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Summary of Contents for Ahlborn ALMEMO 2290-2/3
- Page 1 Operating Instructions Multifunctional Measuring Instruments ® ALMEMO 2290-2/3 V1.1 17.08.1999 AHLBORN Mess- und Regelungstechnik GmbH Eichenfeldstraße 1-3 · D-83607 Holzkirchen Tel. +49(0)8024/30070 · Fax +49(0)8024/300710...
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Page 2: Table Of Contents
Table of Contents Operating Instructions Multifunctional Measuring Instruments ® ALMEMO 2290-2 and -3 ® For Reference with the ALMEMO Manual Table of Contents Page INTRODUCTION Function Range Operating Controls INITIAL OPERATION POWER SUPPLY Battery Operation, Rechargeable Battery Operation External Power Supply Switch On/Off, Reinitialisation CONNECTION OF THE TRANSDUCERS Transducers... - Page 3 Table of Contents SENSOR PROGRAMMING Selecting the Input Channel Selecting the Measuring Range Changing the Dimension Limit Values Correction Values Scaling, Decimal Point Setting Locking the Programming of the Sensor MEASUREMENT Continuous Measurement of a Measuring Point 7.1.1 Selecting the Measured Value and Measuring Point 7.1.2 Memory for Momentary Values 7.1.3...
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Page 4: Introduction
ALMEMO connector system, which has been patented ® by Ahlborn GmbH. The intelligent ALMEMO connector provides important advantages with regard to the connection of sensors and peripherals as all parameters are stored in an EEPROM within the connector. As a result, the programming that usually is necessary for the connection is not required. - Page 5 Functions SENSOR PROGRAMMING ® The measuring channels are automatically programmed by the ALMEMO connectors of the sensors. However, the user can easily complete or modify the programming via keyboard or via interface. Measuring Ranges There are corresponding measuring ranges for sensors with a non-linear characteristic such as 10 thermocouple types, Ntc and Pt100 sensors, infrared sensors, and flow sensors (rotating vanes, thermoanemometers, pitot tubes).
- Page 6 Functions Scaling The base value and the factor allow for a further scaling of the corrected measured value of each measuring channel for zero point and slope (gain). The decimal point position can be set by the exponent. By setting to zero and entering the nominal value the scaling values can be automatically calculated.
- Page 7 Functions Difference The ALMEMO 2290-3 provides two differential measuring channels for both electrically isolated measuring inputs. If such a channel is selected, the measured values of both sensors are continuously determined and the difference is indicated and, if available, provided to an analogue output. Analogue Output and Scaling By means of analogue start and analogue end the indicated measured value can be scaled so that the resulting measuring range covers the full analogue...
- Page 8 Functions Print Cycle Factor If necessary, the print cycle factor allows for limiting the data output of particular channels so that an excessive data flow can be limited, especially during data storage. Measuring Cycle The measuring cycle, also programmable between 1s and 59h/59min/59s, is for a cyclic scanning with a display of all measured values, limit value monitoring including alarm message and output of alarm values, averaging and, if necessary, a storage of measured values.
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Page 9: Operating Controls
Operating Controls 1.2 Operating Controls (1) ON/OFF switch ( 3 ) down (2) Meas. Inputs M1, (M2 2290-3) ® CH1,(CH2) f. all ALMEMO sensors CH2 to CH4 additional channels (CH3 to CH11 additional channels 2290-3) (CH3, CH6 differential channels 2290-3) (3) Output Sockets OUT1, OUT2 OUT1 RS232 Interface (ZA 1909-DK) RS232 Fiber Opt. - Page 10 Operating Controls MEAS. VAL. START/STOP (2) FUNCTION KEYS CLEAR ENTER INPUT, +/-, for entering programming values INPUT, CLEAR clear data, set measured value to zero INPUT, calibrate measured value START/STOP cyclic measuring point scan select measuring point MEAS.VAL. select measured value, hold select measuring functions Max value (Hi) Min value (Lo)
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Page 11: Initial Operation
Initial Operation 2. INITIAL OPERATION 1. Connect transducers to the sockets CH1 (and CH2) (2), see 4. 2. Ensure power supply with 9V battery or mains adapter, see 3.1, 3.2. 3. For switching on move the slide switch (1) on the left side of the unit up, see 3.3. -
Page 12: Power Supply
Power Supply 3. POWER SUPPLY The following options are available for the power supply of the instrument: 9V battery IEC 6 F22 ZB 2000-B9 9V rechargeable battery, as above with charger unit integrated in plug ZB 2000-A9, ZB 2000-LS Mains adapter 12V/200mA ZB 2290-NA External power supply, connecting cable ZB 2290-UK... -
Page 13: External Power Supply
Power Supply Tips regarding correct handling of batteries: Do not leave used batteries in the instrument! Remove batteries from the instrument if it is not used for a long period. Risk to health and instrument failure can result from leaking batteries! Therefore, only use leak-proof batteries. -
Page 14: Switch On/Off, Reinitialisation
Power Supply 3.3 Switch On/Off, Reinitialisation The ON/OFF switch (1) on the left side of the device has two positions: down: For switch-on the slide switch (1) on the left side must be moved upwards. The device is switched off when the slide switch is moved to the lower position. -
Page 15: Connection Of The Transducers
Connection of the Transducers 4. CONNECTION OF THE TRANSDUCERS ® ® Any ALMEMO sensors can be connected to the ALMEMO input sockets (2) CH1 and CH2 of the measuring instrument. For connecting existing sensors it ® is only necessary to connect a corresponding ALMEMO connector. - Page 16 Connection of the Transducers The 5 analogue inputs are electrically isolated by using photovoltaic relays and a potential difference of 50V DC or 60V AC, at maximum, is permissible between them. However, sensors combined within one connector and sensors with an own power supply are electrically connected to each other and must, therefore, be operated in isolation.
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Page 17: Display And Keyboard
Display and Keyboard 5. DISPLAY AND KEYBOARD 5.1 Display and Function Selection ® The display (5) of the measuring device ALMEMO 2290-2/3 consists of an LCD module with six and a half 7-segment digits, two 16-segment digits, and a battery symbol and seven arrows for indicating the operating status. CORR AVERAGE START HOLD RS232C Special Operating Conditions Segment test of the display... -
Page 18: Selecting And Activating Functions
Display and Keyboard 5.2 Selecting and Activating Functions After a reinitialisation (see 3.3), the functions Max and Min Value are only available at first by using the key F1 and the measuring range by using key F2. Further to these basic functions, the instruments ALMEMO 2290-2/3 also provide a large number of additional functions for an optimal support of various sensors, for example for highest accuracy, implementing an automatic... -
Page 19: Keyboard
Display and Keyboard The abbreviation for the function is indicated at the right side of the value. If sensor parameters are involved the number of the channel is also indicated: 11:2.1 2 3 4 m Meas. Val.: chann. meas. value dimension 1: N i C r Range:... -
Page 20: Data Input
Display and Keyboard 5.4 Data Entry The programming of numeric parameters is performed as follows: The desired function can be selected by using keys F1 or F2... ENTER The programming is started by long pressing the key The first digit flashes and can be altered. -
Page 21: Sensor Programming
Sensor Programming 6. SENSOR PROGRAMMING ® As all ALMEMO instruments contain the whole sensor programming stored in ® the ALMEMO connector plug, the user does not usually need to perform any programming. Only if, for example, sensor errors must be corrected or existing sensors must be scaled or limit values need to be specified the comprehensive programming options have to be used. - Page 22 Sensor Programming Function RANGE ´ R´ 1: N i C r Select by using the key F2... Example: chan. CH1, range NiCr-Ni Changing the meas. range: ... or ... , ENTER ENTER Transducer Connector / Meas. Range Dim. Display Cable / Sensor ZA 9000-FS -200.0...
- Page 23 Sensor Programming Transducer Conn. / Cable Meas. Range Dim. Display Infrared 4 ZA 9000-FS -30.0... +100.0 °C Ir 4 Infrared 6 ZA 9000-FS 0.0... +500.0 °C Ir 6 FV A915-S120 0.30... 20.00 S120 Snap-on head Normal 20 Snap-on head Normal 40 FV A915-S140 0.40...
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Page 24: Changing The Dimension
Sensor Programming Switch-off, i.e. deactivation of a programmed measuring channel RANGE ´ R´ Function: Keys: CLEAR ENTER After switch-off the measured value is no longer indicated, queried, or provided as output. However, the programming is still maintained. Re-activation of the measuring channel: RANGE ´... -
Page 25: Limit Values
Sensor Programming 6.4 Limit Values Two limit values (MAX, MIN) can be programmed for a measuring channel. An exceeding of limit values is handled as fault, similar to an exceeding of measuring range limits or sensor breakage. The measured value will flash on the display, alarm relays will respond and alarm values will be output during a measuring cycle (s.man. -
Page 26: Scaling, Decimal Point Setting
Sensor Programming For some sensors special functions are available in this context: With pH probes, if the two keys START/STOP and F2 dare pressed during switch-on, the locking is only temporary, i.e. until the device is switched off and set to 3. An undesired adjustment can then be avoided. -
Page 27: Locking The Programming Of The Sensor
Sensor Programming on the display or printer. An exponential representation of measured values is not possible. Two-Point Adjustment The scaling values can be automatically determined by using a two-point adjustment. First, the measured value is, at its 'zero state' (ice water, unpressurized etc.), set to zero within the function MEAS. -
Page 28: Measurement
Continuous Measurement of a Measuring Point 7. MEASUREMENT ® The instruments ALMEMO 2290-2 and 2290-3 provide the following options for the acquisition of measuring data: 1. Continuous measurement of a selectable meas. point, s. 7.1 and man. 6.4. Output of measuring data to the analogue output, see 8. and manual 5.1.1. 2. -
Page 29: Memory For Momentary Values
Continuous Measurement of a Measuring Point 7.1.2 Memory for Momentary Values If a measured value shall be frozen at any point in time, for an easier evaluation, the key MEAS.VAL. must be operated again within the function MEAS.VALUE. This hold function is indicated by an arrow ´HOLD´ in the display. The clearing of the memory for momentary values can be performed by pressing the key MEAS.VAL. -
Page 30: Averaging
Continuous Measurement of a Measuring Point 7.1.5 Averaging The average value of the measured value is required for various applications: e.g. - the average flow velocity in a ventilating channel - smoothing of a largely varying measured value (wind, pressure etc.) - hourly or daily average values of weather data (temp., wind etc.) - as above, of consumption values (current, water, gas etc.) The average value of a measured value results when a number of measured... - Page 31 Continuous Measurement of a Measuring Point averaging mode of the selected channel ´ S t S t P ´ no cyclic measuring point scan (cycles stopped) no continuous measuring point scan (no C in conversion rate) 1. Select the function AVERAGE VALUE ´AV´ with using the key F1. 2.
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Page 32: Volume Flow Measurement
Continuous Measurement of a Measuring Point 7.1.6 Volume Flow Measurement For determining the volume flow in VF in ventilating channels the average flow velocity is multiplied with the cross section area CS: VF = 0.36 VF = m /h, = m/s, CS = cm The average flow velocity can be determined by a time-based averaging with rough air volume measurements at air vents (see 7.1.5 and man. -
Page 33: Setting The Measured Value To Zero, Zero Point Correction
Continuous Measurement of a Measuring Point 7.1.7 Setting Measured Value to Zero, Zero Point Correction Setting the Measured Value to Zero The user can zero the measured value at certain locations or at certain times to check the deviation from the reference value. The indicated measured value is, by the following key combination, stored as base value and set to zero. -
Page 34: Atmospheric Pressure Compensation
Continuous Measurement of a Measuring Point 7.1.8 Atmospheric Pressure Compensation Some measuring variables depend on the environmental atmospheric pressure (see 6.2 measuring range list ´with PC´). As a result, higher deviations from the normal pressure of 1013mbar can cause corresponding measuring errors: For example, error per 100 mbar: Compensation Range: Rel. -
Page 35: Single Measuring Point Scan
Single Measuring Point Scan 7.2 Single Measuring Point Scan (see manual 6.5.1.1) Measuring point scans can be used to acquire, indicate and, in most cases, to document data from the selected measuring point and also from other measuring points. If an interface module is connected to the socket OUT1 the functions PRINT CYCLE ´PC´, MEAS.CYCLE ´MC´, TIME ´ZT´... -
Page 36: Print Cycle
Cyclic Measuring Point Scan 7.3.1 Print Cycle For cyclic measuring point scans and outputs the print cycle can be set in the function PRINT CYCLE ´PC´. Function PRINT CYCLE ´PC´ 0 0:3 0:0 0 Select by using the key F1... 6-digit programming in format hh:mm:ss (s. -
Page 37: Analogue Output
Analogue Output 8. ANALOGUE OUTPUT For analogue acquisition of the selected measuring point either an analogue output cable ZA 1601-RK (see manual 5.1.1) without electrical isolation or a relay trigger analogue adapter ZA 8000-RTA (see manual 5.1.3) with electrically isolated analogue output can be connected to the sockets OUT1 or OUT2. -
Page 38: Digital Data Output
Digital Data Output 9. DIGITAL DATA OUTPUT Via serial interface the instrument and the sensor can be completely programmed, the programming can be queried (see man. sect. 6) or, as described in sections 7.2 and 7.3, manual and cyclic measurements can be provided as output to a printer or computer. -
Page 39: Device Address And Networking
Digital Data Output The output format is indicated by a letter between the output channel ´U´ and the baud rate. The key CH can be used to successively select the following options. Output Format Format Baud Rate 9 6 0 0 B R measured values in a list measured values in columns U n 9 6 0 0 B R... - Page 40 Digital Data Output The trigger cable can be connected to socket OUT1 and the external key can be used to trigger the following print outputs: Function Ab Ke Print Output 12:34:00 01: +0023.5 °C MEAS. VAL. MAXIMUM: 01: +0020.0 °C MAX VALUE MINIMUM: 01: -0010.0 °C MIN VALUE...
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Page 41: Troubleshooting
Troubleshooting 10. TROUBLESHOOTING ® The data logger ALMEMO 2290-2/3 can be configured and programmed in many different ways. It allows for a connection of many different sensors, additional measuring instruments, alarm signalisers and peripheral devices. Due to the large variety of options it is possible that, under certain conditions, it does not perform as the user would expect. -
Page 42: Electromagnetic Compatibility
Electromagnetic Compatibility Test the data transmission by using a terminal (AMR-Control, WIN-Control, DATA-Control, WINDOWS Terminal): Address the device with its device number Gxy (see manual 6.2.1), query the programming by P15 (see manual 6.2.3), only check the sending line by cycle input via command Z123456 and control in the display. -
Page 43: Appendix
Appendix Technical Data (see manual 2.2) Measuring Inputs: ® ® 2290-2: 1 ALMEMO socket for ALMEMO flat connector 2290-3: 2 ALMEMO ® sockets for ALMEMO ® flat connector Measuring channels: 2290-2: 1 primary channel 3 add. chann. for double sensors and function chann. 2290-3: 2 primary channels, electrically isolated 6 add. - Page 44 Appendix ALMEMO 2290-2/3...
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