Almeco ALMEMO V5 5990-2 User manual

Operating Instructions
Data Acquisition System
ALMEMO®5990-2
V1.0
2.12.2002
AHLBORN Mess- und Regelungstechnik GmbH
Eichenfeldstr. 1-3 · D-83607 Holzkirchen
Phone [phone] · Fax [phone]

Operating devices front side
(1) 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 softkeys F1, F2, F3, F4
(2) Control Lamps
START meas. point scan in process
REC Memory record
COM meas. values output
AVG averaging
ALARM limit value exceeding
or sensor breakage
LOCKED locked keys
2 ALMEMO®5990-2
Operating Controls
(3) Control keys
HOTKEY user menu selection
PROG function selection, input
ESC function abort, menu
F1...F4 function keys (soft keys)
(4) ON Switch
Rocker switch on to the right
Lamp ON device on
Lamp PWR Net supply ready
Option Akku: shine at accumulator
cargo load
flash if full of accu.
(5) Rotary knob (▲▼ turn,press)
M▲▼ meas. pt. select.
P, F▲▼ function select.
P, ▲▼, ... data input
(6) Smart-Media-Memorycard
(Option ZB 1904-SC8)
MEM plug-in place for Smart-

Operating devices back
(7) Plug in module Power supply ES 5990-N
d conn. U-DC 11,5..14V DC, for netw. adapter ZB 5090-NA3
Option A: 8.4V DC recharg. batt., recharg. with ZB 5090-NA3
Option U: 10..36V DC electr. isol. with DC/DC converter, 12V, 1A
c A1 V24-interface with cable ZA1909DK, optic-fiber with ZA1909-DKL
RS422-Networking with network distributor ZA 5099-NVB/L
Centronics with cable ZA1936-DK
A2 Networking w. netw. cable ZA1999NK, optic-fiber w. ZA1999NKL
Trigger iputs with cable ZA1000-EK, relay outputs ZA 1000-EGK
b R0 and R1 alarm relay (see 11.2)
a START, ALARM Control lamps
(8) Plug in module Measuring circuit board ES 5590-G2 (for ALMEMO-single connector)
M00 bis M09 10 meas. inputs for analog and digital sensors
M10 bis M39 30 add. chann. f. double sensors and arithm. chann.
A1 analog output with cable ZA 1601-RK, alarm local w. ZA1000EAK
Extension with Passive Selector Switch Boards:
(9) Plug in module Selector Switch Board ES 5590-MF (for ALMEMO-single connector)
Mx0-Mx9 10 meas. inputs for analog and digital sensors
Mx0+10 bis Mx0+39 30 add. chann. f. double sensors and arithm. chann.
A1 analog output with cable ZA 1601-RK
2 alarm outputs with cable ZA 1000-EGK2
1 CODE SWITCH board number 0 to 7 internally on-board
(10)Plug in mod. Selector Switch Board ES5590MU (ALMEMO®-10-fold MU conn. ZA5590MU)
Mx0 bis Mx9 10 meas. inputs for analog sensors
GW max, GW min 2 alarm outputs f. all meas. points of the plug-in module
1 CODE SWITCH board number 0 to 7 internally on-board
ALMEMO®5990-2 3
Operating Controls

Operating Instructions
Data Aquisition System
ALMEMO®5990-2
For reference with the ALMEMO®Manual
Table of Contents Page
OPERATING DEVICES 2
1 INTRODUCTION 7
1.1 Function Range 7
2 INITIAL OPERATION 12
3 POWER SUPPLY 13
3.1 Mains Operation 13
3.2 Accu. Battery Mode, Supply Voltage Monitoring 13
3.3 External Power Supply (Option U) 14
3.4 Switch On/Off, Reinitialisation 14
3.5 Data Buffering 15
4. CONNECTION OF THE TRANSDUCERS 16
4.1 Transducers 16
4.2 Measuring Inputs and Additional Channels 16
5 DISPLAY AND KEYPAD 18
5.1 Display and Menu Selection 18
5.2 Function Keys 19
5.3 Control Symbols 19
5.4 Function Selection 20
5.5 Data Entry 20
5.6 Locking of the Menus and the Keypad 21
6 MEASURING USING THE MEASUREMENT MENUS 23
6.1 Display of a Measuring Point 24
6.1.1 Selecting the Measuring Point 24
6.1.2 Peak Value Memory with Time and Date 24
6.1.3 Output of Menu Functions 25
6.2 Measuring Point Scans and Output 25
6.2.1 Single Output/Storage of all Measuring Points 25
6.2.2 Cyclic Output/Storage of all Measuring Points 25
4 ALMEMO®5990-2
Table of Contents

Page
6.2.3 Print Cycle, Timer, Output Format 26
6.2.4 Displaying Measured Values as a Line Chart 26
6.2.5 Continuous Output/Storage of all Measuring Points 27
6.2.6 Memory Space, Memory Output, Clearing the Memory 27
6.3 Correction of the Measured Value and Compensation 27
6.3.1 Setting the Measured Value to Zero, Zero Point Adjustment 28
6.3.2 Setpoint Entry 29
6.3.3 Temperature Compensation 30
6.3.4 Atmospheric Pressure Compensation 30
6.4 Averaging 31
6.4.1 Attenuation of Meas. Values 31
6.4.2 Averaging Mode 32
6.4.3 Averaging over Manual Single Measurements 32
6.4.4 Averaging over Cyclic Measuring Point Scans 33
6.4.5 Averaging over Time 34
6.4.6 Measurement Time 34
6.4.7 Volume Flow Measurement 35
6.5 Display of Several Measuring Points 36
6.5.1 Menu Multi Channel Display 36
6.5.2 Menu List of Measured Values 37
6.6 Configuration of User Menus 38
6.6.1 Function Printouts 41
6.6.2 Programming via serial Interface 42
7 TIMES AND CYCLES 43
7.1 Time and Date 43
7.2 Print Cycle with Storage Activation, Output Format 43
7.3 Measuring Cycle and Storage Activation 44
7.4 Conversion Rate, Continuous Measuring Point Scan 44
7.5 Time and Date of Start, Time and Date of End 45
8 DATA MEMORY 46
8.1 Memory Extension through Smart Media Card 46
8.2 Data Acquisition 47
8.3 Numbering of Measurements 48
8.4 Memory Display 48
8.5 Memory Output 49
8.6 Sleep Mode 51
ALMEMO®5990-2 5
Table of Contents

Page
9 SENSOR PROGRAMMING 52
9.1 Selecting the Input Channel 52
9.2 Measuring Point Designation 53
9.3 Averaging Mode 53
9.4 Locking of the Sensor Programming 53
9.5 Limit Values 54
9.6 Scaling, Decimal Point Setting 54
9.7 Correction Values 55
9.8 Changing the Dimension 55
9.9 Selecting the Measuring Range 55
9.10 Special Functions 58
9.10.1 Print Cycle Factor 58
9.10.2 Minimum Sensor Supply Voltage 58
9.10.3 Limit Value Responses, Relay Allocation 59
9.10.4 Analog Output Start/End 60
9.10.5 Output Function 60
9.10.6 Reference Channel 1 61
9.10.7 Multiplexer 61
9.10.8 Element Flags 61
10 DEVICE CONFIGURATION 62
10.1 Device Designation 62
10.2 Device Address and Networking 62
10.3 Baud Rate, Data Format 63
10.4 Language 63
10.5 Illumination and Contrast 63
10.6 Atmospheric Pressure 63
10.7 Hysteresis 63
10.8 Operating Parameter 64
11 OUTPUT MODULES 64
11.1 Data Cable 64
11.2 Alarm processing, relays, and relay trigger cable 65
11.3 Analog Output 67
12 TROUBLESHOOTING 68
APPENDIX
Electromagnetic Compatibility 69
Technical Data 70
Product Overview 71
Keyword Index 72
6 ALMEMO®5990-2
Table of Contents

1. INTRODUCTION
The data logger ALMEMO®5990-2 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®5990-2 data logger has max. 90 electrically isolated measuring
inputs with up to 100 measuring channels for more than 65 measuring ranges,
a real time clock and a 500kB memory for approximately 100000 measured
values. Memory cards up to 32MB can be attached. The device can be
operated by means of the LCD graphic display, a softkey keypad and an
control key. 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.
ALMEMO®5990-2 7
Introduction

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 zur Pulse and volum flow measuring 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.
8 ALMEMO®5990-2
Introduction

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 bymeans of a graded locking function.
MEASUREMENT
Of up to 4 meas. channels are available for one 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 rate can be raised to 50 measuring points / second or 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.
ALMEMO®5990-2 9
Introduction

Average Value of a Channel
A manual averaging over a particular period or over single measurements is available
for the selected channel. For the purposes of measuring the volume flow, the channel
diameter or cross-section can be specified.
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®5990-2 all measuring points can be continuously scanned with
the conversion rate (2.5 or 10 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. A Smart Media Memory
10 ALMEMO®5990-2
Introduction

Card can be used as storage device. The programming is 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
Byentering a number, 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 4output 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. 7 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 or Centronics 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 specificallyto 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 package, WIN-Control, are available for
data acquisition of networked devices, graphical presentation and complex data
processing.
ALMEMO®5990-2 11
Introduction

2. INITIAL OPERATION
Sensor connection Connect transducers to the sockets M0 to Mx (8,9), s. 4.
Power supply mains adapter or battery (option A), see 3.1, 3.2
Switch-on with rocker switch (4), so that lamp ON shines s. 3.4
Displaying meas. data Keys
Call up the main menu ´ALMEMO 5990-2´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 data cable, to socket A1 (ES5990-N),
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>
12 ALMEMO®5990-2
Initial Operation
PROG F1 F2 F3 F4 ESC
* ALMEMO 5990-2 *
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
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
StandardDisplay
*ON S/U F▲F▼M▲PRINT START MANU

3. POWER SUPPLY
The following options are available for the power supply of the instrument:
Mains supply unit or battery charger 12V/2A (s. 3.1) ZB 5090-NA3
NiCd batt. pack 7.2V built-in (Option A, s. 3.2) OA 5990-A
galv. getr. DC Voltage Supply (Option U, s. 3.3) OA 5990-U
3.1 Mains Operation
The mains adapter ZB 5090-NA3 to 12VDC, 2A, is used for the power supply
of the measuring instrument. It is connected to the socket U-DC (7d) and is
locked by turning it to the right.
It is also possible to insert the banana plug (with the protective ground connec-
tor for interference suppression) into the adjacent bare socket.
It is only in exceptional cases (e.g. in an industrial environment) that the protec-
tive ground may itself be subject to such high voltage peaks that it is better to
dispense with this connection.
3.2 Accu. battery mode, supply voltage monitoring
With option A, a rechargeable NiCd accumulator battery, 7.2 V with 1.5 Ah, is
installed; at a power draw of approx. 65mA, this gives uninterrupted operation
of around 23 hours. If selector switch boards (approx. 12mA) are installed or
sensors are connected that need additional power (e.g. humidity sensor
FH-A646 2mA, or rotating vanes, approx. 3mA) or the serial interface is active
(4mA), this operating time will be accordingly shorter. If lighting is left switched
on permanently, the operating period will be reduced to approx. 14 hours.
One way of prolonging the operating time is to switch off the display; (see Sec-
tion 8.6). As soon as the battery’s residual capacity drops to around 10 per-
cent, the “ “ symbol appears in the status line of the display. Normally at
this juncture the battery should be recharged using the mains adapter supplied
with the device; further delay may result in critically low discharge and this may
damage the battery. The battery voltage (and thus an estimate of the operat-
ing time left) can be determined using a ´Batt´ measuring channel.
So long as the device is running on battery only, the green indicator lamp PWR
(4) does not light up at all. The battery should be charged using the 12V net-
work adapter ZB-5000-NA3; this can completely recharge an empty battery in
2.5 hours. During this charging time the green lamp lights up continuously to
indicating that charging is in progress.
Please note that during the charging process the build-up of heat in
the device may result in thermocouple measuring operations with in-
ternal cold junction compensation being falsified.
As soon as the battery is fully charged, the green indicator lamp starts blinking
and the device switches over to trickle charge. The mains unit can thus be left
permanently connected to the measuring instrument in float mode.
ALMEMO®5990-2 13
Power Supply

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.
3.3 External Power Supply (Option U)
If the instrument is intended to have an external voltage supply the power
supply plug-in module with option U (OA 5590-U) is required. It has a wide
input voltage range from 10 to 36V DC and an electrical isolation allowing that
the instrument can be operated with 12V or 24V mains supply. The cable ZB
5090-EK with 2 banana plugs (1e) must be used for the connection. However,
the mains adapter ZB 5090-NA3 still allows for operation with mains supply.
3.4 Switch On/Off, Reinitialisation
As soon as a suitable voltage supply has been connected, the green indicator
lamp PWR on the front panel (4) lights up. If an accumulator battery is in-
stalled, this lamp also functions as charge indicator; (see Section 3.2).
The device is switched on by actuating the rocker switch (4); the red “ON” lamp
then lights up indicating that it is ready-to-operate.
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.
14 ALMEMO®5990-2
Power Supply

3.5 Data Buffering
To ensure an uninterruptible power supply (UPS) for the real-time clock and
the memory, a rechargeable lithium battery (3 V) is installed; this ensures that,
in the event of the mains supply being interrupted, the date and time-of-day
and all stored values over several years are saved.
ALMEMO®5990-2 15
Power Supply

4. CONNECTION OF THE TRANSDUCERS
Any ALMEMO®sensors can be connected to the ALMEMO®input sockets Mxx
of the plug-in modules (8) and (9). 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 Circuit Board ES 5590-G2 of the system ALMEMO 5990-1
has 10 input sockets with, at first, the meas. channels M0 to M9 being
allocated to them. However, ALMEMO®sensors can, if required, provide up to
4 channels so that 40 channels are available with 10 input sockets. The
additional channels can be especially used with humidity sensors with 4 meas.
variables (temperature, humidity, dew point, mixture ratio) or used for function
channels. If required, the sensor can also be programmed with several ranges
or different scaling or, depending on the pin assignment, 2 or 3 sensors can be
combined in one connector (e.g. TE/Ntc, mV/V, mA/V etc.).
The additional meas. 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.).
16 ALMEMO®5990-2
Connection of the Transducers
00 01 0502 0603 0704 08 09
10 11 1512 1613 1714 18 19
20 21 2522 2623 2724 28 29
30 31 3532 3633 3734 38 39
Channel 1
Channel 2
Channel 3
Channel 4
M0 M1 M5M2 M6M3 M7M4 M8 M9 A1

The 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 exceed +/-5V (between B,C,D and A
or - respectively).
The cold junction compensation for thermocouple measurement is integrated
in socket M3 of the device.
As an option the system can be fitted with a measuring circuit board
ES5590G3 for the 10-fold sensor connector ZA-5590-MU. There are no addi-
tional channels here.
The measuring circuit boardcan trigger up to 8 passive selector switch boards,
each with 10 photovoltaic relays. However, the total number of meas. channels
is limited to 100 at max. To be able to adapt the number of sensors and
channels to the individual requirements, the number of channels of the meas.
circuit board and the selector switch boards can be independently configured to
10, 20, 30 or 40 (s.man. 6.10.13.1). The numbering of meas. points starts and
continues from the last meas. point of the master board. The selector switch
boards can be coded from 0 to 7 by the on-board code switches. The duration
of a meas. point scan proportionally increases to the number of meas.
channels. Analogue output cables can only be connected to the measuring
circuit board.
1. With the selector switch boards ES 5590-MF (9) for ALMEMO®flat
connector the number of measuring points is increased in steps of 10
electrically isolated ALMEMO®inputs. Limit value relay cables can be
connected to all boards. The plug-in module requires 2 PCB slots in the
housing.
2. The selector switch boards ES 5590-MU (10) also have 10 inputs, which
are guided to a 64-pole socket terminal strip. The connection of the
sensors is performed via a 10-fold plug ZA 5590-MU each having 4
screw-type terminals A, B, C and D, as each single ALMEMO®
connector (see man. 4.1). Double sensors and sensors that require a
power supply or an ALMEMO®connector with logic control (e.g. humidity
sensors, rotating vanes etc.) cannot be connected. Independent from
the configuration of the channel number, 10 channels are only available.
The programming can be individually entered for each sensor, however,
it is stored in a common EEPROM that is located in the connector. Two
limit value relays, separately for Max and Min, are already mounted on
the board and can be connected via the MU connector. The plug-in
modul requires one PCB slot in the housing.
ALMEMO®5990-2 17
Connection of the Transducers

5. DISPLAY AND KEYPAD
5.1 Display and Menu Selection
The display (1) of the measuring instrument ALMEMO 5990-2 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 one can the use the control button (5) on
the right, turning it to the left or to the right and then
pressing it down to confirm.
Specify the desired menu by keeping the HOTKEY
pressed down for a while. HOTKEY long
Return to the desired menu from any menu by pressing the HOTKEY
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).
18 ALMEMO®5990-2
Display and Keypad
* ALMEMO 5990-2 *
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
PROG F1 F2 F3 F4 ESC
HOTKEY
StandardDisplay
*ON S/U F▲F▼
▲
▼
▲
= PROG
P
press =

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 value F4 <MANU>
Returning back to the main menu ESC
5.3 Control Symbols in the display (1) and Control-LEDs (2)
Control of device condition: Status line LEDs
Continuous measuring point scan: C
Measurement stopped or started: or START
Measuring point scan started including storing: REC REC
Measuring point scan started incl. output via interface: COM COM
Start/end time of measurement is programmed: |> or >|
Relay status (external output module) off or on: R-- or R01
Keyboard operation reduced by locking: LOCKED
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 ALARM
Undershooting of meas. range: display of min. value Uflashes ALARM
Sensor breakage: display ´-.-.-´Bflashes ALARM
Supply voltage too low for measurement: display switched off
ALMEMO®5990-2 19
Display and Keypad
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
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
The function keys indicate, e.g. the symbols: CLR ▲▼
20 ALMEMO®5990-2
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
F▲F▼
Temperature