TELEVAC VacuGuard series User Manual

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VACUGUARD USER’S GUIDE

PORTABLE VACUUM MEASUREMENT

TELEVAC

A DIVISION OF THE FREDERICKS COMPANY

2400 PHILMONT AVENUE,

HUNTINGDONVALLEY, PA 19006

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TABLE OF CONTENTS

SECTION & TITLE

01. DESCRIPTION

02. SAFETY INSTRUCTIONS

03. INSTALL THE BATTERY

04. INSTALL THE CABLE (S)

05. TEST YOUR VACUGUARD / DISPLAY UNITS

06. USEFUL INFORMATION

07. TROUBLESHOOTING

08. SPECIFICATIONS

09. UNPACKING & INSPECTION

10. WARRANTY INFORMATION

PLEASE READ THIS MANUAL THOROUGHLY BEFORE USING THIS

INSTRUMENT. REPORT ANY PROBLEMS IMMEDIATELY.

Wireless Portability : A replaceable “D” cell eliminates 110VAC extension cords

Rugged Const r uction: Powder coated extruded aluminum enclosure and an
Large Digital Display: Bright red LED display won’t wash out in direct sunlight.

Display reads in Torr or Millitorr, as appropriate to sensor type

Pos ition switch permit s re ading Tel e vac 2A/ 2A Mi ni or DV4 and DV6 sensors.

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CHAPTER 1 TELEVAC

Description

The VacuGuard is a small, self-contained instrument, designed to power and read
Televac 2A series or competitor compatible DV4 and DV6 series thermocouple sensors.
The VacuGuard is powered by a 1.5V ‘D’ cell and will accept either single use or
rechargeable ‘D’ cells. Front panel controls consist of a toggle power switch and a thre e­position sensor select switch. The digital displa y is a four digit; seven segment re d LED,

0.6” high, protected by a red neutral density filter that permits use in bright ambient
conditions. The instrument reads directly in torr or millitorr. Overall size is:
4”x2.5”x5.5”. Instrume nt weight i s 23 oz.

FEATURES

and their associated safety hazards.

available hands-free carry i ng cas e w ill go the distance for years of productive service.

CHAPTER 2 TELEVAC

These safet y a le rt sy mb ols in this manual or on the Product rear panel mean

Failure to comply with these instructions may result in serious personal injury, including

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Safety Instructions

START BY READING THESE IMPORTANT SAFETY INSTRUCTIONS AND
NOTES collected here for your convenience and repeated with additional information at

appropriate points in these instructions.

In these instructions the word “product” refers to the MV2A and a ll of it s ap prove d pa rts
and accessories.

NOTE: These instructions do not and cannot provide for every contingency that

may arise in connection with the installation, operation, or maintenance of this
product. Should you require further assistance, please contact Televac at the
address on the title page of this manual.

This product has be e n designed and tested to offe r r e asonably safe service provided in it’s
installed, operated and serviced in strict accordance with these safety instructions.

death, or property damage.

These safety precautions must be observed during all phases of operation,

installation, and service of this product.

Failure to comply with these precautions or with specific warnings elsewhere in

this manual violates safety standards of design, manufacture, and intended use of
the instrument. Televac disclaims all li ability for the cu stomer’s failure to compl y
with these requirements.

cautions - personal safety, property damage or danger from electrical shock. Read these
instructions carefully.

CHAPTER 2 (cont.) TELEVAC

The service and repair information in this manual is fo r the use of Qualified Service

Servicing on this product unless you are qualified to do so.

Objects and Liquid Entry – N ever push objects of any kind into t his product throu gh

a fire or electric shock. Be careful no t to spill liquid of any kind onto the products.

Do not substitute parts or modify instrument.

perform any unauthorized modifications to the product. Return the product to Televac for service

has unauthorized modifications.

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Personnel. To avoid shock, do not perform any procedures in this manual or perform any

READ Instructions :

Read all safety and operating instructio ns before operating the product.

RETAIN instructions:

Retain the Safety and Operating I nstructions for future reference.

HEED warnings:

Adhere to all warnings on the product and in the oper a ting inst ructions.

FOLLOW instructions:

Follow all operating and maintenance instructions.

ACCESSORIES:

Do not use accessories not recommended in this manual as they may require a
technician to restore the product to its normal operation.

To reduce risk of fire or electr ic shock, do not expose this product to rain or moisture.

`

openings as t hey may touch dang erous volt age point s or short out parts that could result in

Because of the danger on introducing additional hazards, do not install substitute parts or

and repair to ensure that safet y features are maintained. Do not use this product if it

CHAPTER 3 TELEVAC

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Install the Battery

A convention 1.5 volt “D” size dry cell battery is provide with the VacuGuard instrument
unless you’ve purchase the optional 1.5 volt NiCad rechargeable battery. You will need
to install the battery. Access to the battery compartment will be found on the rear on the
instrument case.

Fit a quarter or wide blade screwdriver into the slot on the battery compartment cover.
Turn the cover 90 degrees counter clockwise. The alignment tabs on the interior of t he
cover should be visible at the 6 and 12 o’clock positions in the slots of the battery
compartment. Turn the instru ment to a vertical orientation an d allow the cover to fall int o
your hand.

Insert the battery into the compartmen t with the positive (+) terminal facing toward the
rear of the instrument. The negative (-) contact plate inside the compartment is spring­loaded, allowing for battery travel of as much as 0.75” Align the battery compartment
cover over the end of the battery, so that the alignment tabs are again at the 6 and 12
o’clock positions. Press the cover into place and rotate it 90 degree clockwise with a
quarter or flat blade screwdriver to l ock the cover into place.

CHAPTER 4 TELEVAC

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Install the Cable(s)

The VacuGuard is equipped to power and display the output of either Hastings type DV4,
DV6 or Televac 2A series thermocouple sensors. Two modular (RJ Type) cable ports are
provides for thi s pu r pose on th e re ar of the in stru ment. A DV4/DV6 cable will fit into the
left hand port, while one of the two type 2A cables will fit the right hand port. Note that
while the modular plugs are of different sizes, the modular plug of the 2A cable will fit
either port, but will only work properly in the correct right hand port. The DV4/DV
modular plug will only fit t he left hand p ort.

If you are planning to use both sensor types, be sure to install only one ca ble at a
time. Install a cable now.

CHAPTER 5 TELEVAC

0-1000 MICRONS

+ - 1 MICRON

34,35,36………998,999,1000

1000-2000 MICRONS

100 MIC RONS

1000,1100,1200…..1999,2000

2 TORR

– 20 TORR

0.1 TORR

2.1,2.2,2.3……….19.8, 19.9, 20.0

If the display has a decimal point

TORR UNITS

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Test your VacuGuard

Connect the cable yo u’ve installed in step 3 to the proper thermocouple sensor. Move the
selector switch to the position for that sensor and turn on the instrument’s power switc h.
Record t he sensor’s reading. In routine operation, the instrument ’ s display will flas h
about once per second.

We highly recommend you purchase a reference stan dard for the type of thermocouple
sensor you are usi ng. The reference standa rd will allow you to verify the correct
operation of the VacuGuard I nst rument. A l i s t of recomm ended spares and options are
noted on Chapter 8 of the User’s G uide.

(2000 MICRONS)

MV2A UNITS DISPLAY

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CHAPTER 6 TELEVAC

Useful Information

Vacuum Terminology and the VacuGuard

Atmospheric pressure is defined at 760 torr (at sea level, when the barometric

pressur e is 29.92 Hg).

One torr is 1/760 of atmospheric pressure. One torr can also be expressed a s 1000

milli torr or 1000 Microns.

One millitorr or one micron i s 1/760,000 of atmospheric pre ssure.

The thermocouple sensor that are used with your VacuGuard instrument are designed to
measure a small portion of that wide band of reduce pressure that extends from
atmospheric pressure to a region known as very ultrahigh vacuum (~1x10
total spectrum of measurable vacuum contains about 18 decades of pressure.

For example:

The TELEVAC 2A series sensor m easure from 20 torr to 1 millitorr. Five decades.
The DV-6/DV-6R sensors measure from 1 torr to 1 mill itorr. Four dec ades.
The DV-4 measures from 20 torr to 0.1 torr. Two de cades.

Please realize that the smaller the dyn amic range o f the s en s or, th e less visibility the

user has to pressure changes.

-14

torr). This

CHAPTER 6(cont) TELEVAC

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Practical issues to consider with thermocouples sensors

The most common failure mechanism is gross contamination. If there is a probable

risk of contamination by particulate or liquids, we recommend the use of one of
our sensor filters.

Vertical orientation with electrical pins “Up” (where practical) is usually preferred

to inverted or horizontal orientation.

If your application requires a s ensor that’ s immune to shoc k, vibration , excessi ve

heat and/or severe weather conditions, contact us for information on our family of
Miniature 2A sensors.

It is usually useful to have a known reference to periodically check the instrument

and/or sensor performance. Refer to the information the next page about our
expensive reference standards.

Contacting us

Our main telephone number: 215-938-4444 and normal hours are 8:00 am to 5:00

pm eastern time.
Our Fax number: 215-947-7464
Our main email address: [email protected]
You can locate the name and contact information of your local TELEVAC

representative through our website: www.televac.com

CHAPTER 7 TELEVAC

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Troubleshooting

No Digital Display

Power switch is “off” => Turn it “on”
Battery is dead => Replace or recharge as appropriate

Improper Reading

Wrong cable or cable port is being used => Choose correct cable or (see chapter

4).

Selector switch is wrong position => Move to correct position (see chapter 5).
Thermocouple sensor may b e defective => Test a known good thermocouple

sensor or reference standard.

Entire displa y or a single d ec ima l p o int is flashing

Indication of low battery power => Replace with a new or freshly recharged

cell.

CHAPTER 8 TELEVAC

Power source

1.5 volt “D” size dry cell or optional NiCad batt ery

Cell Utilization

Approx. 60 hours per disposal cell or approx. 12-20 hours per NiCa d charge *

Display

Red LED, 0.56” high, four digits

Sensor Input

Televac 2A or 2A Mini ature, DV4 o r DV6, DV6R compatible

Cable Interface

RJ modular jack

Displ ay Output

Torr or Millitorr as appropriate to sensor type

Size

4.0”x2.5”x5.5”

Weight with battery

23 oz

Televac 2A reference standard, 0 millitorr

P/n 2-2100-237

Televac 2A sensor cable

P/n 2-9800-081

Televac 2A miniature sensor cabl e, NA SA type

P/n 2-9800-082

DV4/DV6 sensor cable

P/n 1-2400-036

Rechargeable NiCad b at tery, pack of 2 cells

P/n 1-5400-025

Battery charger

P/n 1-5400-024

Soft sided carrying case

P/n 1-2600-26

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Specifications

Software version 1.70

* The rate of battery drain is a f unction of which brand therm ocouple sensor is bein g measured.

Recommended Options & Spares

CHAPTER 8 (CONT) TELEVAC

VACUGUARD W/2A CABLE, BAG

2-3001-103

VACUGUARD W/ 2AMINI CABLE, BAG

2-3001-104

VACUGUARD W/2A & DV4/6 CABLE,

2-3001-105

VACUGUARD W/2A &DV4/6 CABLE,

2-3001-106

w/ BAG & NICAD B ATTERY & CHARGER

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CHAPTER 9 TELEVAC

Unpacking and inspection

Inventory the Contents

Compare the list of items from y our original purchase documents against the items

list ed on our shipping documents.
Compare these against the actual contents of the shipping container.
Report any differences to TELEVAC.

Damage

In the unlikely event that the shipping container was damaged in transit, carefully

inspect the contents for damage.
If the MV2A Instrument or any of its accessories were damaged in transit, contact

the freight carrier and tell t hem you wish to make a damage claim.
Contact TELEVAC for further instructi ons on replacement of damaged materials.

Should any of the above problems be encountered, contact the factory immediately.

Any unauthorized repairs will void the warranty.

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CHAPTER 10 TELEVAC

Warranty Information

The Fredericks Company warrants all instruments and components of its

manufacture to be free of defects in material s and workmanship.

Our obligation under this warranty is limited to servicing or adjusting any

instrument returned to us and replacing any part, except those specifically exempt

from this guarantee, which shall within one year after delivery to the original

purchaser be returned to us with transportation charges prepaid, and which our

examination should disclose to our satisfaction to have been defective. Those

portions specifically exempt from this guarantee are gauge tubes, batteries as well

as meters, which have been dissembled or physically damaged.

The Fredericks Company does not assume any other obligation than that stated in

this warranty nor does it authorize any person to assume for them any liability in

connection with the sale, service or use of the Fredericks Company’s instruments.