Firma:              Elga

Modell:                         UHQ MK II

Kommentar:     Dokumente engl.

PRODUCT DESCRIPTION

The Elgastat UHQ (Ultra High Quality) unit has been specifically designed to meet the high purity demands of the modern analytical laboratory. Several purification techniques have been packaged into a stylish self­contained unit, designed to stand alongside modern analytical instruments.

Ultra high quality water produced by the unit is intended for use in such applications as atomic absorption, ion chromatrography, high performance liquid chromatography, fluorescence analysis and general microbiology.

Fig. 1 illustrates the main external features visible to the user. Situated behind the side covers are the water purification cartridges, and behind the front cover are the electrical circuit boards and components. For normal use, the Elgastat UHQ is connected to the water supply and electrical supply by the connections and sockets at the rear of the unit.

Consistent water quality is assured by the in-built 'process technology" with its recirculation features. Dispensing of the water is by a unique pipette type Dispense Pen, which enables fingertip control of -the liquid flow.

Briefly, within the UHQ unit there is an inlet solenoid valve which controls the flow of mains feedwater to a Reverse Osmosis (RO) Cartridge. The RO 'permeate" (partially purified water) is stored in a four litre reservoir and the contents of the reservoir are pumped by a recirculation pump through four water purification cartridges. Water quality is continuously monitored by a temperature compensated resistivity meter and the water is irradiated with short-wave radiation in a UV chamber prior to flowing through the Dispense Pen. Recirculated water returns to the reservoir via a non­return valve. The tip of the Dispense Pen remains in a well, bathed in UV radiation, during periods of non-use.

The right-hand removable cover needs to be opened every 1 -2 months (by simply undoing the 1/4 turn fasteners) in order to unclip and replace the exhausted media cartridges with new freshly regenerated/activated Elgastat cartridges. The left- _. hand removeable cover needs to be opened once a year to fit a new RO cartridge. Replacement Cartridge packs as well as spare parts, service and/or advice are available from your local Elga Distributor.

Technical Specification

Model No:                                   Elgastat UHQ II

Serial No:                                    See inside right-hand side cover or rear of unit

Reservoir Capacity:                   4 litres (nominal), 3.3 litres usable volume

Process Time:                            30 minutes (pre-set continuous recirculation)

Recirculation Feature:               10 minutes in every 60 minutes intermittent recirculation      after process time

Dispense Rate:                          Up to 0.75 litres/min water can be dispensed at any             time

Feedwater Requirement:          850 ml/min at 4 bar (60 psi) pressure

Max. Inlet Pressure:                   6 bar (90 psi)

Min. Inlet Pressure:                    2 bar (30 psi)

Feedwater Temperature:          4°C - 35°C

Permeate 'Make-Up" Rate:       75 ml/min (nominal flow rate when in refill mode) at   4 bar (60 psi) pressure

Dimensions:

Height:                                         400 mm

Width:                                          232 mm

Depth:                                          400 mm

Weight:                                        10 kg (empty)/ 14 kg (full)

Power Requirements:                220/240, 50 Hz (Standard)

                                                    110/120V (USA Standard)

                                                    60 Hz (Option)

Power Consumption:                 77 VA

Status Displays:                         LED Display of Refill (red), Process (amber), Ready           (green) and Power (green) Tank Level Indicator          (graduated) Water Quality Indicator (temperature                                                     compensated)

Safety Features:                         High Level Cut-Out in Reservoir

                                                    Low Level Cut-Out in Reservoir

                                                    Refill Inhibit during Process

UHQ Water Purity

International Standards:            ASTM, CAP, NCCLS Type 1 and BS3978 Grade 1

Inorganics:                                  18 Megohm-cm Resistivity at 25°C

Organics:                                    < 0.0001 AU at 254 nm

T.O.C.                                          < 20 ppb

Bacteria:                                     < 1 CFU/ml

Particles:                                     0.05 m m filtration