Consort Z621 User manual

CONSORT
MANUAL
HANDLEIDING
MODE D’EMPLOI
ANLEITUNG
Z621
January 1997

Table of contents
Introduction ................................. 1
Manufacturer ............................... 1
Warranty .................................... 1
Servicing .................................... 1
Specifications .............................. 2
Keyboard .................................... 2
Error codes ................................. 3
SET-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Beeper ...................................... 3
Alarm ........................................ 3
Printer ....................................... 4
Identification number ...................... 4
Secret code ................................ 4
DATA-ACQUISITION ......................... 4
Logging data ............................... 5
Adding data ................................ 5
Recalling data .............................. 5
Printing data ................................ 6
Inputs ........................................ 6
MEASUREMENTS ........................... 6
Theory ....................................... 6
Maintenance ............................... 7
Measurements
with 1-point calibration ................ 7
with 2-point calibration ................ 8
Relative measurement .................... 9
Temperature measurement .............. 9
DATA COMMUNICATION .................... 9
Recorder output ........................... 9
GLP-protocol ............................... 9
Digital output ............................... 10
Printer connection ......................... 11
Computer connection ..................... 11
TROUBLE SHOOTING ...................... 12
Calibrate .................................... 12
Reset ........................................ 12
Inhoudsopgave
Inleiding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Fabrikant .................................... 13
Waarborg ................................... 13
Onderhoud ................................. 13
Specificaties ................................ 14
Toetsenbord ................................ 14
Foutmeldingen ............................. 15
INSTELLEN .................................... 15
Zoemer ...................................... 15
Alarm ........................................ 15
Afdrukken ................................... 16
Identificatie ................................. 16
Kode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
METINGEN OPSLAAN ...................... 16
Gegevens opslaan ........................ 17
Gegevens toevoegen ..................... 17
Gegevens oproepen ...................... 17
Gegevens afdrukken ...................... 18
Ingangen .................................... 18
METING ........................................ 18
Theorie ...................................... 18
Onderhoud ................................. 19
Meten
met 1-punts ijking ...................... 19
met 2-punts ijking ...................... 20
Relatieve meting ........................... 21
Temperatuur meting ....................... 21
GEGEVENS-UITWISSELING ............... 21
Analoge uitgang ........................... 21
GLP-protocol ............................... 21
Digitale uitgang ............................ 22
Verbinden met printer ..................... 23
Verbinden met computer ................. 23
FOUTEN ONDERZOEK ..................... 24
Afregelen ................................... 24
Herzetten ................................... 24
ii

Table de matières
Préface ...................................... 25
Fabricant .................................... 25
Garantie ..................................... 25
Service ...................................... 25
Spécifications .............................. 26
Le clavier ................................... 26
Code d’erreur .............................. 27
INSTALLATION ................................ 27
Signal acoustique ......................... 27
Alarme ...................................... 27
Imprimante ................................. 28
Numéro d’identification ................... 28
Code personnel ............................ 28
COLLECTEUR DE DONNEES ............. 28
Mémoriser des données ................. 29
Ajouter des données ...................... 29
Afficher des données ..................... 29
Imprimer .................................... 30
Branchement ............................... 30
MESURES ..................................... 30
Théorie ...................................... 30
Entretien .................................... 31
Mesure
avec étalonnage sur 1 point .......... 31
avec étalonnage sur 2 points ........ 32
Mesure relative en O2. . . . . . . . . . . . . . . . . . . . 33
La mesure de température .............. 33
TRANSFERT DE DONNEES ............... 33
Sortie analogique .......................... 33
Protocole GLP ............................. 33
Sortie numérique .......................... 34
Imprimante ................................. 35
Ordinateur .................................. 35
DIAGNOSTIC .................................. 36
Calibrage ................................... 36
Remise en état ............................. 36
Inhaltsverzeichnis
Einführung .................................. 37
Hersteller ................................... 37
Garantie ..................................... 37
Service ...................................... 37
Technische Daten ......................... 38
Bedienungsfeld ............................ 38
Fehlermeldungen .......................... 39
EINSTELLUNG ................................ 39
Summer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Alarm ........................................ 39
Drucker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Identifikation ................................ 40
Code ......................................... 40
DATENVERARBEITUNG .................... 40
Daten speichern ........................... 41
Daten zufügen ............................. 41
Daten auflisten ............................. 41
Daten ausdrucken ......................... 42
Eingänge .................................... 42
MESSUNG ..................................... 42
Theorie ...................................... 42
Lagerung .................................... 43
Messung
mit 1-punkt Eichung ................... 43
mit 2-punkt Eichung ................... 44
Relative O2-Messung ..................... 45
Temperatur Messung ..................... 45
DATEN-AUSTAUSCH ......................... 45
Analogausgang ............................ 45
GLP-protokoll .............................. 45
Digitalausgang ............................. 46
Druckeranschluß .......................... 47
Datenübertragung ......................... 47
FEHLERFUNKTIONEN ...................... 48
Eichung ..................................... 48
Wiedereinstellen ........................... 48
iii

1
This instrument is manufactured with the latest technology and needs no
particular maitenance. CONSORT certifies that this instrument was
thoroughly inspected and tested at the factory prior to shipment and found
to meet all requirements defined by contract under which it is furnished.
However, dimensions and other physical characteristics may differ.
The normal operating temperature should be between 4° and 40°C. Never
store the instrument in a room with high humidity or at very low
temperatures (condensation water!).
If it is equipped with rechargeable batteries, the instrument should be
connected permanently to the mains in order to keep the batteries in good
condition. Do not store the instrument for longer than 1 month without
recharging the batteries. The batteries can be replaced by opening the
bottom compartment of the cabinet.
Introduction
Manufacturer
Warranty
Servicing
This instrument (excluding all accessories) is warranted against defective
material and workmanship for a period of thirty-six (36) months from the
date of shipment ex factory. CONSORT will repair all defective equipment
returned to it during the warranty period without charge, provided the
equipment has been used under normal laboratory conditions and in
accordance with the operating limitations and maintenance procedures in
this instruction manual and when not having been subject to accident,
alteration, misuse or abuse. A return authorisation must be obtained from
CONSORT before returning any product for warranty repair on a freight
prepaid basis!
CONSORT is not liable for consequential damages arising out of the use
or handling of its products.
In the event of this instrument being returned for servicing, the owner is
requested to remove the power supply lead and NOT to send the following
items unless they are suspect:
Manual
Cables
Accessories
If serious malfunctioning occurs, stop using the unit immediately and
consult your local CONSORT dealer.
CONSORT nv
Parklaan 36 Tel (++32)(14)41 12 79
B2300 Turnhout Fax (++32)(14)42 91 79
Belgium

2
Ranges O20 ... 60 ppm
Saturation 0 ... 600 %
°C 0 ... 50°C
Accuracy 0.01 ppm/ 0.1 %/ 0.1°C or 1% of reading
Inputs BNC + BANANA input for oxygen electrode
Temp. comp. automatic with NTC (100 kΩ), built-in O2-probe
Digital output programmable RS232, 2400 b/s, for bi-directional
communication with a computer or printer
Analogue output 0 ... 2 V, ca 8 kΩ, 8 bit D/A
Display 8 digit/character, 12 mm LCD display, shows
readings, °C & messages
Keys 10 tactile membrane keys
Ambient temp. 4 ... 40°C
Rel. Humidity 0 ... 90 % (non-condensing!)
Power supply 210-250 V~ (* 105-125 V~), 50/60 Hz, max. 2 VA, &
4 NiCd batteries, size AA
Cabinet IP65 cabinet
Dimensions 252 x 121 x 50 mm
Weight 600 g
Specifications
Each time the instrument is switched on, it will check briefly its internal
calibrations while showing all functions of the display and the software-
version. An error message appears when something is wrong.
MODE = Selects all modes (except temperature) or escapes from
error traps, calibration procedures..., by returning to the
original mode.
°C = Reads temperature.
¿/À= Button for entering a value or for selecting a function.
CAL = Starts or proceeds a calibration or function.
HOLD = Holds the display when measuring.
RES = Changes the resolution of the display.
PRINT = Displayed value is printed through the RS232 output.
ON/OFF = Switches the instument on or off.
Keyboard

3
[Or.PPM] = Overrange ppm (e.g. defective electrode).
[Or.%] = Overrange % (e.g. defective electrode).
[Or.°C] = Overrange °C (measured degrees out of range).
[no dAtA] = Data-logging memory empty.
[not.CAL] = Calibration procedure interrupted (the previous calibration
remains valid!).
[Err.°C] = Temperature probe not connected.
[Err.Prb] = Zero-point too large (e.g. defective membrane).
[Err.Stb] = Electrode not stable during a calibration.
[Err.CAL] = Calibration error (check electrode & standard solutions).
[Err.COM] = General communication error.
[Err.Prt] = Communication error with the attached printer.
[Err.bAt] = Battery charger defective (disconnect the AC-cord
immediately from the mains, remove the batteries and have
your instrument serviced!)
[Err.MEM] = Fatal memory error (all factory settings are cleared. Have
your instrument serviced!).
[ILLEGAL] = An unauthorised person has failed to repair the unit.
Warranty is elapsed from now on!
Error codes
SET-UP
The built-in beeper can be programmed to sound each time a key-path
is pressed.
Beeper
1. Select the set-up procedure by pressing MODE.
2. Press CAL until you can choose with ¿or Àbetween [bEEP on] or
[bEEP OFF]. Decide whether or not the beeper should sound each
time the keyboard is touched.
3. Press CAL to continue or press MODE to cancel.
An audible alert can be given when the displayed values stray outside a
programmable high- and low-level.
Alarm
1. Select the set-up procedure by pressing MODE.
2. Press CAL until you can choose with ¿or Àbetween [ALrM OFF],
[ALrM PPM] or [ALrM %]. Select [ALrM OFF] if no alarm is required.
Press CAL.
3. The display shows e.g. [L=4.00PPM] or [L=60.0%]. Select the desired
minimum level with ¿or Àand press CAL. Each time the
measurements are below this level, the beeper will sound an alarm.
4. The display shows e.g. [H=6.00PPM] or [H=80.0%]. Select the
desired maximum level with ¿or À. Each time the measurements
are above this level, the beeper will sound an alarm.
5. Press CAL to continue or press MODE to cancel.

4
[no LOG] : No data-logging.
[SEt LOG] : Permits to pre-set the data-logging parameters.
[LSt LOG] : Permits to view the stored values on the display.
[Prt LOG] : Permits to send the stored values to a printer or computer.
[Cnt LOG] : Permits to continue with a next series of measurements,
without erasing the previous data-logging.
Up to 100 values can be stored in the non-volatile memory of the
instrument.
The measured values can be printed automatically at timed intervals or
manually on operator command.
Printer
1. Select the set-up procedure by pressing MODE.
2. Press CAL until the display shows e.g. [Pt=120]. Select the desired
time interval (0...9999 s) between the transmitted data to a printer,
with ¿or À. Pre-set to zero if no automatic printing is required.
3. Press CAL to continue or press MODE to cancel.
The instrument can be identified by e.g. a computer when a specific
number is allocated to it.
Identification
number
Secret code
A private code can be programmed to avoid undesired access to the
instrument.
1. Select the set-up procedure by pressing MODE.
2. Press CAL until the display shows [Code on], [Code OFF], or [Code
CAL]. Decide, with ¿or À, whether the access to all future
calibrations should be by entering a code (on) or not (off). Press CAL
to continue or press MODE to cancel. Select [Code CAL] to enter
your personal code.
3. The display shows [E=-----] while [=] is blinking. Enter your secret
sequence of 5 keys to proceed. Press CAL to continue or press
MODE to cancel.
1. Select the set-up procedure by pressing MODE.
2. Press CAL until the display shows e.g. [Id.no=5]. Select the desired
identification number (0...999) for your meter with ¿or À. Pre-set to
zero if this number should not be mentioned while printing.
3. Press CAL to continue or press MODE to cancel.
DATA-ACQUISITION

5
[Lst LOG]: permits to view the stored values on the display.
1. Select the set-up procedure by pressing MODE and press CAL.
2. Select [Lst LOG] with ¿or Àand press CAL
3. The display shows the first data-logged value in memory (a blinking
[n] appears). Press ¿or Àto view all other values.
4. While pressing HOLD the corresponding date is shown (not relevant
when a manual or continued data-logging has been performed).
5. While pressing RES the corresponding time shown (or: series + log-
number, e.g. [2-017], when a continued data-logging has been
performed).
6. While pressing °C the corresponding temperature is shown.
7. Press PRINT to send the recalled data to a printer.
8. Press MODE to return to cancel.
Recalling data
[Cnt LOG]: Permits to continue with a next series of measurements,
without erasing the previous data-logging
1. Select the set-up procedure by pressing MODE and press CAL.
2. Select [Cnt LOG] with ¿or Àto continue with a next series of
measurements, without erasing the previous data-logging, provided
the memory has enough capacity left and press CAL.
Adding data
Set log: Procedure to pre-set the data-logging parameters.
1. Select the set-up procedure by pressing MODE and press CAL.
2. Choose [SEt LOG] with ¿or À. Select [no LOG] if no data-logging is
required and press MODE to return to the original mode.
3. Press CAL untill you can choose with ¿or Àbetween [LOG PPM]
or [LOG %]. Select the desired mode and press CAL.
4. The display shows e.g. [dt=100]. Select the desired time interval
(0...9999 s) between the data-logging, with ¿or Àand press CAL.
Pre-set to zero for manual data-logging, each time PRINT is pressed
(the next points 5 to 7 are skipped and press CAL).
5. The display shows e.g. [n=40]. Select the desired number of values
(1...100) to be data-logged with ¿or Àand press CAL.
6. The display shows e.g. [d=31.12.91] while the year is blinking.
Program the desired starting date with ¿or Àand press CAL.
Program similarly the month and the day.
7. The display shows e.g. [t=23.59] while the minutes are blinking.
Program the desired starting time with ¿or Àand press CAL.
Program similarly the hours.
8. The display shows [StArt ?]. Press CAL to start the data-logging
according the previous settings (a blinking [L] appears) or press
MODE to cancel. After the last value has been catalogued the display
will show [End LOG]. When manual data-logging has been selected,
press PRINT to put a next measurement into memory. In the
meantime the display shows the logging-number e.g. [LOG 7]. Press
MODE to cancel.
Logging data

[Prt LOG]: Permits to send the stored values to a printer or computer.
1. Select the set-up procedure by pressing MODE and press CAL.
2. Choose [Prt LOG] with ¿or Àand press CAL
3. The display shows [PrintinG] while all data-logged values, including
corresponding dates and times, are sent to the RS232 output in the
following format, compatible with EXCEL™, LOTUS 123™,... The
columns are separated by a TAB character.
6
Printing data
MEASUREMENTS
The measuring electrode should be connected to the coaxial INPUT
connector. Its banana plugs should be inserted in the °C terminals.
Inputs
Theory
Principle:
The oxygenmeter and its electrode function according to the Clark
principle with platinum as cathode and silver as anode in an electrolyte
cell to which a polarisation voltage of 800 mV is applied. Oxygen gas
present in the electrolyte is reduced to OH ions at the platinum cathode.
The resulting current is diffusion limited and therefore proportional to the
oxygen concentration in the sample solution. This current is amplified,
corrected, and displayed in mg/l, ppm or % dissolved oxygen.
Electrode:
The anode and cathode of the electrode are immersed in a special buffer
solution inside the electrode, to give high stability readings and short
polarisation times. The electrolyte compartment is separated by a PTFE
film from the sample solution. Only gases, but no ions, can diffuse through
this film from the sample solution into the internal electrolyte.
Temperature compensation:
Speed of electrode reactions depends on temperature. Therefore, for a
given oxygen concentration, the electrode current becomes greater at
higher temperature, and conversely. This temperature effect is
compensated with the NTC resistor incorporated in the electrode. For
aqueous solutions the oxygen meter therefore always gives correct
readings in ppm, independent of the actual temperature.
Log# VALUE UNIT C H D
001 7.34 ppm 23.7 13:19:57 29/01/95
002 7.21 ppm 23.7 13:20:57 29/01/95
003 7.08 ppm 23.8 13:21:57 29/01/95
004 6.71 ppm 23.8 13:22:57 29/01/95
005 6.49 ppm 23.9 13:23:57 29/01/95

7
Interferences:
All substances which can diffuse through the membrane and for which
800 mV potential suffices for polarographic reduction, will be reduced in
the electrode. This will give a corresponding current contribution, if they
are present. Interference can be caused by ions entering the electrode
through porous or mechanically damaged membranes and by diffusion of
other reactive gases apart from oxygen, e.g. CO2, Cl2, SO2, and H2S.
These substances react in undesired manner with the electrode.
Acidic or basic gases change the pH value of the electrolyte solution and
thus disturb the reading, particularly when measuring small oxygen
concentrations. High salt concentrations in the sample solution can falsify
readings too.
Always store the electrode in distilled water after use! The membrane may
cease to function correctly after prolonged use or mechanical damage.
This will falsify the readings and the electrolyte may drain out. To replace
the membrane (see page 49), unscrew the measuring head and dismantle
it further to remove the old membrane. Take a new membrane and mount
it carefully, fill the measuring head with electrolyte solution, and then
slowly screw it onto the electrode. The electrode is now ready for use
again.
The electrode body consisting of the electrode shaft and the plug head
has almost unlimited life and requires no maintenance. After prolonged
use of the electrode in solutions containing high concentrations of oxygen,
the silver anode may become deactivated by undesired deposits. An
indication is that the electrode no longer responds correctly to calibration.
In this case, screw off the measuring head and cautiously remove the
precipitated deposits from the silver electrode surface with the aid of filter
paper. The electrode is then ready again for operation after refilling the
measurement head with new electrolyte solution.
Maintenance
Measurements
with 1-point
calibration
Start this method only with a well polarised electrode!
1. Before making measurements, check that the membrane is
undamaged and that there are no gas bubbles present in the
electrolyte space.
2. Connect the electrode and switch the instrument on. After a few
minutes, the electrode is polarised and ready for making
measurements.
3. Select the ppm (mg/l) or % range by pressing MODE. The display will
immediately show the measured oxygen according to the previous
calibration. Should you want to restandardise, press CAL.
4. The display shows the salinity correction, e.g. [SAL=2.1%]. Leave this
value to zero unless you are going to measure in heavily salted
solutions such as e.g. sea-water (3.5%). Pre-set the proper value with
¿or Àand press CAL or MODE to cancel.
5. The display shows the pressure correction, e.g. [P=1023hP]. Pre-set
the actual air pressure (hP) with ¿or Àand press CAL or MODE to
cancel.
6. Press ¿or Àuntil the display shows [1.Point]. Press CAL to start the
calibration procedure.