Ahlborn ALMEMO 6290-7B User manual

Operating Instructions
Measuring Instrument
with Built-In Printer
ALMEMO®6290-7B
V1.3
18.03.2004
ALMEMO6290-7B

Operating Instructions
Measuring Instrument with Built-In Printer
ALMEMO®6290-7B
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 Rechargeable Battery Operation 13
3.2 Mains Operation 13
3.3 External Power Supply 13
3.4 Switch On/Off, Reinitialisation 14
3.5 Data Buffer 14
4 CONNECTION OF THE TRANSDUCERS 15
4.1 Transducers 15
4.2 Measuring Inputs and Additional Channels 15
5 DISPLAY AND KEYBOARD 17
5.1 Display 17
5.2 Selecting and Activating Functions 18
5.3 Keyboard 19
5.4 Data Input 20
5.5 Keyboard Lock 20
1 ALMEMO6290-7B
Table of Contents

Page
6 SENSOR PROGRAMMING 21
6.1 Selecting the Input Channel 21
6.2 Selecting the Measuring Range 21
6.3 Changing the Dimension 24
6.4 Limit Values 25
6.5 Correction Values, Sensor Adjustment 25
6.6 Scaling, Decimal Point Setting 26
6.7 Locking the Programming of the Sensor 27
7 MEASUREMENT 28
7.1 Continuous Measurement of a Measuring Point 28
7.1.1 Selecting the Measuring Point 28
7.1.2 Memory for Peak Values 29
7.1.3 Setting the Measured Value to Zero, Zero Point Correction 29
7.1.4 Atmospheric Pressure Compensation 30
7.2 Measuring Point Scan 31
7.2.1 Single Measuring Point Scan 31
7.2.2 Cyclic Measuring Point Scan 31
7.2.3 Print Cycle 32
7.2.4 Time and Date 32
7.2.5 Sleep Mode 33
8 DIGITAL DATA OUTPUT 34
8.1 Output Mode 34
8.2 Built-In Printer 34
8.3 Print 35
8.3.1 Programming 35
8.3.2 List of Measured Values 35
8.3.3 Measured Values and Max and Min Values 36
8.4 Plot 36
8.4.1 Plot Range 37
8.4.2 Paper Feed 38
8.4.3 Line Plot 38
8.5 Output via Serial Interface 39
8.5.1 Baud Rate, Data Format 39
8.5.2 List of Measured Values, Output Formats 39
8.5.3 Manual Data Output 40
8.5.4 Device Address and Networking 41
8.6 Data Memory (Option S) 42
8.6.1 Memory Functions 42
8.6.2 Memory Output 44
ALMEMO6290-7B 2
Table of Contents

Page
9 TROUBLESHOOTING 45
10 ELECTROMAGNETIC COMPATIBILITY 46
APPENDIX 47
Technical Data 47
Product Overview 48
Your Contacts 49
3 ALMEMO6290-7B
Table of Contents

1. INTRODUCTION
The new measuring instrument with built-in printer ALMEMO®6290-7B
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®instruments
in the same way. The operation and programming is identical with all units.
Therefore, all ALMEMO®measuring system items listed below are described,
in detail, in a separate ALMEMO®manual supplied with each 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®6290-7B instrument with built-in printer allows for acquiring
measured values from 2 sensors and up to 8 channels and, optionally, for an
alphanumerical printout or line plot. With option S (memory), data can be
recorded and reproduced in any form. The integrated rechargeable batteries
offer a sleep mode operation allowing for long term recording that is
independent from mains supply. All ALMEMO®output modules, e.g. analogue
output, digital interface, trigger input or alarm contacts can be connected to the
2 output sockets. Several devices can be easily networked by simply
connecting them. For easy operation it is equipped with a keyboard and an 8½
digit LCD display. The many functions for optimal evaluation of all sensors, for
flexible process control and data output, are automatically activated or can be
configured as required. Some special functions are only available via interface.
ALMEMO6290-7B 4
Introduction

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.
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. ALMEMO®connectors are available for this purpose
and only have to be connected using the screw 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.
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.
5 ALMEMO6290-7B
Functions

Limit Values and Alarm
Two limit values (max and min) can be set for each measuring channel. Alarm
contacts that can be individually allocated to limit values can be activated by
means of relay output modules if a limit value is exceeded. 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 data logging.
Plot Range
For accurate graphical outputs the plot range can be programmed for each
channel with plot range start and plot range end.
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
Up to 4 measuring channels are available for each transducer, 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).
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.
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).
ALMEMO6290-7B 6
Functions

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.
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 paper feed are available. If
fast processing is required, the data can be recorded according to the
conversion rate. 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.
Output Mode
The setting of the output mode determines whether the plot presents the
measured values in one diagram, or in two diagrams (side by side), or
alphanumerically, to a printer or interface.
Paper Feed
When plotting, the required measuring rate is determined by the available
adjustment of the paper feed.
Print Cycle
The print cycle is programmable between 1s and 59h/59min/59s and provides
a cyclic output of measured values to the interfaces.
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.
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 also possible to
provide all measured values as an output via interface.
Control Outputs
The interface allows to individually trigger up to four output relays and one
analogue output.
PRINTER OUTPUT
All measuring and programming data are, firstly, accessible via LCD display. In
addition, the measuring instrument has an integrated thermal printer with
graphic capabilities, which allows for, either, a line plot with 280 dots, or to print
40 characters/line alphanumerically. In plot mode 4 channels can be optionally
presented with individual scaling in one channel or two channels in two
7 ALMEMO6290-7B
Functions

diagrams. The limit values are drawn as a line. The print mode allows for the
output of the measured values in a list format, or an output of the maximum
and minimum values or of the entire programming.
MEMORY (Option S)
The instrument is, optionally, available with 500 kB memory for 100000
measured values. All data of a measurement are, in addition, stored in a
buffered RAM and can be subsequently reproduced in any form. The storage
organisation can be configured as linear or ring memory. The output can be
carried out via the built-in printer or the interface. A selection with respect to
time intervals or alarm values is available. The following functions are
temporarily available for the corresponding control of the data output:
Output mode plot, print and interface output
Plot range start and plot range end for each channel
Start/end time and start/end date
INTERFACE FUNCTIONS
By using different interface cables an RS232, RS422, RS485 or Centronics
interface is also available. All measurement records and all stored measuring
and programming values can be output to any peripheral device. 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. The baud rate is programmed and stored in the connector plug and
is automatically recognised.
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.
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 and for the configuration of the measuring instrument 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®.
ALMEMO6290-7B 8
Functions

1.2 Front Operating Controls
(1) LCD Display
(a) Symbols for Operating States
Batt. soon empty, charge
BAT
▲ CORR Correction of meas. val.
▲ START Measurement in progress
▲ GRAPH Output graphic plot
▲ LIST Output list print
▲ RS232 Output interface
▲ ALARM Exceeding of limit value
▲ FProgramming function
(b) 6½ x 7 segment display for:
Meas. point, meas. val., meas. range,
meas. values, programming values
cycles, times, date
(c) 2 x 16 segment display for:
Dimension of the measured value,
Abbrev. for additional functions
(2) CHARGING Charge Control Lamp illuminated: battery is recharging
flashing: battery is recharged
9 ALMEMO6290-7B
Front Operating Controls
23
BAT
CORR START GRAPH RS232LIST ALARM F
a
bc

(3) FUNCTION KEYS
ENTER CH ▲
Clr
MEASURE FUNCTION START/STOP PAPER FEED
ENTER, !,"#,$,for entering programming values
ENTER, Clr clear data, set meas. value to zero
ENTER, !adjust measured value
CH▲select measuring point
MEASURE select measuring functions
measured value Dim
maximum value (Hi) MH
minimum value (Lo) ML
memory (option) MY
FUNCTION select programming function
output mode OM
paper feed PF
or print cycle PC
time TM
date DA
range R
plot range start PS
plot range end PE
limit value high LH
Activation by: limit value low LL
+Switch-on with ENTER +locking mode LM
or V24 command +base BA
+factor FA
+exponent EX
"pH probes +"zero point correction ZC
+"slope (gain) correction SC
^ infrared sensors ^ ambient temperature AT
^ emissivity factor EF
* interface cable * baud rate BR
* device address A
~ humidity, dyn. pressure, O2
~atmospheric pressure mb
START/STOP start/stop measurement
PAPER FEED line feed of the built-in printer
ON/OFF switch on/off of the instrument
(4) PRINTER built-in thermal printer:
alphanumerical 40 char./line
graphical 280 dots/line
(5) PAPER COMPARTMENT for temperature-sensitive paper with cover
ALMEMO6290-7B 10
Front Operating Controls

1.4 Rear Operating Controls
(6) MEASURING INPUTS
M1, M2 2 ALMEMO®sockets for all ALMEMO®sensors
M3 to M8 addition. channels for double sensors and function channels
(7) OUTPUT SOCKETS
A1 RS232 interface cable (ZA 1909-DK)
RS232 cable with fiber optics (ZA 1909-DKL)
Centronics interface cable (ZA 1936-DK)
RS 422 network branch box (ZA 5099-NVB)
RS 485 network branch box (ZA 5085-NV)
analogue output 1 (ZA 1601-RK)
A2 network cable (ZA1999-NK)
trigger input (ZA 1000-ET)
relay outputs (ZA 1000-EGK/EAK)
analogue output 2 (ZA 1601-RK)
(8) KEY SWITCH
keyboard locking
(9) POWER SUPPLY SOCKET
7.5V mains adapter ZB 6290-NA 7.5V DC, 450 mA
supply cable ZB 6290-UK 10 to 30V, electr. isol., 250 mA
11 ALMEMO6290-7B
Rear Operating Controls
98 7 6

2. INITIAL OPERATION
1. Connect the transducers to the ALMEMOsockets M1/M3 and M2/M4 (6), s. 4.
2. For battery charging connect mains adapter ZB6290-NA to socket (9), s.3.2.
3. Use key ON/OFF to switch the instrument on, see 3.4.
Attention! The keys might be locked by the key switch (8)!
4. Displaying Measured Values
Select function MEASURE by using the key MEASURE,
select measuring channel by using the key CH▲, read meas. value, s.7.1.1.
Scan all measuring points automatically by using key START/STOP, see 7.2.1.
5. Print Measured Values
Select function output mode ´OM´ by using the key FUNCTION.
Set output mode ´dr´ by using the keys ENTER, "#,$, see 8.1.
Select function print cycle ´PC´ by using the key FUNCTION.
Enter print cycle, see 7.2.3.
Enter correct time and date, as required, see 7.2.4.
Start/stop measurement by using the key START/STOP, see 8.3.2.
6. Plot Measured Values
Set output mode ´PL 1´ or ´PL 2´ in function ´OM´, see 8.1, 8.4.
Select the functions ´PS´ and ´PE´ successively by using the key FUNCTION
and enter the plot range start and range end for all plot channels (s. 8.4.1).
Select function paper feed ´PF´ by using the key FUNCTION,
enter paper feed in mm/h, see 8.4.2.
Start/stop measurement by using the key START/STOP, see 8.4.3.
7. Memory Output to Printer or Computer (with option S only)
Connect peripheral device, via interface cable, to socket A1, see man. 5.2.
Set peripheral device to 9600 bd, 8 data bits, 1 stop bit, no parity.
Enter output mode ´U´ in function ´OM´ (see 8.1) and use the key CH▲
for setting the output format ´n´ or spreadsheet (table) ´t´, see 8.5.2.
Select function MEMORY ´MY´ by using the key MEASURE
Start memory output by using the key START/STOP, see 8.6.2.
Clear the memory in function ´MY´ by using the keys ENTER, Clr, see 8.6.1.
8. Display Max and Min Values
by using the key MEASURE in function ´MH´ or ´ML´, see 7.1.2.
ALMEMO6290-7B 12
Initial Operation

3. POWER SUPPLY
3.1 Rechargeable Battery Operation and Voltage Control
For power supply 4 rechargeable NiCd batteries (4.8V/800mAh) are integrated
in the instrument. They have a current consumption of ca. 11mA and last,
without printing, for an operating time of ca. 90 hours. During continuous
operation as a printer, one battery charge lasts ca. 5000 print lines (cycles), ca.
15000 cycles can be reached in plot mode. The instrument must be operated
in sleep mode (see 7.2.5) to reach the above values during long term
operation. When ca. 10% capacity is reached, the symbol appears in the
BAT
display. The built-in printer will stop its operation after printing the following:
STOP TIME: hh:mm:ss
Battery discharged
All other instrument functions remain available. If the option 'Memory' is
available the data logging is also still continued. If the rechargeable battery is
completely discharged, the instrument will switch off. However, measuring data
and time will be maintained in the battery buffered memory (see 3.5).
Generally, the batteries should be recharged, at latest, when the symbol
BAT
is displayed, using the supplied mains adapter ZB 6290-NA, otherwise the
batteries can suffer damage from deep discharge. Rechargeable batteries
must always be charged beforehand if the instrument has been out of
operation for a few months.
3.2 Mains Operation
For external supply of the instrument and for recharging the batteries the
supplied mains adapter ZB 6290-NA (7.5V/450mA) must be connected to the
rear socket (9). After plugging in, the small lamp ´LOAD´ is illuminated and
indicates that the batteries are being recharged. The batteries are recharged
after 4 hours, at maximum, and the small lamp starts to flash, i.e. the charger
circuitry has switched to trickle charge. The mains adapter can, offering a
buffer operation, stay continuously connected to the measuring instrument.
3.3 External Voltage Supply
It is also possible to connect another DC voltage, 7.5V ±5% (450mA), to the
socket (9). The connection is performed by using a low voltage connector
(NES1 according to DIN 42323), centre pin to negative. However, the
electrically isolated supply cable ZB 6290-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.
13 ALMEMO6290-7B
Power Supply

3.4 Switch On/Off, Reinitialisation
The instrument can be switched on by using the key ON/OFF. The instrument
can be switched off by using the same key or automatically when the
rechargeable battery is discharged. However, the real time clock continuous its
operation and all stored data remains available by a buffer battery (see 3.5). To
avoid the instrument being unintentionally switched on or off, the user
operation can be blocked by using the key switch on the back.
If the device shows an irregular behaviour due to interference influences (e.g.
electrostatic charging or discharged buffering battery) or if incorrect
programming must be avoided, the device can be reinitialised.
The reset can be achieved if the key Clr is pressed during switch-on. All
internal data such as maximum and minimum 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
The sensor programming is stored in the EEPROM of the sensor connector,
the calibration of the instrument is fail-safe stored in the EEPROM of the
instrument. The instrument, measuring data, as well as the time and date are
buffered by the lithium battery so that storage of the data is also guaranteed
when the device is switched off or when the batteries are discharged.
ALMEMO6290-7B 14
Power Supply

4. CONNECTION OF THE TRANSDUCERS
Any ALMEMO®sensors can be connected to the ALMEMO®input sockets M1
and M2 of the measuring instrument (6). For connecting existing sensors it is
only necessary to connect a corresponding ALMEMO®connector.
4.1 Transducers
A detailed description of the comprehensive ALMEMO®sensor range (see
manual section 3) and the connection of existing sensors (see manual section
4) to the ALMEMO®instruments are provided in the ALMEMO®manual. All
standard sensors with ALMEMO®connector usually have the measuring range
and dimension already programmed and can be immediately connected to any
input socket. A mechanical coding ensures that sensor and output modules
can only be connected to the correct sockets. Furthermore, each ALMEMO®
connector has two locking levers that snap in when the insertion into the socket
is established and that prevent a disconnection caused by pulling the cable.
Both levers must be pressed on the sides for disconnecting the connector.
4.2 Measuring Inputs and Additional Channels
The ALMEMO®6290-7B measuring instrument with built-in printer has two
input sockets, M1 and M2. However, ALMEMO®connectors can, if required,
provide up to 4 channels. 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
located one level higher. As a result, the measuring instruments have the
following channel occupancy.
12
34
56
78
chann. 1
chann. 2
chann. 3
chann. 4
M1 M2 A2 A1
6290-7
15 ALMEMO6290-7B
Connection of the Transducers

The 2 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 M1 of the device.
ALMEMO6290-7B 16
Connection of the Transducers

5. DISPLAY AND KEYBOARD
5.1 Display
The display of the measuring device ALMEMO®6290-7B 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.
CORR START GRAPH LIST RS232 ALARM F
Special Operating Conditions
Segment test of the display automatically after switch-on.
Batt. almost discharged, no print operation: symbol illuminated
BAT
Batt. discharged, device switches off:
1:L o b A t!
Sensors that are not connected,
deactivated measuring points,
cleared programming values.
Sensor correction or scaling arrow CORR illuminated
Measurement in progress arrow START illuminated
Output as graphic plot arrow GRAPH illuminated
Output as list print arrow LIST illuminated
Output to RS232 interface arrow RS232 illuminated
Function selected arrow Filluminated
Memory function selected (option S) arrow Fflashes
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)
or meas. without ext. CJC or CJC break. flashes
Exceeding of range of values (>65000): flashes
1:6 5 0 0 0!
5.2 Selecting and Activating Functions
23
BAT
1: - - - -!
1: C J!
17 ALMEMO6290-7B
Display and Keyboard

After a reinitialisation (see 3.4) the basic functions (bolded in table) for
operating the instrument with built-in printer are available by using the keys
MEASURE and FUNCTION. More functions are available and can automatically or
manually be activated, as required, for correcting measured values and for
data transfer. This provides fast access and a reduced risk of incorrect entries.
However, to have any function available in case it is required, all functions can
be temporarily activated, i.e. until the instrument is switched off again:
Activate all functions by switching on with the key pressed and held.
ENTER
The functions can be activated by repeatedly operating the keys MEASURE or
FUNCTION. If a key is pressed and held for longer than one second the previous
function can be selected again. The functions are identified by a two digit
abbreviation instead of the dimension. In the display the abbreviation for the
function follows the value of the function. In the case of sensor parameters the
channel number is also included:
MEAS. VALUE FUNCTION
Meas. Functions Abbrev. ProgrammingFunctions Abbrev.
Meas. value 1: 114.3 °C Output mode PL 2 OM
Max value (Hi) 1: 123.4 MH Paper feed 320.00 PF
Min value (Lo) 1: 023.4 ML or print cycle 00:15:00 PC
Memory (option S) 1: 113.2 MY Time 12:34:56 TM
&Date 31.12.99 DA
FUNCTION Range 1: NiCr R
Memory functions Plot range - start 1: 000.0 PS
Pplot range - start 1: 000.0 PS Plot range - end 1: 100.0 PE
Plot range - end 1: 100.0 PE Limit value Max (Hi) 1: 123.0 LH
Free memory 126.1 FR Limit value Min (Lo) 1:-010.0 LL
Output mode PL 2 OM Locking mode 1: 0005 LM
Start time 10:00:00 ST Base value 1: ---- BA
End time 10:30:00 ET Factor 1: ---- FA
Start date 01.05.99 SD Exponent 1: 0 EX
End date 01.05.99 ED " Zero point correction 1: ---- ZC
" Slope (gain) correction 1: ---- SC
^ Ambient temperature 1: 250.0 AT
^ Emissivity factor 1: 0.950 EF
* Baud rate 9600 BR
* Device address 00 A
~Atmosph. pressure 1013 mb
Automatic activation of the functions by:
*interface modules ^ infrared sensors
" pH probes ~humidity, dynam. press. and O2sensors
For a data output starting from the measuring function ´MY´ the key FUNCTION
can be used to call various memory functions, which are entirely independent
ALMEMO6290-7B 18
Display and Keyboard

from those used for the recording of measuring data (see 8.6.1) if a data
memory has been integrated (option S).
The instruments can be individually configured for any application by setting
the functions of the key FUNCTION via interface (AMR-Control) (see man.
6.10.13.3). For this purpose, this key corresponds to the key F. Even the
storage of a configuration in an ALMEMOconfiguration connector is possible,
i.e. the functions can then also be activated by programming modules that
were formerly required.
The additional activated functions are cleared by operating the key CLEAR
during the switch-on.
5.3 Keyboard
The keyboard (6) has the following functions that are displayed above the keys:
Function Normal Enter
Programming of Parameters ENTER $
Selecting Measuring Points CH ▲Clr
Selecting Measuring Functions MEASURE "
Selecting Programming Functions FUNCTION #
Start and Stop of Measurements START/STOP 
Line Feed PAPER FEED !
When the key ENTER is operated a digit or an abbreviation is flashing in the
display, i.e. the instrument is in edit mode and the white designations on the
keys are valid. The keys !, "and #are then available for altering the input
figure, $, operate as cursor keys and the key Clr is available for clearing
parameter data. The input is complete, when the last digit has been confirmed
with operating the key $.
19 ALMEMO6290-7B
Display and Keyboard