Enviro ST1 Operating Instructions Manual
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Enviro ST1 Operating Instructions Manual

Enviro ST1 Operating Instructions Manual

Safety weighing enclosure
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ST1 Safety Weighing Enclosure
Operating instructions

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  • Page 1 ST1 Safety Weighing Enclosure Operating instructions...
  • Page 2 Imprint These operating instructions are original operating instructions. The operating instructions should be read carefully and followed. The basic prerequisite for safe handling and trouble- free operation of the equipment is knowledge of the safety regulations and observance of danger and warning notices. If the safety weighing enclosure or installed accessories are to be used in a way not intended by the manufacturer, please contact us in advance so that we can assess the risks involved.

  • Page 3: Table Of Contents

    Printer table (option) ............................. 24 Connection to the building's ventilation system via draught diverter ............25 Special safety instructions ........................... 26 Instructions for working with ST1 safety weighing enclosures ............. 28 Filter units ..............................29 Filter change (only by qualified personnel)....................30 HEPA filter ..............................
  • Page 4 Troubleshooting ............................60 Customer service ............................61 Dismantling by a1-envirosciences ....................... 62 Dismantling on your own initiative ....................... 62 Technical data for ST1 series safety weighing enclosures ................. 63 Information for delivery and packaging ....................... 63 Materials ................................ 63 Dimensions ..............................64 Constand Air Volume (CAV) ...........................

  • Page 5: Explanation Of Symbols

    Information for the user Explanation of symbols Warnings Please read these operating instructions carefully. We want to ensure that you use our safety weighing enclosures effectively without suffering any damage to your health. Observing our warnings will also ensure that you can use this product for as long as possible. Explanation of symbols of warnings concerning personal injury: Danger Indicates a dangerous situation where there is an immediate danger to life or...

  • Page 6: General Information On Safety

    General information on safety The equipment complies with the fundamental health and safety requirements for laboratory equipment. These have been taken into account accordingly in the design and construction of the equipment. The equipment is built in accordance with the legal regulations, directives and recognised standards applicable at the time it is placed on the market.

  • Page 7: Information For Safe Operation

    Regulations for safe use  Safety devices must not be switched off or overridden. The equipment must not be modified or converted without the written consent of the manufacturer.  The equipment must only be used in enclosed rooms designed for this purpose. ...

  • Page 8: Safety Instructions For Installation, Operation, Modification And Malfunctions

     These instructions assume that the user is familiar with all relevant directives, the regulations "Safe working in laboratories" and working on technical equipment.  The ST1 weighing enclosure may only be operated by trained personnel with the necessary basic technical knowledge.
  • Page 9 Basically, the discharge electrodes are safe to touch. This means that touching the metal tips of the discharge electrodes will not cause electric shock. Warning of contamination risks Substances as well as auxiliary and operating materials could cause damage to health or the environment in the event of contact. ...
  • Page 10 Highly variable or excessive ambient temperatures can cause condensation of water in the filter unit or overheating.  Operate the ST1 safety weighing enclosure at as constant an ambient temperature as possible in the range of 5 to 40°C to avoid damage from condensing water or overheating.

  • Page 11: Instructions For Safe Maintenance, Servicing, Troubleshooting

     Check loosened screw connections for tightness.  After completion of the maintenance work, safety devices must be checked for their function. Main features Figure 1 - ST1-1200 safety weighing enclosure Division: 11 I 77...
  • Page 12 People and the environment are effectively protected from contamination when the equipment is used as intended. The ST1 safety weighing enclosures are to be understood as a system with an integrated extraction system as a closed design, as the leakage of hazardous substances into the air of the room outside the weighing enclosure is prevented.
  • Page 13 The ST1 safety weighing enclosures may only be installed and operated in an area in which an explosive atmosphere is never present as a mixture of air and flammable gases, vapours or aerosols or in the form of a cloud of combustible dust contained in the air (non-ATEX zone according to EC Directive 94/9/EC).

  • Page 14: Unpacking

    Risk of injury - Caution: heavy weight The ST1 safety weighing enclosure weighs 30-90 kg. There is a risk of injury when lifting.  It must be moved by two persons or by means of a lifting tool.

  • Page 15: Location Selection

     The front of the ST1 weighing enclosure must be as close as possible to the weighing table so that the arm bar protrudes slightly to allow good airflow to the flow sensors (not required for IE series).

  • Page 16: Installation By A1-Envirosciences

    The installation location can be under or above the enclosure or on the side. The filter unit must not be installed upside down. The hose connections to the filter unit should not come in contact with the ST1 safety weighing enclosure (vibration transmission and thus impairment of the scale functionality).
  • Page 17 HEPA filter must be checked. For this purpose, a DOP test (Dispersed Oil Particulate) is carried out. If a DOP test is not carried out, the functionality of the ST1 safety weighing enclosure cannot be guaranteed and there could be a significant risk of contamination.

  • Page 18: Functional Description

     Work according to GLP regulations. The aim is to virtually eliminate the user's exposure to hazards. The design of the ST1 series safety weighing enclosures guarantees highly effective extraction as the hazardous substances remain within the detection area. The leakage of hazardous substances into the ambient air of the ST1 safety weighing enclosure is virtually eliminated.
  • Page 19 Unique to the ST1 series safety weighing enclosures is the monitoring of the air flow with a separate sensor on the outside of the work opening. In contrast to other systems where the air flow is only measured in the exhaust air pipe, the ST1 safety weighing enclosure allows the current conditions to be measured at the working opening.

  • Page 20: St1 Safety Weighing Enclosure Structure

    (see appendix E) ST1 safety weighing enclosure structure The standard system consists of the ST1 safety weighing enclosure, the ventilation kit and a filter unit with HEPA filter. The HEPA filter used allows the air to be returned to the room or the in-house exhaust system to be connected via a draught diverter.

  • Page 21: Options

    System dimensions Figure 3 - ST1 safety weighing enclosure shown on a granite table (left), on a stainless steel table (middle) and as a stand-alone solution (right) The ST1 series safety weighing enclosures are available in three different widths. The exact inner and outer dimensions can be found in the following tables.

  • Page 22: System Configurations And Accessories

    System configurations and accessories The standard system consists of  The ST1 weighing enclosure;  The ventilation kit;  A filter unit with HEPA filter. Inlet Outlet Optionally, the system can be supplemented with further components. System with two-layer HEPA filter (option) A filter housing with a two-layer HEPA filter can also be used as a redundancy when handling hazardous substances that require critical evaluation.

  • Page 23: Filter Unit With Silencer (Option)

    It also serves as sound absorption. The filter has a retention capacity of approx. 0.5 kg of solvent vapours. The connection is made at the air outlet of the filter unit with HEPA filter. Figure 6 - ST1-0900 with filtration unit (right) and carbon filter (left) Division:...

  • Page 24: Electrostatic Discharge Systems (Options)

    Printer table (option) An additional storage surface, e.g. for a scale printer, can optionally be attached to the ST1 safety weighing enclosure. It can be attached to either the left or right side wall of the safety weighing enclosure. The printer table can be combined with the safetech waste bag system on both sides.

  • Page 25: Connection To The Building's Ventilation System Via Draught Diverter

    Connection to the building's ventilation system via draught diverter Warning of contamination risks Connecting the ST1 weighing enclosure directly to the building's ventilation system could possibly lead to destabilisation of the scale and contamination due to fluctuating exhaust air flows. Any back pressure that may occur, for example due to closing fire dampers in the building's ventilation system, could lead to significant contamination.

  • Page 26: Special Safety Instructions

    Special safety instructions Limits of product and personal protection The ST1 safety weighing enclosure is designed for personal protection. A hazard assessment and risk analysis are necessary to ensure the suitability of the safety weighing enclosure for personal protection. We are happy to support you in this.
  • Page 27  In case of malfunctions, please observe the instructions in the chapter "Behaviour in case of malfunction".  Do not continue to use the ST1 safety weighing enclosure and disconnect the mains cable from the equipment until the repair has been carried out by qualified service personnel to prevent possible danger to persons from accidental use.

  • Page 28: Instructions For Working With St1 Safety Weighing Enclosures

    Instructions for working with ST1 safety weighing enclosures a) Work must only be carried out with the system running Work on the ST1 safety weighing enclosure must only be carried out when the filter housing ventilation is active. After approx. 3 minutes, a safe working condition is achieved and it is possible to work with hazardous substances.

  • Page 29: Filter Units

    (3) through the e-box (2). Once set, this ensures that the required inflow velocity is maintained (CAV = Constant Air Volume). Figure 10 - Schematic representation of the installed peripheral equipment on an ST1 safety weighing enclosure Division:...

  • Page 30: Filter Change (Only By Qualified Personnel)

    Figure 11 - Display on the filtration unit The keypads (1), (2) and (3) are locked in normal operation and are only to be used under certain conditions. The display (A) shows the total running time of the filtration unit so far. Under certain circumstances, the volumetric flow rate is briefly displayed here in percent, e.g.

  • Page 31: Hepa Filter

    HEPA filter Figure 12 - HEPA filter (one layer) Figure 13 - HEPA filter (two layers) The HEPA filter (high-efficiency particulate air filter) is used to retain solid exposures and aerosols. The H14 HEPA filters used have a retention rate of 99.995%. They are factory certified according to ISO ISO/EN 1822 and come with individual certificates.

  • Page 32: Alarm System

    If the alarm system is switched off, the inflow velocity is not monitored and there is a risk of contamination.  The ST1 safety weighing enclosure must not be used if the alarm system is switched off. Risk of contamination in case of malfunction of the alarm system...
  • Page 33 2. Electronics box 3. Sensor Figure 15 - Individual presentation of the alarm system components for ST1 safety weighing enclosures The display (A) is centred on the top of the safety weighing enclosure (B). In the standard version, the electronics box (C) is mounted at the rear of the stainless steel frame of the enclosure.
  • Page 34 The supplied sensor (a) is mounted on the right side below the arm bar (b) and can measure and monitor the incoming air velocity directly at the opening of the enclosure. Figure 17 - Position of the sensor for monitoring the flow at ST1 safety weighing enclosures The following additional components are operated via the alarm system: ...

  • Page 35: Switching On The Alarm System

    Switching on the alarm system The alarm system is switched on at the main switch (I) of the electronics box. It is located at the rear of the safety weighing enclosure (standard design), as described above. This makes all third-party devices connected to the electronics box (lamp, filter unit, etc.) ready for operation.
  • Page 36 In the delivery state, the note shown above appears when tapping the "ON/OFF" button. This means that the alarm unit incl. the supplied safety weighing enclosure has not yet been officially qualified by an a1-safetech service technician. In this case, please follow the instructions on the display and contact a1-envirosciences GmbH at the indicated service hotline.
  • Page 37 The following information is displayed via the enclosure as well as the alarm system:  Serial number  Firmware  Date of the last maintenance by an a1-safetech service technician  Date of the next maintenance by an a1-safetech service technician ...

  • Page 38: Alarm State And Safe Operating State

    The standard version of the alarm system includes a power-reduced ECO mode. It can be started via the "ECO" button (V). This reduces the power of the connected filter units and thus the velocity of the air flowing into the enclosure to approx. 0.2 m/s. The parameters for the ECO mode must only be set by a qualified a1-safetech service technician.

  • Page 39: Resetting The Alarm

    The operating state of the alarm system is permanently displayed below the buttons that can be operated by the user. "AIRFLOW SAFE" indicates that the user can work safely in and with the safety weighing enclosure. The display line (VII) shows all peripheral devices that are operated with the system. In the standard version, a filtration unit and the enclosure lighting are shown here.

  • Page 40: Manual Testing Of The Sensor

    Manual testing of the sensor The function of the sensor can be checked in the following ways: • Blocking the sensor in the arm bar • Opening the front flap For all actions, the display changes to a visual alarm state (AIRFLOW FAIL). In addition, an acoustic signal sounds.
  • Page 41 Ensure a safe environment during operation as well:  As little draught as possible in the vicinity of the ST1 safety weighing enclosure  As little through traffic (windows or doors) as possible in the vicinity of the ST1 safety weighing enclosure ...
  • Page 42 In addition to the individually required equipment and materials, the following materials should be present in the ST1 safety weighing enclosure (they must be labelled accordingly as they are contaminated after use): ...
  • Page 43 SOP. Create a material list so that you can ensure that everything you need for this process (e.g. vessels and reagents) is available in the ST1 safety weighing enclosure before starting work. Planning - Concentration - Ease of mind Remember to plan enough time for your work processes! Precise and accurate weighing requires concentration and calmness.
  • Page 44 Warning of contamination risks All materials used in the ST1 safety weighing enclosure are to be considered contaminated.  Hands may only be pulled out of the work opening of the ST1 safety weighing enclosure after they have been thoroughly cleaned and decontaminated.
  • Page 45 Working with the waste bag system Before removing the waste bag, have the following materials ready inside the ST1 safety weighing enclosure:  Spare bag  Rubber band for fastening Division: 45 I 77...

  • Page 46: Discharging The Waste Bags

    Press the sealed bag into the outer bag. Fasten the new waste bag to the inner edge of the waste system using the rubber band. The entire waste bag should be in the interior of the ST1 weighing enclosure. Division: 46 I 77...
  • Page 47 Pull the black rubber ring over a waste bag. Pull this bag over the inner bag and secure it to the ST1 weighing enclosure using the black rubber ring. Division: 47 I 77...

  • Page 48: Intended Use Of Electrostatic Discharge Systems

    However, direct contact with the electrode tips should be avoided. We restrict the use of the discharge systems to the following safety enclosures  ST1 safety weighing enclosures  IE instrument enclosure  SB type SafetyBox/Glovebox ...
  • Page 49 Generally, the discharge electrodes are safe to touch. This means that touching the metal tips of the discharge electrodes will not cause electric shock. Ozone warning Ozone may be generated during operation of the electrodes. The ozone concentration generated in the vicinity of the electrodes depends on a variety of boundary conditions such as installation location, electrode current and voltage, air circulation, etc.
  • Page 50 Warning of electromagnetic fields Special hazard information on the risk to persons with pacemakers: Bringing the chest closer than 3.5 cm to the emission tips of the discharge electrode or touching several emission tips (one tip alone is not critical) over a large area by hand can cause the pacemaker to temporarily switch to fault mode.

  • Page 51: Installation And Commissioning

    3. High-voltage power supply unit for generating the necessary high voltage Figure 19 - Unloading bar mounted above the front flap of an ST1-900 Figure 20 - Point electrode mounted on the right side wall of an ST1-900 Division: 51 I 77...

  • Page 52: Use Of Electrostatic Discharge Systems

    The bar-shaped discharge electrode (1) mounted above the front flap ionises the air on a large scale in the interior of the safety enclosure with the aid of an electric field. The necessary high voltage in the range of 4-6 kV is generated by the high-voltage grid (2). The ionised air molecules can neutralise charges adhering to surfaces.
  • Page 53 Cleaning - Prevention of damage Always switch off the high-voltage power supply unit before cleaning the discharge electrodes! Do not damage the discharge tips during cleaning. Cleaning with moistened cloths is not recommended as on the one hand there is a risk of injury, and on the other hand fibre residues of the cloths get stuck on the electrode tips.
  • Page 54 Cleaning Warning of explosion and fire hazards Solvents can form explosive vapour/air mixtures. Dust can form explosive dust/air mixtures. An explosive atmosphere in conjunction with an ignition source can lead to an explosion. Solvents are highly flammable. Storage of flammable solvents in the equipment is therefore not permitted.

  • Page 55: Carrying Out The Cleaning

    (incompatibility with acrylic (PMMA)). Carrying out the cleaning The ST1 safety weighing enclosure must always be kept clean. The work surface must be cleaned after each use and decontaminated, if necessary, to avoid cross-contamination and substance leaks due to transverse flows.

  • Page 56: Suitable Cleaning Agents

    Notes on the malfunction  In the event of a malfunction, it is important to keep calm!  Be sure to keep your hands inside the ST1 safety weighing enclosure to prevent contamination from entering the environment of the ST1 safety weighing enclosure.

  • Page 57: Basic Safety Instructions For Maintenance And Repair Work

    Slowly close all opened reagents and sample containers and clean them from the outside with the decontamination wipes. In the ST1 safety weighing enclosure, take off the first pair of gloves and possibly the arm sleeves and dispose of them via the waste system. Now, you can take your hands out of the safety weighing enclosure and proceed with point 7.
  • Page 58 • Work on the electrical equipment must only be carried out by trained, authorised personnel. Risk of contamination when opening the filtration system The filtration system must not be opened by unauthorised personnel. The risk of contamination of the environment and the people in it is very high! •...

  • Page 59: Maintenance Intervals

     Alarm function (sensor test)  Smoke test (flow visualisation) on the ST1 safety weighing enclosure and in the environment Basic cleaning  Basic cleaning of the interior of the ST1 safety weighing enclosure excluding the rear wall Annually Basic cleaning before annual maintenance User ...

  • Page 60: Troubleshooting

    Troubleshooting Fault Action Carried out by Alarm lights do not Check the voltage connections, plug in the mains plug if User go on necessary. Display on the filter Check the voltage connections, plug in the mains plug if User unit does not light up necessary.

  • Page 61: Customer Service

    Customer service Our customer service is available to answer any questions you may have about the system. Please have the following information ready:  Type/model and serial number of the system  Short description of the error Germany, Austria and Phone: +49 (0) 211 75 84 83 112 Benelux...

  • Page 62: Dismantling By A1-Envirosciences

    Decommissioning and disposal If you no longer need a safety weighing enclosure and wish to disassemble it, you should observe the following points to avoid any risk of contamination. Risk of contamination due to improper disposal Improper disassembly and disposal of contaminated safety weighing enclosures and installed accessories may result in significant contamination hazards during disassembly or subsequent storage.

  • Page 63: Technical Data For St1 Series Safety Weighing Enclosures

    Technical specifications Technical data for ST1 series safety weighing enclosures Information for delivery and packaging Measurement [mm] Size Weight (without packaging) [kg] 900 x 763 x 694 1200 x 763 x 694 1200 1500 x 763 x 694 1500 Materials...

  • Page 64: Dimensions

    Dimensions Weighing enclosure dimensions Size 1200 1500 1196 1496 1105 1405 VIII Stainless steel table installation dimensions Size 1200 1500 1196 1496 1582 1582 1582 1088 1388 <900 <900 <900 Granite table installation dimensions Size 1200 1500 1196 1496 1583 1583 1583 1028...

  • Page 65: Constand Air Volume (Cav)

    Enclosure Volume flow at the outlet of the +10% of draught diverter width filtration unit [m³/h] [m³/h] 194.7 1200 267.3 1500 Consumption of complete System per hour ST1-900 ST1-1200 ST1-1500 0,38 kWh 0,5 kWh 0,63 kWh Division: 65 I 77...

  • Page 66: Technical Data On Peripheral Devices

    Technical data on peripheral devices Alarm system ST-ALARM-V3/DSPLY Article number ST-ALARM-V3/EBX Dimensions [mm] 410x160x120 DC01, powder-coated (display); EN-AW 6061 Material (electronics box) RAL9003, glossy (display); aluminium Colour anodised (electronics box) Weight [g] 1500 (display) + 1100 (electronics box) Power consumption [W] Voltage [V] 110-230 Frequency range [Hz]...
  • Page 67 Lamp ACC-LAMP-V3/SM; ACC-LAMP-V3/LRG; ACC- Article number LAMP-V3/XL Dimensions [mm] 880x135x18; 1180x135x18; 1480x135x18 Material DC01, powder coated Colour RAL9003, glossy Weight [g] 2000; 2600; 3300 Power consumption [W] Voltage [V] 24V DC Colour temperature [K] 4000 Fan unit Article number FAN-300-V3 Dimensions [mm] 440x350x315 Material...
  • Page 68 HEPA filter FILT-S-HEPA/V3 (one layer); FILT-D-HEPA/V3 (two Article number layers) 440x350x112 (one layer); 440x350x230 (two Dimensions [mm] layers) Material Aluminium (housing); STAMOID LIGHT (collar) Colour Aluminium, polished Weight [g] 4500 (one layer); 9100 (two layers) Power consumption [W] N/A Voltage [V] Filter class H14 (one layer);...

  • Page 69: System Dimensions - Filter Unit With Hepa Filter Or Activated Carbon Filter

    System dimensions - Filter unit with HEPA filter or activated carbon filter HEPA filtration unit HEPA filter, 1 layer HEPA filter, 2 layers Carbon filtration unit <520 Division: 69 I 77...

  • Page 70: Observed Standards

    It is suitable for personal protection in accordance with EN 14175-3 for fume cupboards and also complies with the ASHREA 110 standard. The ST1 series has been tested according to EN 689 and ISPE guidelines with surrogate substances by the independent German institute InfraServ. The test protocol can be found in appendix D.

  • Page 71: Technical Rules

    Technical rules When working with ST1 series safety weighing enclosures, enclosures and similar products from a1-envirosciences, the following regulations must be observed or the following standards apply: For Germany:  Technical rules for hazardous substances TRGS 526  EN 14175, part 3...

  • Page 72: Consumables For St1 Series Safety Weighing Enclosures

    Appendix A - Consumables Consumables for ST1 series safety weighing enclosures Article number Description ACC-BAG/WST Waste bags, 50 pieces/package GAS500 Smoke test kit GAS501 Test tubes for smoke test kit ACC-DECON/WIPE Decontamination wipes Accessories (optional) Article number Description BENCH-9 Stainless steel table for ST1-0900...
  • Page 73 Appendix B - Chemical resistance Chemical resistance of ceramic tiles The ceramic plates used originate from chemical apparatus construction, have been subject to practical testing for more than 40 years and have proven their durability in laboratories all over the world. Outstanding properties of the ceramic material used are the excellent chemical resistance, the hardness and the temperature resistance of up to 800°C.
  • Page 74 Appendix C - Table of efficacy for activated carbon 4 = very good adsorption 3 = good adsorption 2 = low adsorption 1= very low adsorption Acetone 3 Butyric acid 4 Turpentine Acetaldehyde 4 Chlorine 1 Solvent Acrolein 1 Chloroform 4 Menthol Alcohol 4 Diesel oil vapour...
  • Page 75 Appendix D - Declarations of conformity Division: 75 I 77...
  • Page 76 Division: 76 I 77...
  • Page 77 Appendix E - Certificates Division: 77 I 77...

This manual is also suitable for:

St1-1200St1-900St1-1500

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