Industrial Scientific VX500 Manual de usuario

P/N 1709-8773

REV 3.0 Printed 0104 1,000

Specifications Subject to Change

1001 Oakdale Road, Oakdale, PA 15071-1500

(412) 788-4353 • Toll Free 1-800-DETECTS

FAX 412-788-8353 • Service Dept. 1-888-788-4353

Instruction

Manual

GUARANTEED.

FOR LIFE.

HOTO

ONIZATION

ETECTOR

OUR MISSION

Design - Manufacture - Sell:

Highest quality products

for the preservation of

life and property.

Provide:

Best customer service

available.

Dear Valued Customer,

Thank you for buying and using Industrial Scientific’s

VX500 PhotoIonization Detector.

Your VX500 can be relied upon for dependable service,

day after day. It has been designed, manufactured, tested

and proven under the most scrutinizing conditions

possible. With the minimal care and maintenance

described in this Instruction Manual, it will provide you

with years of reliable monitoring.

I am most concerned that you be pleased with the

performance of your VX500 in the months and years

ahead. I urge you to call us with any questions or

comments you may have. Often times a phone call and a

question can save you hours of frustration. Please never

hesitate to contact me at 1-800-DETECTS (338-3287).

All of us at Industrial Scientific appreciate the opportunity

to serve you.

Sincerely,

Kent D. McElhattan

President & CEO

Industrial Scientific Corporation

ARNINGS AND

AUTIONARY

TATEMENTS

Failure to perform certain procedures or note certain conditions may

impair the performance of the instrument. For maximum safety and

performance, please read and follow the procedures and conditions

outlined below.

Recharge battery only in a non-hazardous location.

Instrument tested for intrinsic safety in explosive gas/air (21.%

oxygen) mixtures only.

UV lamp requires periodic cleaning to function properly. The

frequency of cleaning is dependent upon the environment in which

the VX500 is used. Industrial Scientific recommends cleaning the

UV lamp after every 40 hours of use.

Any new or freshly cleaned 10.6 eV lamp requires a burn-in

period of 24 hours in order for the lamp’s output to stabilize. This is

done by placing the lamp into the lamp conditioner found on the

charger/datalink accessory.

Always check the ionization potential of the target gas prior to

sampling to ensure proper lamp selection. For example, a 10.6 eV

lamp can only detect gases with an ionization potential below

10.6 eV.

The presence of water vapor in the sample stream can cause

quenching of the detector signal due to UV absorption.

Oxygen and methane are UV absorbers. Significant changes in

their concentration can cause a change in the PID signal.

Ammonia gas causes degradation of the VX500 PID module’s

performance.

Ethylene gas does not provide a consistent signal therefore the

VX500 should not be relied upon to provide consistent readings

when monitoring ethylene.

A 5 minute warm-up time is required for VOC readings to fully

stabilize after power-up of the VX500.

ARNINGS AND

AUTIONARY

TATEMENTS

NTRODUCTION

HEORY OF

PERATION

NPACKING

NSTRUMENT

PERATION

Turning the VX500 On and Off 8

VX500 Gas Reading Mode 9

ONFIGURATION

CONS

IEWING THE

VX500 O

PERATING

ODES

Changing Gas Type 10

User Identification 10

Site Identification 11

Zeroing and Calibration 11

Peak Readings 11

Snapshot Mode 12

TWA/STEL Readings 12

Tick Mode 12

Datalogging Session Indicator 13

Datalog Session Pause 13

Reset Datalog Session 13

Clear Datalogging Memory 13

ALIBRATING THE

VX500 14

ONFIGURING THE

VX500’

USTOM

ETTINGS

Security Code 15

Change Security Code 16

Change Gas Data 16

Edit Favorite Response Factors List 16

Using the Response Factors List 16

Edit User Identification List 17

Edit Site Identification List 17

Allow Viewing of Peak Reading in the Field 18

STEL/TWA Configuration 18

Allow Viewing of Ticks Screen in the Field 18

Select Backlight Mode 19

Allow Viewing of Site and User in Field 19

Allow Selection of Gas in Field 19

Change Alarm Options 19

Edit Time and Date 20

Datalog Configuration 20

Calibration Configuration 21

AINTENANCE

Charging the Batteries 22

Changing the Internal Filter 22

Cleaning and Replacing the PID Lamp 23

Lamp Removal 24

Lamp Cleaning Procedure 24

PECIFICATIONS

ONIZATION

OTENTIALS FOR

OMMON

NDUSTRIAL

ASES

VX500 R

ESPONSE

ACTORS

IST

XPLODED

IEW

& R

EPLACEMENT

ARTS

VX500 R

EPLACEMENT

ARTS

IST

ARRANTY

TABLE OF CONTENTS

HOTO

ONIZATION

ETECTOR

NTRODUCTION

PhotoIonization detectors (PIDs) are a proven and reliable

means of detecting volatile organic compounds (VOCs) in

a variety of applications. Although the PID in general is

not capable of distinguishing one gas species from another,

it is a useful tool for detecting potentially hazardous gas

vapors such as benzene, toluene, xylene and hundreds of

other compounds at parts per million (ppm) or sub-ppm

levels. The low resolution of the PID makes this

instrument ideal for detecting traces of hydrocarbon gases

in confined spaces, hazardous materials sites, areas under

arson investigation, locations prone to releasing fugitive

emissions or in environments where prolonged gas

exposures may present a threat to workers’ health and

safety.

When used within the guidelines set forth in this manual

the VX500 PhotoIonization Detector can be relied on to

provide years of dependable service. These instructions

will guide you through the set-up, operation, maintenance

and calibration necessary for you to be assured that your

VX500 is operating properly.

HEORY OF

PERATION

The VX500 PhotoIonization Detector operates on the

principle of absorption of ultraviolet light energy by a

target gas. The internal sampling pump of the VX500

draws a gas stream into the instrument’s ionization

chamber. This chamber holds an ultraviolet light source

with a known energy potential. This potential is referred

to as the photon energy of the lamp. If the energy from

the lamp is at a level greater than the amount of energy

required to excite the gas (the ionization potential) it will

cause it to ionize, or release electrons. These electrons

gather on the electrodes within the PID module and the

instrument’s electronics interpret them as a quantitative

concentration of gas. The number of electrons released is

proportional to the concentration of the gas in the chamber.

For example: A PID with an energy source or lamp with a

10.6 electron-volt (eV) photon energy is capable of

detecting any compound which has an ionization potential

less than or equal to 10.6 eV. Once the gas exits the

ionization chamber it reclaims its lost electrons, returns to

its original state and is returned to the atmosphere.

Display

Gas In

Gas Out

(No Longer Ionized)

Gas Out

(No Longer Ionized)

UV Lamp

100 PPM

Amplifier

Electrode Electrode

UV Lamp’s Photon

Energy is expressed in

eV or ElectronVolts

Graphic representation of

PID theory of operation

ENTER

ON/OFF

MODE

PPM VOC

PHOTOIONIZATION DETECTOR

Gas

Sample

Overflow

Visual

Alarm

Gas Inlet

Lamp

Cover

Charger/

Datalink

Port

Light Sensor

for Display

Backlighting

Display

Up or “+”

Ionized

Sample

Output

Battery

Cover

FRONT

BACK

NPACKING THE

NSTRUMENT

The shipping box should contain the following items.

Account for each item before discarding the box.

QUANTITY PART NUMBER DESCRIPTION

1 18104034 VX500 PID Monitor

1 17098773 VX500 Instruction Manual

1 17095746 Maintenance Tool

1 17104407 Start-Up Card

1 18104364 Nylon Carrying Case

1 17065970 Urethane Tubing for

Calibration

After unpacking, if any listed item is missing, contact

either your local distributor of Industrial Scientific

products, or call Industrial Scientific Corporation at

1-800-DETECTS (338-3287) in the United States and

Canada, or 412-788-4353.

Enter/

backlight

i-Button®

Contact

Audible Alarm

Down

or “-”

On/

Off

Mode

External

Alarm

Socket

BOTTOM

NSTRUMENT

PERATION

TURNING THE VX500 ON AND OFF

To turn the VX500 on, press and hold on the unit’s

membrane keypad until the instrument emits a short beep

and the VX500 welcome screen appears on the instrument

display. The current revision of instrument operating

software is shown below the instrument model name.

Pressing while this screen is shown will rotate the

display 180 degrees to make viewing easier in applications

where the VX500 may be hung upside-down.

After the welcome screen, the VX500 configuration screen

will be displayed. This screen shows all parameters

currently set in the instrument including the calibration gas

concentration and all current alarm level settings.

Following the configuration screen, the instrument will

display a brief countdown timer while the VX500

completes the automatic warm-up cycle. During this

countdown, if and are pressed simultaneously,

the VX500 will enter into the configuration mode giving

you the opportunity to change the instrument’s custom

settings. If no keys are pressed during warm-up, the

display will time out and begin detecting gas in the normal

operation mode.

To turn the VX500 off, press and hold at any time

during operation until the instrument display shows

RELEASE. After releasing the instrument’s display

will blank and all instrument operation will cease.

VX500 GAS READING MODE

Once the VX500 enters the Gas Reading Mode the

instrument display will show the concentration of gas

currently being detected along with the corresponding gas

type. For general VOC detection this gas type will be

isobutylene. You may select another gas in the

configuration mode by editing the “favorites” list (see

page 16). Gases selected from the favorites list will use

response factors to determine actual gas concentrations.

These response factors are referenced to isobutylene

unless the VX500 is directly calibrated to the specific gas.

If the monitored concentration of gas exceeds a preset

limit for low alarm, high alarm, STEL, or TWA the

VX500 will alert you by sounding an audible tone in

conjunction with flashing an ultra bright red LED. Alarm

conditions are also activated whenever a sensor fails

calibration, the pump fails or becomes blocked, or the

battery power is too low to operate the VX500.

CONFIGURATION ICONS

The top line of the instrument display will show a series of

icons which identify the instrument’s current operating

configuration. These icons are identified below and are

explained in greater detail in later sections of this manual.

Datalogging On

Battery Type and charge status (Shading indicates

charge status) R = rechargeable A = alkaline

Tick Mode

Snapshot Mode

ENTER

ON/OFF

MODE

ON/OFF

MODE

ON/OFF

MODE

Rev1.0

E To Rotate 180

ISOBUTYLENE

Ratio = 1.00

Cal 100ppm

Low 100ppm

High 200ppm

STEL 300ppm

TWA 8H 1000ppm

0.1ppm

Direct Cal

ISOBUTYLENE

SITE ID:

Press until "Site ID" appears. The display will show

the current site id that is entered into the instrument. If

"Change Site and User ID in the Field" is enabled in the

VX500 configuration modes, pressing enter will allow you

to change to current site. If enter is pressed, the VX500

will look for the presence of an iButton on the iButton

contact. If an iButton is detected, the site information will

automatically be loaded into the instrument. If no iButton

is detected, the user is prompted to select a site from the

site id list, or manually enter the site name using the arrow

keys and .

ZEROING AND CALIBRATION:

If field calibration is enabled in the set up menus, press

until the Calibration Screen is reached. This screen shows

you the last/next time calibration has occurred/is to occur.

Pressing will enter the instrument into the zeroing

sequence. Once zeroing is complete, pressing the

key will allow the user to perform a calibration. (see

Calibrating the VX500). If no buttons are pressed after

the zeroing sequence, the instrument will return to normal

operation.

PEAK READINGS:

If the Peak Hold feature is enabled, press until

"Peak" appears. The peaking reading displayed represents

the highest VOC concentration measured since the peak

reading was last cleared. In the instrument configuration

menus, if clearing peaks in the field is enabled, pressing

the key will clear the peaks. If this mode is not

enabled, the peaks will not be able to be cleared.

CHANGING GAS TYPE:

If changing gas type in the field is enabled, pressing

one time during the normal operating screen will advance

the instrument into the change gas type screen. This

operating mode allows the user to select a response factor

from either the Favorites List or the entire list of

preprogrammed response factors. Using the arrow keys,

scroll until the desired gas type is highlighted. Once

highlighted, press the enter key. The instrument will enter

into a gas set up screen where the calibration gas and

alarm set points can be changed. Use the arrow keys to

scroll to the desire field to be modified. Once highlighted,

press to highlight the value. Using the arrow keys

increase or decrease the value until desired setting is

reached. Press to accept the new value. Once all

changes are made, press to enter the gas readings

screen. The display will now show the new response

factor that the VX500 is set to. For a complete list of

available response factors, refer to the table on page XX.

USER ID:

Press until "User ID" appears. The display will show

the current user id that is entered into the instrument. If

"Change Site and User ID in the Field" is enabled in the

configuration, pressing enter will allow you to change to

current user. If enter is pressed, the VX500 will look for

the presence of an iButton on the iButton contact. If an

iButton is detected, the user information will automatically

be loaded into the instrument. If no iButton is detected,

the user is prompted to select a user from the user id list,

or manually enter the user name using the arrow keys and

User ID

E To Change

M To Continue

▼scan iButton

IEWING THE

VX500 O

PERATING

ODES

ENTER

ON/OFF

MODE

ON/OFF

MODE

ON/OFF

MODE

ON/OFF

MODE

ON/OFF

MODE

ON/OFF

MODE

Mike Labans

Site ID

E To Change

M To Continue

▼scan iButton

Vessel 63

Next Cal Date

06/26/2003

Calibrate

Instrument?

Press E To Zero

Press M To Skip

ZEROING

Peak

0.0ppm

ISOBUTYLENE

Press E To Clear

DATALOGGING SESSION INDICATOR

If the Datalogging feature is enabled press until the

“Datalog Session” screen appears. The datalogging

session indicator displays the elapsed time that has passed

since the datalogging session was last reset along with the

current date and time. At one minute recording intervals

the VX500 is capable of storing up to 150 hours of gas

readings.

DATALOG SESSION PAUSE

If the Datalogging Pause feature is enabled, press

until the “Datalog Session Enabled/Paused” screen

appears. Pressing during this mode will toggle the

datalogger from paused to enabled, allowing the user to

control when the VX500 is datalogging. When paused,

the datalogging icon flashes.

RESET DATALOGGING SESSION

If the Datalogging feature is enabled, press until the

“Reset Datalog Session” screen appears. Pressing

during the mode will start a new datalogging session and

reset the elapsed session timer to 00:00. Pressing one

time from the datalogging session indicator will return the

instrument to the normal operating screen.

CLEAR DATALOGGING MEMORY:

If the Clear Datalogging feature is enabled, press

until "Clear All Data" appears. Pressing the during

this mode will clear all of the current datalogging memory.

Pressing will return the instrument to the normal

operating screen.

SNAPSHOT MODE:

If the Snapshot mode is enabled, press until the

Snapshot menu screen appears. The Snapshot operating

mode allows the user to capture the current instrument

reading and store it in the datalogging memory along with

the current time and date stamp. Pressing at any time

while this mode is displayed will automatically result in

the reading, time and date to be recorded into the

instrument memory. When datalogging is turned off, the

snapshot mode can be enabled. For more information on

setting up the snapshot mode, refer to the Datalog

Configuration section on page 20.

TWA/STEL READINGS

If the STEL and TWA features are enabled, press

until the TWA/STEL screen appears. This screen will

display the current 8-hour time weighted average (TWA)

and 15 minute short term exposure limit (STEL) average

readings measured since these readings were last cleared

and reset. Pressing while in this mode will reset the

current TWA and STEL readings to zero. Resetting the

STEL and TWA readings will automatically create a new

datalogging session if the VX500’s datalogging feature is

enabled.

TICK MODE

If the Tick mode feature is enabled, press until the

tick screen appears. With the tick mode enabled the

VX500 will sound an audilble tick which increases in rate

as the gas concentration detected is increased. This

function may be useful in tracking leaking gas

concentrations or while detecting fugitive emissions.

ENTER

ON/OFF

MODE

ON/OFF

MODE

ON/OFF

MODE

ON/OFF

MODE

ON/OFF

MODE

ON/OFF

MODE

ON/OFF

MODE

ON/OFF

MODE

ON/OFF

MODE

6/20/2002 08:22

+25.3 C

Datalog Session

Elapsed Time

00:01

Datalog Session

Press E To Reset

Datalog Session

> Enabled

E To Change

TWA 0

STEL 0

E to reset both

M to Continue

0.1ppm

▲ &▼ to Change

Tick Rate

E to Accept

0ppm

0 ppm

E To Update

Gas detection instruments are potential life saving devices.

Recognizing this fact, Industrial Scientific Corporation

recommends that a functional “bump” test be performed on

every instrument prior to each days use. A functional test is

defined as a brief exposure of the monitor to a

concentration of gas(es) in excess of the lowest alarm set-

point for the sensor for the purpose of verifying sensor and

alarm operation and is not intended to be a measure of the

accuracy of the instrument.

Industrial Scientific Corporation further recommends that

a full instrument calibration be performed using a certified

concentration(s) of Industrial Scientific branded calibration

gas(es) monthly to ensure maximum accuracy.

Use of calibration gases from manufacturers other than

Industrial Scientific may void product warranties and limit

liability claims against the manufacturer.

If an instrument fails to operate properly following any

functional “bump” test, a full instrument calibration should

be performed prior to use.

To calibrate the VX500 press in the Gas Reading

mode once to advance to the calibration screen. Press

to begin the zeroing process. During the zeroing process,

the words

“

Zero in progress” appear on the display. When

the zeroing process is complete, the instrument will

display “Apply XXX PPM” of the gas selected to be

monitored. If you wish to perform the span calibration,

apply the calibration gas thru a demand flow regulator and

press to begin calibration. The VX500 will

automatically recognize the presence of the calibration gas

and the instrument will be calibrated automatically when

the sensor response to the calibration gas becomes stable.

Upon completion of calibration the VX500 will display a

full span value and calibration status. A full span value

that is greater than 70% of the applied gas concentration is

considered good. A full span value that falls between

70% and 50% of the applied gas value is considered

marginal.

The VX500 has many user configurable options and

features. These features may be accessed through the

configuration software utility and a PC, or adjusted by

pressing and simultaneously during the warm-up

cycle when the count down timer is displayed.

Configuring your VX500 is very intuitive. Every option is

highlighted on the display. In general:

Pressing or will step you through the modes.

Pressing selects a function or accepts (saves) a value.

Pressing moves you backward in the configuration or

steps you completely out of set up to the “Gas Reading

Mode.”

SECURITY CODE

Once the configuration mode has been entered, the

instrument will prompt you to enter a three digit security

code access code (if this feature is enabled). If the

security code feature is activated on the VX500, no

configuration changes can be made without entering the

proper code. The security code is entered by using

and to scroll through the values. When the desired

security code is reached, press to accept the value.

The VX500's display will step to the next availble

configuration screen if the proper code has been entered.

ZERO

COMPLETE

Apply Cal Gas

To Instrument

Press E to Span

Press M to Skip

Instrument

is Calibrating

Calibration

Complete

62 Span

ENTER

ON/OFF

MODE

ENTER

ON/OFF

MODE

ALIBRATING THE

VX500

ONFIGURING THE

VX500’

USTOM

ETTINGS

Enter Security

Code Using ▲ &▼

E To Accept

M to Exit

A full span value below 50% of the applied gas value will

fail calibration. For marginal or failed calibration the PID

lamp may need to be cleaned (refer to Cleaning and

Replacing the PID Lamp). If a VX500 fails either zero or

span functions, the VX500 notes this condition on the

display and the unit will not operate until the condition is

corrected.

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