calibration (LSB first) 45 4 Ch3 Calibration (LSB first) 49 4 Ch4 Calibration (LSB first) 53 6 MAC Address 59 67 Reserved 126 2 Checksum 5.5 To calculate a resistance · Read the EEPROM to obtain the calibration information for the channels. · Take measurement 0, 1, 2 and 3 on a channel. · Note that measurements are stored MSB-first while calibration values are stored LSB-first. · Then: result = (channel calibration * (measurement 3 - measurement 2)) /(measurement 1 - measurement 0) · To convert to a resistance, divide result by 1 000 000.0. For other measurement types see the Protocol information in the Serial Port PT-104 User's Guide.

usbpt104pg r8 6 Technical reference Here is the resistance–temperature characteristic for a PT100 sensor: Temp (°C) Resistance (W) -50 80.306282 -49 80.703340 -48 81.100257 -47 81.497036 -46 81.893677 -45 82.290179 -44 82.686545 -43 83.082774 -42 83.478868 -41 83.874827 -40 84.270652 -39 84.666343 -38 85.061901 -37 85.457327 -36 85.852622 -35 86.247785 -34 86.642818 -33 87.037721 -32 87.432495 -31 87.827140 -30 88.221657 -29 88.616046 -28 89.010309 -27 89.404445 -26 89.798455 -25 90.192339 -24 90.586099 -23 90.979734 -22 91.373246 -21 91.766634 -20 92.159898 -19 92.553041 -18 92.946061 -17 93.338960 -16 93.731737 -15 94.124394 -14 94.516930 -13 94.909346 -12 95.301643 -11 95.693820 -10 96.085879 -9 96.477819 -8 96.869641 -7 97.261345 -6 97.652931 -5 98.044401 -4 98.435753 -3 98.826989 -2 99.218109 -1 99.609112 0 100.000000

19 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 1 100.390772 2 100.781429 3 101.171970 4 101.562396 5 101.952706 6 102.342901 7 102.732980 8 103.122944 9 103.512792 10 103.902525 11 104.292142 12 104.681644 13 105.071030 14 105.460301 15 105.849456 16 106.238496 17 106.627420 18 107.016229 19 107.404922 20 107.793500 21 108.181962 22 108.570309 23 108.958540 24 109.346656 25 109.734656 26 110.122541 27 110.510310 28 110.897964 29 111.285502 30 111.672925 31 112.060232 32 112.447424 33 112.834500 34 113.221461 35 113.608306 36 113.995036 37 114.381650 38 114.768149 39 115.154532 40 115.540800 41 115.926952 42 116.312989 43 116.698910 44 117.084716 45 117.470406 46 117.855981 47 118.241440 48 118.626784 49 119.012012 50 119.397125 51 119.782122 52 120.167004 53 120.551770 54 120.936421 55 121.320956 56 121.705376 57 122.089680

usbpt104pg r8 58 122.473869 59 122.857942 60 123.241900 61 123.625742 62 124.009469 63 124.393080 64 124.776576 65 125.159956 66 125.543221 67 125.926370 68 126.309404 69 126.692322 70 127.075125 71 127.457812 72 127.840384 73 128.222840 74 128.605181 75 128.987406 76 129.369516 77 129.751510 78 130.133389 79 130.515152 80 130.896800 81 131.278332 82 131.659749 83 132.041050 84 132.422236 85 132.803306 86 133.184261 87 133.565100 88 133.945824 89 134.326432 90 134.706925 91 135.087302 92 135.467564 93 135.847710 94 136.227741 95 136.607656 96 136.987456 97 137.367140 98 137.746709 99 138.126162 100 138.505500 101 138.884722 102 139.263829 103 139.642820 104 140.021696 105 140.400456 106 140.779101 107 141.157630 108 141.536044 109 141.914342 110 142.292525 111 142.670592 112 143.048544 113 143.426380 114 143.804101

21 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 115 144.181706 116 144.559196 117 144.936570 118 145.313829 119 145.690972 120 146.068000 121 146.444912 122 146.821709 123 147.198390 124 147.574956 125 147.951406 126 148.327741 127 148.703960 128 149.080064 129 149.456052 130 149.831925 131 150.207682 132 150.583324 133 150.958850 134 151.334261 135 151.709556 136 152.084736 137 152.459800 138 152.834749 139 153.209582 140 153.584300 141 153.958902 142 154.333389 143 154.707760 144 155.082016 145 155.456156 146 155.830181 147 156.204090 148 156.577884 149 156.951562 150 157.325125 151 157.698572 152 158.071904 153 158.445120 154 158.818221 155 159.191206 156 159.564076 157 159.936830 158 160.309469 159 160.681992 160 161.054400 161 161.426692 162 161.798869 163 162.170930 164 162.542876 165 162.914706 166 163.286421 167 163.658020 168 164.029504 169 164.400872 170 164.772125 171 165.143262

usbpt104pg r8 172 165.514284 173 165.885190 174 166.255981 175 166.626656 176 166.997216 177 167.367660 178 167.737989 179 168.108202 180 168.478300 181 168.848282 182 169.218149 183 169.587900 184 169.957536 185 170.327056 186 170.696461 187 171.065750 188 171.434924 189 171.803982 190 172.172925 191 172.541752 192 172.910464 193 173.279060 194 173.647541 195 174.015906 196 174.384156 197 174.752290 198 175.120309 199 175.488212 200 175.856000

23 Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 Index B Batch number 7 C Calibration date 7, 16 Channel setup 12 Closing a unit 5 COMMUNICATION_TYPE type 14 D Driver version 7 E Ethernet port 11 Ethernet PT-104s commands 15 enabling 15 finding 15 introduction 15 locked unit response 16 resistance 17 unlocked unit response 16 H Handle, obtaining 10 Hardware version 7 I IP address 11 IP details 9 IP_DETAILS_TYPE type 14 K Kernel driver version 7 L Legal information 1 M Mains frequency 13 O Opening a unit 10 S Serial number 7 T Trademarks 2 U USB version 7 USBPT104_CHANNELS type 14 USBPT104_DATA_TYPES type 14 USBPT104_MAX_WIRES constant 14 USBPT104_MIN_WIRES constant 14 UsbPt104CloseUnit 5 UsbPt104Enumerate 6 UsbPt104GetUnitInfo 7 UsbPt104GetValue 8 UsbPt104IpDetails 9 UsbPt104OpenUnit 10 UsbPt104OpenUnitViaIp 11 UsbPt104SetChannel 12 UsbPt104SetMains 13 V Variant information 7

St. Neots Cambridgeshire PE19 8YP United Kingdom Copyright © 2010–2017 Pico Technology Ltd. All rights reserved. usbpt104pg r8 2017-09-21 Pico Technology 320 N Glenwood Blvd Tyler Texas 75702 United States Pico Technology Room 2252, 22/F, Centro 568 Hengfeng Road Zhabei District Shanghai 200070 PR China [email protected] [email protected] [email protected] Asia-Pacific head office: Tel: +44 (0) 1480 396 395 Fax: +44 (0) 1480 396 296 USA headquarters UK headquarters Tel: +1 800 591 2796 Fax: +1 620 272 0981 Tel: +86 21 2226-5152 www.picotech.com