Related Manuals for Ahlborn ALMEMO 2490-1A
Summary of Contents for Ahlborn ALMEMO 2490-1A
- Page 1 ____________________________ Operating instructions English Universal measuring instruments ® ALMEMO 2490-1A, 2490-2A V2.9 04.11.2021 www.ahlborn.com...
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Page 2: Operating Controls
OPERATING CONTROLS (1) Measuring inputs M0 and M1 M0 ... M1 for all ALMEMO ® sensors M2 Function channel, differential M10...M32 9 additional channels (2) unavailable (3) Outputs A1, A2 A1 Interface USB (ZA 19019-DKU) RS 232 (ZA 1909-DK5) Optic fiber (ZA 1909-DKL) Ethernet (ZA 1945-DK) 2nd analog output (ZA 1601-RK) A2 Network cable (ZA1999-NK5/NKL) -
Page 3: Table Of Contents
CONTENTS Operating controls ..................2 Contents ..................... 3 General ....................... 5 Warranty ..................... 5 Scope of delivery ................6 Waste disposal ................... 6 Safety instructions ..................7 Special notes on use ................. 8 Handling batteries / rechargeable batteries correctly ......8 Introduction .................... - Page 4 2. Contents 10.1.2 Measuring ranges ..............20 10.1.3 Double display ................. 22 10.2 Peak value memory ................. 22 10.3 Measured value memory ..............23 10.4 Relative measuring ................24 10.5 Sensor adjustment ................24 10.6 Differential measurement ..............25 Outputs ....................26 11.1 Interface ...................
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Page 5: General
GENERAL Congratulations on your purchase of this new and innovative ALMEMO meas- ® uring instrument. Thanks to the patented ALMEMO ® connector the device con- figures itself automatically; its operation should be fairly straightforward. The de- vice can, however, be used with such a wide range of sensors and peripherals and offers many different special functions. -
Page 6: Scope Of Delivery
3. General 3.2 Scope of delivery When you unpack the device check carefully for any signs of transport damage and ensure that delivery is complete. Measuring instrument ALMEMO ® 2490A with 3 AA alkaline batteries These operating instructions ALMEMO ® Manual CD with the ALMEMO Control software and various useful accessories... -
Page 7: Safety Instructions
SAFETY INSTRUCTIONS Danger to life and limb, risk of damage to equipment DANGER Read the instructions carefully before starting to operate the device. Please ensure that you comply with all general safety advice and the special safety instructions included in other chap- ters. -
Page 8: Special Notes On Use
4. Safety instructions 4.1 Special notes on use If the device is brought into the work-room from a cold environment • there is a risk that condensation might form on the electronics. In meas- uring operations involving thermocouples pronounced changes in tem- perature may cause substantial measuring errors. -
Page 9: Introduction
INTRODUCTION The ALMEMO ® 2490A is a new member in our family of unique measuring de- vices - all equipped with Ahlborn's patented ALMEMO ® connector system. The intelligent ALMEMO ® connector offers decisive advantages when connecting sensors and peripherals because all parameters are stored in an EEPROM lo- cated on the connector itself;... - Page 10 5. Introduction characteristic, e.g. 10 thermocouple types, NTC and PT100 probes, infrared sensors, and flow transducers (rotating vanes, thermoanemometers, Pitot tubes). For humidity sensors additional function channels are available for cal- culating humidity variables such as dew point, mixture ratio, vapor pressure, and enthalpy.
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Page 11: Measuring Operations
5. Introduction Sensor locking All sensor data stored in the connector EEPROM can be protected by means of a graduated locking function against undesired access. 5.1.2 Measuring operations For each transducer up to 4 measuring channels are available; i.e. it is also possible to evaluate double sensors, individually scaled sensors, and sensors with function channels. -
Page 12: Process Control
5. Introduction measured variables genuine differential measuring operations can be per- formed. 5.1.3 Process control (interface functions, see Manual Ch 6, not type L) To record the measured values from all connected sensors in digital form meas- uring point scanning is performed continuously with measured value output ac- cording to a time-based process control. -
Page 13: Initial Commissioning
6. Initial commissioning Software Each ALMEMO ® Manual is accompanied by the AMR-Control software pack- age, which can be used to configure the measuring instrument, to program the sensors, and to read out from the measured value memory. Using the integrated terminal, measuring operations can also be performed online. -
Page 14: Power Supply
POWER SUPPLY Power can be supplied to the measuring instrument in any of the following ways 3 AA alkaline batteries (included in delivery) Mains adapter 12V, min. 1 A with ALMEMO connector ZA1312-NAx ® Electrically isolated power supply cable (12 VDC, 0.25 A) ZA2690-UK 12V DC clamp connector to socket DC ZA1000-FSV... -
Page 15: Data Buffering
7. Power supply 7.6 Data buffering The sensor's programming is stored in the EEPROM on the sensor connector and the device's calibration and programmed parameters are stored in the EEPROM on the instrument itself, both on a fail-safe basis. Date and time-of- day are retained intact if the device is just switched off but are lost when the batteries are replaced. -
Page 16: Connecting The Transducers
CONNECTING THE TRANSDUCERS Virtually any ALMEMO ® sensor can be connected to ALMEMO ® input socket M0 (and / or M1 on version 2490-2) on the measuring instrument (1). To connect your own existing sensors you simply need the appropriate ALMEMO ® con- nector. -
Page 17: Potential Separation
8. Connecting the transducers On the measuring instrument this gives the following channel assignment : 8.3 Potential separation When organizing a properly functioning measuring setup it is very important to ensure that no equalizing current can flow between sensors, power supply, and peripherals. -
Page 18: Display And Keypad
DISPLAY AND KEYPAD 9.1 Display The display (5) on the ALMEMO ® 2490A measuring instrument is a 2-row LCD arrangement; the main field comprises 5x 7-segment digits (e) plus 2x 16-seg- ment digits (d) for depicting the measured value;,the function field comprises 41/2x 7-segment digits (b) for depicting various measuring functions (a);... -
Page 19: Keypad
9. Display and keypad Sensor correction or scaling : CORR arrow lights up. Unlocked to enable sensor adjustment : FREE arrow lights up. Checksum error in CALEr device calibration : Non-connected sensors, ----- deactivated measuring points : Measuring range / function not permitted : NiCr Sensor breakage... -
Page 20: Measuring Operations
10. MEASURING OPERATIONS With measuring instrument ALMEMO 2490A all available measuring channels ® are scanned by default semi-continuously; this permits continuous differential measurements and ensures continuous temperature compensation for dynamic pressure probes or chemical probes; (see Manual, Section 6.5.1.3). Up to 4 or 12 measuring channels (type 2) can be displayed; see 8.2- A measured value can be sent to an analog output;... - Page 21 10. Measuring operations Transducers Sensor / con- Measuring range Units Abbre- nector viation Fe-CuNi (L) ZA 9000-FSL -200.0... +900.0 °C FECO Fe-CuNi (J) ZA 9000-FSJ -200.0...+1000.0 °C IrCo Cu-CuNi (U) ZA 9000-FSU -200.0... +600.0 °C CUCO Cu-CuNi (T) ZA 9000-FST -200.0...
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Page 22: Double Display
10. Measuring operations Transducers Sensor / con- Measuring range Units Abbre- nector viation Enthalpy, psychrometric with PC FN A846 0.0 ... 400.0 P En Conductivity probe, with TC FY A641-LF 0.0 ... 20.000 sensor FY A600-CO2 0.0 ... 2.500 saturation with TC and PC FY A640-O2 0 ... -
Page 23: Measured Value Memory
10. Measuring operations To delete the maximum value press and hold down key : To delete the minimum value press and hold down key : To return to the measuring point display press key : M▲ As soon as you clear the memory, the current measured value will appear (be- cause measuring is continuous). -
Page 24: Relative Measuring
10. Measuring operations Relative measuring 10.4 One very useful function is to zero the meas- ured value at certain locations or at certain times as a reference value in order then to ob- serve only the subsequent deviations. This function is independent of the locking status and does not modify the programming param- eters in the connector. -
Page 25: Differential Measurement
10. Measuring operations The 1st time key is pressed the setpoint flashes in the display. The 2nd time key is pressed, adjustment is performed. To cancel adjustment press key M▲ 3. Gain adjustment For gain adjustment the gain calibration resources must be provided (see Table). -
Page 26: Outputs
11. OUTPUTS The following interfaces corresponding accessories or options either are neces- sary. (see 14.2). Interface 11.1 The ALMEMO ® 2490A version with the interface can not only be completely pro- grammed via the computer thus enabling the user to read out all acquired data (see Manual Ch 6) but also be networked together very easily thus enabling the user to centrally acquire and record measured values from several measuring instruments - even if these are located far apart (see Manual 5.3) . -
Page 27: Device Configuration
12. DEVICE CONFIGURATION On the ALMEMO ® 2490A measuring instru- ment a number of parameters can be config- ured. To do so when switching ON press and hold down key . The function field should then show an abbreviation for the parameter and the main field should show the value cur- rently set. -
Page 28: Automatic Switch Off
12. Device configuration Selecting the reference channel Which channel is in fact to be output via which analog output can also be stipu- lated by the user. To do this the parameters ´ACh1´, ´ACh2´, ´ACh6´, or ´ACh7´ must be configured as previously described. Scaling the analog output The output signal from each analog output variation (0 to 2 V) can be set for each sensor to any partial range (e.g. -
Page 29: Atmospheric Pressure Compensation
12. Device configuration different ways or even switched off in cases where there is a risk of accidentally activating relative measuring by zero-setting the measured value. Loc parameter : 0 The offset is saved in RAM, base or zero-point - depending on locking 1 The offset is saved in RAM only. -
Page 30: Trouble-Shooting
13. TROUBLE-SHOOTING The ALMEMO ® 2490A measuring instrument can be configured and pro- grammed in many versatile ways. It is suitable for connecting a wide variety of different sensors, additional measuring instruments, alarm signaling devices, and peripheral equipment. Given these numerous possibilities the device may in certain circumstances not behave quite as expected. - Page 31 13. Trouble-shooting Remedy: Check to ensure that all devices are set to different addresses. Address all devices individually via the terminal using command ´Gxy´. Addressed device is OK if at least ´y CR LF´ is returned as echo. If transmission is still not possible, unplug the networked devices. Check all devices individually on the data cable to the computer;...
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Page 32: Declaration Of Conformity
14. DECLARATION OF CONFORMITY... -
Page 33: Appendix
15. APPENDIX Technical data 15.1 (see Manual 2.3) Measuring inputs : 2490-1A ALMEMO ® socket suitable ® for all ALMEMO sensors ® 2490-2A 2 ALMEMO sockets, electrically isolated, suitable for ALMEMO ® sensors Measuring channels: 4 channels / socket for double sensors, function channels 2490-2A 4 internal additional channels... -
Page 34: Product Overview
15. Appendix Product overview 15.2 ® Universal measuring instrument ALMEMO 2490-1A Order no. 1 measuring input , 2-row LCD, 7 keys, measured value memory with 99 locations, battery supply ® 3 ALMEMO output sockets, A1, A2 for cables RS232, USB, Ethernet, analog, trigger, relay, DC socket for mains adapter MA 2490-1A ®... -
Page 35: Index
Index 15.3 Accessories ......34 memory data ......23 additional channels ....16 minimum value ......22 AMR-Control ......13 networking ........27 Analog output ......27 OFF ..........14 ON OFF analog output end ...... 28 ........19 analog output start ..... 28 Operating controls ...... -
Page 36: Your Contact
YOUR CONTACT AHLBORN Mess- und Regelungstechnik GmbH Eichenfeldstraße 1 83607 Holzkirchen Germany internet : http://www.ahlborn.com e-mail : amr@ahlborn.com Despite great care, incorrect information cannot be ruled out. Technical changes are reserved.