Firma:                   Merck-Hitachi

Modell:                AS 2000A

Kommentar:        Dokumente engl.

The configuration of the AS-2000 is shown below. The samples are placed in the rack. The arm moves the needle along the transverse axis (X), the longitudinal axis (Y), and

the vertical axis (Z). The needle is provided with a valve and a syringe to allow aspiration and injection of the samples. When it is used as a part of a liquid chromatograph system, samples are injected with the injection valve and all operations can be performed with the Operation keys by watching the display.

Sample Injection Methods

The AS-2000 permits two injection methods. In the Standard injection method, the needle sucks a little larger amount of the sample than the amount which will be transferred from

the injection valve to the column, and injects only the middle part of the sample by cutting both ends of the sample. This method is called the cut injection method. On the other hand, when the amount of a sample is Small, the sample sucked with the needle is fully transferred into the sample loop and into the column.

This method is called the all volume injection method.

SPECIFICATIONS

(1) Standard number of Samples     : 50

(2) Rack/Sample Vial                        : Conditions can be set to match the Sample vial and rack

                                                           shape

(3) Syringe Capacity                         : 0.5 ml

(4) Sample injection Volume            : 0.5-400 µl (100 µl in a Standard furnished loop)

(5) Syringe Speed                             : Can be set in 5 steps

(6) Injection Volume                          : CV 0.5% maximum (peak area at Reproducibility 10 µl

                                                           injection. According to the analyzing conditions in 6.2.1.)

(7) Injection Valve                             : 6 way control valve

(8) Pressure Resistance                  : 34 MPa (350 kgf/cm ² )

(9) Wetted Section Material              : Stainless steel SUS 316, tetrafluoroethylene resin,

                                                           PEEK* (Poly Ether Ether Ketone), borosilicate glass

                                                           (*acetone or conc sulfuric acid is unusable.)

(10) Display Section                         : LCD (40 columns X 2 lines)

(11) Control Method                          : (i) LC sequential injection function

                                                           (ii) External control by Computer through RS-232C

(12) Data Store                                 : Battery- backed- up memory

(13) Number of Injection Times

        per Sample                               : Up to 99

(14) Analyzing Time                          : Up to 999.9 minutes

(15) Communicating Function          : RS-232C, PAN (Network for Hitachi's LC)

(16) Input Terminal                           : Photocoupler input: 3 bits

(17) Output Terminal                        : Relay contact output: 3 bits

(18) Ambient Temperature               : 15- 35°C

(19) Ambient Humidity                      : 45-85%

(20) Source Voltage                         : 100, 115 220, 230, 240V+10% (Applied voltage setting

                                                           is changed within the Instrument)

(21) Source Frequency                    : 50/60 Hz

(22) Power Consumption                 : 150 VA

(23) Dimensions                               : 260 width X 500 depth X 210 height mm

                                                           (Excluding protruding portion)

(24) Weight                                       : Approximately 15 kg