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____________________________

Operating instructions

English

Universal measuring instruments

ALMEMO

2490-1A, 2490-2A

V2.9

04.11.2021

www.ahlborn.com

Содержание ALMEMO 2490-1A

Страница 1: ...____________________________ Operating instructions English Universal measuring instruments ALMEMO 2490 1A 2490 2A V2 9 04 11 2021 www ahlborn com...

Страница 2: ...r isol ZA2690 UK 12V ALMEMO connector ZA1000 FSV 5 LCD a Function b Measuring point 2nd meas value c Units for 2nd measured value d Units for 1st measured value e 1st measured value f Operational stat...

Страница 3: ...operations 11 5 1 3 Process control 12 6 Initial commissioning 13 7 Power supply 14 7 1 Battery operation and 14 7 2 Mains operation 14 7 3 External DC voltage supply 14 7 4 Sensor supply 14 7 5 Swit...

Страница 4: ...surement 25 11 Outputs 26 11 1 Interface 26 11 2 Analog outputs 26 12 Device configuration 27 12 1 Device address and networking 27 12 2 Analog output 27 12 3 Automatic switch OFF 28 12 4 Device locki...

Страница 5: ...ous quality tests We provide a warranty lasting two years from delivery date that your device will function trouble free Before you send your device to us please ob serve the advisory notes in Chapter...

Страница 6: ...ol Disposal of any such item as unsorted domestic waste is strictly forbidden Please dispose of all packaging materials according to the applicable national waste management regulations Please dispose...

Страница 7: ...unction with unsuitable peripheral equipment Use of the device for any purpose other than that for which it is intended Damage caused by electrostatic discharge or lightning DANGER Risk of fatal injur...

Страница 8: ...eir own integrated power supply are not electrically iso lated from one another 4 2 Handling batteries rechargeable batteries cor rectly When inserting batteries rechargeable batteries ensure that the...

Страница 9: ...Ch 7 The operating instructions you are now reading cover only those features and controls that are specific to this device Many sections therefore also refer to the more detailed description in the M...

Страница 10: ...rect units e g when a transmitter is connected Conversion between C Centigrade and F Fahrenheit is performed automatically Measured value designation Each sensor is identified by means of a 10 charact...

Страница 11: ...ach measuring point can be scaled by means of analog start and analog end in such a way that the measuring range thus defined covers the full range of the analog output 2 V 10 V or 20 mA At the analog...

Страница 12: ...it data output from particular channels this may be necessary in order to reduce excessive data flow especially while data is being saved Averaging over measuring point scans The measured values from...

Страница 13: ...tment by pressing key CLR 6 return to normal measured value by pressing and holding down key CLR see 10 4 7 Differential measurement 2490 2A only plug 2 sensors of same type into sockets M0 and M1 and...

Страница 14: ...al DC voltage supply The DC socket 4 can also be used to connect DC voltage 12 V minimum 200 mA This is via an ALMEMO connector ZA1000 FSV If however the power supply has to be electrically isolated f...

Страница 15: ...PROM 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...

Страница 16: ...ary provide up to 4 channels The ad ditional channels can be used in particular for humidity sensors with 4 measur ing variables temperature humidity dew point mixture ratio or for function channels E...

Страница 17: ...cally isolated by means of photovoltaic relays and a potential difference of maximum 50 VDC or 60 VAC is permissible between them Sensors combined within one connector and sensors with their own power...

Страница 18: ...ain field Display of measuring functions in the function field Measuring point Maximum value Minimum value Saved value Memory capacity Temperature value from double sensors Configuration of device add...

Страница 19: ...value flashes Undershoots measuring range Minimum value flashes 9 2 Keypad To operate the device a keypad with 7 keys is provided Function Key To switch ON the device see Section 7 5 ON OFF To switch...

Страница 20: ...l operating states possible for the meas ured value are explained in Section 9 1 10 1 1 Selecting a measuring point By pressing key M you can select one after the other all active measuring points and...

Страница 21: ...FrEq Pulse ZA 9909 AK2 0 65000 PULS Digital input ZA 9000 EK2 0 0 100 0 Inp Digital interface ZA 9919 AKxx 65000 65000 diGi Snap on head normal 20 FV A915 S120 0 30 20 00 m s S120 Snap on head normal...

Страница 22: ...FS C UbGt Measured value of Mb1 any MESS Cold junction temperature any C CJ Number of av values of Mb1 any n t Volume flow m3 h M Mb1 Q any mh FLou Timer any s tinE TC Temperature compensation PC Air...

Страница 23: ...n for about one second e g P02 The value most recently saved then appears in the function field preceded by the symbol M To return to the channel display press key M To display all memory data press a...

Страница 24: ...d L890 units Pa the zero point must be temporarily adjusted by press ing key CLR i e until switching off even if the channel is locked With the following chemical probes automatic two point adjustment...

Страница 25: ...value 7 00 and gain 0 1689 Temperature compensation On conductivity probes and O2 probes with an integrated temperature sensor temperature compensation is performed automatically For pH probes a tempe...

Страница 26: ...ing instruments even if these are located far apart see Manual 5 3 The data cables required for this purpose see Manual 5 2 are plugged into socket A1 The baud rate for all data cables is is programme...

Страница 27: ...M To delete parameters press CLR select the next digit or entry is completed ON To terminate or cancel configuration MEM 12 1 Device address and networking To communicate with networked devices it is...

Страница 28: ...reference channel press key M M To enter a value first press ON and the 1st digit starts flashing Each digit can be changed by pressing keys M or M To use negative values below zero press M To delete...

Страница 29: ...rmal pressure 1013 mbar involve certain measuring errors e g Error per 100 mbar Compensation range Rel humidity psychrometer approx 2 500 to 1500 mbar Mixture ratio capacitive approx 10 Vapor pressure...

Страница 30: ...ect the sensors again one at a time and check successively If a fault persists for any one connection then check all wiring if nec essary insulate the sensor and eliminate interference by using shield...

Страница 31: ...ssed wires Are all network distributors supplied with power Network the devices again one at a time and check successively see above If after performing the above listed checks and remedial steps the...

Страница 32: ...32 14 DECLARATION OF CONFORMITY...

Страница 33: ...lue 5x 7 segment 15 mm 2x 16 seg ment 9 mm Function 4 x 7 segment 9 mm 9 symbols Operation 7 silicone keys Memory 99 measured values on the RAM Date and time of day Software clock buffered by battery...

Страница 34: ...490 2A Accessories Top hat rail mounting OA 2490 HS Rubberized impact protection green ZB 2490 GS1 Mains adapter with ALMEMO connector 12 volts min 1 A ZA 1312 NAx DC adapter cable 10 to 30 V DC 12 V...

Страница 35: ...sured value memory 23 Measuring inputs 16 Measuring inputs 33 Measuring operations 20 Measuring ranges 20 memory data 23 minimum value 22 networking 27 OFF 14 ON OFF 19 Operating controls 2 operating...

Страница 36: ...Mess und Regelungstechnik GmbH Eichenfeldstra e 1 83607 Holzkirchen Germany internet http www ahlborn com e mail amr ahlborn com Despite great care incorrect information cannot be ruled out Technical...

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