Summary of Contents for Ahlborn ALMEMO 4490-2
- Page 1 Operating Instructions Switchboard Instrument ® ALMEMO 4490-2 V1.2 04.12.2003 ALMEMO 4490-2...
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Page 2: Table Of Contents
Table of Contents Operating Instructions Switchboard Instrument ® ALMEMO 4490-2 ® For Reference with the ALMEMO Manual Table of Contents Page INTRODUCTION Function Range Front Operating Controls Rear Operating Controls INITIAL OPERATION POWER SUPPLY Mains Operation DC Voltage Supply Data Storage, Reinitialisation CONNECTION OF THE TRANSDUCERS Transducers Measuring Inputs and Additional Channels... - Page 3 Table of Contents SENSOR PROGRAMMING Selecting the Measuring Channel Selecting the Measuring Range Changing the Dimension Limit Values Correction Values Scaling, Decimal Point Setting Locking of the Sensor Programming MEASUREMENT Continuous Measurement of a Measuring Point 7.1.1 Selecting the Measured Value and Measuring Point 7.1.2 Conversion Rate, Continuous Measuring Point Scan 7.1.3...
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Page 4: Introduction
® the 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 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 keypad or 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. Limit Values and Alarm Two limit values (optionally Max and/or Min) can be set for each measuring channel.
- Page 7 Functions 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 output range (0-2V, 0-10V or 0/4-20mA). Max and Min Value Each measurement involves an acquisition and storing of the maximum and minimum value.
- Page 8 Functions Output All measuring and programming data is, firstly, accessible via keypad and LED display. RS232, RS422 and a Centronics interface are available by using different interface cables. All data logs, stored measured values and programmed parameters can be provided as output to any peripheral equipment.
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Page 9: Front Operating Controls
Operating Controls 1.2 Front Operating Controls (1) LED DISPLAY 4-digit 7-segment and minus f. meas. and progr. values 2-digit 14-segment for dimension or function ® M1, M2, M3 (M0 clamp. conn. or ALMEMO (2) MEAS. CHAN. without display) (3) ALARM LAMPS A1 and A2 for limit value 1 and limit value 2 (4) FUNCTION KEYS ENTER, ▲... -
Page 10: Rear Operating Controls
Operating Controls 1.4 Rear Operating Controls 9 10 11 AHLBORN 230V~ 20mA (5) Power Supply 230 V AC, 50/60 Hz Option U 10..36 V DC S1-C1-Ö1 lim. value 1 (make and break) (6) Relay Contacts S2-C2-Ö2 lim. value 2 (make and break) -
Page 11: Initial Operation
Initial Operation 2. INITIAL OPERATION 1. For power supply, depending on the version (see type plate), connect mains supply 230 V AC or 10-36 V DC to terminals (5), see 3.1 and 3.2. ® 2. Connect transducer with ALMEMO connector to socket M1 or connect a sensor with bare ends to the clamping connector (8),see 4.2. -
Page 12: Connection Of The Transducers
Connection of the Transducers If the device is not functioning properly due to disturbances (e.g. electrostatic charging) or if incorrect programming must be avoided, the instrument can be reinitialised. The reset can be achieved if the key is pressed during switch-on. During this process the measuring data, time and date, as well as all internal data such as cycles, conversion rate, atmospheric pressure and function key assignment, will be cleared or set to their default values. -
Page 13: Measuring Inputs And Additional Channels
Connection of the Transducers 4.2 Measuring Inputs and Additional Channels ® Either the ALMEMO socket M (9) or the clamping connector (8) can be used ® as measuring input for the ALMEMO 4490-2. When using the clamping connector only one measuring channel is available and must be programmed ®... -
Page 14: Display And Keypad
Display and Keypad 5. DISPLAY AND KEYPAD 5.1 Display ® The display (1) of the instrument ALMEMO 4490-2 consists of a 6-digit LED display plus a minus sign. The first four digits indicate the measuring or programming value including the sign. The following two alphanumeric digits indicate the dimension in case of a measured value, or the selected function (see 6.1). -
Page 15: Selection And Activation Of Functions
Display and Keypad 5.2 Selection and Activation of Functions The keys MEAS.VAL.▲, F1 and F2 can be used to successively select the measured values of all channels as well as the following measuring and programming functions. For switching back to the previous channel or function the key must be pressed and held (approx. -
Page 16: Keypad
Display and Keypad 5.3 Keypad The keypad (4) has the following functions that are displayed below the keys: Function Normal Input ENTER Data Entry MEAS.VAL.▲ Selection Meas. Value, Measuring Point ▲ Selection of Measuring Functions ▼ Selection of Programming Functions The key ENTER is used for programming the parameters. -
Page 17: 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 18 Sensor Programming ▲ ▼ The keys can be used to select all possible ranges in the sequence given below. When the desired range is indicated in the display it can, by pressing the key again, be transferred including the correct dimension to the connector and the programming can be finished.
- Page 19 Sensor Programming Transducer Conn. / Cable Dim Display Meas. Range Digital input ZA 9000-EK2 0.0... 100.0 diGi Digital interface ZA 9919-AKxx -65000... +65000 Ir 1 ZA 9000-FS 0.0... +200.0 °C Infrared 1 Ir 2 Infrared 2 ZA 9000-FS 0.0... +800.0 °C Ir 3 Infrared 3...
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Page 20: Changing The Dimension
Sensor Programming The use of the function channels for the output of measuring and calculated variables with the corresponding reference channels is described in the manual section 6.3.4. Switch-off, i.e. deactivation of a programmed measuring channel Function: RANGE ´R´ Keys: ENTER After switch-off the measured value is no longer indicated, queried or provided as output. -
Page 21: Limit Values
Sensor Programming 6.4 Limit Values For monitoring the measured values each measuring channel allows for programming 2 limit values; generally, a maximum and a minimum value. When limit values are exceeded the corresponding control lamp (3) will be on. If the optionally available limit value relays (option G1 or G2) have been integrated, the related contacts (6), which can be used for activating an alarm circuitry, will also respond. -
Page 22: Correction Values
Sensor Programming 6.5 Correction Values The correction values ZERO POINT and SLOPE allow for correcting sensors with regard to zero point and slope (gain) (see manual 6.3.10). Corrected Meas. Value = (Meas. Value - ZERO POINT) x SLOPE Function ZERO POINT CORRECTION ´ZC´ 0 0 3 Selection with key F2... -
Page 23: Scaling, Decimal Point Setting
Sensor Programming 6.6 Scaling, Decimal Point Setting For indicating the electrical signal of a sensor as a measured value of a physical variable it is, in most cases, necessary to set a zero point shift and to perform a multiplication with a factor. The functions EXPONENT, BASE and FACTOR are available for this. -
Page 24: Locking Of The Sensor Programming
Sensor Programming 6.7 Locking of the Sensor Programming (s. man. 6.3.12) The function parameters of each measuring point are protected by the locking mode up to an adjustable locking level. Before any programming is performed the locking mode must be correspondingly lowered. If a dot following the locking mode is indicated on the display then a modification is not possible. -
Page 25: Measurement
Continuous Measurement of a Measuring Point 7. MEASUREMENT ® The switchboard instrument ALMEMO 4490-2 provides the following options for the acquisition of measuring data: 1. Continuous measurement of a selectable meas. point, see man. 6.4. Output of measuring data to the analogue output, see man. 5.1.1. 2. -
Page 26: Conversion Rate, Continuous Measuring Point Scan
Continuous Measurement of a Measuring Point 7.1.2 Conversion Rate, Continuous Measuring Point Scan The conversion rate can, if necessary, be increased from 2.5 (3) to 10 M/s (s. man. 6.5, 6.5.4). For this purpose, the function CONVERSION RATE ´CR´ must ▲... -
Page 27: Setting Measured Values To Zero, Zero Point Correction
Continuous Measurement of a Measuring Point 7.1.4 Setting Meas. Values 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 in order to check the deviation from this reference value. The indicated measured value is, by the following key combination, stored as base value and, as a result, set to zero. - Page 28 Continuous Measurement of a Measuring Point For some sensors special functions are available in this context: 1. With pH probes, if the two keys ENTER and F are pressed during switch-on, the locking is only temporary, i.e. until the device is switched off and set to 3.
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Page 29: Atmospheric Pressure Compensation
Analogue Output 7.1.5 Atmospheric Pressure Compensation Some measuring variables depend on the environmental atmospheric pressure (see 6.2 measuring range list ´w. PC´). As a result, higher deviations from the normal pressure of 1013mbar can cause corresponding measuring errors, e.g. error per 100 mbar: Rel. -
Page 30: Measuring Point Scans
Digital Data Output 7.2 Measuring Point Scans (see also manual 6.5.) Meas. point scans can be used to acquire, indicate and, in most cases, to document data from the selected meas. point and also from (up to 4) other channels. When a meas. -
Page 31: Scaling
Digital Data Output 8.1 Scaling For each analogue output it is possible to spread any partial range to the standard output signal of the three available options 0-2V, 0-10V, 0/4-20mA if the partial range covers at least 100 digits (e.g. 0-20mA for -10.0 to +50.0°C). To achieve this, the analogue output-start and the analogue output-end of the desired measuring range must be entered within the functions ´AS´... -
Page 32: Device Address And Networking
Digital Data Output The baud rate setting is only possible when the interface module is connected as the baud rate will be stored in the EEPROM of the module. As a result, it will ® also be applicable when using other ALMEMO devices. -
Page 33: Manual Data Output
-1-3 DK0 Un s. man. 6.2.5 BR F2 BAUD RATE AMR ALMEMO 4490-2 s. man. 6.2.3 CH RANGE LV-MAX LV-MIN BASE VAL D FACTOR EXP AVG COMMENT (Sensor 00:Ntc +040.00 - - - - - - °C 1.0123 E+0 - - - Temperature Programming) 01:°o H +0060.0 +0020.0 - - - %H - - - E+0 - - - Humidity... -
Page 34: Troubleshooting
Electromagnetic Compatibility 10. TROUBLESHOOTING ® The switchboard instrument ALMEMO 4490-2 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, they do not perform as the user would expect. -
Page 35: Electromagnetic Compatibility
Appendix 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 G12345 and control in the display. -
Page 36: Appendix
Appendix Technical Data (see also manual 2.2) Measuring Inputs: clamping connector for sensors with bare ends or ® ® 1 ALMEMO socket for ALMEMO flat connectors 1 primary chann., 3 add. channels f. double sensors and function channels Sensor Voltage Supply: 7...9V, max.
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