Related Manuals for Measurement Computing LGR-5320 Series
Summary of Contents for Measurement Computing LGR-5320 Series
- Page 1 LGR-5320 Series Stand-Alone, High-Speed, Analog and Digital I/O Data Loggers User's Guide Document Revision 2 October 2013 © Copyright 2013...
- Page 2 Management committed to your satisfaction! Thank you for choosing a Measurement Computing product – and congratulations! You own the finest, and you can now enjoy the protection of the most comprehensive warranties and unmatched phone tech support. It’s the embodiment of our mission: To provide data acquisition hardware and software that will save time and save money.
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Page 3: Table Of Contents
Where to find more information ......................... 5 Chapter 1 Introducing the LGR-5320 Series ......................6 Functional block diagram ........................... 7 Chapter 2 Installing a LGR-5320 Series Device ....................8 What comes with your shipment? ........................8 Hardware ..................................8 Software .................................... 8 Optional components ................................ 8 Documentation .................................. - Page 4 LGR-5320 Series User's Guide Chassis ground ..............................36 USB specifications ............................36 Environmental ..............................37 Mechanical ............................... 37 Screw terminal connector type ......................... 37 LGR-5325 screw terminal pinout.............................38 LGR-5327/5329 screw terminal pinout ..........................40 Declaration of Conformity ........................42...
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Page 5: Preface
Preface About this User's Guide What you will learn from this user's guide This user's guide describes the Measurement Computing LGR-5320 Series data acquisition and data logging devices and lists device specifications. Conventions in this user's guide For more information Text presented in a box signifies additional information and helpful hints related to the subject matter you are reading. -
Page 6: Introducing The Lgr-5320 Series
LGR-5320 Series devices have a single digital alarm output that is implemented as a single Form C relay. You can configure the relay to energize when the trigger condition is met and data is being recorded. -
Page 7: Functional Block Diagram
LGR-5320 Series User's Guide Introducing the LGR-5320 Series Functional block diagram LGR-5320 Series functions are illustrated in Figure 1. Connector FLASH Barrel Screw Connector Terminal Coin battery Microcontroller Connector Power Supplies Ext. Bus GPIO Config Multiplexer Gain & (16:1) Level shift... -
Page 8: Installing A Lgr-5320 Series Device
LGR-5320 Series device – LGR-5325, LGR-5327, or LGR-5329 USB cable (2-meter length) SD card 9 VDC, 1 A external power supply for use when LGR-5320 Series is not powered through the screw terminals Software DAQLog CD Optional components ACC-202 Din-rail kit Accessory for mounting a LGR-5320 Series device to a standard DIN rail. -
Page 9: Installing The Software
Refer to the DAQLog Quick Start for instructions on installing and using the DAQLog software. Installing the device When you install a LGR-5320 Series device, you can set it up to operate in one of the following modes: USB mode—The device is connected to a USB port on your host computer, and controlled by USB command. -
Page 10: Setting Up A Device In Usb Mode
Providing power to a LGR-5320 Series device before connecting its USB cable to the computer allows the device to inform the host computer (when the USB cable is connected) that the device requires minimal power from the USB port. - Page 11 LGR-5320 Series User's Guide Installing a LGR-5320 Series Device Figure 3 shows the location of the battery compartment on the board. Figure 3. Location of battery compartment Lift the clip and insert the new battery in the battery compartment. Make sure the positive side of the battery (+) is facing up and away from the circuit board.
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Page 12: Chapter 3 Functional Details
Figure 4. LGR-5320 Series external components Function buttons and LEDs (top of case) Each function button on the top of a LGR-5320 Series device case is explained below. All buttons and LEDs are disabled when a LGR-5320 Series device is connected to a USB port. - Page 13 Press any button on the top of the case to acknowledge the error and stop the LEDs from flashing. Figure 5. LGR-5320 Series error code LEDs For example, if you attempt to log without an SD card inserted in a LGR-5320 Series device, the CHOH LEDs both blink, representing binary code 0001.
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Page 14: Screw Terminals And Associated Leds
6 Counter input 2 and 3 terminals, LEDs, and configuration LEDs switches* * Configuration switches only apply to quadrature counters and are only installed on the LGR-5327 and LGR-5329. Figure 6. LGR-5320 Series screw terminals and LEDs Figure 7. Screw terminal LED on... -
Page 15: Signal Connections
Figure 9 assumes a board orientation with the USB connector on the right. Signal connections Analog input LGR-5320 Series devices have a 16-bit, multiplexed A/D that supports up to 16 single-ended or up to eight differential analog inputs. For the LGR-5325, the maximum throughput sample rate is 100 kS/s. -
Page 16: Trigger Input
CH0H /CH0L through CH3H /CH3L CH4H /CH4L through CH7H /CH7L You can configure all LGR-5320 Series analog input channels for voltage input ranges of ±10 V, ±5 V, or ±1 V. The LGR-5327 and LGR-5329 also support a ±30 V voltage input range. - Page 17 LGR-5320 Series User's Guide Functional Details If the LGR-5320 Series device is not ready due to one of the following reasons, the trigger is ignored: Incomplete configuration The device is finishing the previously triggered acquisition LGR-5320 Series devices do not indicate when a trigger is ignored.
- Page 18 LGR-5320 Series User's Guide Functional Details Trigger Invalid trigger detector Trigger logic Analog input Trigger (all) signals No trigger detector Valid trigger Trigger (any) Trigger Valid trigger detector Re-arm command from control circuits Figure 11. Multichannel trigger detection The logical relationship among three elements—polarity, duration, and initialization—determine if a trigger is valid in a multichannel environment.
- Page 19 LGR-5320 Series User's Guide Functional Details The first step in both multichannel and analog triggering is to examine the input signals. To determine trigger validity, the FPGA can examine each input signal in one of eight ways. Refer to the following table.
- Page 20 If the trigger is not latched, the channel may not stay valid. A LGR-5320 Series device does not trigger the acquisition until the channel becomes valid again, and all channels simultaneously reach their thresholds.
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Page 21: Digital I/O
Digital I/O You can connect up to 16 digital inputs to a LGR-5320 Series device. Each digital input is electrically isolated from the host computer and from the LGR-5320 Series analog and counter circuits. You can configure these inputs to detect events based on change of state or pattern recognition. These are the same bits used for a digital pattern trigger (refer to the Digital-pattern trigger section above) The digital inputs have a wide input voltage range of 0 V to 30 V. -
Page 22: Counter Input
Each clock pulse (start-of-scan signal) initiates a scan of all channels specified. Each time a LGR-5320 Series devices receives a start-of-scan signal, the counter values are latched and are available to the device. The values returned during scan period 1 are always zero. The values returned during scan period 2 reflect what happened during scan period 1. - Page 23 In counter mode, phase A is the primary counter input. You can use phase B to set the count direction in up/down counting. Use the Index input to gate, latch, or decrement the counter. LGR-5320 Series devices read counter inputs synchronously as part of the scan list, and support the following options in counter mode:...
- Page 24 10X, 100X or 1000X periods, 16-bit or 32-bit values. Four resolutions are available—to 20 ns, 200 ns, 2 µs, or 20 µs. All period measurement mode options are software-selectable. LGR-5320 Series devices use the 50 MHz system clock as the timing source, and measure periods from sub-microsecond to many seconds.
- Page 25 LGR-5320 Series User's Guide Functional Details Inverter Bypass Debounce Bypass Trigger Before Stable Screw terminals Counters Buffer Inverter Trigger After Stable Figure 20. Debounce block diagram Edge selection is available with or without debounce. In this case, the debounce time setting is ignored and the input signal goes straight from the inverter or inverter bypass to the counter module.
- Page 26 LGR-5320 Series User's Guide Functional Details —In the trigger before stable mode, the output of the debounce module Trigger before stable mode immediately changes state, but does not change again until a period of stability has passed. For this reason, you can use this mode to detect glitches.
- Page 27 LGR-5320 Series User's Guide Functional Details subsequent glitches within the group if the debounce time is set accordingly. Set the debounce time to encompass one entire group of glitches, as shown in Figure 24. Figure 24. Optimal debounce time for trigger before stable mode Trigger after stable mode behaves more like a traditional debounce function: rejecting glitches and only passing state transitions after a required period of stability.
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Page 28: Mechanical Drawings
LGR-5320 Series User's Guide Functional Details Mechanical drawings Figure 26. Circuit board dimensions Figure 27. Housing dimensions... -
Page 29: Chapter 4 Specifications
Chapter 4 Specifications All specifications are subject to change without notice. Typical for 25 °C unless otherwise specified. Specifications in italic text are guaranteed by design. Analog input Table 1. Analog input specifications Parameter Condition Specification A/D converter 16-bit successive approximation type Input ranges Software selectable per channel LGR-5327/5329: ±30 V, ±10 V, ±5 V, ±1 V... -
Page 30: Analog Input Calibration
LGR-5320 Series User's Guide Specifications When connecting differential inputs to floating voltage sources in the ±10 V, ±5 V, ±1 V ranges, the Note 3: user must provide a DC return path from the low channel (CHxL) connector of each differential input to ground. -
Page 31: Input Sequencer
LGR-5320 Series User's Guide Specifications Input sequencer Table 4. Input sequencer specifications Parameter Specifications Pacer clock sources: two Internal LGR-5325: 10 µs to 85.9 sec in 20 ns steps LGR-5327/5329: 5 µs to 85.9 sec in 20 ns steps External (PACER) ... -
Page 32: External Analog Trigger
LGR-5320 Series User's Guide Specifications External analog trigger Table 6. External trigger specifications Parameter Conditions Specification External analog trigger source ATRIG input (pin 78) Analog trigger input ranges LGR-5325: ±10 V LGR-5327/5329: ±30 V, ±10 V, software-selectable Absolute maximum input voltage ATRIG_IN to AGND LGR-5325: ±25 V V max (power on and... -
Page 33: Digital Output
LGR-5320 Series User's Guide Specifications Digital output Table 8. Digital output specifications Parameter Specification Number of outputs Type Mechanical relay, NEC ED2/EF2 series Relay configuration 1 Form C 0.075 Ω Relay contact resistance Relay contact operate time 3 ms (excluding bounce) -
Page 34: Counters
LGR-5320 Series User's Guide Specifications Counters Table 10. Counter specifications Parameter Condition Specification Counter type LGR-5325: Conventional LGR-5327/5329: Conventional and Quadrature (x1, x2, x4) Number of channels Inputs LGR-5325: Counter, Up/Down, Gate LGR-5327/5329: Phase A+/A–, Phase B+/B–, Index +/–... -
Page 35: Device Configuration
LGR-5320 Series User's Guide Specifications Device configuration Table 11. Configuration Parameter Specification Local Host PC over USB Remote Through configuration file on SD card Configuration file format Binary Controls/indicators Table 12. Controls/indicators Parameter Specification LOAD button Loads a configuration from the SD card/enters USB bootloader (hold while applying... -
Page 36: Power
The EGND pin is isolated from the measurement and I/O circuits. Only use the EGND pin to connect a LGR-5320 Series device to a local chassis ground connection. Do not use the EGND pin as a return path for any of the analog or digital I/O. -
Page 37: Environmental
LGR-5320 Series User's Guide Specifications Environmental Table 17. Environmental specifications Parameter Specification Operating temperature range 0 to 55 °C Storage temperature range –40 to 85 °C Humidity 0 to 90% non-condensing Mechanical Table 18. Mechanical specifications Parameter Specification Dimensions 9.5" L x 5.0" W x 1.75" H Weight 505.85 g (1.12 lbs) -
Page 38: Lgr-5325 Screw Terminal Pinout
LGR-5320 Series User's Guide Specifications LGR-5325 screw terminal pinout Table 20. LGR-5325 8-channel differential mode pinout Signal name Pin description Signal name Pin description CH0H Channel 0 HI AGND Analog ground AGND Analog ground CH7L Channel 7 LO CH0L Channel 0 LO... - Page 39 LGR-5320 Series User's Guide Specifications Table 21. LGR-5325 16-channel single-ended mode pinout Signal name Pin description Signal name Pin description Channel 0 AGND Analog ground AGND Analog ground CH15 Channel 15 Channel 8 AGND Analog ground AGND Analog ground Channel 7...
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Page 40: Lgr-5327/5329 Screw Terminal Pinout
LGR-5320 Series User's Guide Specifications LGR-5327/5329 screw terminal pinout Table 22. LGR-5327/5329 8-channel differential mode pinout Signal name Pin description Signal name Pin description CH0H Channel 0 HI AGND Analog ground AGND Analog ground CH7L Channel 7 LO CH0L Channel 0 LO... - Page 41 LGR-5320 Series User's Guide Specifications Table 23. LGR-5327/5329 16-channel single-ended mode pin out Signal name Pin description Signal name Pin description Channel 0 AGND Analog ground AGND Analog ground CH15 Channel 15 Channel 8 AGND Analog ground AGND Analog ground...
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Page 42: Declaration Of Conformity
Category: Electrical equipment for measurement, control and laboratory use. Measurement Computing Corporation declares under sole responsibility that the products LGR-5325, LGR-5327, LGR-5329 to which this declaration relates is in conformity with the relevant provisions of the following standards or other documents: EC EMC Directive 2004/108/EC: General Requirements, EN 61326-1:2006 (IEC 61326-1:2005). - Page 43 Measurement Computing Corporation 10 Commerce Way Suite 1008 Norton, Massachusetts 02766 (508) 946-5100 Fax: (508) 946-9500 E-mail: info@mccdaq.com www.mccdaq.com...
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