Ahlborn ALMEMO 2590-9 V5 User manual

Operating Instructions
Data Logger
ALMEMO®2590-9
V2.0
26.06.2003
ALMEMO®2590-9 1

Operating Controls
(1) ON/OFF switch
up ON
down OFF
(2) Meas. inputs M0 to M8
M0 ... M8 for all ALMEMO sensors
M10...M38 27 additional channels
(3) Output sockets A1, A2
A1 Interface V24 (ZA 1909-DK)
Fiber optics V24 (ZA 1909-DKL)
Centronics (ZA 1936-DK)
RS 422 (ZA 5099-NVL/NVB)
Analog output 1 (ZA 1601-RK)
A2 Network cable (ZA1999-NK/NKL)
Trigger input (ZA 1000-ET/EK)
Relay outputs (ZA 1000-EGK)
Analog output 2 (ZA 1601-RK)
(4) Control lamps
SLEEP sleep mode
CHARGE battery recharge
(5) Connector socket DC 12V
Mains adapter (ZB 2590-NA,12V,0.8A)
Cable, electr. isol. (ZB 2590-UK, 10-30V)
(6) LCD display
Status line
CCont.measuring point scan
!,"Start, stop measurement
REC Memory record
COM Output of meas. val.
|>, >| Meas. start, end progr.
R01 Alarm relay status
!, Light on, pause
!
Mains/batt. oper./charge stat.
13 lines für functions
function of keys F1, F2, F3, F4
(7) Operat. dial (▲▼ turn,!press)
M▲▼ meas. pt. select.
P!, F▲▼ function select.
P!, ▲▼, !... data input
(8) Control keys
PROG function selection, input
ESC function abort, menu
F1...F4 function keys (soft keys)
(9) Battery pack (back of unit)
6 R6 round cells NiMH batt. 7.2V
2 ALMEMO®2590-9
123
5
6
4
7
8
9
Operating Controls
C!REC COM |> >| R01
01:Temperature °C
1254.5
Max Value: 245.7°C
Min Value: ▼ 224.1°C
PrintCycle:00:00:00nU
MemoryFree: 0211.0kB
M▲PRINT START MANU
M▲PRINT START MANU

Operating Instructions
Data Logger
ALMEMO®2590-9
For reference with the ALMEMO®Manual
Table of Contents
Page
OPERATING CONTROLS 2
1 INTRODUCTION 6
1.1 Function Range 6
2 INITIAL OPERATION 11
3 POWER SUPPLY 12
3.1 Battery Operation and Supply Voltage Control 12
3.2 Mains Operation 12
3.3 External DC Voltage Supply 13
3.4 Switch On/Off, Reinitialisation 13
3.5 Data Buffering 13
4. CONNECTION OF THE TRANSDUCERS 14
4.1 Transducers 14
4.2 Measuring Inputs and Additional Channels 14
5 DISPLAY AND KEYPAD 16
5.1 Display and Menu Selection 16
5.2 Function Keys 17
5.3 Control Symbols 17
5.4 Function Selection 18
5.5 Data Entry 18
5.6 Locking of the Menus and the Keypad 19
6 MEASURING USING THE MEASUREMENT MENUS 21
6.1 Display of a Measuring Point 22
6.1.1 Selecting the Measuring Point 22
6.1.2 Peak Value Memory with Time and Date 22
6.1.3 Output of Menu Functions 23
6.2 Measuring Point Scans and Output 23
6.2.1 Manual Single Output/Storage of all Measuring Points 23
6.2.2 Cyclic Output/Storage of all Measuring Points 24
ALMEMO®2590-9 3
Table of Contents

Page
6.2.3 Print Cycle, Timer, Output Format 24
6.2.4 Displaying Measured Values as a Line Chart 24
6.2.5 Continuous Output/Storage of all Measuring Points 25
6.2.6 Memory Space, Memory Output, Clearing the Memory 25
6.3 Correction of the Measured Value and Compensation 26
6.3.1 Setting the Measured Value to Zero 26
6.3.2 Sensors adjustment, Zero Point and Slope 26
6.3.3 Setpoint Entry 27
6.3.4 Temperature Compensation 28
6.3.5 Atmospheric Pressure Compensation 28
6.4 Averaging 29
6.4.1 Attenuation of Meas. Values 29
6.4.2 Averaging Mode 30
6.4.3 Averaging over Manual Single Measurements 30
6.4.4 Averaging over Cyclic Measuring Point Scans 31
6.4.5 Averaging over Time 32
6.4.6 Measurement Time 32
6.4.7 Volume Flow Measurement 33
6.5 Display of Several Measuring Points 34
6.5.1 Menu Multi Channel Display 34
6.5.2 Menu Meas. Point List 35
6.6 Configuration of User Menus 36
6.6.1 Function Printouts 39
6.6.2 Configuration via Interface 40
7 TIMES AND CYCLES 41
7.1 Time and Date 41
7.2 Print Cycle with Storage Activation, Output Format 41
7.3 Measuring Cycle and Storage Activation 42
7.4 Conversion Rate, Continuous Measuring Point Scan 42
7.5 Time and Date of Start, Time and Date of End 43
8 DATA MEMORY 44
8.1 Option Smart Media Card 44
8.2 Data Acquisition 45
8.3 Numbering of Measurements 46
8.4 Memory Display 46
8.5 Memory Output 47
8.6 Sleep Mode 48
4 ALMEMO®2590-9
Table of Contents

Page
9 SENSOR PROGRAMMING 50
9.1 Selecting the Input Channel 50
9.2 Measuring Point Designation 51
9.3 Averaging Mode 51
9.4 Locking of the Sensor Programming 51
9.5 Limit Values 52
9.6 Scaling, Decimal Point Setting 52
9.7 Correction Values 53
9.8 Changing the Dimension 53
9.9 Selecting the Measuring Range 53
9.10 Special Functions 56
9.10.1 Print Cycle Factor 56
9.10.2 Minimum Sensor Supply Voltage 56
9.10.3 Limit Value Responses, Relay Allocation 57
9.10.4 Analog Output Start/End 58
9.10.5 Output Function 58
9.10.6 Reference Channel 59
9.10.7 Multiplexer 59
9.10.8 Element Flags 59
10 DEVICE CONFIGURATION 60
10.1 Device Designation 60
10.2 Device Address and Networking 60
10.3 Baud Rate, Data Format 61
10.4 Language 61
10.5 Illumination and Contrast 61
10.6 Atmospheric Pressure 61
10.7 Hysteresis 61
10.8 Operating Parameter 62
11 OUTPUT MODULES 62
11.1 Data Cable 62
11.2 Relay Trigger Cable, Configuration, Relay Triggering 63
11.3 Analog Output, Scaling, Channel Selection, Programmed Output 64
12 TROUBLESHOOTING 65
APPENDIX
Electromagnetic Compatibility 66
Technical Data 67
Product Overview 67
Keyword Index 68
ALMEMO®2590-9 5
Table of Contents

1. INTRODUCTION
The data logger ALMEMO®2590-9 is a new instrument from the unique
product range of measuring devices that are all equipped with 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. As a result, the programming that usually has
to be performed for the connection is not required. All sensors and output
modules can be connected to all ALMEMO®measuring devices in the same
way. The operation and programming is identical with all units. Therefore, all of
the ALMEMO®measuring system items listed below are described, in detail, in
a separate ALMEMO®manual that is supplied with every device:
Detailed description of the ALMEMO®system (manual section 1)
Overview of the device functions and measuring ranges (manual section 2)
All sensors with basic principles, operation, technical data (man. section 3)
The options for connecting existing sensors (manual section 4)
All analog and digital output modules (manual section 5.1)
The interface module RS232, fiber optics, Centronics (manual section 5.2)
The entire ALMEMO®networking system (manual section 5.3)
All functions and their control via the interface (manual section 6)
A complete interface command list with all print outputs (manual section 7)
These operating instructions only cover features and controls that are specific
for a certain device. As a result, many sections will often provide a note
referring to the more detailed description within the manual (man. sect. x.x.x).
1.1 Function Range
The ALMEMO®2590-9 data logger has 9 electrically isolated measuring inputs
with up to 36 measuring channels for more than 65 measuring ranges, a real
time clock and a 500kB memory for approximately 100000 measured values.
External memory devices can be attached as an option. The device can be
operated by means of the LCD graphic display, a softkey keypad and an
operating dial. User menus can be configured to adapt the display for any
application. Two output sockets allow for connecting any ALMEMO®output
modules, for example, the analogue output, digital interface, trigger input or
alarm contacts. Several devices can be networked by simply connecting them
with network cables.
SENSOR PROGRAMMING
The measuring channels are automatically programmed by the ALMEMO®
connectors. However, the user can easily complete or modify the programming via
keyboard or via interface.
6 ALMEMO®2590-9
Function Range

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. Even complex
chemical sensors can be used. The acquisition of measured data from other sensors
is easily possible by using the voltage, current and resistance ranges with individual
scaling in the connector. Existing sensors can be used without problems. Only the
corresponding ALMEMO®connector has to be connected using its terminals.
Furthermore, there are adapter connectors with an own microcontroller for digital
signals and for measuring frequencies and pulses. This way, nearly all sensors can be
connected to any ALMEMO®measuring instrument and are interchangeable without
requiring any settings.
Function Channels
Maximum, minimum, average values and differences of certain measuring junctions
can be programmed as function channels and can be processed and printed like
normal measuring junctions. Furthermore, function channels for special measuring
tasks are provided to determine the temperature coefficient Q/∆T and wet bulb globe
temperature.
Dimension
The 2 digit dimension can be altered for each measuring channel so that the display
and the printout will always indicate the correct dimension, for example when a
transmitter is connected. The conversion from °C to °F is automatically performed
according to the dimension.
Name of Measured Values
For identification of the sensors a 10-digit alphanumeric name is provided. It is entered
via the keypad or the interface and appears on the display, the printout or the
computer display.
Correction of Measured Values
For correcting measured values a zero point and slope (gain) correction can be
applied to the measured value of each measuring channel. This also allows for
sensors to be interchanged that usually, at first, require an adjustment (expansion,
force, pH). The zero point and the slope (gain) correction are virtually performed by
the push of a button.
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. By setting to zero and entering the nominal value
the scaling values can be automatically calculated.
ALMEMO®2590-9 7
Function Range

Limit Values and Alarm
Two limit values (1 max and 1 min) can be set for each meas. 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. As a standard, the hysteresis is set to 10 digits; however, it can also be
adjusted between 0 and 99 digits. Furthermore, limit value exceeding can also be
used to start or stop a data logging.
Sensor Locking
All sensor data stored in the EEPROM of the connector can be protected against
undesired access by means of a graded locking function.
MEASUREMENT
A total of up to 36 meas. channels are available for 9 transducers, i.e. it is also
possible to evaluate double sensors, individually scaled sensors, or sensors with
function channels. The meas. channels can be successively selected forwards or
backwards via keypad or operating dial. As a standard, the meas. values of all active
meas. channels are continuously acquired at a rate of 10 meas.points/sec and
indicated on the display or, if available, provided on the analog output. In case of a
large number of meas. points the meas. point scan can be limited to one selectable
meas. point to increase the response speed.
Measured Values
The measured values of 1 to 20 measuring points can be indicated on the
display in 7 different menus (that can also be configured) in three font sizes, as
bar graph or as line chart. They are automatically acquired with auto zero and
self calibration and can also be arbitrarily corrected and scaled as required. A
sensor breakage condition is, with most sensors, automatically detected.
Analog Output and Scaling
By means of analog start and analog end any measuring point can be scaled so that
the resulting measuring range covers the full range of the bar graph or line chart or of
an analog output (2V, 10V or 20mA). The measured value of any measuring point as
well as a programmed value can be output to the analog output
Measuring Functions
Special measuring functions are required for some sensors to achieve an optimal
data acquisition. The cold junction compensation is available for thermocouples, a
temperature compensation for dynamic pressure and pH and conductivity probes,
and an atmospheric air pressure compensation for humidity sensors, dynamic
pressure sensors and O2 sensors. With infrared sensors the parameters zero point
and slope correction are used for background temperature and emissivity factor.
Max and Min Value
Each measurement involves an acquisition and storage of the Max value and the Min
value including the time and date. The values can be displayed, printed or cleared.
Average Value of a Channel
8 ALMEMO®2590-9
Function Range

A manual averaging over a particular period or over single measurements is available
for the selected channel.
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. The measurement can be started and
stopped by using the keyboard, the interface, an external trigger signal, the real time
clock or an exceeding of limit values.
Time and Date
The real time clock with date function or the pure measuring time are used for an
accurate recording of any measurement. Start and end time/date can be programmed
in order to start or stop a measurement.
Print Cycle
The print cycle is programmable between 1s and 59h/59min/59s and provides a cyclic
output of measured values to the interfaces or memories and also provides a cyclic
averaging.
Print Cycle Factor
If necessary, the print cycle factor allows for limiting the data output of particular
channels so that an excessive data flow can be limited, especially during data storage.
Measuring Cycle
The measuring cycle, also programmable between 1s and 59h/59min/59s, is
for a cyclic scanning with limit value monitoring, alarm message, output of
alarm values, averaging and, possibly, data storage.
Average Value over Measuring Point Scans
The measured values resulting from scanning measuring junctions can be averaged
as desired either over the total measuring time or over the print cycle time. Function
channels are available for a cyclic output and storage of these average values.
Conversion Rate
With the ALMEMO®2590-9 all measuring points can be continuously scanned with
the conversion rate (2.5;10 or 50 M/s). To realize a high recording speed it is possible
to store all measured values in the memory and/or to perform an output via the
interface.
Data Memory
During the measuring or print cycle, all measured values or alarm values can be
manually or automatically stored in a buffered RAM. The memory capacity is, as
standard, 500kB, which allows up to 100000 measured values. The memory
organisation can be configured as linear or ring memory. As an option, a Smart Media
Memory Card up to 32 MB can be used as storage device. The programming is
ALMEMO®2590-9 9
Function Range

saved with each change of the configuration. The output can be carried out via the
display or the interface. It is possible to specify a selection according to a time interval,
number or alarm value.
Numbering of Measurements
By entering a number, single scans or entire series of measurements can be identified
and selectively read out from the memory.
Control Outputs
Via keyboard and interface allows to individually trigger up to 4 output relays and one
analog output.
Operation
All measuring and function values can be displayed in different menus on the dot
matrix LCD display. 3 user menus can be individually configured from nearly 50
functions for your specific applications. Using texts, lines and blank lines allows to
format the printout in an application-specific style. 6 keys (four of them are soft keys)
and an operating dial can be used to operate the device. This also allows you to fully
program the sensors, the device and the process control. A graded locking function
including a password lock is available to limit the access to the menu and the
operating keys, as required.
Output
All data logs, menu functions and stored measured values and programmed
parameters can be provided as output to any peripheral equipment. Various interface
cables can be used to provide a RS232, RS422, Centronics or Ethernet interface.
The output of measuring data can be selected in list format, columns or spreadsheet
format. Files in spreadsheet format can be processed by each spreadsheet software.
The print header can be programmed specifically to the company or application.
Networking
All ALMEMO®devices can be addressed and can be easily networked by simply
linking them using network cables, or RS422 network distributors for longer distances.
Software
The AMR-Control software, which allows for the entire programming of the sensors,
the configuration of the measuring instrument and the read-out of the data memory is
supplied with each ALMEMO®manual. The integrated terminal also allows for online
measurements. The WINDOWS®software packages, WIN-Control and
DATA-Control, are available for data acquisition of networked devices, graphical
presentation and complex data processing.
10 ALMEMO®2590-9
Function Range

2. INITIAL OPERATION
Sensor connection Connect transducers to the sockets M0 to M8 (2), s. 4.
Power supply Internal battery or mains adapter, see 3.1, 3.2
Switch-on Move the left slide switch (1) upwards, see 3.4
Displaying meas. data Keys
Call up the main menu ´ALMEMO 2590-9´if required ESC
Select menu F3 or <F▲>...
StandardDisplay
Call up menu PROG
StandardDisplay
Select meas. point. Meas. value, max/min value will be displayed. F1 or <M▲>
Clear max/min values: Select function PROG, F4<F▼>...
Max/MinVal
- Clear single value F1 or <CLR>
- Clear max/min and average values of all channels, s. 6.1.2 F2 or <CLRA>
For output of measuring data or memory via interface:
- Connect peripheral device, via interface cable, to socket A1, see man. 5.2
- Set 9600bd, 8 data bits, 1 stop bit, no parity at peripheral device
- Set output format ´ ´, columns ´n´ or table ´t´, as required, see 7.2
Output and storage of measuring data Keys
Single output/storage of all measuring points, see 6.2.1 F4 or <MANU>
Enter print cycle for cyclic measurement, see 7.2
Enter the current time and date, as required, see 7.1
Start/stop the cyclic measurement, see 6.2.2 F3 / <START/STOP>
Output of memory data to printer or computer
Select the function PROG, F4 /<F▼>...
MemoryFree
Memory data output, s. 6.2.6 F2 or <PRINT>
Clear memory PROG, F1 /<CMEM>
ALMEMO®2590-9 11
Initial Operation
PROG F1 F2 F3 F4 ESC
* ALMEMO 2590-9 *
Locked: M0T0 ----
M StandardDispl
9 S1 DataLogger
8 S2 LineChart
7 S3 MultiChannDispl
6 MeasPointList
5 Memory
4 Times, Cycles
3 SensorProgramming
2 ..SpecialFunctions
1 DeviceConfiguration
1 OutputModules
StandardDisplay
*ON S/U F▲F▼
F1 F2 F3 F4
C!REC COM |> >| R01 "
01:Temperature °C
1254.5
Max Value: 245.7°C
Min Value: ▼224.1°C
PrintTimer:00:00:00nU
MemoryFree: 0211.0kB
M▲PRINT START MANU

3. POWER SUPPLY
The following options are available for the power supply of the instrument:
NiCd batt. pack 7.2V built-in or supplement. batt.pack ZB 2590-AP
Mains supply unit or battery charger 12V/800mA ZB 2590-NA
Electr. isol. power supply cable (10..30V DC, 1A) ZB 2590-UK
Our product line includes corresponding accessories.
3.1 Battery Operation and Supply Voltage Control
A battery pack with 6 NiMH cells (7.2V/1600mAh) is used as the standard
power supply of the device. At a current consumption of approx 31mA, they
last for an operating time of 52 hours. If the illumination is constantly switched
on, this operating period is reduced to approx. 28 hours. To extend the
operating time for long term recording it is possible to operate the device in
Sleep Mode (s. 8.6) or to just switch the display off. When a remaining battery
capacity of approx. 10% is reached, the symbol will be indicated in the
status line of the display. Generally, the batteries should then be recharged
using the supplied mains adapter ZB 2590-NA, otherwise the batteries can
suffer damage from deep discharge. If the battery is completely discharged,
the instrument will switch off. However, meas. data and time will be maintained
in the battery buffered memory (see 3.5). A supplementary battery pack ZB
2590-AP can be used in exchange to immediately continue the device
operation.
Tips regarding the correct handling of rechargeable batteries:
In most cases, the batteries supplied are not charged when delivered!
If NiMH cells are only partly discharged, the full capacity cannot be
reached by a normal recharging.
Therefore,use the device until the batteries are nearly totally discharged.
Completely recharge the batteries afterwards.
As a result, the life of the batteries is significantly increased.
Completely recharged batteries will slowly discharge during storage,
therefore, they should be charged at least once per month.
The current battery voltage can be checked in the device configuration,
allowing an estimation of the remaining operating time.
3.2 Mains Operation
For external supply of the instrument and for recharging the batteries the
supplied mains adapter ZB 2590-NA (12V/800mA) must be connected to the
socket DC (5). After plugging in, the small lamp ´CHARGE´ is illuminated and
indicates that the batteries are being recharged. The batteries are recharged
after 4 hours, at maximum, and the small lamp switches off, i.e. the charger
circuitry has switched to trickle charge. The mains adapter can, offering a
buffer operation, stay continuously connected to the measuring instrument.
12 ALMEMO®2590-9
Power Supply

3.3 External DC Voltage Supply
It is also possible to connect another DC voltage, 12V ±5% (800mA), to the
socket DC (5). The connection is performed by using a low voltage connector
(NES1 according to DIN 42323), center pin to minus. However, the electrically
isolated supply cable ZB 2590-UK must be used if an electrical isolation
between power supply and transducers is required or if a larger input voltage
range 10...30V is required. It allows to operate the measuring instrument with
12V or 24V on-board supply systems.
3.4 Switch On/Off, Reinitialisation
The slide switch (1) on the left side must be used to switch the device on or off.
up: ON
down: OFF
After switch-off the real time clock continues its operation and all stored data
remains available by a buffer battery (see 3.5). If the device was operating in a
measurement menu before switch-off it will return to the corresponding menu
after switch-on, otherwise the main menu will be displayed.
If the device shows an irregular behaviour due to interference influences (e.g.
electrostatic charging or discharged buffering battery) or if incorrect
programming must be avoided, the device can be reinitialised. The reset can
be achieved if the key F1 is pressed during switch-on. All internal data such as
maximum and minimum values and the data memory will be cleared and the
user menus will be set to the delivery defaults. Furthermore, cycles, time, date
and device address are set to zero and the conversion rate and atmospheric
pressure will be set to the standard values. However, the device configuration
and the sensor programming within the ALMEMO®connectors will not be
affected by the reset.
3.5 Data Buffering
The sensor programming is stored in the EEPROM of the sensor connector,
the calibration of the instrument is fail-safe stored in the EEPROM of the
instrument. The instrument, measuring data, as well as the time and date are
buffered by the lithium battery so that storage of the data is also guaranteed
when the device is switched off or when the batteries are discharged.
ALMEMO®2590-9 13
Connection of the Transducers

4. CONNECTION OF THE TRANSDUCERS
Any ALMEMO®sensors can be connected to the ALMEMO®input sockets M0
to M8 of the measuring instrument (2). For connecting existing sensors it is
only necessary to connect a corresponding ALMEMO®connector.
4.1 Transducers
A detailed description of the comprehensive ALMEMO®sensor range (see
manual section 3) and the connection of existing sensors (see manual section
4) to the ALMEMO®instruments are provided in the ALMEMO®manual. All
standard sensors with ALMEMO®connector usually have the measuring range
and dimension already programmed and can be immediately connected to any
input socket. A mechanical coding ensures that sensor and output modules
can only be connected to the correct sockets. Furthermore, each ALMEMO®
connector has two locking levers that snap in when the insertion into the socket
is established and that prevent a disconnection caused by pulling the cable.
Both levers must be pressed on the sides for disconnecting the connector.
4.2 Measuring Inputs and Additional Channels
The measuring instrument ALMEMO®2590-9 has 9 input sockets (2) that the
measuring channels M0 to M8 are initially allocated to. However, ALMEMO®
sensors can, if required, provide up to 4 channels so that 36 channels are
available with 9 input sockets. The additional channels can be especially used
with humidity sensors with 4 measuring variables (temperature/humidity/dew
point/mixture ratio) or used for function channels. If required, the sensor can
also be programmed with several ranges or scaling or, depending on the pin
assignment, 2 or 3 sensors can be combined in one connector (e.g. rH/Ntc,
mV/V, mA/V etc.). The additional measuring channels of a connector are
increased in steps of 10 (e.g. the first sensor has the channels M0, M10, M20,
M30, the second sensor has the channels M1, M11, M21, M31 etc.).
00 01 0502 0603 0704 08
10 11 1512 1613 1714 18
20 21 2522 2623 2724 28
30 31 3532 3633 3734 38
Channel 1
Channel 2
Channel 3
Channel 4
M0 M1 M5M2 M6M3 M7M4 M8 A2 A1
14 ALMEMO®2590-9
Connection of the Transducers

The 9 analog inputs are electrically isolated by using
photovoltaic relays and a potential difference of 50V DC or 60V
AC, at maximum, is permissible between them. However,
sensors combined within one connector and sensors with an
own power supply are electrically connected to each other and
must, therefore, be operated in isolation. The voltage applied
to the measuring inputs must not excee +/-12V (between
B,C,D and A or - respectively).
The cold junction compensation for thermocouple measurement is integrated
in socket M4 of the device.
ALMEMO®2590-9 15
Connection of the Transducers

5. DISPLAY AND KEYPAD
5.1 Display and Menu Selection
The display (6) of the measuring instrument ALMEMO 2590-9 consists of a dot
matrix LCD display with 128x128 dots, or 16 lines with 21 characters each,
respectively. 11 standard menus and 3 user-definable ´user menus´ U1, U2,
U3 are available and can be selected at the main menu for the acquisition of
measuring data in connection with the required functions and for the
programming of the process control, the sensors and the device parameters.
If necessary, call up the main menu using the key ESC
Switch-on of the display illumination (see 10.5) F1 <*ON>
Selection among standard or user menus (S1..S3/U1..U3)F2 <S/U>
Selection of the menus F3 <F▲>, F4 <F▼>
Calling up the selected menu PROG
Alternatively, the operating dial (7) on the right side of the
device can be used by turning it upwards or downwards
and pressing the dial at the side to confirm.
Returning to the main menu is only possible by using the key ESC
A graded locking function incl. a password lock is available to limit
the access to the menu and the operating keys as required (s. 5.6).
The setting is indicated in the 1st line of the main menu.
The device designation in the header line (see 10.1) can be as
easily programmed as the menu titles of the user menus (see 6.6).
▲
▼
▲
= PROG
P
16 ALMEMO®2590-9
Display and Keypad
PROG F1 F2 F3 F4 ESC
* ALMEMO 2590-9 *
Locked: M0T0 ----
M StandardDispl
9 S1 DataLogger
8 S2 LineChart
7 S3 MultiChannDispl
6 MeasPointList
5 Memory
4 Times, Cycles
3 SensorProgramming
2 ..SpecialFunctions
1 DeviceConfiguration
1 OutputModules
StandardDisplay
*ON S/U F▲F▼

5.2 Function Keys
The function of the keys F1 to F4 can be
different in the various menus. It is
indicated by abbreviations in the bottom
line of the display (soft keys). In the
manual the soft key abbreviations are set
in angle brackets, e.g. <START>.
Next to the meas. value, control symbols
for the meas.value are displayed (s. below).
The following keys are available in the
standard display:
Selection of measuring points F1 <M▲>
Output of menu functions via the interface F2 <PRINT>
Starting a cyclic measurement F3 <START>
Stopping a cyclic measurement F3 <STOP>
Single manual output/storage of all measured values F4 <MANU>
Returning back to the main menu ESC
5.3 Control Symbols
Symbols for monitoring process control and battery in the status line:
Continuous measuring point scan: C
Measurement stopped or started: "or !
Measuring point scan started including storing: REC
Measuring point scan started incl. output via interface: COM
Start/end time of measurement is programmed: |> or >|
Relay status (external output module) off or on: R-- or R01
Display illumination switched on: #
Batt. charge state:100% charged,discharged (connect charger):, flashes
Charger connected:
Symbols for checking the measured value (see above)
No sensor, measuring point deactivated: ´-----´
Measured value altered by sensor correction or scaling: !
Averaging in progress: M¯
Output function altered (see 9.10.5): D, H, L, M, A
Exceeding of limit value Max or Min: ▲or ▼flashes
Exceeding of measuring range: display of max. value O flashes
Undershooting of meas. range: display of min. value Uflashes
Sensor breakage sensor voltage Lo : display ´-.-.-´Bflashes Lflashes
Supply voltage too low for measurement: display switched off
ALMEMO®2590-9 17
C!REC COM |> >| R01 "
01:Temperature °C
-1254.5
Max Value: 245.7°C
Min Value: 224.1°C
PrintTimer: 00:00:13nU
MemoryFree: 0211.0kB
Display and Keypad
M¯ H !
▲
F1 F2 F3 F4
M▲PRINT START MANU

5.4 Function Selection
Each menu consists of a number of
functions that, possibly, have to be used
or programmed during operation.
Selection of the functions. First changeable parameter is PROG
highlighted as inverse coloured font on a black bar. Temperature
Switching to the next function F4 <F▼> or F3<F▲>
Depending on the function, the keys F1 or F2 provide
the corresponding functions, e.g. Clear Function F1 <CLR>
Set meas. value to zero, calibrate meas. value F1 <ZERO>, F2<ADJ>
Memory data output F2 <PRINT>
Clear memory PROG, F1 <CMEM>
It is also possible to select the function by using the operating dial - first
press (P!), then turn (▼▲) to select (see 5.5).
5.5 Data Entry
If a programmable parameter is selected (see 5.4) you can enter or clear the
value.
Starting from a measurement menu, the device firstly switches to the
corresponding programming menu where the parameter can be
programmed.
For example:
If the print timer is selected in the standard menu, PrintTimer: S
00:00:00
for entering the print cycle press: PROG
The menu ´* Times-Cycles *´ indicates PrintCycle: 00:00:00
Programming using the keys
For programming, press the key PROG
Then you are in the input mode,
the cursor flashes below the first cursor position PrintCycle: 00:00:00
18 ALMEMO®2590-9
Display and Keypad
C!REC COM |> >| R01 #
01:Temperatur °C
1254.5
Max Value: 245.7°C
Min Value: ▼224.1°C
PrintTimer: 00:00:00nS
MemoryFree: 0211.0kB
Temperature
F▲F▼

The function keys indicate, e.g. the symbols: CLR ▲▼
Increasing the selected number with <▲>...
Decreasing the selected number <▼>...
Changing the sign of numerical values <+/->
Clearing the programmed values <CLR>
Selecting the next position PROG!
the cursor flashes below the second digit PrintCycle: 00:00:00
Switching back to the previous digit press and hold PROG!
Each digit is programmed analogously to the first one <▲>..., PROG!
Quitting the data entry
After setting the last digit confirm with PROG!
Cancelling the programming process ESC
The input of letters, measuring ranges etc. can be carried out accordingly.
Programming using the operating dial
As an alternative to the keys a ´mouse-like´
operating dial (7) is available for data entry.
This method is significantly faster, particularly
regarding the input of letters and measuring ranges.
First press the dial (corresponds to pressing the
key PROG), then select the correct value of the
digit by turning (▲▼) the dial.
To select the next digit, press the dial again,
and repeat as above.
5.6 Locking of the Menus and the Keypad
The data logger ALMEMO®2590-9 allows an extensive programming of the
sensors, the measuring instrument and even of the presentation of functions
within the measurement menus. However, for many measuring tasks it is very
important that constraints cannot be inadvertently changed. On the other hand,
the application must provide corresponding operating options. Therefore,
extensive configuration options for locking are available to protect the
measurement environment:
Graded locking of the menu access
Graded locking of the key functions
Graded locking of the sensor programming, see 9.4
Furthermore, the configuration can be password protected.
▲
▼
▲
= PROG
P!
ALMEMO®2590-9 19
Display and Keypad

Locking of the menu access
The menus are configured in a hierarchical
form and their locking level is indicated at
the first digit. The first line provides the
function ´Locked: MxTx´ for locking of
menus and keys. If the ´M´ is followed by a
number from 1 to 9, the menus starting from
the bottom line up to this level are locked
and cannot be selected, e.g. in case of ´M1´
the menus ´Device Configuration´ and
´Output Modules´ are locked, while ´M9´
indicates that all menus, except the
´Standard Display´, are locked.
Locking of the operating keys
Depending on the menu the keys provide different functions. The following
functions can be locked using the corresponding locking level ´T´.
T Locked Functions Keys
9 Selection of measuring points M▲
8 Data output PRINT, DISP
7 Manual output, storage MANU
6 Start/stop measurement START/STOP
5 Function selection PROG, F▲, F▼
4 Clear measuring data CLR, CLRA
3 Clear memory CMEM
2 Switch on/off of parameters OFF/ON
1 Data input, menu programming PROG,▲,▼,PROG press and
hold
Key operation:
Locking function: Locking: M0T0 ----
Function Locked: Locked: M1T1 ****
Selecting the function ´Locking´: <F▲>
Selecting the parameter ´Menu Locking´: PROG
Selecting the parameter ´Key Locking´: PROG, <F▲>
Selecting the password: PROG, <F▲>, <F▲>
Programming: PROG, <▲>..., PROG (see 5.4)
To also protect the locking configuration it is possible to enter a four-digit
password (see 5.3), for control purposes the display will only indicate ´****´.
The configuration will only be accessible if the same password is entered
again. However, in case of a reinitialisation the whole locking will also be
cleared (see 3.4).
20 ALMEMO®2590-9
Display and Keypad
* ALMEMO 2590-9 *
Locked: M0T0 ----
M StandardDispl
9 S1 DataLogger
8 S2 LineChart
7 S3 MultiChannDispl
6 MeasPointList
5 Memory
4 Times, Cycles
3 SensorProgramming
2 ..SpecialFunctions
1 DeviceConfiguration
1 OutputModules
StandardDisplay
*ON S/U F▲F▼