Manual MJK 800 / 900 Expert Level Loggers Log 1 GB Manual Expert Log 800-900.
Manual Dear Customer, Congratulations on your purchase of MJK Expert Data Loggers, the next generation Data Logger! Before installation and use of your new device as per your requirements, it is recommended that you read these instructions carefully. They contain important information for successful operation of the MJK Log Link software.
Manual Table of Contents General information................................................................................................................................ 4 Measuring methods............................................................................................................................ 4 Relative measurement (Expert 900) .................................................................................................... 4 Absolute measurement (Expert 800) .....................
Manual Installation of Expert 900 Logger General information Fluid levels or fluctuations of a liquid can be determined by measuring the prevailing pressure at a lower depth and comparing it with the pressure at the surface. This enables an approximate calculation based on the density of the liquid. For example, in the case of water: 100mbar Η 100cm water column (WC).
Manual Absolute measurement (Expert 800) The Expert 800 instruments utilize an absolute pressure sensor. A second Expert 800 is positioned on the surface as a barometer where low water depths are involved (as the influence of air pressure fluctuations must also be taken into consideration), and the air pressure characteristic is recorded. The water level is then calculated in the PC program (MJK Log Link) as the difference between the two measured values.
Manual Adapter ring Seeger circlip The Expert 900 data loggers are lowered into the sinking pipe and fixed in position with an adapter ring. The respective adapter ring is screwed onto the Expert 900 and secured with the Seeger circlip ring supplied. It should be noted that the cable length selected initially for expert 900 is a fixed dimension and cannot be changed. The desired cable length should therefore be specified when ordering. 6 GB Manual Expert Log 800-900.
Manual Replacing the battery Battery: Sonnenschein 3.6V lithium AA type The Expert should be dried prior to opening to prevent water entering the instrument during opening. The data logger should only be opened or closed in dry ambient air! Expert 900 The battery is replaced by first removing the knurled nut, followed by the battery sleeve: O-rings Battery sleeve Expert 800 The bracket and knurled nut should be unscrewed first in the case of the Expert 800.
Manual Dip pipe installation Revolution in level metrology: Gone are the days of the costly measuring stations at the lakes and rivers. The new generation of level measuring stations presents itself inconspicuously and vandal-proof and can be set up at considerably lower costs compared to conventional systems. Here is an application example at a barrage: The dip pipe is firmly mounted at the measuring place.
Manual Additional recommendations: - - The battery capacity is not measured but calculated from the average current used. If the battery is replaced, as also upon Power-On-Reset, the display will be reset to 100%. A battery replacement is recommended if the battery capacity indicator displays a status of less than 30%. Continued read-out of large volumes of data is thereby guaranteed.
Manual Under Install Type, you may choose the type of installation: Typical and Compact: Default installation without additional modules Custom: Installation of additional modules like Conversion of data to e.g. CSV format and storm flow calculation.
Manual Finally, you can specify the Program Folder to be created under Programs in the Start menu. * Non-water level applications such as the rain logger are configured with the Writer. The Expert Log Link software package The software consists of three main programs and additional modules. Both the configuration programs Writer and WriterWL are used to read and update the settings of the connected device, as also to start and end recording.
Manual The configuration program (Writer / WriterWL) These programs are used for the configuration and starting/stopping of recordings as desired. Since the only difference between these programs is the water level configuration feature additionally provided in WriterWL, it is the latter's operation that is primarily described in detail in this manual. WriterWL 12 GB Manual Expert Log 800-900.
Manual Initialization The Expert Log needs to be initialized before communication can be established with it. This can be done by clicking Read Configuration. If a device is present, its settings are read in and displayed in WriterWL. The device type, serial number, device time and PC time as well as the (total) memory available in the device are listed in the status window. The status bar shows the current recording status as well as the current time.
Manual To reset a sensor to its factory setting, click Set Factory Zero respectively. To update the pressure values displayed, click Read Act Value(s). Options Configuration General: Setting the program language, activation/deactivation of auto detection of existing serial ports (changes will take place only upon program restart), and showing/hiding the picture. Units: The number of decimal places for the predefined units of pressure, temperature and length is specified here.
Manual Configuration functions Channels to record Here, the channels to record are selected by checking off the corresponding boxes: P1-P2 P1 P2 T TOB1 TOB2 Pressure Sensor 1 – Pressure Sensor 2 Pressure Sensor 1 Pressure Sensor 2 Optional temperature sensor Temperature Sensor 1 (Top of bridge) Temperature Sensor 2 (Top of bridge) Start time Specifies the time at which the device goes into recording mode at the earliest.
Manual Building Mean value after X measurements at 1 second intervals This function enables the averaging over "X" measurements at intervals of one second each. Recording is initiated only after the average has been determined, even if the recording interval chosen is smaller. For example, "Recording interval after event” = 1 second, X = 5:A measured value is recorded once every 5 seconds.
Manual Save if delta Channel > Val1 Recording only takes place if the measured value of the channel where event-driven recording is scheduled is greater by Val1 than the last recorded value. After Write Configuration a reference value will be recorded.
Manual Val1 Endless (circular memory) This function is enabled by the user for continuous recording by the device. That is to say, earlier values get overwritten when the memory is full. Without this setting, the device stops recording when the memory is full.
Manual Actual value If the Online function is activated by clicking Online, this field displays the current value of the selected channel. Updating takes place every second. In online mode, the recording status and memory status (in the status bar) as well as the battery capacity display are updated. It is likewise possible to display the current height to the desired length specification, taking into account the water level configuration settings.
Manual Offset: - Offset is a freely selectable value (positive or negative) which is added to the length calculated. The default value is 0. For example, by giving a value for Offset, the distance between the upper edge of the wellhead and the earth’s surface can be specified and therefore taken into consideration during the calculation. Water density / Calculate water density Entering the water density (for example. fresh water (20 °C) = 998.
Manual Operation of Writer / WriterWL Units Pressure Temperature Length/height Bar °C m mBar °K inch mWs °F foot Fixed units PSI Pa kPa MPa mmHg ATM yard Sample specification of user-defined units on the configuration screen The units set in the main window are used in all further dialog boxes. Read Configuration Initialization of the connected data logger is commenced by clicking this button. Stop Record Clicking this stops any recording already started.
Manual The Reader program (Reader) All recordings available in the device are listed by means of this program. Each recording selected is read out of the device and stored in a separate file. Depending on the selection of executing modules, these files are either further processed or only displayed. The files can also be processed later with the help of the individual modules. 22 GB Manual Expert Log 800-900.
Manual Initialization Before communications with the Expert Log can be established, the latter needs to be initialized. This is done by clicking on Read Contents. If a device is present, a table of all stored recordings is displayed. The device type, serial number, device time and PC-time as well as the (total) memory available in the device are listed in the status window. The status bar shows the current recording status as well as the current time.
Manual Modem: This page is needed for specification of a telephone number and additional initialization commands. Modem Connect: Disconnect: Connecting to a modem by dialling the previously recorded telephone number and initialization commands Disconnecting the modem Info Information about the software version and contact details for the company MJK is displayed. Read-out of stored data After initialization, a list of all available recordings is displayed.
Manual If a mark is set, a new recording starts. This means that at the next read-out of the active recording (only No. 1) only data recorded after the mark was set is included in the read-out. Description of individual modules Each module can be directly invoked from the reader (data is transferred automatically). If the module is invoked directly, the file to be processed can be read by clicking "File – Open...”. Air pressure-compensation (Air pressure-Comp.
Manual Click Convert to compensate each file with the selected air pressure. Warning! No new files are created; instead the values in the current files are overwritten. In addition a mark is set preventing second air pressure compensation. Conversion to Water level values (WL-Converter) Since the data logger pressure values are always measured and recorded in bar, this module is necessary for conversion to water level values.
Manual Creation of text data (Text-Converter) For display and/or further processing of measured values if required, conversion into a text file is necessary. This module creates such a file in tab-delimited format with the suffix ".txt". The file can be opened with any desired editor. It is however recommended that the file be imported into a commonly used spreadsheet program such as Microsoft Excel for a better overview.
Manual Write only recorded channels into File: - The Data Logger was designed for recording 15 channels (at present a maximum of 7 channels are implemented). If this option is not selected, all 15 channels are written out, whether they contain data or not. Due to this fixed assignment, a user macro or other program can always access the desired measured values. If this option is checked off, only recorded channels are written to the file.
Manual Sample file created using the Text-Converter, displayed in Microsoft Excel 29 GB Manual Expert Log 800-900.
Manual Display module (Viewer) This module is used for displaying the measured values read out. The user can select the following options to customize the view: - Channels to be displayed Pressure and temperature units Zoom in and zoom out of the graph Display of cross-hair, grid and legend For better view ability, the pressure values can be inverted and displayed. This is especially recommended for files with water level values (virtual representation of the water height). Under "File – Save as Bitmap..
Manual Files with water level values: If a file with converted water level readings is displayed, in older versions of the viewer, the pressure unit cannot be changed thereafter. This is indicated by the display of unit details [m] alongside the pressure channel. Example of a file converted into water level readings Hint: In Windows Explorer under "Extras – Folder options" specify Viewer as the program for opening files with the suffix "*.idc". Thereafter each .
Manual WISKI-Converter The design of this module is very similar to that of the Text-Converter. It is also used for creation of a text-file which can be used for further processing or for display. 32 GB Manual Expert Log 800-900.
Manual Under "Options – Configuration - General" there are two selectable formats. ZRXP-Format: If the data is converted into this format, it can be displayed and processed with the WISKI - TimeSeriesViewer from the firm Kisters (30-day demo version available here). CSV-Format: This format is a widely-used general semicolon-separated format with the following pattern: Date; Time; P1-P2 [bar];P1 [bar];P2 [bar];TOB1 [°C];TOB2 [°C] 29.11.2002;13:15:05;0,0001;0,9628;0,9626;22,9336;23,3125 ...
Manual Overstort-calculation (storm flow, Overflow calculation) In some countries (e.g. Holland, Belgium) water consumption is measured with the help of an overstort wall. The volume of water consumed is calculated from the measured water level minus the Trigger-invalue (Val1) configured with the WriterWL. This Trigger-in-value corresponds to the distance of the sensor from the overstort wall. Trigger-out (Val2) should be set to the value Trigger-in – 3cm, in order to attain a turn-off hysteresis.
Manual APPENDIX Sample application Recording configuration: Fixed Save-Interval = 1 hour Event = Save if delta Channel > Val1, Val1 = 0.5 bar Event-Detect Interval = 1 second Save-Interval during the Event: = deactivated, correspondingly also 1 second = Start Recording (1. measure for compare) p[bar] = Recording with fixed Save interval (1 h.) = Event-Recording (delta > 0.5 bar) at 1 sec. int. 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 t 16.08.02 12.30 12.00 13.00 13.30 14.00 14.
Manual As soon as the configuration has been written into the device, a first measured value is recorded (in the sample:Start recording at 12.00 p.m.). As per configuration, this measured value is compared every second with the current measured value, till the difference is 0.5 bar. This first happens at 13.15. The next recording takes place at 13.30, etc... Independent of that, each fixed Save-Interval (1 hour), an additional recording is done. At 17.
Manual Messages: Message REC-ERROR: Please perform a power-on reset ! Significance A problem occurred during the recording. battery must be removed and reinstalled. The BAT-ERROR: Please replace battery ! ACK-ERROR: Please perform a power-on reset ! The battery must be replaced There was a problem in saving during the recording. The battery must be removed and reinstalled. Device has changed, please read configuration first! The connected device was swapped out.
