Agilent Technologies 7820A Guía del usuario

Agilent Technologies

Agilent 7820A

Gas Chromatograph

Safety Manual

27820A GC Safety Manual

Notices

No part of this manual may be reproduced in

any form or by any means (including elec-

tronic storage and retrieval or translation

into a foreign language) without prior agree-

ment and written consent from Agilent

Technologies, Inc. as governed by United

States and international copyright laws.

Manual Part Number

G4350-90010

Edition

Fifth edition, August 2016

Fourth edition, June 2015

Third edition, June 2011

Second edition, June 2009

First edition, March 2009

Printed in USA and China

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Warranty

The material contained in this

document is provided “as is,” and

is subject to being changed,

without notice, in future editions.

Further, to the maximum extent

permitted by applicable law,

Agilent disclaims all warranties,

either express or implied, with

regard to this manual and any

information contained herein,

including but not limited to the

implied warranties of

merchantability and fitness for a

particular purpose. Agilent shall

not be liable for errors or for

incidental or consequential

damages in connection with the

furnishing, use, or performance of

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information contained herein.

Should Agilent and the user have

a separate written agreement

with warranty terms covering the

material in this document that

conflict with these terms, the

warranty terms in the separate

agreement shall control.

Technology Licenses

The hardware and/or software described in

this document are furnished under a license

and may be used or copied only in accor-

dance with the terms of such license.

Restricted Rights

If software is for use in the performance of a

U.S. Government prime contract or subcon-

tract, Software is delivered and licensed as

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or as a “commercial item” as defined in FAR

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ware” as defined in FAR 52.227-19 (June

1987) or any equivalent agency regulation or

contract clause. Use, duplication or disclo-

sure of Software is subject to Agilent Tech-

nologies’ standard commercial license

terms, and non-DOD Departments and

Agencies of the U.S. Government will

receive no greater than Restricted Rights as

defined in FAR 52.227-19(c)(1-2) (June

1987). U.S. Government users will receive

no greater than Limited Rights as defined in

FAR 52.227-14 (June 1987) or DFAR

252.227-7015 (b)(2) (November 1995), as

applicable in any technical data.

Safety Notices

CAUTION

A CAUTION notice denotes a

hazard. It calls attention to an

operating procedure, practice, or

the like that, if not correctly

performed or adhered to, could

result in damage to the product or

loss of important data. Do not

proceed beyond a CAUTION notice

until the indicated conditions are

fully understood and met.

WARNING

A WARNING notice denotes a

hazard. It calls attention to an

operating procedure, practice, or

the like that, if not correctly

performed or adhered to, could

result in personal injury or death.

Do not proceed beyond a

WARNING notice until the

indicated conditions are fully

understood and met.

Agilent 7820A Gas Chromatograph

Safety Manual

Agilent Technologies

Introduction

Important Safety Warnings 4

Hydrogen Safety 7

Uncombusted Hazardous Gases 9

Micro-Electron Capture Detector (µECD) 10

Fuses and Batteries 12

Safety and Regulatory Certifications 13

Intended Use 17

Cleaning 17

Recycling the Product 17

47820A GC Safety Manual

Introduction

Important Safety Warnings

Before moving on, there are several important safety notices that you

should always keep in mind when using the Agilent 7820A GC.

Many internal parts of the GC carry dangerous voltages

If the GC is connected to a power source, even if the power switch is off,

potentially dangerous voltages exist on:

•The wiring between the GC power cord and the AC power supply, the AC

power supply itself, and the wiring from the AC power supply to the power

switch.

With the power switch on, potentially dangerous voltages also exist on:

•All electronics boards in the instrument.

•The internal wires and cables connected to these boards.

•The wires for any heater (oven, detector, inlet, or valve box).

WARNING

When handling/using chemicals for preparation or use within the GC, all applicable

local and national laboratory safety practices must be followed. This would include,

but is not limited to, correct use of Personal Protective Equipment (PPE), correct use

of storage vials, and correct handling of chemicals, as defined in the laboratory’s

internal safety analysis and standard operating procedures. Failure to adhere to

laboratory safety practices could lead to injury or death.

WARNING

All these parts are shielded by covers. With the covers in place, it should be difficult

to accidentally make contact with dangerous voltages. Unless specifically

instructed to, never remove a cover unless the detector, inlet, or oven are turned off.

WARNING

If the power cord insulation is frayed or worn, the cord must be replaced. Contact

your Agilent service representative.

Introduction

7820A GC Safety Manual 5

Do not use an Uninterruptable Power Supply (UPS) with a GC

If the area where the GC is located suddenly loses power, an unsafe condition

can result if the GC remains powered on. Do not use the GC with a UPS.

Electrostatic discharge is a threat to GC electronics

The printed circuit (PC) boards in the GC can be damaged by electrostatic

discharge. Do not touch any of the boards unless it is absolutely necessary. If

you must handle them, wear a grounded wrist strap and take other antistatic

precautions. Wear a grounded wrist strap any time you must remove the GC

right side cover.

Many parts are dangerously hot

Many parts of the GC operate at temperatures high enough to cause serious

burns. These parts include but are not limited to:

•The inlets

•The oven and its contents

•The detectors

•The column nuts attaching the column to an inlet or detector

•The valve box

You should always cool these areas of the GC to room temperature before

working on them. They will cool faster if you first set the temperature of the

heated zone to room temperature. Turn the zone off after it has reached the

setpoint. If you must perform maintenance on hot parts, use a wrench and

wear thermally protective gloves. Whenever possible, cool the part of the

instrument that you will be maintaining before you begin working on it.

WARNING

Be careful when working behind the instrument. During cool-down cycles, the GC

emits hot exhaust which can cause burns.

67820A GC Safety Manual

Introduction

Oven thermal leaks

Do not allow wiring or temperature probes to pass through the oven door jam.

Agilent recommends using one of the access holes.

WARNING

The insulation around the inlets, detectors, valve box, and the insulation cups is

made of refractory ceramic fibers. To avoid inhaling fiber particles, we recommend

the following safety procedures: ventilate your work area; wear long sleeves,

gloves, safety glasses, and a disposable dust/mist respirator; dispose of insulation

in a sealed plastic bag; wash your hands with mild soap and cold water after

handling the insulation.

WARNING

Objects passing through the oven door seal can cause thermal leaks which create

hazardous hot spots which cause burns and melt equipment.

Introduction

7820A GC Safety Manual 7

Hydrogen Safety

Hydrogen gas may be used as carrier gas, and/or as fuel for the FID and NPD.

When mixed with air, hydrogen can form explosive mixtures.

Hydrogen is a commonly used GC carrier gas. Hydrogen is potentially

explosive and has other dangerous characteristics.

•Hydrogen is combustible over a wide range of concentrations. At

atmospheric pressure, hydrogen is combustible at concentrations from 4%

to 74.2% by volume.

•Hydrogen has the highest burning velocity of any gas.

•Hydrogen has a very low ignition energy.

•Hydrogen that is allowed to expand rapidly from high pressure into the

atmosphere can self-ignite due to an electrostatic spark.

•Hydrogen burns with a nonluminous flame which can be invisible under

bright light.

Hydrogen shutdown

Hydrogen gas may be used as a carrier or as fuel for some detectors. When

mixed with air, hydrogen can form explosive mixtures.

WARNING

When using hydrogen (H2) as the carrier gas or fuel gas, be aware that hydrogen

gas can flow into the GC oven and create an explosion hazard. Therefore, be sure

that the supply is turned off until all connections are made and ensure that the inlet

and detector column fittings are either connected to a column or capped at all times

when hydrogen gas is supplied to the instrument.

Hydrogen is flammable. Leaks, when confined in an enclosed space, may create a

fire or explosion hazard. In any application using hydrogen, leak test all

connections, lines, and valves before operating the instrument. Always turn off the

hydrogen supply at its source before working on the instrument.

87820A GC Safety Manual

Introduction

The GC monitors inlet and auxiliary gas streams. If a stream shuts down

because it is unable to reach its flow or pressure setpoint and if that stream is

configured to use hydrogen, the GC assumes that a leak has occurred and

declares a hydrogen safety shutdown. The effects are:

•The offending channel and any associated channels (such as septum purge)

are set off.

•The split valves in the split/splitless inlets open.

•The oven (heater and fan) turns off.

•The small heated zones are turned off.

•An alarm tone sounds.

To recover from this state, fix the cause of the shutdown (tank valve closed,

serious leak, others). Turn the instrument off, then back on.

Measuring hydrogen gas flows

When measuring gas flows on a detector using hydrogen for the detector flame

or carrier gas, measure the hydrogen flow separately. Never allow an air

stream to enter when hydrogen is present in the flow meter.

WARNING

The GC cannot always detect leaks in inlet and/or detector gas streams. For this

reason, it is vital that column fittings should always be either connected to a

column, or have a cap or plug installed. The H2streams must be configured for

hydrogen so that the GC is aware of hydrogen use.

WARNING

Do not measure hydrogen together with air or oxygen. This can create explosive

mixtures that may be ignited by the automatic ignitor.

To avoid this hazard:

Turn the automatic ignitor off before you begin.

Always measure gases separately.

Introduction

7820A GC Safety Manual 9

Uncombusted Hazardous Gases

During normal operation of the GC with many detectors and inlets, some of

the carrier gas and sample vents outside the instrument through the split vent,

septum purge vent, and detector exhaust. If any sample components are toxic

or noxious, or if hydrogen is used as the carrier gas, these exhausts must be

vented to a fume hood. Place the GC in the hood or attach a large diameter

venting tube to the outlet for proper ventilation.

10 7820A GC Safety Manual

Introduction

Micro-Electron Capture Detector (µECD)

The μECD contains a cell plated with 63Ni, a radioactive isotope. The beta

particles released at the energy level in the detector have little penetrating

power—the surface layer of the skin or a few sheets of paper will stop most of

them—but they may be hazardous if the isotope is ingested or inhaled. For this

reason, handle the cell with care. Cap the detector inlet and outlet fittings

when the detector is not in use. Never introduce corrosive chemicals into the

detector. Vent detector exhaust outside the laboratory environment.

Refer to the safety documentation provided with the detector for important

details about safety, maintenance, and compliance with local government

regulation.

WARNING

Materials that may react with the 63Ni source, either to form volatile products or to

cause physical degradation of the plated film, must be avoided. These materials

include oxidizing compounds, acids, wet halogens, wet nitric acid, ammonium

hydroxide, hydrogen sulfide, PCPs, and carbon monoxide. This list is not exhaustive

but indicates the kinds of compounds that may cause damage to 63Ni detectors.

WARNING

In the extremely unlikely event that the oven or the detector-heated zone should go

into thermal runaway (maximum, uncontrolled heating in excess of 400 °C) and the

detector remains exposed to this condition for more than 12 hours, take the

following steps:

1 After turning off the main power and allowing the instrument to cool to room

temperature, cap the detector inlet and exhaust vent openings. Wear disposable

plastic gloves and observe normal laboratory safety precautions.

2 Contact your local Agilent Technologies sales office or distributor for ECD disposal

instructions

3 Include a letter stating the condition of abuse.

It is unlikely, even in this very unusual situation, that radioactive material will

escape the cell. However, permanent damage to the 63Ni plating within the cell is

possible; therefore, the cell must be returned for exchange.

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