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Related Manuals for Ahlborn Almemo 8990-8
Summary of Contents for Ahlborn Almemo 8990-8
- Page 1 Operating Instructions Data Logger ® ALMEMO 8990-8 V1.3 03.02.2004...
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Page 2: Table Of Contents
Table of Contents Operating Instructions Data Logger ® ALMEMO 8990-8 ® For reference with the ALMEMO Manual Table of Contents Page Introduction Function Range Operating Controls Initial Operation Power Supply Mains Supply Operation with Rechargeable Battery External Power Supply Battery Buffer Switch On/Off, Reinitialisation Connection of the Transducers Transducers... -
Page 3: 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. - Page 4 Functions 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). Humidity sensors are available with function channels that also calculate humidity data such as dew point, mixture ratio, vapour pressure and enthalpy.
- Page 5 Functions Limit Values and Alarm Two limit values (1 max and 1 min) can be set for each measuring channel. An alarm value printout can be performed if a limit value is exceeded and, by means of relay output modules, alarm contacts are provided that can be individually allocated to limit values.
- Page 6 Functions PROCESS FLOW PROGRAMMING A cyclic measuring point scan with a time-based process flow control is required to register the measuring data of all connected sensors. For this purpose, the real time clock, the print cycle and the measuring cycle are available and, if fast processing is required, the conversion rate is available.
- Page 7 Functions Numbering of Measurements Single scans or entire series of measurements can be identified and selectively read out from the memory. Control Outputs The interface allows to individually trigger up to four output relays and one analogue output. Keyboard Lock The keyboard operation can be locked with a password.
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Page 8: Operating Controls
Operating Controls 1.2 Operating Controls (1) ON/OFF SWITCH Instr. Lamp not pressed pressed with pow. supp.: Rechargeable battery optional: with pow. supp.: on (batt. is recharging) flashing (batt. is recharged) without pow. supp.: ON off (battery operation active) (2) CONNECTOR SOCKET U-DC mains adapter ZA 5090-NA2 12V, 800mA connector cable ZB 5090-EK 7-13V DC... - Page 9 Operating Controls (4) OUTPUTS V24 interface cable (ZA 1909-DK), V24 fiber optic cable (ZA 1909-DKL) RS 422 network branch box (ZA 5099-NVB) RS 485 network branch box (ZA 5085-NV) Centronics interface cable (ZA 1936-DK) A1 or A2 analogue output with cable (ZA 1601-RK) networking with network cable (ZA1999-NK) trigger input with cable (ZA 1000-EK/ET), 2 relay outputs with cable (ZA 1000-EGK/EAK)
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Page 10: Initial Operation
Initial Operation 2. INITIAL OPERATION 1. Connect transducers to the sockets 0 to 8 (3), see 4. 2. For power supply connect the mains adapter to socket U-DC (2), see 3. 3. For switching on press the ON/OFF push button (1), see 3.5. 4. -
Page 11: Power Supply
Power Supply 3. POWER SUPPLY 3.1 Mains Operation The mains adapter ZB 5090-NA2 (12V DC, 800mA) is used for the power supply to the instrument. It is connected to the socket U-DC (2) and is locked by turning it to the right. 3.2 Operation with Rechargeable Battery (Option A) With the option A, a NiCd rechargeable battery with 1.5 Ah will be installed, which allows, at a current consumption of approximately 15mA, an... -
Page 12: Switch On/Off, Reinitialisation
Connection of the Transducers 3.5 Switch On/Off, Reinitialisation For switching on the instrument, the ON/OFF push button (1) must be pressed. If the power supply unit is properly connected the green control lamp in the push button will be illuminated. The device can be switched off by operating the push button once again. -
Page 13: Measuring Inputs And Additional Channels
Transducers ALMEMO 2290 via keyboard. The sensor connector must be connected to the selected channel. When programming, it must be considered that factory-programmed parameters are, by a locking mode, protected against unintentional modification and that the locking level must first be reduced before desired changes can be performed (see manual 6.3.12). -
Page 14: Data Acquisition
Data Acquisition 5. DATA ACQUISITION ® The instrument ALMEMO 8990-8 provides the following options for the acquisition of measuring data: 1. Continuous measurement of a selectable measuring point, see manual 6.4 Possibly, an output of measuring data to an analogue output, see man. 5.1.1 2. -
Page 15: Data Memory
Data Memory 5.2 Cyclic Measuring Point Scan A cyclic measuring point scan can be started by using the key START if a measuring or print cycle has been programmed. The control lamp ´CYCLE´ will be continuously on afterwards and the measured values will be provided as output to a connected peripheral device. -
Page 16: Sleep Mode
Sleep Mode 5.4 Sleep Mode For long term monitoring with larger measuring cycles it is possible to operate the instrument in sleep mode by using a rechargeable battery (option A) or an external battery. Within this power saving mode the device will be switched off after each measuring point scan and be automatically switched on for the next scan after the cycle time has expired. -
Page 17: Troubleshooting
Troubleshooting 6. TROUBLESHOOTING ® The data logger ALMEMO 8990-8 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. Therefore, it is possible that, under certain conditions, it does not perform as the user would expect. -
Page 18: 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), internal coding switch must be considered for decimal address digits, programming must be queried with command P15 (see man. 6.2.3), sending line must be tested by single measuring point scan with s, if at least one sensor is connected the LED ´CYCLE´... -
Page 19: Appendix
Appendix Technical Data (see also Section 2.2 in Manual) Measuring Inputs: ® ® 9 ALMEMO sockets for ALMEMO connector Meas. channels: 9 primary chann. electr. isol., max. 27 addit. chann. for double sensors and function channels Sensor voltage supply: mains adapter: approx 12V, max. - Page 20 Appendix ® ALMEMO 8990-8...
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