Ahlborn ALMEMO 2890-9 User manual

____________________________
Operating Instructions
Data Logger
ALMEMO® 2890-9
V3.5
11.09.2015
www.ahlborn.com

1. Operating Controls
1. OPERATI G CO TROLS
(1) O / OFF switch
Up O - ON
Down OFF - OFF
(2) Meas. inputs M0 to M8
M0 ... M8 or all ALMEMO-Sensors
M10...M38 31 additional channels
(3) Output sockets A1, A2
A1Inter ace/optic iber(ZA1909-DK5/L)
RS 422 (ZA 5099-NVL/NVB)
Ethernet (ZA 1945-DK)
Bluetooth (ZA 1709-BTx)
Analog output 1 (ZA 1601-RK)
A2Network cable (ZA1999-NK5/NKL)
SD c rd connector (ZA1904-SD)
Trigger input (ZA 1000-ET/EK)
Relay outputs (ZA 1000-EGK)
Analog output 2 (ZA 1601-RK)
(4) Check lamps
SLEEP SLEEP mode
Charge Batteryrecharge
(5) Socket DC 12volts
M ins d pter(ZB1112NA10, 12Vvolts, 2 A)
Charging adapter (ZA 2690-LA, 12V)
DC-Cable isolat. (ZB 2590-UK, 10-30V)
(6) LCD
Status line:
CCont. measuring point scan
© , ll Measurement Start, Stop
REC Memory record
COM Output o meas. values
l©, ©l Meas. start, end programmed
R01 Alarm relay status
* , * Light on, pause
Battery operation/charge status
13 lines for functions
Function of keys F1, F2, F3, F4
(7) Thumb-wheel
M▲▼ Measuring point
P►, F▲▼ Function selection
P►, ▲▼, ► Data input
2 ALMEMO® 2890-9
(8) Operating keys
 ,  ,  Function selection, input
F1 ... F4 Function keys (soft keys)
PROG Programming
 Last measuring menu
Rear o device
(9) Rechargeable battery pack
6 AA NiMH rechargeable
batteries, 7.2 volts
(10) Folding stand / hook

Table o Contents
2. TABLE OF CO TE TS
1. OPERATI G CO TROLS..........................................................................2
3. GE ERAL...................................................................................................6
3.1 Guarantee............................................................................................6
3.2 Extent of the Delivery .........................................................................7
3.3 Waste disposal....................................................................................7
4. SAFETY I STRUCTIO S..........................................................................8
4.1 Special notes on use...........................................................................9
4.2 Handling batteries / rechargeable batteries correctly......................9
5. I TRODUCTIO ....................................................................................... 10
5.1 Function Range of the ALMEMO 2890-8..........................................10
5.1.1 Sensor Programming.................................................................11
5.1.2 Measurement.............................................................................12
5.1.3 Process low control...................................................................13
6. I ITIAL OPERATIO ................................................................................15
7. POWER SUPPLY.....................................................................................16
7.1 Rechargeable battery operation
and supply voltage monitoring........................................................16
7.2 Mains Operation................................................................................16
7.3 External DC Voltage Supply.............................................................17
7.4 Sensor Supply...................................................................................17
7.5 Switch On/Off, Reinitialisation.........................................................17
7.6 Data buffering....................................................................................17
8. CO ECTIO OF THE TRA SDUCERS................................................18
8.1 Transducers.......................................................................................18
8.2 Measuring inputs and Additional Channels....................................18
8.3 Isolation............................................................................................. 19
9. DISPLAY A D KEYPAD..........................................................................20
9.1 Display and Menu Selection.............................................................20
9.2 Function Keys ...................................................................................21
9.3 Control Symbols................................................................................21
9.4 Function Selection............................................................................22
9.5 Data Entry.......................................................................................... 22
10. MEASURI G USI G MEASURI G-ME US...........................................23
10.1 Measuring with one Measuring Point............................................24
10.1.1 Selecting the Measuring Point..................................................24
10.1.2 Peak Value Memory with Time and Date..................................24
10.2 Correction of the Meas. Value and Compensation ......................25
10.2.1 Setting the Meas. Value to Zero...............................................25
10.2.2 Zero Point Adjustment .............................................................26
ALMEMO® 2890-9 3

2. Table o Contents
10.2.3 Sensor Adjustment in the case o chemical sensors................26
10.2.4 Two-point Adjustment with Setpoint Entry................................27
10.2.5 Temperature Compensation ....................................................28
10.2.6 Atmospheric Pressure Compensation......................................28
10.2.7 Cold Junction Compensation....................................................29
10.3 Measuring point scans and Output...............................................29
10.3.1 Single Output / Storage o all Measuring Points.......................29
10.3.2 Cyclic Output / Storage o all Measuring Points........................30
10.3.3 Memory space, Memory Output, Clearing the Memory............30
10.3.4 Output o Menu Functions........................................................31
10.3.5 Displaying Measured Values as a Line Diagram .....................31
10.4 Averaging.........................................................................................32
10.4.1 Damping o Meas. values by a Sliding averag. window............33
10.4.2 Averaging Mode.......................................................................34
10.4.3 Averaging over Manual Single Measurements.........................34
10.4.4 Array Measurement..................................................................35
10.4.5 Averaging over the Measuring Time, Meas. duration...............35
10.4.6 Measurement Time, Measuring duration, Timer.......................36
10.4.7 Averaging over the Cycle..........................................................36
10.4.8 Averaging over several Measuring Points................................37
10.4.9 Volume Flow Measurement......................................................38
10.5 Display of Several Measuring Points ............................................39
10.5.1 Menu Multi Channel Display and Bar chart...............................39
10.5.2 Di erential Measurement.........................................................40
10.5.3 Menu List o Measuring Points.................................................40
10.6 Assistant-Menus for Special Meas. Operations............................41
10.6.1 Thermal Coe icient..................................................................41
10.6.2 Wet Bulb Globe Temperature...................................................42
10.7 User Menus......................................................................................42
10.7.1 Functions..................................................................................43
10.7.2 Con iguration o the menus .....................................................44
10.7.3 Function Printouts....................................................................45
11. PROGRAMMI G WITH PROGRAMMI G-ME US.................................46
11.1 Times and Cycles............................................................................46
11.1.1 Time and Date .........................................................................46
11.1.2 Cycle with Storage Activation and Output Format....................46
11.1.3 Conversion Rate, Continuous Measuring Point Scan...............47
11.1.4 Start date and time-o -day, end date and time-o -day,
measuring duration ..................................................................48
11.2 Data Memory for measured values................................................49
11.2.1 Memory connector with SD card ..............................................49
11.2.2 Data Acquisition.......................................................................50
11.2.3 Numbering o measurements...................................................51
11.2.4 Starting and Stopping o measurements..................................51
4 ALMEMO® 2890-9

Table o Contents
11.2.5 Scanning mode........................................................................51
11.2.6 Memory Output.........................................................................53
11.3 Sensor Programming......................................................................54
11.3.1 Selecting the Input Channel......................................................54
11.3.2 Measuring Point Designation....................................................55
11.3.3 Averaging Mode.......................................................................55
11.3.4 Locking the Programming o the Sensor..................................55
11.3.5 Limit Values..............................................................................56
11.3.6 Scaling, Decimal Point Setting..................................................56
11.3.7 Correction Values.....................................................................57
11.3.8 Changing the Dimension..........................................................57
11.3.9 Selecting the Measuring Range................................................57
11.3.10 Function Channels .................................................................60
11.3.11 Special meas. ranges, linearization, multi-point calibration.....61
11.4 Special Functions............................................................................62
11.4.1 Print Cycle Factor.....................................................................62
11.4.2 Minimum Sensor Supply Voltage..............................................62
11.4.3 Limit Value Responses.............................................................63
11.4.4 Analog Output Start and End....................................................64
11.4.5 Output Function........................................................................64
11.4.6 Re erence Channel 1................................................................65
11.4.7 Re erence Channel 2 or Multiplexer.........................................65
11.4.8 Element Flags..........................................................................65
11.5 Device Configuration......................................................................66
11.5.1 Device Designation...................................................................66
11.5.2 Device Address and Networking...............................................66
11.5.3 Baud Rate, Data Format...........................................................67
11.5.4 Language.................................................................................67
11.5.5 Lighting and Contrast...............................................................67
11.5.6 Atmospheric Pressure..............................................................67
11.5.7 Hysteresis.................................................................................68
11.5.8 Operating Parameters..............................................................68
11.6 Output Modules...............................................................................68
11.6.1 Data cable................................................................................69
11.6.2 Relais trigger modules..............................................................69
11.6.3 Analog Output..........................................................................71
11.7 Menu Power Supply........................................................................72
11.8 The locking and calibration menu (option KL) ............................73
12. TROUBLESHOOTI G..............................................................................74
13. DECLARATIO OF CO FORMITY.........................................................75
14. APPE DIX................................................................................................ 76
14.1 Technical Data ................................................................................76
14.2 Product overview ...........................................................................77
ALMEMO® 2890-9 5

2. Table o Contents
14.3 Keyword index.................................................................................78
14.4 Your contact....................................................................................82
3. GE ERAL
Congratulations or buying this innovative ALMEMO® data logger. By means o
the patented ALMEMO® connectors the device con igures itsel and with the
help o menus and help windows the operation should not be too di icult. How-
ever, the device allows the connection o a great variety o sensors and periph-
erals with many special unctions. For getting to know the unction range o the
sensors and the diverse possibilities o the device, you really should read these
operating instructions and the corresponding chapters o the ALMEMO® man-
ual. This is the only way to avoid operating and measuring errors as well as
damages o the device. For a quick answer to all questions, a detailed key-
word index is provided at the end o the instructions and o the manual.
3.1 Guarantee
Every device has to pass through several quality tests be ore leaving the
works. For a per ect unction, a guarantee o two years rom the delivery date
is granted. Be ore sending back the device, please pay attention to the indica-
tions in chapter 12. Troubleshooting. Should there actually be a de ect, please
use the original packing material or depatch i possible and enclose an ex-
pressive description o the trouble in connection with the corresponding circum-
stances.
In the ollowing cases a guarantee bene it is excluded:
A ter orbidden operations and changes in the device by the client
Operating in surrounding conditions that are not valid or this product
Using unsuitable power supply and peripherals
Using the device in a way it is not determined or
Damages through electrostatic discharge or lash o lightning
Not paying attention to the operating instructions
Changes in the product eatures in avour o technical progress or due to new
components are reserved to the producer.
6 ALMEMO® 2890-9

Extent o the Delivery
3.2 Extent of the Delivery
While unwrapping the delivery, pay attention to damages o the device and to
its completeness:
ALMEMO® 2890-9 measuring instrument, with rechargeable battery
pack, olding stand / hook, and mains adapter ,
these operating instructions,
ALMEMO® Manual,
CD with So tware AMR-Control and use ul accessories
In case o a transportation damage, the packing material is to be kept and the
supplier is to be in ormed immediately.
3.3 Waste disposal
The pictogram showing a waste bin crossed through
means that the product is subject to European Union regu-
lations on segregated waste disposal. This applies both to
the product itsel and to any accessories marked with the
same symbol. Disposal o any such item as unsorted do-
mestic waste is strictly orbidden
•Please dispose o all packaging materials according to the applicable national
waste management regulations.
•Please dispose o cardboard boxes, protective plastic packaging materials,
and all preservative substances separately and in the proper manner.
•The disposal o the device itsel (also o device parts, accessories, and con-
sumables) is subject to the applicable national and local waste management
regulations and to the environmental protection legislation in orce in the
country o use.
•Please dispose o all waste in the proper manner;
this applies in particular to all parts and substances that constitute a hazard
or the environment. This includes inter alia plastics, batteries, and recharge-
able battery packs .
•When disposing o goods, please wherever possible use the original packag-
ing materials.
ALMEMO® 2890-9 7

4. Sa ety instructions
4. SAFETY I STRUCTIO S
DA GER Danger to life and limb, risk of damage to equipment
Read the instructions carefully before starting to operate
the device.
Please ensure that you comply with all general safety ad-
vice and the special safety instructions included in other
chapters.
Such risks may occur in the ollowing circumstances :
•Failure to heed the operating instructions and all the
sa ety notes these contain
•Any orm o unauthorized tampering or alteration in-
side the device
•Use o the device in environments or conditions or
which it is not suited
•Use o the device with an unsuitable power supply
and / or in conjunction with unsuitable peripheral
equipment
•Use o the device or any purpose other than that or
which it is intended
•Damage caused by electrostatic discharge or light-
ning.
DA GER Risk of fatal injury caused by dangerously high voltage
Such risks may occur in the ollowing circumstances :
•Use o the device with an unsuitable power supply and
/ or in conjunction with unsuitable peripheral equip-
ment
•Damage caused by electrostatic discharge or lightning
•Do not run sensor lines in the vicinity o high-voltage
power cables.
•Be ore you touch any sensor lines, ensure that all
static electricity has been discharged.
DA GER Warning - explosive atmospheres or substances
In the vicinity o various uels or chemicals there is a risk o ex-
plosion.
Do not use the device in the close vicinity o blasting work or ill-
ing stations!
8 ALMEMO® 2890-9

Special notes on use
4.1 Special notes on use
•I the device is brought into the work-room rom a cold environment
there is a risk that condensation might orm on the electronics. In
measuring operations involving thermocouples pronounced changes in
temperature may cause substantial measuring errors. You are ad-
vised there ore to wait until the device has adjusted to the ambient
temperature be ore starting to use it.
•Be ore using the mains adapter make sure that the mains voltage is
suitable.
•Be sure to observe the maximum load capacity o the sensor power
supply.
•Sensors with their own integrated power supply are not electrically iso-
lated rom one another
4.2 Handling batteries / rechargeable batteries correctly
When inserting batteries / rechargeable batteries ensure that
these are correctly polarized.
I the device will probably not be needed or a relatively long pe-
riod o time or i the batteries are empty, remove the batteries;
this will prevent battery acid leaking onto the device and damag-
ing it.
Rechargeable batteries should be recharged as and when nec-
essary.
You should never attempt to recharge an ordinary (non-
rechargeable) battery; it may explode !
Batteries / rechargeable batteries must never be short-circuited
or thrown onto the ire.
Batteries / rechargeable batteries are special waste and must
not be discarded together with normal domestic waste.
ALMEMO® 2890-9 9

5. Introduction
5. I TRODUCTIO
The data logger ALMEMO® 2890-9 is a new instrument rom the unique prod-
uct range o measuring devices that are all equipped with the ALMEMO® con-
nector system, which has been patented by Ahlborn GmbH. The intelligent
ALMEMO® connector provides important advantages with regard to the con-
nection o sensors and peripherals as all parameters are stored in an EEP-
ROM within the connector. As a result, the programming that usually has to be
per ormed or 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. There ore, all o the
ALMEMO® measuring system items listed below are described, in detail, in a
separate ALMEMO® manual that is supplied with every device:
Detailed description o the ALMEMO® system (manual section 1)
Overview o the device unctions and measuring ranges (manual section 2)
All sensors with basic principles, operation, technical data (man. section 3)
The options or connecting existing sensors (manual section 4)
All analog and digital output modules (manual section 5.1)
The inter ace module RS232, iber optics, Centronics (manual section 5.2)
The entire ALMEMO® networking system (manual section 5.3)
All unctions and their control via the inter ace (manual section 6)
A complete inter ace command list with all print outputs (manual section 7)
These operating instructions only cover eatures and controls that are speci ic
or a certain device. As a result, many sections will o ten provide a note re er-
ring to the more detailed description within the manual (man. sect. x.x.x).
5.1 Function Range of the ALMEMO 2890-8
The ALMEMO® 2890-9 data logger has 9 electrically isolated measuring inputs
- suitable or all ALMEMO® sensors. The measuring possibilities are virtually
unlimited; there are 36 channels in the sensor connectors and 4 device-internal
unction channels - with over 70 measuring ranges. For operation purposes the
device incorporates an LCD graphics display, a thumb-wheel, and a so t-key
keypad with cursor block. User menus can be con igured to adapt the display
or any application. The data logger unction is carried out by a real time clock
and a 512kB EEPROM memory or approximately 100000 measured values.
Two output sockets allow or connecting any ALMEMO® output modules, or
example, the digital inter ace, memory card, analogue output, trigger input or
alarm contacts. Several devices can be networked by simply connecting them
with network cables.
10 ALMEMO® 2890-9

Function Range o the ALMEMO 2890-8
5.1.1 Sensor Programming
The measuring channels are automatically programmed by the ALMEMO®
connectors. However, the user can easily complete or modi y the programming
via keyboard or via inter ace.
Measuring Ranges
There are corresponding measuring ranges or sensors with a non-linear char-
acteristic such as 10 thermocouple types, Ntc and Pt100 sensors, in rared sen-
sors, and low sensors (rotating vanes, thermoanemometers, pitot tubes).
Humidity sensors are available with unction channels that also calculate hu-
midity data such as dew point, mixture ratio, vapour pressure and enthalpy.
Even complex chemical sensors can be used. The acquisition o measured
data rom other sensors is easily possible by using the voltage, current and re-
sistance 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 or digital signals and or measuring requencies
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 di erences o certain measuring
junctions can be programmed as unction channels, also in device internal
channels, and can be processed and printed like normal measuring junctions.
Furthermore, unction channels or special measuring tasks are provided to de-
termine the temperature coe icient Q/DT and wet bulb globe temperature.
Dimension
The 2 digit dimension can be altered or each measuring channel so that the
display and the printout will always indicate the correct dimension, or example
when a transmitter is connected. The conversion rom °C to °F is automatically
per ormed according to the dimension.
ame of Measured Values
For identi ication o the sensors a 10-digit alphanumeric name is provided. It is
entered via the keypad or the inter ace and appears on the display, the printout
or the computer display.
Correction of Measured Values
For correcting measured values a zero point and slope correction can be ap-
plied to the measured value o each measuring channel. This also allows or
sensors to be interchanged that usually, at irst, require an adjustment (expan-
sion, orce, pH). The zero point and the slope correction are virtually per ormed
by the push o a button.
Scaling
The base value and the actor allow or a urther scaling o the corrected mea-
sured value o each measuring channel or zero point and slope. The decimal
ALMEMO® 2890-9 11

5. Introduction
point position can be set by the exponent. By setting to zero and entering the
nominal value the scaling values can be automatically calculated.
Limit Values and Alarm
Two limit values (1 max and 1 min) can be set or each meas. channel. I a
limit value is exceeded alarm contacts, that can be individually allocated to limit
values, are provided by means o relay output modules. 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 o the connector can be protected
against undesired access by means o a graded locking unction.
5.1.2 Measurement
A total o up to 36 meas. channels are available or 9 transducers, i.e. it is also
possible to evaluate double sensors, individually scaled sensors, or sensors
with unction channels. The meas. channels can be successively selected or-
wards or backwards via keypad. By de ault all measuring points are scanned
continuously at a measuring rate o 10 mops and the data thus obtained is
listed in the display. However, i you want to have the measured values or the
selected channel sent to an analog output, it may be an advantage to use
semi-continuous mode instead; the output value will then always be re reshed
at hal the measuring rate set - irrespective o the number o measuring points
involved.
Measured Values
The measured values o 1 to 20 measuring points can be indicated on the dis-
play in di erent menus (that can also be con igured) in three ont sizes, as bar
graph or as line chart. They are automatically acquired with auto zero and sel
calibration and can also be arbitrarily corrected and scaled as required. A sen-
sor breakage condition is, with most sensors, automatically detected.
Analog Output and Scaling
By means o analog start and analog end any measuring point can be scaled
so that the resulting measuring range covers the ull range o the bar graph or
line chart or o an analog output (2V, 10V or 20mA). The measured value o
any measuring point as well as a programmed value can be output to the ana-
log output
Measuring Functions
Special measuring unctions are required or some sensors to achieve an opti-
mal data acquisition. The cold junction compensation is available or thermo-
couples, a temperature compensation or dynamic pressure and pH and
conductivity probes, and an atmospheric air pressure compensation or humid-
ity sensors, dynamic pressure sensors and O2 sensors. With in rared sensors
the parameters zero point and slope correction are used or background tem-
12 ALMEMO® 2890-9

Function Range o the ALMEMO 2890-8
perature and emissivity actor.
Max and Min Value
Each measurement involves an acquisition and storage o the Max value and
the Min value including the time and date. The values can be displayed, printed
or cleared.
Average Value
Measured values can be expressed as a sliding average obtained by continu-
ous automatic smoothing or averaged over a particular period or cycle or over
a series o individual measuring operations.
5.1.3 Process flow control
A continuous measuring point scan with a time-based process low control or
the output o measuring valures is required to register the measuring data o all
connected sensors. For this purpose, an output cycle is available and, i ast
processing is required, the conversation rate is available. The measurement
can be started and stopped by using the keyboard, the inter ace, an external
trigger signal, the real time clock or an exceeding o limit values.
Time and Date
The real time clock with data unction or the pure measuring time are used or
an accurate recording o any measurement. Start and end time/date can be
programmed in order to start or stop a measurement.
Cycle
The Cycle is programmable between 1 s and 59 h, 59 min and 59 s and pro-
vides a cyclic output o measured values to the inter aces or memories and
also provides a cyclic averaging.
Print Cycle Factor
I necessary, the print cycle actor allows or limiting the data output o particu-
lar channels so that an excessice data low can be limited, especially during
data storage.
Average Value over Measuring Point Scans
The measured values resulting rom scanning measuring junctions can be av-
eraged as desired either over the total measuring time or over the cycle time.
Function channels are available or a cyclic output and storage o these aver-
age values.
Conversion Rate
With the ALMEMO® 2890-9 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 per orm an
output via the inter ace.
Data Memory
During the cycle, all measured values can be manually or automatically stored
in an EEPROM. The memory capacity is, as standard, 512 Kilobyte, which al-
ALMEMO® 2890-9 13

5. Introduction
lows up to 100.000 measured values. The memory organisation can be con ig-
ured as linear or ring memory.The output can be carried out via the display or
the inter ace. It is possible to speci y a selection according to a time interval or
number. Memory capacity can be increased substantially by means o an ex-
ternal memory connector with a multi-media memory card. With an external
memory connector, available as an accessory, iles can be read out very
quickly via any standard card reader.
umbering of Measurements
By entering a number, single scans or entire series o measurements can be
identi ied and selectively read out rom the memory.
Control Outputs
Via keyboard and inter ace allows to individually trigger up to 4 output relays
and one analog output.
Operation
All measuring and unction values can be displayed in di erent menus on the
dot matrix LCD display. 3 user menus can be individually con igured rom
nearly 50 unctions or your speci ic applications. Using texts, lines and blank
lines allows to ormat the printout in an application-speci ic style. Nine keys
( our o them are so t keys) can be used to operate the device. This also allows
you to ully program the sensors, the device and the process control.
Output
All data logs, menu unctions and stored measured values and programmed
parameters can be provided as output to any peripheral equipment. Various in-
ter ace cables can be used to provide a RS232, RS422, Centronics or Ethernet
inter ace. The output o measuring data can be selected in list ormat, columns
or spreadsheet ormat. Files in spreadsheet ormat can be processed by each
spreadsheet so tware. The print header can be programmed speci ically to the
company or application.
etworking
All ALMEMO® devices can be addressed and can be easily networked by sim-
ply linking them using network cables, or RS422 network distributors or longer
distances.
Software
The AMR-Control so tware, which allows or the entire programming o the
sensors, the con iguration o the measuring instrument, o the user menus and
the read-out o the data memory is supplied with each ALMEMO®manual. The
integrated terminal also allows or online measurements. The WINDOWS®
so tware WIN-Control is available or data acquisition o networked devices,
graphical presentation and complex data processing.
14 ALMEMO® 2890-9

Initial Operation
6. I ITIAL OPERATIO
Sensor connection Connect transducers to the sockets M0 to M8 (1), s. 8.
Power supply with ccumul tors or m ins d pter on DC (5) s. 7.1, 7.2
Switch-on Move the le t slide switch (1) upwards, s. 7.5
Automatical display o the last measuring menu, s. 10. keys:
Menu selection MEAS.-Menus: call up with key: < ESC > or F4
e.g. select menu StandardDisplay , s. 9.1  /  ... ( F )
Call up the menu with key: 
Select meas. point (s. 10.1.1) with keys:  /  ... ( M )
Select unction Max/MinVal (s. 9.4) with: PROG ,  ...
Clear max/min values, s. 10.1.2 < CLR > or F1
Output of measuring data or memory via interface:
- Connect peripheral device, via data cable, to socket A1 (3), s. man. 5.2
- Set 9600bd, 8 data bits, 1 stop bit, no parity at peripheral device
Single output/storage, s. 10.3.1 < MANU > or F2
Cyclic measurement: Select Cy le-Timer : PROG ,  ...
Enter cycle (hh:mm:ss) s. 9.5 Cy le-Timer: 00:05:00Sn
Output ormat list ´ ´, columns ´n´, table ´t´ < FORM> or F3 ...
Stop programming < ESC> or F4
Start/stop the cyclic measurement, s. 10.3.2 <START> , <STOP> or F1
Output of memory data to printer or computer:
Select the unction Memory Free with: PROG ,  ...
Memory data output, s. 11.2.6 < PRINT> or F3
Clear memory, s. 11.2.6 < CMEM >
ALMEMO® 2890-9 15
F1 F2 | F3 F4

 ON PROG 

F1 F2 | F3 F4

 ON PROG 

* ALMEMO 2890-9 *
±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±
MEASURING-Menus:
Standard display ©
U1 Meas. value orre tion
U2 Averaging
U3 Volume flow
Data logger
Multi hannel display
*List of measuring points
Bar harts
Line diagram
_____________________
Menu1 PROGRAMMING-Menus
Menu2 ASSISTANT-Menus
POFF *ON F MENU1 MENU2
C © REC COM l© ©l R01 * ´´´´´´µµµµ¶
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
01: Velo ity m/s
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28.67
Maximum value: 31.34 mls
Minimum value: 25.37 mls
Cy le-timer: 00:02:30 Un
Memory free: 512.0 kB
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7. Power supply
7. POWER SUPPLY
Power can be supplied to the instrument in any o the ollowing ways :
Rechargeable battery pack,
NiMH 7.2 volts / 1600 mAh, internal or supplementary ZB 2890-AP
Mains adapter / charge adapter, 12 volts, 2 A ZB1112-NA10
Power supply cable (10-30 volts DC, 1 A), electr. isol. ZB 2590-UK
Our product line includes corresponding accessories.
7.1 Rechargeable battery operation
and supply voltage monitoring
The standard power supply used or this device is a rechargeable battery pack
with 6 NiMH cells (7.2 volts / 1600 mAh). At a current consumption o approx.
37 mA this will operate or approx. 43 hours. I the lighting is switched on con-
tinuously the operating time drops to approx. 16 to 32 hours (depending on
brightness). To prolong the operating time or the purposes o long-term
recording the device can be le t in SLEEP mode. (see 10.2.5). The operating
voltage can be checked in the “power supply” menu; this gives you a basis or
estimating the remaining operating time. (see 10.7). As soon as the remaining
battery capacity drops to approx. 10% the ´´µµµµµµµµµ¶ symbol in the status line o the
display starts to lash. As and when this happens the battery should be
recharged using the mains adapter provided (12 volts, 2 A) (ZB1112-NA10);
delay may result in critically low discharge and damage the battery. (see 6.2).
The NiMH rechargeable batteries can in act be recharged at any time and in
any charge status using the intelligent charge circuitry. I the batteries are com -
pletely discharged, the device will switch o but measured data and the time-
o -day will be maintained in the battery-bu ered memory. (see 6.6) To continue
operation without having to wait you can replace the discharged battery with a
supplementary battery pack (ZB 2590-AP).
When replacing the rechargeable battery pack ensure that type ZB
2890-AP with Ntc is used; the predecessor model o the recharge-
able battery packs ZB 2590-AP will not unction on this device.
7.2 Mains Operation
To supply the device with power rom an external source or to recharge the
batteries the mains adapter provided (12 volts / 2 A) (ZB1112-NA10) must be
connected at socket DC (5). Please ensure the mains voltage is correct !
When the mains adapter is plugged in the green “CHARGE” LED lights up indi-
cating that the batteries are being recharged. A ter approx. 2.5 hours the bat-
teries are recharged and the LED goes out again; i.e. the charge circuitry has
switched over to trickle charge. The mains adapter can thus be le t perma-
nently connected to the measuring instrument in bu er mode without risk o
overcharging the batteries.
16 ALMEMO® 2890-9


External DC Voltage Supply
7.3 External DC Voltage Supply
It is also possible to connect another DC voltage (6-12 volts ±5%, minimum
800 mA) to socket DC (5). This must be connected using a low-voltage con-
nector (NES1 as per DIN 42323) with its center pin to minus. I , however, the
power supply has to be electrically isolated rom the transducers or i a larger
input voltage range (10-30 volts) is required, then electrically isolated supply
cable ZB 2590-UK must be used. It will then be possible to use the measuring
instrument in a 12-volt or 24-volt on-board supply system.
7.4 Sensor Supply
At the terminals + (plus) and - (minus) in the ALMEMO® connector there is a
con igurable sensor supply voltage available (sel -healing use, 500 mA). The
sensor is programmed by de ault to 9 volts (150 mA); it can i necessary be
programmed in the power supply menu to 12 volts (100 mA) instead. (see
10.7) In mains operating mode the sensor voltage is set automatically to 12
volts. Other voltages (12, 15, or 24 volts or re erences or a potentiometer and
strain gauge) can be obtained using special connectors.
(see Manual. Sections 4.2.5 and 4.2.6)..
7.5 Switch On/Off, Reinitialisation
To switch on or o use the slide switch (1) located on the le t side o the de -
vice.
● up ON
● down OFF
The measuring menu most recently selected always appears irst in the dis-
play.
A ter the device is switched o the real-time clock continues to run and all
saved values data and settings are retained intact. (see 6.6).
I inter erence (e.g. electrostatic) or a mal unction (e.g. battery ailure) causes
the device to behave abnormally, the device can be reinitialized. You can acti-
vate this reset by pressing key F1 r when switching on. You can restore all de-
vice programming (including times, device designation, user menus, etc.) to
the actory de ault settings by pressing key F4 when switching on. Only the
programming o the sensors in the ALMEMO® connectors remains una ected.
7.6 Data buffering
The sensor programming is stored in the EEPROM o the sensor connector,
the calibration and the programmed parameter o the device is ail-sa e stored
in the EEPROM o the device. Time and date are bu ered by a lithium battery
so that storage o the data is also guaranteed without batteries and when the
device is switched o .
ALMEMO® 2890-9 17

8. Connection o the Transducers
8. CO ECTIO OF THE TRA SDUCERS
Any ALMEMO® sensors can be connected to the ALMEMO® input sockets M0
to M8 o the measuring instrument (2). For connecting existing sensors it is
only necessary to connect a corresponding ALMEMO® connector.
8.1 Transducers
A detailed description o the comprehensive ALMEMO® sensor range (see
manual section 3) and the connection o 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 or disconnecting the connector.
8.2 Measuring inputs and Additional Channels
The measuring instrument ALMEMO® 2890-9 has 9 input sockets (2) that the
measuring channels M0 to M8 are initially allocated to. However, ALMEMO®
sensors can, i required, provide up to 4 channels so that 36 channels are
available with 5 input sockets. The additional channels can be especially used
with humidity sensors with 4 measuring variables (temperature/humidity/dew
point/mixture ratio) or used or unction channels. I 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 o a connector are in-
creased in steps o 10 (e.g. the irst sensor has the channels M0, M10, M20,
M30, the second sensor has the channels M1, M11, M21, M31 etc.).
Device-internal channels:
An innovation on this device is its our extra additional channels. The irst o
these M5 is programmed by de ault as di erential channel M1 – M0. This only
happens, however, i there are two sensors with the same units and same dec-
imal point position connected at measuring points M0 and M1. However, all
our channels can be programmed with any other unction channels (e.g. U-
Bat, CJ, average, volume low, etc.); (s. 11.3.10, man. 6.3.4). Mb1 = M1 and
Mb2 = M0 are always used as re erence channels by de ault.
Advantage o the device-internal channels: I several sensors are being used
or the same application, they do not have to be reprogrammed and can be
reely exchanged without losing their unction channels. I , however, the whole
application operates with just one sensor, then programming in the sensor it-
sel makes more sense.
On the measuring instrument this gives the ollowing channel assignment:
18 ALMEMO® 2890-9

Measuring inputs and Additional Channels
8.3 Isolation
When building up a working measuring arrangement, it is very important that
there cannot low any compensation currents between sensors, power supply
and peripherals. This is the case when all measuring points are on the same
potential or when unequal potentials are electrically isolated.
The 9 analog inputs are electrically isolated rom each other by means o pho-
tovoltaic relays and - on this device or the irst time - also rom the device itsel
and rom the power supply by means o optocouplers. Between all inputs and
outputs (even the analog output cables which are not electrically isolated) the
maximum potential di erence permitted is 50 volts. The voltage at the measur-
ing inputs themselves must not exceed 12 volts (between B, C, D, and A).
However, the following are not electrically isolated : all sensors which are
connected to the common internal power supply ±U or combined sensors
within one connector. The sensors must themselves be isolated or the device
must be operated with an electrically isolated power supply (mains adapter or
connecting cable ZA2690-UK with DC/DC converter). For these sensors the
electrical isolation must be disabled by means o switch S (see above) or by
wire; some inputs would otherwise be le t without re erence potential. (see
10.5.8) Con iguration is by means o element lag 5 ´ISO OFF´; this is usually
set automatically the irst time the device is connected. With certain connectors
(especially divider connectors without power supply) element lag 5 should be
checked and i necessary corrected.
Data and trigger cables are also isolated by means o optocouplers.
ALMEMO® 2890-9 19
M2
M1
M0
Data cable
AC
DC
DC
DC
ADC uC
U-
U+
Sensors
Power supply
10..30V=
230V≈
electr. isol. S
DC DC
A
B
M0 M1 M2 M3 M4
00
10
20
30
03
13
23
33
04
14
24
34
01
11
21
31
02
12
22
32
09
19
29
39
Device internal channels
Di erence M01-M00
05
15
25
35
06
16
26
36
07
17
27
37
08
18
28
38
M5 M6 M7 M8
Sensor channels
1. Channel
2. Channel
3. Channel
4. Channel

9. Display and Keypad
9. DISPLAY A D KEYPAD
9.1 Display and Menu Selection
The display (6) o the measuring instrument ALMEMO 2890-9 consists o a dot
matrix LCD display with 128x128 dots, or 16 lines with 8 dots. For the acquisi-
tion o measuring data with the required unctions and or the programming o
the process control, the sensors and the device parameters, 3 categories o
menus are available: Measuring-Menus (s. 10), Programming-Menus (s. 11)
and Assistant-Menus, which can be called up over corresponding selecting
menus. O the 9 measuring menus, there are 3 ´user´ menus U1, U2, U3,
which are reely de inable by the user (s. 10.7).
I necessary, call up the menu selection using the key: <ESC>
I necessary, select the desired menu selection with key: <MENU1> o. <MENU2>
Switch on the Display Lighting in 3 levels (s. 11.5.5) <  ON >
Select the menus using the keys:  or  ...
Call up the selected menu with key:  or PROG
Or, alternatively, the thumb-wheel (7) on the right side
o the device can be used, rotating it upwards or
downwards and then pressing to con irm.
Back to the last meas. menu using the key once: 
Back to the last programming menu using the key again: 
Back to the menu selection with key: <ESC>
The device designation in the header line can be as easily pro-
grammed(s. 11.5.1) as the menu titles o the user menus (s.
10.7).
20 ALMEMO® 2890-9
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* ALMEMO 2890-9 *
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MEASURING-Menus:
Standard display ©
U1 Meas. value orre tion
U2 Averaging
U3 Volume flow
Data logger
Multi hannel display
*List of measuring points
Bar harts
Line diagram
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Menu1 PROGRAMMING-Menus
Menu2 ASSISTANT-Menus
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* ALMEMO 2890-9 *
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PROGRAMMING-Menus:
Times, y les
Re ording to memory ©
Output from memory
Sensor programming
...Spe ial fun tions
Devi e onfiguration
Output modules
Power supply
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Menu1 ASSISTANT-Menus
Menu2 MEASURING-Menus
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* ALMEMO 2890-9 *
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ASSISTANT-Menus:
Start-Stop
Averaging ©
Volume flow
Fun tion hannels
S aling
Sensor adjustment
Limits, Alarm
Analog output
Thermal oeffi ient
Wet bulb globe temperature
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Menu1 MEASURING-Menus
Menu2 PROGRAMMIER-Menus
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P►=PROG