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Laboratory Catalogue 2004

1st Edition

Laboratory Catalogue 2004

1st Edition

These are the fourth generation of CRISON titrators.CRISON has over 25 years’ experience in this field and knows that, for certain applications, the performance and cost of large titrator are not always justified. CRISON’s Ti-troMatics are effective and economical titration systems and are extremely useful for routine determinations.There is a TitroMatic model for every application.We have versions for both universal and specific applications.

TitroMatic 1S and 2S burettesTitroMatic burettes all have a precision mechanism which is actioned by a stepper motor.In the TitroMatic 1S, the motor stroke is subdivided into 40,000 steps and the mechanism moves the plunger of the syringe.A quick-switch electrovalve controls the in- and outlet of liquid from the syringe.

Automatic titrators, TitroMatic

In the TitroMatic 2S, the two syringes are actioned by a single mechanism. Only one reagent is dispensed: the one from the valve which has been activated.The other syringe will return the reagent to the original bottle.When the second reagent is not in frequent use, it is a good idea to free up the corresponding syringe.

Peristaltic pumps, depending on versionThese are integrated in the back panel of the TitroMatic or in a separate module, 86 90.They can either add auxiliary reagents before or during titration or draw up any remaning sample during the “automatic levelling” process.

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112 113

Laboratory Catalogue 2004

1st Edition

Laboratory Catalogue 2004

1st Edition

Main functionsTitrations:- Defined End Point (DEP).- Equivalence Point Calculation, EPC.- Reaction Study (RS).Burette calibration.

How do they perform titration?

DEP Mode, Defined End Point.The instrument adds reagent until a known and previ-ously-selected pH or mV value is attained.Reagent is added continuously. The titrator adapts the flow rate of the titrant reagent according to the area of titration, in order to attain the end point quickly.This is a rapid type of titration, frequently used in quality control applications.

EPC Mode, Equivalence Point Calculation.The user only needs to know in which area the equiva-lence point of a reaction is to be found.The titrator will add reagent quickly until the area is reached and once there will calculate exactly the equiva-lence or inflection point of the titration.This is very useful in mV titrations, e.g. argentometry, where the equivalence point is always detected in the same area but where the exact potential may vary de-pending on electrode wear.

RS Mode, Reaction Study.The instrument “studies” the behaviour of a sample dur-ing titration, so as to optimise later titration of this kind of sample.

Sample dosing without pipette: “automatic level-ling”Using a TitroMatic equipped with peristaltic pumps, either integrated or using external model 86 90, the user need no longer pipette large volumes of sample.Polypropylene vessels, of identical shape and size, are used for this.The user need only pour an approximate amount of the sample in the vessels and the levelling system will draw up any excess, adjusting the volume exactly.Reproducibility over 1%.

Fig. A. The EPC, equivalence point calculation, is 120 mV

Fig. B. The equivalence point calculation, has moved to 160 mV

EPD: the flow rate decreases as the pH comes closer to the End Point.

RS: Study of a reaction from a sample

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Titromatic 1S 1S-2B 2S 2S-2B

Elements

Syringes 1 1 2 2

Pumps - 2 - 2

…their function

One titrant ready • • • •

Two titrants ready - - • •

Double dosing of reagent - - • •

Dosing sample without pipette - • - •

Dispensing auxiliary reagents - • - •

Automatic sensors cleaning - • - •

Laboratory Catalogue 2004

1st Edition

Laboratory Catalogue 2004

1st Edition

“Universal” versionsThere are several versions, the differences among them being the elements they include. Thus:

Key features common to all TitroMatics

They can store different titration programmes

Self-test programme, for calibrating the burette in the user’s own laboratory.

Syringes: 10 ml standard. 2.5 and 5 ml optional.Versions 2S, with 2 syringes, can also be turned into a 20 ml burette, by adding 2 10-ml syringes.

Two TitroMatics can be connected to the same Sampler at the same time.

Precision pH-meter.

pH calibration with criteria for rejecting electrodes in poor condition.Re-calibration warning once the pro-grammed time is exceeded.

Backlit, liquid crystal graphic display.

Highly-functional, long-life keypad.

Connection for external PC keyboard, making it easier to add text such as report headers, sample code, users, etc.

Two RS 232 C interfaces:One bi-directional to printer or PC.Another for connection to any CRISON automatic sample changer.

Data Logger, storage of results which can be queried on screen, printed or sent to a PC at any time.Real-time clock calendar

Connectable peripherals• Sensors: pH and redox electrodes ion selective electrodes photoprobes temperature probe (Pt 1000)• Bar-code scanner• Magnetic stirrer• Separate peristaltic pump module 86 90• PC keyboard• PC or printer• Sampler or Balance

The 86 90 separate pump can be connected to all versions.

Automatic titrators, TitroMatic (continued)

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Laboratory Catalogue 2004

1st Edition

Laboratory Catalogue 2004

1st Edition

External pump module 86 90 Display examples Measurement of pH and temperature.

Calibrating pH.Second point 4.01

One of the screens, after calibration.Calibration data, second screen

Titration reagent load on fi rst start-up

During titration

End of titration

TiCom software for data capture from a PC

The automation of certain processes sometimes requires the use of one or several peristaltic pumps.The 86 90 pump can be fi tted to all versions of the TitroMatic.

Printer 82, optionalThe results obtained, programmes in memory, etc., can be printed out on a printer, see examples.

TitroMatics can be connected directly to a PC. The TiCom Programme, developed by CRISON, makes it easy to use.

For further information, please see page 130

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Technical specifications common to universal and specific TitroMatic

Non-volatile memory Up to 5 titration programs with the TitroMatic 1S. Up to 10 with the TitroMatic 2S. Burette auto-calibration program. Clock / calendar. Header texts: 2 lines x 40 characters. Name of up to 4 operators. Program comments: 8 lines x 40 characters. Up to 50 results stored in the Data Logger.

Languages English, spanish, french, italian.

Display Graphic backlit liquid crystal display, 128 x 64 dots.

Keypad Membrane, 7 keys. Protected PET material. Guaranteed for up to 6 million strokes per key.

Measuring ranges pH -2 ... 16, mV ± 2000, ºC -20 ... 150.

Resolution 0.01 pH, 1 mV, 0.1ºC.

Measuring error (±1 digit) ≤0.01 pH, ≤1 mV, ≤0.2ºC.

Reproducibility (±1 digit) ±0.01 pH, ±1 mV, ±0.1ºC.

Temperature compensation With ATC Pt 1000 probe or entering data using the keypad.

pH calibration In 1, 2 or 3 points, validity 0 h…7 days. Automatic recognition of technical buffers. pH 2.00, 4.01, 7.00, 9.21 and 10.90 (at 25ºC). Special calibration, 1 selectable point between 0…14 pH. Accepted electrode values: Slope 50... 65 mV/pH, at 25 ºC. Sensitivity 86... 110%. Asymmetry potential ± 40 mV. Rejection of defective electrodes. Expired calibration warning.

Syringe volume Standard 10 ml. Optional: 5 and 2.5

Resolution 1/40000 of the syringe volume.

Dispensing accuracy (as relative error) ≤0.2% for volumes higher than 10 % of the syringe.

Reproducibility of the dispensing ±0.1% for volumes higher than 10 % of the syringe.

Materials in contact with the liquid Syringe: glass borosilicate and PTFE. Electrovalve: PTFE and KEL-F. Tubes: PTFE.

Inputs and outputs Measuring electrode, BNC connector. Reference electrode, banana Ø 4. ATC, Pt 1000 type, telephone connector or banana Ø 4. External keyboard, miniDIN connector. RS 232C bidirectional for PC or printer, telephone connector. RS 232C, for Sampler or balance, telephone connector. Stirrer control: On/Off and speed, RCA connector External pump control, telephone connector

Power supply 24 VAC, 1.25A, 30 VA external power supply.

Electrical safety Meets EC, EN 61010.

EMC (Electromagnetic compatibility) Meets EC, EN 50081-2 and EN 50082-2.

Permitted ambient conditions Operating temperature, 10...40°C. Storage and transport temperature, –10...50°C. ≤80%, relative humidity, non condensing.

Enclosure ABS and enamelled steel.

Physical parameters Weight: 4 kg approx. Dimensions: 130 x 160 x 300 mm.

Equipment compositionCode Instrument Syringes Pumps Electrode ATC

86 50 TitroMatic 1S, universal 1 - - -

86 51 TitroMatic 1S 2B, universal 1 2 - -

86 60 TitroMatic 2S, universal 2 - - -

86 61 TitroMatic 2S 2B, universal 2 2 - -

Laboratory Catalogue 2004

1st Edition

Laboratory Catalogue 2004

1st Edition

Specifications subject to change without notice

PLUG-IN POWER SUPPLY: The instrument is supplied with a 230 VAC plug-in power supply. For 115 VAC, please specify when orderingSENSORS: “Universal” TitroMatics are supplied without sensors. Select the ones most appropriate for your application, see pages 36…ACCESSORIES: TitroMatics include a stirrer, a sensor support, electrode cable and a set of buffer and electrolyte solutions.OPTIONAL ACCESSORIES: Sampler, printer, etc. See page 127…

CertificatesSupplied with the EC Decla-ration of Conformity as per directive EMC 89/336/EC, and specifications certificate.For further information, please see page 132.

Automatic titrators, TitroMatic (continued)