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____________________________

Operating instructions

Universal measuring instruments

ALMEMO

2490-1, 2490-2

V2.3

30.05.12

www.ahlborn.com

Содержание ALMEMO 2490-1

Страница 1: ...____________________________ Operating instructions Universal measuring instruments ALMEMO 2490 1 2490 2 V2 3 30 05 12 www ahlborn com...

Страница 2: ...adapter ZA1312 NA1 12V 0 2A Cable electr isol ZA2690 UK 10 30V RS485 option I ZA1000 FSV 5 LCD a Function b Measuring point 2nd meas value c Units for 2nd measured value d Units for 1st measured value...

Страница 3: ...itoring 14 7 2 Mains operation 14 7 3 External DC voltage supply 14 7 4 Sensor supply 14 7 5 Switching ON OFF reinitialization 15 7 6 Data buffering 15 8 CONNECTING THE TRANSDUCERS 15 8 1 Transducers...

Страница 4: ...dress and networking 27 12 2 Analog output 28 12 3 Automatic switch OFF 29 12 4 Device locking 29 12 5 Atmospheric pressure compensation 29 13 TROUBLE SHOOTING 30 14 DECLARATION OF CONFORMITY 32 15 AP...

Страница 5: ...ual ity tests We provide a guarantee lasting two years from delivery date that your device will function trouble free Before you send your device to us please observe the advisory notes in Chapter 13...

Страница 6: ...l of any such item as unsorted do mestic waste is strictly forbidden Please dispose of all packaging materials according to the applicable national waste management regulations Please dispose of cardb...

Страница 7: ...junction 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 light ning DANGER Risk of fatal inj...

Страница 8: ...if the batteries are empty remove the batteries this will prevent battery acid leaking onto the device and dam aging it Rechargeable batteries should be recharged as and when ne cessary You should nev...

Страница 9: ...rporates a large LCD display and a keypad An option is available with an internal electrically isolated analog output including a DC socket for a mains adapter socket P0 The standard version with inte...

Страница 10: ...initial adjustment e g expansion force pH can be freely interchanged Zero point correction and partly at least gain adjustment can be performed at the touch of a button Sensors with multi point calib...

Страница 11: ...e from any measuring point or a programmed value Measuring functions With some sensors to achieve optimal measured value acquisition certain special measuring functions are required Cold junction comp...

Страница 12: ...59 hh mm ss This function permits cyclic output of measured values to the interfaces and cyclic calculation of average values Print cycle factor The print cycle factor can be used to limit data outpu...

Страница 13: ...urposes of meas ured value acquisition via networked devices for graphical presentation and for more complex data processing 6 INITIAL COMMISSIONING 1 Connect sensor to socket M0 1 see 8 2 Ensure that...

Страница 14: ...g time will be approx 150 hours The current operating voltage is displayed each time the the device is switched on this gives you a basis for estimating the remaining operating time When the remaining...

Страница 15: ...Date and time of day are retained intact if the device is just switched off but are lost when the batter ies are replaced 8 CONNECTING THE TRANSDUCERS Virtually any ALMEMO sensor can be connected to...

Страница 16: ...l channels 2490 2 only A further innovation on this device is its four additional device internal chan nels The first of these M2 is programmed by default as differential channel M1 M0 This only appli...

Страница 17: ...voltage at the measuring inputs them selves must not exceed 5 volts between B C D A and The power supply is isolated by the transformer in the mains adapter or by a DC DC converter OA2490 U or ZA2690...

Страница 18: ...ply voltage Display after segment test Under 3 6 V LOBAT arrow lights up Relative measuring with respect to a reference value REL arrow lights up Sensor correction or scaling CORR arrow lights up Unlo...

Страница 19: ...nimum value see Section 10 2 MIN To delete press and hold down Zero setting the measured value see Section 10 4 CLR To delete press and hold down Saving the measured value see Section 10 3 MEM Display...

Страница 20: ...nt the measuring channel press M When switching between channels the abbreviation for the measuring range is briefly displayed see 10 1 2 10 1 2 Measuring ranges With each channel switchover or sensor...

Страница 21: ...FV A915 S220 0 50 20 00 m s S220 Snap on head micro 40 FV A915 S240 0 60 40 00 m s S240 Macro FV A915 MA1 0 10 20 00 m s L420 Water Micro FV A915 WM1 0 00 5 00 m s L605 Dynamic press 40 m s with TC an...

Страница 22: ...TC Temperature compensation PC Air pressure compensation 10 1 3 Double display On all double sensors incorporating a tem perature sensor on the 1st channel the tem perature value can at the same time...

Страница 23: ...pears in the function field preceded by the symbol M To return to the channel display press key M To display all memory data press and hold down key MEM The function field displays the last memory loc...

Страница 24: ...e for various instabilities With dynamic pressure probes ranges L840 and L890 units Pa the zero point must be temporarily adjusted by pressing key CLR i e until switching off even if the channel is lo...

Страница 25: ...ose see Man 6 2 6 10 6 Differential measurement On version 2490 2 if two sensors with the same units and same decimal point position are connected at measuring points M0 and M1 the difference M1 M0 ap...

Страница 26: ...ow appear see Chapter 12 here the reference channels for the corresponding analog outputs and the scaling requirements can be entered Or alternatively there are variants 2490 xR02 with 2 integrated el...

Страница 27: ...and scaling for Analog output P0 7 option see 12 2 Automatic switch OFF time in minutes see 12 3 Air pressure for measuring value compensation To enter a value first press ON and the value starts flas...

Страница 28: ...ial range e g 4 to 20 mA for 30 0 to 120 0 C For the previously specified reference channel the values for analog output start and analog output end plus analog output type 0 to 20 mA or 4 to 20 mA ca...

Страница 29: ...eter 0 The offset is saved in RAM base or zero point depending on locking 1 The offset is saved in RAM only 2 Relative measuring is locked 12 5 Atmospheric pressure compensation Measured variables dep...

Страница 30: ...uspicious sensors Connect hand held sensors in air or phantoms for thermocouples short circuit AB for PT100 sensors use 100 and check Connect the sensors again one at a time and check successively If...

Страница 31: ...ed devices Check all devices individually on the data cable to the computer see above Check the wiring for short circuit or crossed wires Are all network distributors supplied with power Network the d...

Страница 32: ...n any manner not agreed with us in advance this declaration becomes void When using the sensor with an extension care must be taken to ensure that wiring is not laid alongside or close to high voltage...

Страница 33: ...racy 0 1 of final value Temperature drift 10 ppm K Time constant 100 us Standard equipment LCD Measured value 5x 7 segment 15 mm 2x 16 seg ment 9 mm Function 4 x 7 segment 9 mm 9 symbols Operation 7 s...

Страница 34: ...0 2R02 Options Measuring ranges for temperature display of 10 refrigerants SB 0000 R DC power supply electr isol 10 to 30 VDC 10 mA clamp connectors OA 2490 U RS485 interface integrated including opti...

Страница 35: ...Device address 12 1 27 Device configuration 12 27 Device locking 12 4 29 Device internal channels 8 2 16 differential channel 8 2 16 Differential measurement 10 6 25 Display 9 17 Double display 10 1...

Страница 36: ...ce channel 12 2 28 reference value 10 4 24 reinitialization 7 5 15 Relative measuring 10 4 24 RS485 interface 11 1 26 Safety instructions 4 7 Scaling the analog output 12 2 28 Scope of delivery 3 2 6...

Страница 37: ...Index Trouble shooting 13 30 two point adjustment 10 5 24 Warranty 3 1 5 Waste disposal 3 3 6 WIN Control 5 1 3 13 Zero point adjustment 10 5 24 ALMEMO 2490 37...

Страница 38: ...mbH Eichenfeldstra e 1 83607 Holzkirchen Germany internet http www ahlborn com e mail amr ahlborn com Even the greatest possible care cannot exclude the possibility of inaccuracies We reserve the righ...

Страница 39: ...Your contact ALMEMO 2490 39...

Страница 40: ...15 Appendix 40 ALMEMO 2490...

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