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Related Manuals for abc ABC-MEMS
Summary of Contents for abc ABC-MEMS
- Page 1 ABC-MEMS User’s Manual October 4 2017...
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Page 2: Table Of Contents
INTRODUCTION _____________________________________________ 4 APPLICATIONS ______________________________________________ 4 WARNINGS _________________________________________________ 4 GETTING STARTED __________________________________________ 5 Software Installation ____________________________________________________________ 5 Hardware Installation ___________________________________________________________ 5 Initial Test and Configuration ____________________________________________________ 5 INSTRUMENT FUNCTIONS AND DESCRIPTION ___________________ 6 PRINCIPLE OF OPERATION ____________________________________ 7 Power Consumption ____________________________________________________________ 7 Battery Charging _______________________________________________________________ 7 Modes of Operation _____________________________________________________________ 8 LED Indicators ________________________________________________________________ 8... - Page 3 INSTRUMENT_MANAGER APPLICATION ________________________ 18 Starting the Application ________________________________________________________ 22 Main Functions _______________________________________________________________ 23 Setup Tab ____________________________________________________________________ 23 8.3.1 Time and Date Field ________________________________________________________ 23 8.3.2 Temperature Field __________________________________________________________ 23 8.3.3 Instrument Info Field ________________________________________________________ 23 8.3.4 Recording Field ____________________________________________________________ 24 8.3.5 Settings Field ______________________________________________________________ 26 8.3.6...
- Page 4 10.5 Cleaning _____________________________________________________________________ 40 10.6 Software and Firmware Upgrades ________________________________________________ 40 TROUBLESHOOTING_______________________________________ 41 11.1 USB Power Limitation _________________________________________________________ 41 11.2 USB Driver Installation _________________________________________________________ 41 11.3 Connection Problems __________________________________________________________ 42 User’s Manual...
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Page 5: Introduction
RMS vibration/velocity levels for months. Its very small size allows it to be attached to, or embedded within, the monitored equipment. The ABC-Mems model is an evolution of the 1e model. It has the following new features: •... -
Page 6: Getting Started
If it fails to find the instrument it indicates No Device Found. If this is the case see section Troubleshooting 3. Otherwise the application switches-on the ABC-MEMS and starts communicating with it. User’s Manual... -
Page 7: Instrument Functions And Description
Instrument Functions and Description The instrument connects to a PC on a USB port. The Instrument_Manager application is used to set its operating parameters and download recorded data. Figure 1 ABC-Mems 1. Charge LED 2. Operation LED 3. USB Connector 4. -
Page 8: Principle Of Operation
Power Consumption The ABC-Mems is always on. However, when not in operation it only measures time, which only takes a tiny operating current. In that Idle state it can stay on for up to 6 months. When the meter is actively measuring, its power consumption is mostly affected by two factors: •... -
Page 9: Modes Of Operation
Note: When connected to a PC, battery charging stops while the PC is in standby. Note: It is OK to leave the instrument connected to a PC or USB charger all the time. The smart charger inside the instrument will stop charging as soon as the battery reaches full-charge. Modes of Operation The meter has four modes of operation: Mode... -
Page 10: Operation Led
Acceleration Sensor and Signal Processing 6.5.1 Measurement The 3-axis MEMS accelerometer inside the ABC-Mems accurately measures static (DC) and dynamic (AC) acceleration signals with an adjustable sampling rate of up to 4 kHz. Velocities are calculated in real-time from the acceleration sensor. -
Page 11: Upper Frequency Limit
Figure 2 Signal Processing Figure 2 shows the signal processing flow for one axis of the accelerometer. The raw acceleration signal is sampled at an adjustable rate. The sampling rate can go up to 4 kHz. The signal is then optionally high-pass filtered to remove the DC and low-frequency components. This is usually required to capture RMS vibration levels. -
Page 12: Low-Frequency Limit
Figure 3 X and Y axes Figure 4 shows the response of the accelerometer structure and its acquisition chain, along the Z axis, at 4 kHz sampling rate. Figure 4 Z axis 6.5.3 Low-Frequency Limit The low-frequency can optionally be limited by the digital high-pass filter. The cutoff frequency is adjustable, and can be adjusted to extremely low frequencies thanks to the filter’s exceptionally high resolution. -
Page 13: Noise
Figure 5 High-Pass Filter 6.5.4 Noise 6.5.4.1 Acceleration Noise Figure 6 shows the RMS noise along the three axes, as a function of sampling frequency. Figure 6 Figure 7 shows the acceleration noise spectrum when the accelerometer is sampling at 4 kHz. User’s Manual... -
Page 14: Sensor Dynamic Range
Figure 7 6.5.4.2 Velocity Noise Figure 8 shows the RMS velocity noise as a function of the cutoff frequency of the high-pass filter. The velocity noise is not significantly influenced by sampling frequency. Figure 8 6.5.5 Sensor Dynamic Range The sensor’s dynamic range extends from -8 g to +8 g. The precise dynamic range is dependent upon the calibration and varies slightly from an individual instrument to the next. -
Page 15: Calibration
Calibration The calibration uses the earth’s gravity as a 1g reference signal. The calibration procedure is completely automated and can be performed at any time. It requires the user to set the instrument in successive stable positions with its X, Y and Z axes aligned vertically while the instrument takes the reference measurements. -
Page 16: Manual Recording
Manual Recording A manual recording is started by pressing the Record button in the Setup tab of the Instrument_Manager application. Every time a recording is started, a new record is created in memory and filled until the recording is stopped. That record is time-stamped, so the signals can be displayed with respect to absolute date/time. -
Page 17: Wifi™ Connectivity
WiFi™ Connectivity The ABC Mems supports a mode of operation where it periodically connects to a server (a Windows PC running the Instrument_Listener application) through WiFi™. This feature is designed to let the instrument record autonomously, periodically report the levels or signals recorded since the last connection, and optionally send emails with RMS-level or low-battery alerts. -
Page 18: Wifi™ Reporting
WiFi™ Reporting Note: When using the instrument with WiFi™ connectivity, do not start a recording manually, or via the timer. The instrument will be completely controlled by the server, including starting the recording, erasing memory if required, and resetting the time. When using the WiFi™... -
Page 19: Instrument_Manager Application
Send an alert email. • The battery is close to being depleted. Instrument_Manager Application Figure 9 Setup Tab 1. Real-Time Signals 2. Auto-Range Button 3. Sampling Frequency Indicator 4. Memory Fill Indicator 5. Timer Button 6. AutoRec Button 7. Record Button 8. - Page 20 18. Display Length Figure 10 Record Tab 1. Absolute/Relative Time Scale Button 2. Z-Axis Recorded Data 3. Pan and Zoom Buttons 4. Y-Axis Recorded Data 5. X-axis Recorded Data 6. Scale Buttons 7. Record Number Selector 8. Acceleration/Inclination Display Mode 9.
- Page 21 Figure 11 Spectrum Tab 1. Cursor, Zoom and Pan controls 2. Cursor values display 3. Scale buttons 4. Spectrum 5. Cursor 6. Auto-scale button 7. Spectral controls 8. Spectrum reset button User’s Manual...
- Page 22 Figure 12 Static Tab 1. Static axis indicator 2. Static digital display 3. Inclinometer graphic display 4. Inclinometer angle displays User’s Manual...
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Page 23: Starting The Application
All the controls and indicators related to the instrument are grayed out. To control a ABC Mems using the Instrument_Manager, proceed as follows: 1. Connect the instrument to an available USB connector on the PC. -
Page 24: Main Functions
If it fails to find the instrument it indicates No Device Found. If this is the case see section Troubleshooting 5. Otherwise the application immediately starts communicating with the ABC Mems. Main Functions The application has five main tabs: •... -
Page 25: Recording Field
To set, modify or delete the User-ID, simply place the cursor in the User-ID box and write a new identifier or clear the text. The new identifier is written to the instrument’s memory as soon as return or enter is pressed, or if the mouse is left-clicked outside of the box. The User-ID is written to non-volatile memory, so it is retained even in the event of a reset or battery failure. - Page 26 • The total memory time, in Days-Hours-Minutes-Seconds. The total memory time is displayed at the right extremity of the scale. It is calculated as a function of the instrument settings, such as log interval, statistics recorded…etc. Therefore it will change dynamically as the settings are modified, to reflect the new overall memory time.
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Page 27: Settings Field
4. Date setting field – Click a date to set 5. Time setting field – Use the field to set a new time 6. Window close button - Closes the window without changing the date/time setting 8.3.5 Settings Field The settings field contains the Settings and Calibration buttons. 8.3.5.1 Instrument Settings Panel The instrument settings panel opens when the user presses the Settings button. - Page 28 8.3.5.1.1 Sampling Frequency The sampling frequency can be adjusted up to 4 kHz. The power consumption while recording is roughly proportional to the sampling frequency. The Battery scale in the Setup panel indicates how long the instrument can record for as a function of sampling frequency. When recording raw signals the amount of memory consumed is proportional to the sampling frequency.
- Page 29 The log interval is only relevant when recording statistics. When recording raw signals the time between two successive samples is simply the sampling period. The log interval can be adjusted from 125 ms to 2 H in increments of 125 ms. When recording statistics the amount of memory consumed is inversely proportional to the log interval.
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Page 30: Battery Field
8.3.6 Battery Field This battery condition field indicates the remaining battery capacity. The indicator is surrounded by a yellow indicator that lights-up when the battery is charging. The battery condition indicator is scaled to indicate the approximate number of days of recording time remaining in the battery. -
Page 31: File Save
The time scale can be displayed in absolute (date/time) or relative (fractional seconds) format. The absolute format exposes the time-stamp that was written in memory with the record. Relative time is more useful when examining raw signals. When viewing acceleration data, the scale can be chosen as �� or ��/�� , in linear or dB scale for RMS When viewing velocity data the scale is ��/��, in linear or dB scale for RMS values. -
Page 32: Exporting Data
8.4.4 Exporting Data The data of the record being viewed can be exported for further display or processing. Depending on the type of record two formats can be chosen from: • If the record contains raw signals, the data can be exported to either .wav or tab-delimited text format. -
Page 33: Spectrum Tab
8.4.5.3 X-Y-Scale Direct Modification Another way to zoom a graph is to directly change its scale. To do that, simply click on the value for left- most or right-most marker of the X-scale, and select its value. Type a new value to replace the old one. The scale is adjusted so that that new value is used at the beginning or end of the scale. -
Page 34: Avg Mode
8.5.4 Avg Mode The Averaging Mode can be chosen from several choices: • RMS Averaging RMS averaging reduces signal fluctuations but not the noise floor. The noise floor is not reduced because RMS averaging averages the power of the signal. RMS Averaging is the most common type. -
Page 35: Connection Status
8.7.1 Connection Status 8.7.1.1 Levels of Connection When trying to connect, either at the preset interval, or for an email alarm, the instrument will do it in two stages: • The instrument first tries to connect to a WiFi™ router or access-point in its vicinity. •... -
Page 36: Wifi Settings
8.7.2 WiFi Settings The WiFi™ settings panel appears when the Set WiFi button is pressed. The WiFi™ settings are used to configure the Router(s) or Access Point(s) to connect to, the Server’s IP address or domain name, and the periodic connection schedule. Note: The Router and Access Point connection parameters must be set in order to send emails, even if no WiFi™... -
Page 37: Manual Connection
Note: By clicking on the little grey block at the left of the pass-phrase field, several input methods can be selected: • Password (P) is used to conceal the password being entered • Hex (H) is normally used in conjunction with WEP security •... -
Page 38: Email Setup
the server. Alternately the instrument’s server setup can use the WAN IP address of the router that the server is connected to. That is a less optimal solution because that WAN IP address is often subject to change by the internet provider, and when it changes the instrument won’t be able to connect to the server anymore. -
Page 39: Wifi™ Battery Drain
• Password The account password (leave blank for an “open” (no security) account). For gmail, this is the password to gain access to the account. • The encryption setting. This is the only secure mode supported. Uncheck for an “open” (no encryption) account. For gmail this should be set. In addition to these settings, the email alarms settings let you set: •... -
Page 40: File Storage
If the instrument is not currently recording, it then erases the instrument’s memory, adjusts the time, and starts recording. If the instrument is recording it closes as is and lets the recording continue. File Storage The .wlg files that are created by the ABC_Server are stored by default in C:\Users\username\Documents\ABC_Instruments\All_Instruments\Records\ABC-Mems, User’s Manual... -
Page 41: Maintenance
In the context of a particular user’s account, this folder is normally designated: Libraries\Documents\My Documents\ABC_Instruments\All_Instruments\Records\ABC-Mems These .wlg files can be opened for viewing by the Instrument_Manager application. 10 Maintenance 10.1 Battery Care The following factors affect battery life: •... -
Page 42: Troubleshooting
8. Verify that an item named DDCI Platform or ABC-Mems has been created in the list of devices. 9. If an unknown item appears, or an item named DDCI Platform or ABC-Mems is found but has an exclamation mark (indicating a problem) beside it, disconnect the device and try re-installing the driver (see step 10). -
Page 43: Connection Problems
10. To re-install the driver disconnect the instrument from the PC. Then Go into Start\All Programs\Convergence_Instruments\Instrument_Manager\Driver, DDCI_Driver_Install.exe. This re-installs the USB driver. 11.3 Connection Problems Failure to communicate with the PC can also be caused by poor USB cable contacts. Make sure the USB connector is fully inserted into the socket of the meter.