Ahlborn ALMEMO 8590-9 User manual

____________________________
Operating instructions
English
Data acquisition modules
ALMEMO®8590-9 and 8690-9A
V1.6
26.01.2022
www.ahlborn.com

2
1. OPERATING CONTROLS
(1) Code switches
G: Device address 0 to 99
(2) Key ON/OFF, START/STOP
ON ON
START Start meas. operation
STOP Stop meas. operation
OFF OFF, Hold key pressed down
(3) Status LEDs
ON Device is on.
START Meas. operation started
REC Measuring with results saved
COM Measuring with output
ALARM Limit value exceeded
Sensor breakage, LoBat
(4) Measuring inputs M0 to M8
M0 to M8 for all ALMEMO®sensors
M9 to M39 31 additional channels
(5) Output sockets A1, A2
A1 USB Interface (ZA1919DKU)
Interface/optic fib. (ZA1909DK5/L)
RS 422 (ZA 5099-NVL/NVB)
Ethernet (ZA 1945-DK)
Bluetooth (ZA 1709-BTx)
Trigger input (ZA 1000-ET/EK)
Relay outputs (ZA 1000-EGK)
Analog output 1 (ZA 1601-RK)
A2 Network cable (ZA1999-NK5/NKL)
SD card connector (ZA1904SD)
Trigger input (ZA 1000-ET/EK)
Relay outputs (ZA 1000-EGK)
Analog output 2 (ZA 1601-RK)
(6) Ground socket
(7) Connection socket DC 12V
Mains adapter (ZB1212NAx, 12V, min. 1 A)
Cable, electr. isol. (ZB3090UK, 10-30V)
8690-9A only, recharg. battery pack AP :
(8) Connection socket DC-A 12V
Mains adapter (ZB 1212-NAx, 12V, min. 1.5 A)
(9) Status LEDs
DC-A Mains supply present
CHARGE Batteries are being charged

3
2. CONTENTS
1. Operating controls ......................................................................................2
2. Contents .....................................................................................................3
3. General.......................................................................................................4
3.1 Warranty.............................................................................................4
3.2 Scope of delivery ...............................................................................5
3.3 How to deal with rechargeable batteries ...........................................5
3.4 Special notes on use .........................................................................5
4. Introduction.................................................................................................6
4.1 Functions of the ALMEMO®8590-9 and 8690-9A.............................6
4.1.1 Sensor programming .....................................................................7
4.1.2 Measuring operations ....................................................................8
4.1.3 Process control ..............................................................................9
5. Initial commissioning ................................................................................ 11
6. Power supply............................................................................................12
6.1 Mains operation ...............................................................................12
6.2 External DC voltage supply .............................................................12
6.3 Battery operation (8690-9A only).....................................................12
6.4 Sensor supply..................................................................................13
6.5 Switching ON / OFF, ........................................................................13
6.6 Data buffering ..................................................................................13
7. Connecting the transducers......................................................................14
7.1 Transducer.......................................................................................14
7.2 Measuring inputs and additional channels ......................................14
7.3 Potential separation.........................................................................15
8. Operation and configuration.....................................................................16
8.1 Combination key..............................................................................16
8.2 Status LEDs.....................................................................................16
8.3 Device address and networking.......................................................17
8.4 Configuration....................................................................................17
9. Measured data acquisition........................................................................18
9.1 Online measurement with PC..........................................................18

3. General
4
9.2 Offline measurement........................................................................18
9.2.1 Sleep mode..................................................................................19
9.2.2 Device-internal measured value memory (option S) ...................19
9.2.3 Memory connector with Micro SD card........................................20
10. option KL..............................................................................................21
11. Trouble-shooting..................................................................................22
12. Declaration of conformity.....................................................................24
13. Appendix..............................................................................................26
13.1 Technical data..................................................................................26
13.2 Product overview .............................................................................26
13.3 Index ................................................................................................27
Your contact.....................................................................................................28
3. GENERAL
Congratulations on your purchase of this new and innovative ALMEMO®data
acquisition module. Thanks to the patented ALMEMO®connector the device
configures itself automatically and thanks to the supplied AMR-Control software
its operation should be fairly straightforward. The device can, however, be used
with such a wide range of sensors and peripherals and offers many different
special functions. You are advised therefore to properly familiarize yourself with
the way the sensors function and with the device's numerous possibilities and
take the time to carefully read these operating instructions and the appropriate
sections in the ALMEMO®Manual. This is absolutely necessary to avoid oper-
ating and measuring errors and to prevent damage to the device. To help you
find the answers to your questions quickly and easily there is a comprehensive
index at the end both of these instructions and of the Manual.
3.1 Warranty
Each and every device, before leaving our factory, undergoes numerous quality
tests. We provide a guarantee, lasting two years from delivery date, that your
device will function trouble-free. Before you send your device to us, please ob-
serve the advisory notes in Chapter 11. Trouble-shooting In the unlikely event
that the device proves defective and you need to return it please wherever pos-
sible use the original packaging material for dispatch and enclose a clear and
informative description of the fault and of the conditions in which it occurs.
This guarantee will not apply in the following cases :
⚫The customer attempts any form of unauthorized tampering and alteration in-
side the device.

3. General
5
⚫The device is used in environments and conditions for which it is not suited.
⚫The device is used with unsuitable power supply equipment and peripherals.
⚫The device is used for any purpose other than that for which it is intended.
⚫The device is damaged by electrostatic discharge or lightning.
⚫The user fails to observe and respect the operating instructions.
The manufacturer reserves the right to change the product's characteristics in
the light of technical progress or to benefit from the introduction of new compo-
nents.
3.2 Scope of delivery
When you unpack the device check carefully for any signs of transport damage
and that delivery is complete.
Measuring instrument ALMEMO®8590-9 or 8690-9A
Mains adapter
These operating instructions
In the event of transport damage please retain the packaging material and in-
form your supplier immediately.
3.3 How to deal with rechargeable batteries
Usually when the device is delivered the batteries have not yet
been charged. First of all therefore the batteries should be charged
using the mains adapter provided; continue charging until the
CHARGE lamp goes out.
Rechargeable batteries must never be short-circuited or thrown on
the fire.
Rechargeable batteries are special waste and must not be dis-
carded together with normal domestic waste.
3.4 Special notes on use
⚫If the device is brought into the work room from a cold environment there is
a risk that condensation might form on the electronics. In measuring opera-
tions involving thermocouples pronounced temperature changes may cause
substantial measuring errors. You are advised therefore to wait until the de-
vice has adjusted to the ambient temperature before starting to use it.
⚫Before using the mains adapter make sure that the mains voltage is suitable.
⚫Be sure to observe the maximum load capacity of the sensor power supply.
⚫ Sensors with integrated power supply are not electrically isolated from one
another.
⚫Do not run sensor lines in the vicinity of high-voltage power cables.
⚫Before you touch any sensor lines, ensure that all static electricity has been
discharged.

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4. INTRODUCTION
Data acquisition module ALMEMO® 8590-9 is a new member in our family of
unique measuring devices - all equipped with Ahlborn's patented ALMEMO®
connector system. The intelligent ALMEMO®connector offers decisive ad-
vantages when connecting sensors and peripherals because all parameters are
stored in an EEPROM located on the connector itself; repeat programming is
thus no longer necessary.
All sensors and output modules can be connected to all ALMEMO®measuring
instruments in the same way. Programming and functioning are identical for all
units. The following points apply to all devices in the ALMEMO®measuring sys-
tem; these are described in detail in the ALMEMO®Manual which is included in
delivery with each device.
Detailed explanation of the ALMEMO®system (Manual Ch 1)
Overview of the device functions and measuring ranges (Manual Ch 2)
Basic principles, operation, and technical data for all sensors (Manual Ch 3)
Options for connecting your own existing sensors (Manual Ch 4)
All analog and digital output modules (Manual Section 5.1)
Interface modules RS-232, optic fiber, USB, Ethernet (Manual Section 5.2)
The whole ALMEMO®networking system (Manual Section 5.3)
All functions and their operation via the interface (Manual Ch 6)
Complete list of interface commands with all the printouts (Manual Ch 7)
The operating instructions you are now reading cover only those features and
controls that are specific to this device. Many sections therefore also refer to the
more detailed description in the Manual; (see Manual, Section xxx).
4.1 Functions of the ALMEMO®8590-9 and 8690-9A
Data acquisition module ALMEMO®8590-9 is housed in a compact 8 DU case;
it has 9 electrically isolated measuring inputs suitable for all ALMEMO®sen-
sors. The measuring possibilities are virtually unlimited; there are 36 channels
in the sensor connectors and 4 device-internal function channels - with over 70
measuring ranges. Thanks to the real-time clock incorporated as standard and
the external memory connector with a SD card the amount of data you can rec-
ord is virtually endless. A variant is available with an integrated 512-KB
EEPROM memory sufficient for approx. 100,000 measured values. There are
two output sockets which can be used to connect any ALMEMO®output mod-
ules, e.g. analog output, digital interface, memory connector, trigger input, or
alarm contacts. Several devices can be networked by simply connecting them
with network cables. The ALMEMO®8690-9A is housed in a 12 DU case; this
contains the same measured data acquisition unit as the 8590-9. The difference
is that it is is designed for optional mains-independent operation using a re-
chargeable battery pack.

4. Introduction
7
4.1.1 Sensor programming
The measuring channels are programmed, completely and automatically, by the
ALMEMO®connectors. However, the user can easily supplement or modify this
programming via the interface.
Measuring ranges
Appropriate measuring ranges are available for all sensors with a non-linear
characteristic, e.g. 10 thermocouple types, NTC and PT100 probes, infrared
sensors, and flow transducers (rotating vanes, thermoanemometers, Pitot
tubes). For humidity sensors additional function channels are available for cal-
culating humidity variables such as dew point, mixture ratio, vapor pressure, and
enthalpy. Even complex chemical sensors are supported. Measured values from
other sensors can also be acquired using the voltage, current, and resistance
ranges with individual scaling in the connector. Existing sensors can also be
used - so long as the appropriate ALMEMO®connector is connected via its
screw terminals. For digital input signals, frequencies, and pulses, adapter con-
nectors are available with an integrated microcontroller. It is thus possible to
connect virtually any sensor to any ALMEMO®measuring instrument and to
change sensors without the need for any extra settings.
Function channels
Maximum, minimum, average values and differences from certain measuring
points can be programmed as function channels, also internal channels, and
can be processed like normal measuring points. There are also function chan-
nels available for special measuring tasks, e.g. to determine the temperature
coefficient Q/T and wet bulb globe temperature.
Units
The 2-character units display can be adapted for each measuring channel so
that both the display and via interface always indicate the correct units, e.g.
when a transmitter is connected. Conversion between °C (Centigrade) and °F
(Fahrenheit) is performed automatically.
Measured value designation
Each sensor is identified by means of a 10-character alphanumeric name. This
name is entered via the interface and will appear via interface and in the soft-
ware.
Correction of measured values
The measured value on each measuring channel can be corrected both in terms
of zero-point and gain; this means that even sensors usually requiring initial ad-
justment (e.g. expansion, force, pH) can be freely interchanged. Zero-point cor-
rection and, partly at least, gain adjustment can be performed at the touch of a
button.
A new feature is the possibility of user-defined linearization or multi-point cali-
bration.

4. Introduction
8
Scaling
The corrected measured value on each measuring channel can also be further
scaled in terms of zero-point and gain - using the base value and factor. The
decimal point position can be set by means of the exponent function. The scaling
values can be calculated automatically by setting to zero and entering the nom-
inal value.
Limit values and alarm
Per measuring channel two limit values can be set (1 maximum and 1 minimum).
In the event of one of these limit values being exceeded relay output modules
actuate the associated alarm contacts; these can be allocated individually to
specific limit values. Hysteresis is set by default to 10 digits but this can be ad-
justed to any number between 0 and 99. The exceeding of a limit value can also
be used to start or stop measured value recording automatically.
Sensor locking
All sensor data stored in the connector EEPROM can be protected by means of
a graduated locking function against undesired access.
4.1.2 Measuring operations
A total of up to 36 measuring channels are available for 9 transducers; i.e. it is
also possible to evaluate double sensors, individually scaled sensors, and sen-
sors with function channels. All activated measuring points are continuously
scanned at a rate of 10 mops (measuring operations per second).
If there are a lot of measuring points involved the response time can be short-
ened by increasing the measuring rate accordingly. If the selected measuring
point (M0) needs to be smoothed or output at an analog output, it can be as-
signed preferred status; it will then be rescanned with each 2nd cycle (semi-
continuous mode).
Measured values
Measured values are acquired automatically with auto-zero and self-calibration;
however, they can also be corrected and scaled arbitrarily as required. With
most sensors a sensor breakage is detected automatically.
Analog output and scaling
Each measuring point can be scaled, by means of analog start and analog end,
in such a way that the measuring range thus defined covers the full range of the
analog output (2 V, 10 V, or 20 mA). At the analog output the device can output
the measured value from any measuring point or a programmed value.
Measuring functions
With some sensors, to achieve optimal measured value acquisition, certain spe-
cial measuring functions are required. Cold junction compensation is provided
for thermocouples; temperature compensation is provided for dynamic pres-
sure, pH, and conductivity probes; and atmospheric pressure compensation is
provided for humidity sensors, dynamic pressure sensors, and O2sensors. On
infrared sensors the parameters for zero-point correction and gain correction

4. Introduction
9
are used as the background temperature and the emissivity factor.
Maximum and minimum values
Each measuring operation acquires and stores the maximum and minimum val-
ues with da
Measured value smoothing
Measured values of an unstable or strongly fluctuating nature can be smoothed
by taking a sliding average over a number of values programmable from 2 to
99.
Average value
Manual averaging is available per channel over a certain period or cycle or over
a series of individual measurements.
4.1.3 Process control
To record the measured values from all connected sensors in digital form meas-
uring point scanning is performed continuously with measured value output ac-
cording to a time-based process control. This may be per output cycle or, if really
rapid results are required, at the measuring rate itself. The measuring operation
can be started and stopped by means of a key, the interface, an external trigger
signal, the real-time clock, or by a specified limit value being exceeded.
Date and time-of-day
All measuring operations can be accurately logged using the real-time clock with
date function or in terms of the pure measuring time. For the purposes of starting
/ stopping a measuring operation, the start / stop date and time-of-day and / or
the actual measuring duration can be programmed.
Cycle
The cycle can be programmed to any value between 00:00:01 (1 second) and
24 h. This function permits cyclic output of measured values to the interfaces or
to the memory and provides cyclic calculation of the average value.
Print cycle factor
The print cycle factor can be used to limit data output from particular channels;
this may be necessary in order to reduce excessive data flow especially while
data is being saved.
Averaging over measuring point scans
The measured values from measuring point scans can be averaged either over
the whole measuring duration or over the specified cycle. Function channels are
available for the cyclic output and storage of these average values.
Measuring rate
The available measuring rates are 2.5, 10, 50 or 10 measuring operations per
second. Recording can be accelerated if all measured values are stored to
memory and / or output to the interface at the full measuring rate.
Measured value memory
To save measured values there are two alternative methods. Option S is a 512-

4. Introduction
10
KB non-volatile EEPROM, sufficient for up to 100,000 measured values. This
memory can be organized and configured in linear or ring form. Output is via the
interface. Selection can be specified according to a time interval or number.
New : Or alternatively, without option S, an external memory connector with
micro SD card can simply be connected at socket A2. This solution, depending
on the size of the card, offers a virtually limitless memory capacity. With an ex-
ternal memory connector, available as an accessory, files can be read out very
quickly via any standard card reader.
Numbering of measuring operations
By entering a number single scans or entire series of measuring operations can
be identified and selectively read out from the memory.
Control outputs
Via the keypad and interface 4 analog outputs (ZA8006-RTA3) and up to four
output relays can be individually addressed.
Output
All data logs, all saved measured values, and all programming parameters can
be output to any peripheral equipment. RS232, RS422, USB, and Ethernet in-
terfaces are available via the appropriate interface cables. Wireless communi-
cation is also possible via Bluetooth. Measured data can be output in list, col-
umn, or table format. Files in table format can be processed directly using any
standard spreadsheet software. The print header can be programmed specifi-
cally for the company or your application.
Networking
All ALMEMO®devices can be addressed and can be easily networked by
simply linking them together via network cable or for longer distances via RS-
422 network distributors.
Software
Each ALMEMO®Manual is accompanied by the AMR-Control software pack-
age, which can be used to configure the measuring instrument, to program the
sensors, and to read out from the measured value memory. Using the integrated
terminal, measuring operations can also be performed online. The WINDOWS®
software package WIN-Control is provided for the purposes of measured value
acquisition via networked devices, for graphical presentation, and for more com-
plex data processing.

11
5. INITIAL COMMISSIONING
1. Sensor connection : Plug in sensor at sockets M0 to M8 (4); see Ch 7.
2. Power supply : Connect mains adapter at socket DC (7); see Section 6.1.
3. Switching on : Press the ON key (2); see Section 6.5-
4. Device configuration by PC via the interface :
Connect computer via interface cable to socket A1; see Manual 5.2.
Activate the software, e.g. the supplied AMR-Control.
Identify the device by means of <Search network>.
If the device is not found select <Setup interface>.
Set the appropriate COM interface and baud rate to 9600 baud; Man 6.1.1.
<Update list>
<Program device>
Input "cycle" for automatic measuring point scan; see Manual 6.5.2.
Activate "With memory" to save (only with option S or memory connector).
If necessary "Accept date and time-of-day from PC"; see Manual 6.2.8.
Program the output format; see Manual 6.5.5 and 6.6.1.
"Table" for MS-Excel / "List" or "Columns" for text editor
5. Measured data acquisition from PC without saving in device :
Activate <File - terminal>; see Manual 6.1.3.
<Open file - terminal - log>, enter file name, "Save"
Start measuring operation by actuating the "Start" button or pressing the
START/ STOP key; see Manual 6.6.
Stop measuring operation by actuating the "Stop" button or pressing the
START/ STOP key.
<Close file - terminal log>
Activate file e.g. from MS-Excel and import using ";" as separator; Man. 6.1.4.
6. Saving measured values in the device (only with option S or memory connector)
Activate <Measured value memory>.
If necessary "Clear memory" "Execute"; see Manual 6.9.3.
For long-term recording (cycle > 2 minutes)Activate sleep mode; see Section
9.2.1.
"Start saving to memory" immediately or
start measuring operation on site by pressing the START/ STOP key.
or in <Program device> enter measuring operation "Start date / time"´and
´End date / time"; see Manual 6.6.2.
At the end of the measuring operation stop recording again by pressing the
START/ STOP key.
Transferring data from memory to the computer
If you are using a memory connector remove the micro SD card and transfer
via a USB reader to the PC (see Manual 6.9.4.2) or
reconnect the computer via the interface cable at socket A1; see above.
In AMR-Control activate <Measured value memory>.
Click on "Read out complete memory".

6. Power supply
12
Set "Format"; see above.
Read out "Execute", enter file name, "Save"; see Manual 6.9.3.
Activate file e.g. from MS-Excel and import using ";" as separator; s. Man 6.1.4.
6. POWER SUPPLY
Power can be supplied to the instrument in any of the following ways :
Mains adapter 12V / min. 1 A (ALMEMO 8590-9) ZB 1212-NAx
Mains adapter 12V / min. 1.5 A (ALMEMO 8690-9A) ZB 1212-NAx
Rechargeable batteries NiMH 9.6V / 1600mAh (ALMEMO 8690-9A only) MA 8690-9A
Electrically isolated power supply cable, 10 to 30 VDC, 0.25 A (ZB 3090-UK)
Electrically isolated power supply cable, 10 to 30 VDC, 1.25 A (ZB 3090-UK2)
See product overview, Annex 14 and the following chapters.
6.1 Mains operation
To power these devices from the mains preferably use the mains adapter pro-
vided (for type see above); connect it to the socket DC (7). Please ensure the
mains voltage is correct !
6.2 External DC voltage supply
The DC socket (7) can also be used to connect another DC voltage, 9 to 13 V
(minimum 200 mA). For this connection use a cable with 2 banana plugs (ZB
5090-EK). If, however, the power supply has to be electrically isolated from the
transducers or if a larger input voltage range (10 to 30 V) is required, then an
electrically isolated supply cable must be used, either the ZB 3090-UK or, for
the ALMEMO® 8690-9A because of the battery charging current at socket DC-
A, the ZB 3090-UK2 (1.25 A). It will then be possible to use the measuring in-
strument in a 12-volt or 24-volt on-board supply system.
6.3 Battery operation (8690-9A only)
To permit mains-independent operation the ALMEMO®8690-9A has a larger
housing containing module AP with eight NiMH rechargeable batteries (9.6 V /
1600 mAh). At a current consumption of approx. 25 mA this will give an operat-
ing time of approx. 60 hours. To prolong the operating time for the purposes of
long-term recording the device can be left in SLEEP mode; (see 9.2.1). When
the remaining capacity of the rechargeable batteries drops to approx. 10%, the
ALARM LED in the display will start flashing; as soon as this happens the batter-
ies must be recharged. If the batteries are completely discharged the device will
switch off to avoid the risk of critically low discharge. The measured data and
time-of-day will, however, be retained; see 6.6. The NiMH rechargeable batter-
ies can in fact be recharged at any time and in any charge status using the

6. Power supply
13
intelligent charge circuitry. To charge the batteries the mains adapter ZB 1212-
NA9 (12 V / 2.5 A) must be connected to socket DC-A on the battery module.
The "CHARGE" lamp should then light up indicating that the batteries are being
recharged. After approx. 2.5 hours the batteries should be fully recharged and
the lamp switches off; the charge circuitry has switched over to trickle charge.
The mains adapter can thus be left permanently connected to the measuring
instrument in buffer mode without risk of overcharging the batteries. If you prefer
not to recharge the batteries at the moment, e.g. to prevent the device from
warming up during thermocouple measurement, you can connect the mains unit
to the DC socket (7).
6.4 Sensor supply
At the terminals + (plus) and –(minus) in the ALMEMO®connector there is, for
mains operation, a sensor supply voltage, 12 V, 400 mA, available (self-healing
fuse, 500 mA). During battery operation the battery voltage is available, 9 to 11.5
V. Other voltages (12, 15, or 24 V or references for a potentiometer and strain
gauge) can be obtained using special connectors; (see Manual 4.2.5 and 4.2.6).
6.5 Switching ON / OFF,
To switch the device ON / OFF the ON - OFF key (2) must be pressed.
To switch OFF press the ON - OFF key and hold down for approx. 1 second. After
the device is switched off the real-time clock continues to run and all saved val-
ues and settings are retained intact; (see 6.6).
If the device behaves abnormally as the result of interference (e.g. electrostatic
or mains failure), you are advised to try clearing the problem first of all by simply
reinitializing, i.e. switching off and then on again.
If this does not help then you are advised to restore all device programming to
the factory default settings. The device can be reset by setting the code switch
G(1), before switching on, to address 99. This has the effect of also resetting
the baud rate setting on the data cable to 9600 baud. However, the programming
of the sensors in the ALMEMO®connectors always remains intact.
6.6 Data buffering
The sensor's programming is stored in the EEPROM on the sensor connector
and the device's calibration and programmed parameters are stored in the
EEPROM on the instrument itself, both on a fail-safe basis. The memory data is
also saved in non-volatile EEPROMs. The date and time-of-day are buffered by
a dedicated lithium battery; this data is retained intact for years - even when the
device is switched off and without batteries.

14
7. CONNECTING THE TRANSDUCERS
Virtually any ALMEMO®sensor can be connected to any of the ALMEMO®in-
put sockets M0 to M8 on the measuring instrument (4). To connect your own
existing sensors you simply need the appropriate ALMEMO®connector.
7.1 Transducer
The ALMEMO®Manual includes detailed descriptions of the comprehensive
ALMEMO®range of sensors (see Manual Ch 3) and instructions for connecting
your own existing sensors to ALMEMO®instruments (see Manual Ch 4). All
standard sensors with an ALMEMO®connector usually have the measuring
range and units already programmed and can thus be connected to any input
socket without further adjustment. A mechanical coding system ensures that
sensors and output modules can only be connected to the correct sockets. All
ALMEMO®connectors incorporate two snap-lock levers; these snap into posi-
tion as soon as the connector is inserted into the socket, thus preventing unin-
tended disconnection if the cable is accidentally pulled. To withdraw the con-
nector, both these levers must be pressed in at the sides.
7.2 Measuring inputs and additional channels
Measuring instrument ALMEMO®8590-9 has 9 input sockets (4) to which ini-
tially measuring channels M0 to M8 are allocated. However, ALMEMO®sensors
can, if required, provide up to 4 channels with 9 input sockets each so that alto-
gether 36 channels are available. The additional channels can be used in par-
ticular for humidity sensors with four measuring variables (temperature / humid-
ity / dew point / mixture ratio) or for function channels. Each sensor can if nec-
essary be programmed with several measuring ranges or scaling settings; and
two or three sensors, if pin assignment so permits, can be combined in a single
connector (e.g. rH / NTC, mV / V, mA/ V, etc.). The additional measuring channel
numbers per connector go up in steps of 10 (e.g. the first sensor has channels
M0, M10, M20, M30, the second sensor has channels M1, M11, M21, M31 etc.).
Device-internal channels
Afurther innovation on this device is its four additional device-internal channels.
The first of these M9 is programmed by default as differential channel M1 –M0.
This only applies, however, if there are two sensors with the same units and
same decimal point position connected at measuring points M0 and M1. How-
ever, all four channels can be programmed with any other function channels
(e.g. U-Bat, cold junction compensation, average, volume flow, etc.); (see Man-
ual 6.3.4). The reference channels used are by default Mb1 = M1 and Mb2 =
M0.
The advantage of device-internal channels is that when using several sensors
for the same application these sensors do not have to be reprogrammed and

7. Connecting the transducers
15
can be exchanged without losing the function channels. However, if the whole
application operates with just one sensor, then programming on the sensor itself
makes more sense.
On the measuring instrument this gives the following channel assignment :
7.3 Potential separation
When organizing a properly functioning measuring setup it is very important to
ensure that no equalizing current can flow between sensors, power supply, and
peripherals. This will be the case so long as all points lie at the same potential
or unequal potentials are electrically isolated.
The 9 analog inputs are electrically isolated from one another by means photo-
voltaic relays. A new feature on this device is the additional separation of the
measuring inputs from CPU and power supply. Between all inputs and outputs
(even the analog output cables which are not electrically isolated) the maximum
potential difference permitted is 50 V. The voltage at the measuring inputs them-
selves must not exceed 12 V (between B, C, D, and A).
However, some components are not electrically isolated,namely all sensors
connected to the same common internal power supply ±U or combined sensors
within one connector. For these sensors the electrical isolation usually has to be
disabled by means of relay S (see above) or by wire jumper; some inputs would
otherwise be left without reference potential. The relay is set automatically by

8. Operation and configuration
16
element flag 5 ´ISO OFF´ the first time it is connected; (see Manual 6.10.3). How-
ever, with certain connectors (especially divider connectors without power sup-
ply) element flag 5 should be checked and if necessary corrected. These sen-
sors must themselves be isolated or the device must be operated with an elec-
trically isolated power supply (mains adapter or connecting cable ZA2690-UK with
DC/DC converter).
Data and trigger cables are also isolated by means of optocouplers.
8. OPERATION AND CONFIGURATION
Data acquisition module ALMEMO®8590-9 has only a few operating controls; it
is operated mainly via a PC.
8.1 Combination key
The first function of the one and only key ON/OFF - START/STOP (2) has already
been described in Section 6.5.
Press to switch ON and press and hold down to switch OFF again.
If the device is on and a cycle has been programmed the same key can be used
to start and stop a measuring operation.
The current operating status is clearly shown by the status LEDs.
8.2 Status LEDs
The following status LEDs (3) report the current device status :
ON Device is on.
ON flashes once briefly Device is in sleep mode.
START Measuring operation is started.
COM continuous Measured value transmission to the PC - cyclic
COM flashes Measured value transmission to the PC - at the conversion rate
REC continuous Data saving on the device - cyclic
Also lights up during memory output
REC flashes Data saving on the device - at the conversion rate
START flashes once briefly Once-only measuring point scan from PC
COM flashes once briefly Once-only measuring point scan transfers data to PC
REC flashes once briefly Once-only meas. point scan saves data on the device
ALARM Limit value exceeded or sensor breakage
ALARM flashes once briefly Device supply voltage too low

8. Operation and configuration
17
8.3 Device address and networking
ALMEMO®8590-9 data loggers, like all ALMEMO® devices, can also be net-
worked. To communicate with networked devices it is absolutely indispensable
that each device should have its own dedicated address; this is because only
one device should respond per command. Before each network operation there-
fore all measuring instruments must be set, by means of their code switches (1),
to different device numbers.
Example: Module address 01 0 1
In network operation consecutive numbers between 01 and 99 should
be used; this ensures that device 00 is not addressed unnecessarily
in the event of interruption to the power supply.
8.4 Configuration
For the purposes of programming and configuration the supplied AMR-Control
software is ideally suited. This can be used to modify the programming of the
sensors and to configure the process control. The various possibilities are ex-
plained in detail in the Manual Ch 6. This Chapter also describes how all func-
tions can be programmed via a terminal by means of ASCII commands.


18
9. MEASURED DATA ACQUISITION
Measured data acquisition can be performed in basically two ways :
1. Perform measurement online and transfer data to the PC immediately (no
device-internal memory required).
2. Perform measurement offline, i.e. the data is first saved to the device memory
(option S) or to an external memory connector with micro SD card and then
transferred to the PC later.
9.1 Online measurement with PC
For conveniently recording measured data on the PC the measured data acqui-
sition software Win-Control is ideally suited. This software is unique in that it can
scan one stand-alone or several internetworked measuring modules at its own
measuring cycle, then save the measured data on the PC, and output it online
in a clearly understandable form as a line diagram, table, or list; thus for process
control purposes you need simply to program the measuring cycle in Win-Con-
trol. There are numerous other possibilities using formula channels, control and
regulation functions, alarm reports via SMS and e-mail, etc. but it would be going
too far to describe all these here in detail.
9.2 Offline measurement
To perform offline measuring operations, i.e. data logging in the device itself,
you need either option S with a 500-KB EEPROM in the device or an external
memory connector with a micro SD card (ZA 1904-MMC); in either case the
following parameters must be configured.
1. Date, time-of-day
2. Cycle with saving to memory activated
3. Sleep mode, possibly
The easiest way to do this is by means of the AMR-Control software, in menu
<Program device> and <Measured value memory - Record to memory>.
To start and stop a measuring operation on site there are numerous methods
available; (see Manual 6.6).
1. Press the START / STOP key (2) on the device.
2. Program the start date and time-of-day and then either the end date and
time-of-day or the measuring duration (see Manual 6.6.2).
3. Reaction to overshooting / undershooting a limit value (see Manual 6.6.3).
4. Triggering in response to electrical signals (see Manual 6.6.4).
The status of a measuring operation and of data recording can easily be traced
by watching the LEDs (see 8.2).
To read out the measured data (see Manual 6.9.3) select AMR-Control menu
item <Devices - Data memory>. Here you can transfer to a file on the PC either
the complete memory or parts of it selected according to date and time-of-day
or by number; the device memory can then be cleared.

9. Measured data acquisition
19
9.2.1 Sleep mode
For long-term monitoring involving large measuring cycles where power is sup-
plied by rechargeable or normal battery the measuring instrument can also be
operated in sleep mode. In energy-saving sleep mode the measuring instrument
switches off after each measuring point scan and switches on again automati-
cally after the cycle expires ready for the next measuring point scan. In this way
with just one battery recharge up to 30000 measuring point scans can be per-
formed; for a cycle lasting 5 minutes this represents a measuring capability of
over 100 days.
For data recording in sleep mode go to AMR-Control <Device programming>
and take the following steps :
1. Enter a cycle lasting at least two minutes.
2. Activate saving to memory in the cycle.
3. Activate sleep mode.
4. Start measuring operation as normal; the device should then switch off; as
a check the LED ON (3) should flash rhythmically on and off.
6. In the specified cycle the instrument switches on automatically, performs
one measuring point scan, and then switches off again.
7. The measuring operation can be stopped by twice pressing key (2e), Func-
tion ´ON´ and ´STOP´.
In this way any number of measuring operations can be performed in sleep
mode up until when sleep mode is deactivated again. With cycles shorter than
2 minutes measuring operations are performed automatically in normal mode.
9.2.2 Device-internal measured value memory (op-
tion S)
With option S data acquisition module ALMEMO®8590-9 incorporates a
memory with a 512-KB EEPROM, sufficient for 64000 to 100000 measured val-
ues (depending on the number of channels). This memory is non-volatile; i.e. it
retains data intact even in the event of a failure affecting the lithium battery used
to buffer the real-time clock. How this measured value memory is organized and
how data is recorded to it and output from it are described in the Manual, Section
6.9. It can be configured either as linear memory or ring memory; (see Manual
6.10.13.2).
As on all other ALMEMO®data loggers the internal memory supports the follow-
ing functions :
However, only one connector configuration is possible.
Recording to ring memory
Sleep mode
Data output in any normal format
Selective data output according to date and time
Selective data output by number

9. Measured data acquisition
20
9.2.3 Memory connector with Micro SD card
Another convenient feature for data recording without option S is provided by
the newly developed memory connector (ZA 1904-SD) with a conventional SD
memory card. The memory card is written to it via the memory connector in table
mode and in standard FAT16 format. The SD card can be formatted and its
contents can be read and deleted via any normal PC using any card reader; see
Manual 6.9.4.2. Measured data can be imported into MS-Excel or into Win-Con-
trol (the accompanying measured value software). The memory connector
works in a completely different way to the device-internal memory; this brings
both restrictions and advantages.
Functions of the SD memory connector :
Virtually unlimited memory capacity
With each new sensor configuration a new file is created.
No ring memory recording
Sleep mode
Data can be evaluated using any reader on site and elsewhere.
Very high-speed data transfer via the reader
Data recording and output in table format only
Via the ALMEMO®device itself only the last file can be read.
No selective data output according to date and time or by number
The memory connector with the additional memory card can be connected at
socket A2; it is recognized automatically. If the external memory is connected at
the start of any measuring operation, it will be used. However, in the course of
the measuring operation it must not be unplugged; this would cause temporarily
buffered measured values to be lost.
Before starting any measuring operation you can enter an 8-character file name
(see Ch 11). In the absence of a user-assigned file name, the default name
´ALMEMO.001´ or the name most recently used will be suggested automatically.
So long as the connector configuration is not altered, you can save several
measuring operations, either manually or cyclically, also with numerical assign-
ment, all in the same file.
If, however, the connector configuration has been changed since the last
measuring operation and if nonew file name has been programmed, then a new
file is always created and in so doing the index in the file name extension is
automatically incremented by 1, e.g. ´ALMEMO.002´. Similarly, if the file name en-
tered already exists, then a new file will be created with the same file name
prefix but with a new index.