Ahlborn ALMEMO 3290-8 V5 User manual

Operating Instructions
Data Logger
ALMEMO®3290-8
V2.0
13.07.2000
AHLBORN Mess- und Regelungstechnik GmbH
Eichenfeldstraße 1-3 · D-83607 Holzkirchen
Tel. [phone] · Fax [phone]

Operating Instructions
Data Logger
ALMEMO®3290-8
For reference with the ALMEMO®Manual
Table of Contents
Page
1 INTRODUCTION 4
1.1 Function Range 4
1.2 Front Operating Controls 9
1.3 Rear Operating Controls 11
2 INITIAL OPERATION 12
3 POWER SUPPLY 13
3.1 Mains Supply 13
3.2 Operation with Rechargeable Battery (Option A) 13
3.3 External Power Supply 13
3.4 Switch On/Off, Reinitialisation 13
3.5 Data Buffer 14
4. CONNECTION OF THE TRANSDUCERS 14
4.1 Transducers 14
4.2 Measuring Inputs and Additional Channels 15
5 DISPLAY AND KEYBOARD 16
5.1 Display and Function Selection 16
5.2 Keyboard 17
5.3 Data Input 18
5.4 Keyboard Lock 18
6 SENSOR PROGRAMMING 19
6.1 Selecting the Input Channel 19
6.2 Selecting the Measuring Range 20
6.3 Changing the Dimension 23
2 ALMEMO3290-8
Table of Contents

Page
6.4 Limit Values 23
6.5 Correction Values, Sensor Adjustment 24
6.6 Scaling, Decimal Point Setting 25
6.7 Locking the Programming of the Sensor 26
7 MEASUREMENT 27
7.1 Continuous Measurement of a Measuring Point 27
7.1.1 Selecting the Measuring Point 27
7.1.2 Memory for Peak Values 28
7.1.3 Setting the Measured Value to Zero, Zero Point Correction 28
7.1.4 Atmospheric Pressure Compensation 29
7.2 Single Measuring Point Scan 30
7.3 Cyclic Measuring Point Scan 30
7.3.1 Print Cycle, Output Channel, Output Format 31
7.3.2 Measuring Cycle and Memory Activation 32
7.3.3 Conversion Rate, Continuous Measuring Point Scan 32
7.3.4 Time and Date 33
7.3.5 Time and Date of Start, Time and Date of End 33
7.3.6 Start and Stop by Limit Values 34
7.3.7 Averaging 34
7.4 Data Memory 36
7.4.1 Data Acquisition 36
7.4.2 Use of ALMEMO®Memory connector 37
7.4.3 Output of Measuring Data 38
7.5 Numbering Measurements 39
7.6 Sleep Mode 40
8 DIGITAL DATA OUTPUT 41
8.1 Baud Rate, Data Format 41
8.2 Device Address and Networking 41
8.3 Manual Data Output 42
9 ANALOGUE OUTPUT 44
10 TROUBLESHOOTING 45
11 ELECTROMAGNETIC COMPATIBILITY 46
APPENDIX 47
Technical Data 47
Product Overview 47
ALMEMO3290-8 3
Table of Contents

1. INTRODUCTION
The new data logger ALMEMO®3290-8 Version 5 is an 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 analogue 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, the sections dealing with the system control
via keyboard will only often provide a note referring to a more detailed
description within the manual (manual section x.x.x).
1.1 Function Range
The ALMEMO®3290-8 data logger has nine electrically isolated measuring
inputs with up to 36 measuring channels, a real time clock and a 500kB
memory for approximately 100,000 measured values. 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 a simple connection between the devices. For easy operation it
is equipped with a rotary switch, keyboard and an 8½ digit LCD display.
SENSOR PROGRAMMING
The measuring channels are automatically programmed by the ALMEMO®
connectors of the sensors. However, the user can easily complete or modify
the programming via keyboard or via interface.
4 ALMEMO3290-8
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 voltage, current and
resistance ranges with individual scaling in the connector. Existing sensors can
be used without problems. Only the corresponding ALMEMO®connector has to
be connected using its terminals. Furthermore, there are adapter connectors
with an own microcontroller for digital signals and for measuring frequencies
and pulses. This way, nearly all sensors can be connected to any ALMEMO®
measuring instrument and are interchangeable without requiring any settings.
Function Channels
Maximum, minimum, average values and differences of certain measuring
junctions can be programmed as function channels and can be processed and
printed like normal measuring junctions. Furthermore, function channels for
special measuring tasks are provided to determine temperature coefficient
Q/∆t and wet bulb globe temperatures.
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
Sensors can be identified by a 10 digit alphanumeric designation. It is entered
via the interface and appears on the printout or display if the evaluation is done
via PC.
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.
ALMEMO3290-8 5
Functions

Limit Values and Alarm
Two limit values (1 max and 1 min) can be set for each measuring 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. Furthermore, limit value exceeding can
also be used to start or stop a measurement.
Sensor Locking
All sensor data stored in the EEPROM of the connector can be protected
against undesired access by means of a graded locking function.
MEASUREMENT
A total of up to 36 measuring channels are available for 9 transducers, i.e. it is
also possible to evaluate double sensors, individually scaled sensors, or
sensors with function channels. The measuring channels can be successively
selected forwards or backwards via keyboard. The selected measuring point
can be scanned with a conversion rate of 2.5 or 10 measurements/second.
The measured value is calculated and indicated on the display or, if available,
provided on the analogue output.
Measured Value
A continuous presentation of measuring data from the selected measuring
point is provided and also includes automatic zero point correction and optional
correction of the measured value or new scaling.
A sensor breakage condition is, with most sensors, automatically detected
(exception: connectors with shunts, dividers or additional electronics).
Analogue Output and Scaling
By means of analogue start and analogue end the indicated measured value
can be scaled so that the resulting measuring range covers the full analogue
output range (2V, 10V or 20mA).
Measuring Functions
Special measuring functions are required for some sensors in order to achieve
an optimal acquisition of measuring data. 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.
Maximum and Minimum Value
Each measurement involves an acquisition and storing of the maximum and
minimum value. These values can be displayed, printed or cleared.
6 ALMEMO3290-8
Functions

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 also 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 a display of all measured values, limit value
monitoring including alarm message and output of alarm values, averaging
and, if necessary, a storage of measured values.
Average Value
The measured values resulting from scanning the measuring junctions can be
averaged as desired either over the total measuring time or over the print cycle
time. Function channels are provided for a cyclic output of average values.
Conversion Rate
With ALMEMO®
V5 devices, all measuring points can be continuously
scanned with the conversion rate (2.5 or 10 meas./s). It is possible to store all
measured values in the memory and/or to perform an output via the interface.
Storage of Measured Values
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 100,000 measured values. The
memory organisation can be configured as linear or ring memory. Alernativ are
usably also memory connectors. The output can be optionally performed via
interface, analogue output or display. It is possible to select a certain time
interval, number or alarm value.
ALMEMO3290-8 7
Functions

Numbering of Measurements
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 four output relays and one
analogue output.
Keyboard Lock
The keyboard operation can be locked with a password.
Output
All measuring and programming data is accessible by means of the LCD
display. RS232, RS422 and a Centronics interface are available by using
different interface cables. All data logs, measured values and programmed
parameters can be provided as output to any peripheral equipment. The output
of measuring data can be selected in list format, columns or spreadsheet
format. Files in spreadsheet format can be processed by each spreadsheet
software. The print header can be programmed specifically to the company or
application.
Networking
All ALMEMO®devices can be addressed and can be easily networked by a
simple connection with network cables or network junctions for longer
distances.
Software
The AMR-Control software, which allows for the entire programming of the
sensors, the configuration of the measuring instrument and the read-out of the
data memory is supplied with each ALMEMO®manual. The integrated terminal
also allows for online measurements. The WINDOWS®software packages,
Win-Control and DATA-Control, are available for data acquisition of networked
devices, graphical presentation and complex data processing. The software
LogCel is provided for an online import of data into MS-Excel®.
OPTION Rechargeable Battery
The data logger becomes completely self-sufficient with the option
'rechargeable battery'. Due to the power saving sleep mode, the measuring
instrument can, independent from mains supply, record measuring data for
weeks. Afterwards the rechargeable battery can be fully recharged within 2
hours by means of a power supply.
8 ALMEMO3290-8
Front Operating Controls

1.2 Front Operating Controls
(1) LCD DISPLAY 6½ x 7segment, 2 x 16segment
19:6 4.2 34 mV
Measured value: meas. channel, meas. value, dimension
above -19999 decimal point switch over
Exceed. of range: max/min value flashes
Exceed. of limit value: arrow ALARM illuminated
Battery: < 7 V symbol BAT illuminated
< 6 V display "LobAt"
Times: hr : min : sec
Date: day . mth . year
(2) FUNCTION KEYS
INPUT CH 
Clr
START/STOP MANUAL OUTPUT FUNCTION
ENTER, ß, ×Ø,Ö,Õfor entering programming values
ENTER, Clr clear data, set measured value to zero
ENTER, ßcalibrate measured value
CHselect measuring point
START/STOP cyclic measuring point scan
MANUAL single measuring point scan
OUTPUT data output to interface
FUNCTION select additional functions
ALMEMO3290-8 9
Front Operating Controls

(3) FUNCTION SELECTOR SWITCH
Function Key Additional functions Abbrev.
MEAS. VALUE
NUMBER F deactivate A
CHincrease
A
MAX VALUE F analogue output-end AE
MIN VALUE F analogue output-start AS
AVERAGE V F averaging mode AM
F,F number of aver. values C
RANGE, UNIT F locking mode LM
F,F locking code LC
LV MAX F action Hi start/stop AH
LV MIN F action Lo start/stop AL
BASE F zero point correction ZC
F * ambient temperature AT
FACTOR, ± Exponent F slopecorrection SC
F * emissivity factor EF
MEMORY F free memory MF
MEAS CYCLE CHstore on/off
S
F conversion rate C R
PRINT CYCLE CHoutput channel
U
F device address A
TIME F start time ST
F,F end time ET
DATE F start date SD
F,F end date ED
BAUD RATE F atmospheric pressure mb
* infrared sensors only
(4) ON/OFF SWITCH push button with lamp
Lamp green illuminated: power supply is connected
Option 'recharg. batt.' illuminated: battery is being recharged
flashing: battery is completely recharged
Lamp red instrument is switched on
10 ALMEMO3290-8
Front Operating Controls

1.3 Rear Operating Controls
(5) MEASURING INPUTS
M0 to M9 for all sensors with an ALMEMO®connector
M10 to M18/M38 additional channels for double sensors
and function channels
(6) OUTPUTS
A1 RS232 interface cable (ZA 1909-DK),
RS232 fiber optic cable (ZA 1909-DKL)
RS 422 network branch box (ZA 5099-NVB)
Centronics interface cable (ZA 1936-DK)
A1 or A2 analogue output with cable (ZA 1601-RK)
A2 networking with network cable (ZA1999-NK)
Data storage with memory connector (ZA 1904-SS)
trigger input with cable (ZA 1000-EK/ET),
2 relay outputs with cable (ZA 1000-EGK/EAK)
(7) CONNECTOR SOCKET
U-DC mains adapter ZB 5090-NA2 12V, 800mA
External voltage connector cable ZB 5090-EK for 7-13V DC
supply cable electr. isolated ZB 3090-UK for
10-30V DC with DC/DC converter, 250 mA
ALMEMO3290-8 11
Rear Operating Controls

2. INITIAL OPERATION
1. Connect transducers to the sockets M0 to M8 (5), see 4.
2. Ensure power supply by mains adapter connected to socket (7), see 3.1
3. For switching on set the push button (4) so the control lamp is on, s. 3.4.
4. For displaying the measured values,
select function MEAS. VALUE by using the rotary switch (3),
use key CHto select the measuring channel, read meas. value, see 7.1.
5. For storing the measured values:
Use function MEMORY and keys ENTER, Clr to clear the memory, s. 7.4.2.
Use MEAS. CYCLE and key CHto activate the memory, see 7.3.2.
Single storing by using the key MANUAL, see 7.2.
Enter measuring cycle for cyclic storing, see 7.3.2.
Enter time and date, as required, see 7.3.4.
Enter time and date of start or end of a measurement as required, see 7.3.5.
Use key START/STOP to start and stop a cyclic storing, see 7.3.
Output of memory data to printer or computer
Connect peripheral device via interface cable to socket A1, see manual 5.2.
Set 9600 bd, 8 data bits, 1 stop bit, no parity at peripheral device.
Use key CHin function OUTP. CYCLE to set the output channel ´ U´ and,
possibly, output format columns ´nU´ or spreadsheet/table ´tU´, see 7.3.1.
Use key OUTPUT within function MEMORY to output meas.values, see 7.4.2.
6. Cyclic output of measured values to printer or computer
Connect peripheral device via interface cable to socket A1, see manual 5.2.
Set 9600 bd, 8 data bits, 1 stop bit, no parity at peripheral device.
Enter time and date, as required, see 7.3.4.
Program the print cycle within function OUTP. CYCLE,
use key CHto set the output channel ´ U´ and, if required,
the output format columns ´nU´ or spreadsheet/table ´tU´, see 7.3.1.
Use key START/STOP to start and stop the cyclic meas. point scan, see 7.3.
7. Monitoring of limit values
Enter limit values, see 6.4.
Program measuring cycle, see 7.3.2.
Connect alarm device with alarm module to socket A2, see man. 5.1.2/5.1.3.
For an alarm print use key CHwithin function OUTP. CYCLE to activate
the output channel ´ U´, see 7.3.1.
Use key START/STOP to start and stop the cyclic meas. point scan, see 7.3.
8. Evaluation of the measurement
Display max and min values within function MAX.VAL. or MIN.VAL.,
see 7.1.2.
12 ALMEMO3290-8
Initial Operation

3. POWER SUPPLY
3.1 Mains Operation
In general, the mains adapter ZB 5090-NA2 (12V DC, 800mA) is used for the
power supply to the instrument. It is connected to the socket U-DC (7) and is
locked by turning it to the right.
3.2 Operation with Rechargeable Battery (Option A)
With the option A, a 7.2V NiCd rechargeable battery with 1.5 Ah will be
installed, which allows, at a current consumption of approximately 15mA, an
uninterrupted operating time of 100 hours at minimum. The operating time will
be shorter when sensors are connected that require additional current (e.g.
humidity sensors FH A646 2mA or rotating vanes approximately 3mA) or the
serial interface (4mA). However, the sleep mode is meant for a long term
operation of the data logger. It allows for a measurement of approximately
30000 measuring cycles (see 7.6). An exact determination of the voltage of the
rechargeable battery and an estimation of the remaining operating time is
available with the measuring channel ´Batt´.
The supplied mains adapter ZB 5090-NA2 allows to recharge a discharged
battery within 2 hours. During the recharge process the green lamp of the
on/off switch (4) is continuously illuminated for charge control. (Attention! Due
to the heat build-up in the unit during this process, thermocouple
measurements with an internal VC may be erroneous!). If the green lamp
flashes, the battery is completely recharged and the charge circuit is switched
to trickle charging. As a result, the power supply can, during buffer operation,
remain connected to the measuring instrument. If the instrument is operated
with the rechargeable battery only, the green lamp in the on/off switch (4) is not
illuminated at all.
3.3 External Voltage Supply
It is also possible to connect another DC voltage 7...13V to the socket U-DC
(7). The cable ZB 5090-EK, fitted with 2 banana plugs, is available for the
connection. However, the electrically isolated supply cable ZB 3090-UK must
be used if an electrical isolation between power supply and transducers is
required or if a larger input voltage range 10...30V is required. It allows to
operate the measuring instrument with 12V or 24V mains supply.
3.4 Switch On/Off, Reinitialisation
If the power supply is properly connected the green lamp in the push button (4)
will be illuminated. If a rechargeable battery is installed the lamp is used for
charge control (see 3.2).
For switching on the instrument, the push button must be pressed. The red
control lamp aside will then be illuminated.
ALMEMO3290-8 13
Power Supply

The device can be switched off by operating the push button once again. The
red control lamp will no longer be illuminated. However, the real time clock
continues operating and, due to the buffering rechargeable battery, all stored
values remain available (see 3.5).
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 completely reinitialised.
The reset can be achieved if the key Clr is pressed during switch-on. All
internal data such as max, min and average values, and the data memory will
be cleared. Furthermore, cycles, time, date and device address are set to zero
and the conversion rate and atmospheric pressure will be set to the standard
values. However, the device configuration and the sensor programming within
the ALMEMO®connectors will not be affected by the reset.
3.5 Data Buffer
For an uninterrupted power supply of the real time clock and the memory a
NiCd rechargeable battery (2.4V) for buffering is installed, which ensures that
time and date data and all stored values are maintained for several months if
the mains supply is not available. However, to prevent the rechargeable battery
from completely discharging and to avoid the loss of data, the instrument be
operated with mains supply for a few hours should at least once per month.
4. CONNECTION OF THE TRANSDUCERS
Any ALMEMO®sensors can be connected to the ALMEMO®input sockets M0
to M8 of the measuring instrument (5). 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.
14 ALMEMO3290-8
Connection of the Transducers

4.2 Measuring Inputs and Additional Channels
The measuring instrument ALMEMO®3290-8 has 9 input sockets (5) that the
measuring channels M0 to M8 are initially allocated to. However, ALMEMO®
sensors can, if required, provide up to 4 channels so that 36 channels are
available with 9 input sockets. The additional channels can be especially used
with humidity sensors with 4 measuring variables (temperature/humidity/dew
point/mixture ratio) or used for function channels. If required, the sensor can
also be programmed with several ranges or scalings or, depending on the pin
assignment, 2 or 3 sensors can be combined in one connector (e.g. rH/Ntc,
mV/V, mA/V etc.). The additional measuring channels of a connector are
increased in steps of 10 (e.g. the first sensor has the channels M0, M10, M20,
M30, the second sensor has the channels M1, M11, M21, M31 etc.).
The 9 analogue 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.
000105 0206 0307 0408
101115 1216 1317 1418
202125 2226 2327 2428
303135 3236 3337 3438
chann. 1
chann. 2
chann. 3
chann. 4
M0M1M5 M2M6 M3M7 M4M8
A2A1
ALMEMO3290-8 15
Connection of the Transducers

5. DISPLAY AND KEYBOARD
5.1 Display and Function Selection
The display of the measuring device ALMEMO®3290-8 consists of an LCD
module with six and a half 7-segment digits, two 16-segment digits, and a
battery symbol and seven arrows for indicating the operating status.
The basic functions are set by the function selector switch (3). If required, the
additional functions can be selected by the key FUNCTION. The presentation of
the functions on the display is as follows:
Meas. Val.: chann. - meas. value dimension 1:2.1 2 3 4 V
Range: chann. short name dimension 1: N i C r °C
Parameter: chann. - value dimension
chann. - factor exponent
Number: value -/active N 1 2 - 0 1 A
Cycles: hours minutes seconds output chann.
Times: hours minutes seconds function
Start: not activated function - - - - - - ST
End: hours minutes seconds function 1 8:3 0:0 0 ET
Date: day month year DA 0 1.0 1.9 6 DA
Baud Rate: baud BR I 9 6 0 0 BR
Two digits are required to display the channel with the additional channels
M20 to M38. The measured value is shifted by one digit to the right if it has
more than 4 digits. Another digit is lost if the measured value is negative.
Example: channel 20, measured value 2.1234 V: 2 0:2.1 2 3 V
1 2:3 4:5 6 TM
16 ALMEMO3290-8
Display and Keyboard

Special Operating Conditions
Segment test of the display automatically after switch-on.
Supply voltage: lower than 7V: symbol illuminated
BAT
lower than 6V:
1:L o b A t
Sensors that are not connected,
deactivated measuring points,
cleared programming values.
Sensor correction or scaling arrow CORR illuminated.
Measuring point scan in progress arrow START illuminated.
Measuring point scan with storing arrow MEMORY illuminated.
Measuring point scan with output arrow RS232C illuminated.
Additional function selected arrow Filluminated.
Alarm Conditions
are displayed as follows and cause an alarm (see manual 6.3.9):
Sensor breakage: abbr. flashes
1: N i C r °C
Overshooting of measuring range: maximum value flashes
Undershooting of measuring range: minimum value flashes
Exceeding of limit value: arrow ALARM illuminated
Undershoot. of meas. range CJ compens. (cold junction)
Measuring without ext. CJC or CJC break.: flashes
Exceeding of range of values (>65000): flashes
1:6 5 0 0 0
5.2 Keyboard
The keyboard (5) has the following functions that are displayed above the keys:
Function Normal Enter
Programming of Parameters ENTER Ö
Selecting Measuring Points CHClr
Start and Stop of Meas. Point Scans START/STOP ×
Single Measuring Point Scan MANUAL Ø
Data Output OUTPUT Õ
Selecting Additional Functions FUNCTION ß
After operating the key ENTER a digit or abbreviation is flashes in the display,
i.e. the instrument is in edit mode and the white key designations are valid. The
keys ß, ×, Øare then available for altering the input figure, Ö, Õoperate as
cursor keys and the key Clr is used for clearing parameter data. The input is
complete when the last digit has been confirmed with operating the key Ö.
1: - - - -
1: C J
ALMEMO3290-8 17
Display and Keyboard

5.3 Data Entry
The programming of numeric parameters is performed as follows:
The desired function can be selected using the rotary switch (3)
Additional functions, if required, are selected with key FUNCTION.
The programming is started by the key ENTER,
The first digit flashes
and can be altered.
The digit can be increased using the key ×.
After exceeding the maximum value the cycle restarts from zero.
The digit can be decreased using the key Ø.
After falling below zero the maximum value follows (9 or 5).
The sign can be changed using the key ß.
A switch to the next digit is performed using the key Ö.
To switch back to the previous digit press the key Õ.
The programming process is complete
after setting the last digit and again operating the key Ö.
Programming and measured values can be cleared using ,
ENTER
Clr
The programming process can be cancelled by operating the rotary switch.
5.4 Keyboard Lock
To protect all settings during a measurement against unauthorised alteration
the keyboard can, in addition to the sensor locking (see. 6.7), be locked by
using a locking code (password).
FUNCTION
ENTER
ENTER
18 ALMEMO3290-8
Display and Keyboard

Selecting the Function Locking Code: RANGE ,
FUNCTION FUNCTION
If the locking is switched off, the display indicates:
To lock the access a four digit number
is entered (see 5.3) and the display indicates:
The functions ENTER, START/STOP and OUTPUT are no longer available in this
operating stage. However, a reading of all parameters on all channels is still
possible. The locking can only be released by re-entering the same locking
code. The locking is also cleared when a reinitialisation is performed (see 3.4).
6. SENSOR PROGRAMMING
As all ALMEMO®instruments contain the whole sensor programming stored in
the ALMEMO®connector plug, the user does not usually need to perform any
programming. Only if, for example, sensor errors must be corrected or existing
sensors must be scaled or limit values need to be specified the comprehensive
programming options have to be used. It must be considered that standard
sensors are, by a locking mode, protected against unintentional modification
and that the locking level must first be reduced before desired changes can be
performed (see 6.7). All parameters can easily be entered or changed via
keyboard when the corresponding sensor connector is connected.
6.1 Selecting the Input Channel
To query or to program the parameters of a sensor the corresponding input
channel must be selected within the desired function using the key CH. If this
is performed within any programming function, i.e. not with the rotary switch
moved to MEAS. VALUE, only the input channel will be changed but not the
selected measuring channel, i.e. the measurement is not being interrupted.
Increase the input channel by: (programmed channels only)
CH
Decrease the input channel by: press and hold (approx. 1s)
CH
O P E N LC
C L O S E d LC
ALMEMO3290-8 19
Sensor Programming

6.2 Selecting the Measuring Range
If users want to program the connectors on their own or frequently change the
measuring range, it is necessary that the locking is cleared (see 6.7) and
special connectors may be required for some transducers (e.g. thermo, shunt,
divider etc., see table).
The selection of the measuring range is performed within the function RANGE.
For activating a channel that has not yet been programmed the locking of the
1st channel must be cleared for the corresponding sensor. After selecting the
input channel and pressing the key ENTER the abbreviation for the measuring
range flashes in the display. The keys ×and Øallow to select all available
ranges in the sequence given below. If the key ENTER is pressed and held it is
possible to jump from group to group (group ranges bolded in table). If the
desired range is displayed the programming can be completed by pressing
ENTER once again and the data is transmitted to the connector. All
programming values of the input channel are then cleared.
Function Selection: RANGE 1: N i C r °C
Example : channel M1, range NiCr, dimension °C
Change Meas. Range: , ... or ... ,
ENTER ENTER
Transducer Connector /
Cable / Sensor
Meas. Range Dim. Display
Pt100-1 ZA 9000-FS -200.0... +850.0 °C P104
Pt100-2 ZA 9000-FS -200.00...+200.00 °C P204
Ni100 ZA 9000-FS -60.0... +240.0 °C N104
NiCr-Ni (K) ZA 9020-FS -200.0...+1370.0 °C NiCr
NiCroSil-NiSil (N) ZA 9020-FS -200.0...+1300.0 °C NiSi
Fe-CuNi (L) ZA 9000-FS -200.0... +900.0 °C FECO
Fe-CuNi (J) ZA 9000-FS -200.0...+1000.0 °C IrCo
Cu-CuNi (U) ZA 9000-FS -200.0... +600.0 °C CUCO
Cu-CuNi (T) ZA 9000-FS -200.0... +400.0 °C CoCo
PtRh10-Pt (S) ZA 9000-FS 0.0...+1760.0 °C Pt10
PtRh13-Pt (R) ZA 9000-FS 0.0...+1760.0 °C Pt13
PtRh30-PtRh6 (B) ZA 9000-FS +400.0...+1800.0 °C EL18
Au-FeCr ZA 9000-FS -270.0... +60.0 °C AUFE
Ntc type N ZA 9000-FS -30.00...+125.00 °C Ntc
Millivolt 1 ZA 9000-FS -26.000...+26.000 mV U 26
Millivolt ZA 9000-FS -10.000...+55.000 mV U 55
20 ALMEMO3290-8
Sensor Programming