Firma:                Merck-Hitachi

Modell:              L-6200

Kommentar:      Dokumente engl.

The Model L-6200 is an intelligent pump which plays a major role in the Hitachi high speed liquid chromatography system. Its functions are detailed below.

Front View of Model L-6200 Intelligent Pump

The Model L-6200 Intelligent Pump is included in the Hitachi high Speed liquid chromatography system and has a controlling function.

The liquid chromatography system is available in three types. This manual gives Information an assembly and Operation of each type of system.

Type of Liquid chromatography System

Manual Pump System

The Model L-6200 is used as a single function pump like the Model L-6000.

Low Pressure Gradient System

The eluents are mixed before being pressurized by the pump. Accordingly this mixing method is called a "low pressure gradient elution". , It employs a proportioning valve for changing over the three eluent flow paths.

High Pressure Gradient System

The eluents are mixed after being pressurized by the pump. Accordingly this mixing method is called a "high pressure gradient elution". It uses two or three pumps for pressuriz­ing each eluent independently.

SPECIFICATIONS

Pump Unit

(1) Liquid feed System                            Dual plunger type reciprocating pump

(2) Maximum discharge pressure           400 kgf/cm ²

(3) Discharge rate range                         1 to 9999 µl/min (in increments of 1 µl,/min)

(4) Flow rate setting                                 Ten-key input

(5) Pressure display                                       Digital display (unit selectable among bar, psi, kgf/cm ² and MPa)

(6) Pressure limit                                     0 to 412 bar, 0 to 5983 psi,

                                                                0 to 420 kgf/cm ² , 0 to 41.2 MPa

(7) Discharge volume of                          100 µl/stroke cylinder no.1

(8) Flow rate setting                                 ±2 µl/min

accuracy (at constant                              (10 to 100 µl/min at 5 to 400 kgf/cm ² )

room temperature of 20°C                     

for distilled water)                                    ±2 % (101 to 5000 µl/min at 5 to 400 kgf/cm ² )

                                                                ±2 % (5001 to 9999 µl,/min at 5 to 20 kgf/cm ² )

+2 % to -0.1P % where P devotes discharge pressure in kgf/cm ²

(5001 to 9999 µl/min at 21 to 400 kgf/cm ² )

(9) Flow rate stability                               ±0.3 % (10 to 5000 µl/min,

(at constant room                                    5 to 400 kgf/cm ² )

temperature of 20°C for

distilled water)                                          ±1.0 % (5001 to 9999 µl/min,5 to 400 kgf/cm ² )

(10) Compensation of solvent                 Automatic compensator built in

compression ratio

(11) Pressure display accuracy:            ±5 %

(12) constant pressure liquid feed           20 to 400 kgf/cm ² (for column packing)

(13) Material of wetted parts                           SUS 316, rubby, sapphire and teflon containing carbon

Gradient System

A. Low Pressure Gradient System

(1) Number of eluents                              Up to 3 eluents

                                                                (4 eluents with ACC pump)

(2) Mixing                                                 Valve-time control

(3) Mixing ratio range                               0 to 100 %

                                                                (in increments of 1%)

(4) Flow rate range                                  1 to 9999 µl/min in increments of 1 µl/min

The guaranteed range for gradient elution analysis is 0.3 to 3 ml/min

(5) Pressure limit                                     0 to 412 bar, 0 to 5983 psi,

                                                                0 to 420 kgf /cm ² , 0 to 41.2 MPa

(6) Gradient elution profile                       Linear/multi-step

(7) Number of programming                    100 steps max. per program

steps                                                        100 steps max. for total of 9 programs

(8) Programming time                             Up to 600 min

                                                                (in increments of 0.1 min)

(9) Programming items                           1) B/C mixing ratio

                                                                2) Flow rate (main pump and ACC pump)

3) Wavelength (when L-3000 is connected via PAN interface)

                                                                4) Timer (marker) output

                                                                5) Pump stop, buzzer

(10) Number of programs                        9

(11) Display                                             Liquid crystal

                                                                (80 characters/2 lines)

(12) Contents of display                          1) Input parameters

                                                                2) Monitor

(time progress, mixing ratio, flow rate, pressure, timen, etc.)

High Pressure Gradient System

(1) Number of eluents                              2 or 3 eluents (with L-6000 combined)

(2) Mixing                                                 Double or triele pump flow rate control

(3) Mixing ratio range                               a) With L-6000 combined 0 to 100 %

                                                                b) With 655A-12 combined 0 to 100 %

                                                                c) With 655A-11 combined

                                                                10 to 90 % (in increments of 1 %, at 1 ml/min)

(4) Flow rate range                                  a) 1 to 9999 µl/min (in increments of 1 µl/min)

                                                                (with L-6000 combined)

                                                                b) 1 to 9990 µl/min (in increments of 1 µl/min)

                                                                (with 655A-12 combined)

                                                                c) 10 to 9900 µl/min (in increments of 10 µl/min)

                                                                (with 655A-11 combined)

(5) Guaranteed range for                         a) 0.3 to 3.0 ml/min

gradient elution analysis

                                                                b) 0.05 to 0.3 ml/min (when used as semi-micro LC)

(6) Pressure limit                                     0 to 412 bar, 0 to 5983 psi,

                                                                0 to 420 kg/cm ² , 0 to 41.2 MPa

(7) Gradient elution profile                       Linear/multi-step

(8) Number of programming steps          100 steps max. per program

                                                                100 steps max. for total of 9 programs

(9) Programming time                             Up to 600 min

                                                                (in increments of 0.1 min)

(10) Programming items                         1) Mixing ratio of eluent B or eluents B and C

                                                                2) Flow rate

3) Wavelength (when L-3000 is connected via PAN Interface)

                                                                4) Timer (marker) Output

                                                                5) Pump stop, buzzer

(11) Number of programs                        9

(12) Display                                             Liquid crystal

                                                                (80 characters/2 lines)

(13) Contents of display                          1) Input parameters

                                                                2) Monitor

(time progress, mixing ratio, flow rate, pressure, timer, etc.)

Other Common Items

(1) Contact input/output terminals           Output: 1 Busy, 2 Start, 3 Stop

                                                                Input:     1 Busy, 2 All Stop, 3 Start, 4 Local/Remote

(2) External communication                    PAN and RS-232C possible

(3) Timer or timer output                         8 contacts

(4) Specification of pump                        1 Manual pump mode

control mode                                            2 Low pressure gradient mode

                                                                3 High pressure gradient mode

                                                                4 Column packing mode

(5) Specification of pressure                   Bar, psi, kgf/cm ² or MPa unit

(6) Pressure zero adjustment                 Possible

Operating Conditions, Dimensions and Weight

(1) Power supply                                     100 to 115 V or 200 to 240 V AC, 50/60 Hz

100 or 200 V System is selected via the external switch at rear panel of main unit.

(2) Power consumption                           Approx. 110 VA

(3) Ambient temperature                         15 to 35°C

(4) Humidity                                             45 to 85 % RH

(5) Dimensions                                               260(W) x 210(H) x 400(D) mm (protrusions not included)

(6) Weight                                                Approx. 14 kg