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OPERATION MANUAL
DENSITY METER
TYPE LQ500


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INTRODUCTION
Thank you very much for your purchase of the LQ500 Density Meter (Hereafter, LQ500).
This manual is prepared for people in charge of installation, operation or maintenance. The manual
describes the precautions in using the meter, and explains about installing, adjusting, calibrating and
maintaining the LQ500 meter.
Carefully read this manual before using the meter for efficient and safe operation. Always keep the
manual in a place where you can easily access.
This equipment is suitable for use in Class I, Division 2, Group A, B, C, D or non-hazardous
locations only. (UL/CUL hazardous locations type only)
About Safety Precautions
Carefully read the Safety Precautions that appear in the following pages before using the Meter.
The safety signs used in the Safety Precautions will appear again in the following sections for your
safety.
Notice
1.
Do not copy or transcribe this manual in part or entirety without written permission from Toshiba.
2.
The manual is subject to change without notice.
3.
Although we tried hard to make this manual error free, if you find any errors or unclear passages, kindly
let us know.


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Important information is shown on the product itself and in the operation manual to protect users
from bodily injuries and property damages, and to enable them to use the product safely and
correctly.
Please be sure to thoroughly understand the meanings of the following signs and symbols
before reading the sections that follow, and observe the instructions given herein. Keep the
manual in a place you can easily access to whenever you need it.
[Explanation of Signs]
Sign
Description
WARNIN
G
Indicates a potentially hazardous situation which could result in
death or serious injury, if you do not follow the instructions in this
manual.
CAUTION
Indicates a potentially hazardous situation which may result in
minor or moderate injury
*1, and/or equipment-only-damage*2, if
you do not follow the instruction in this manual.
Note 1: Serious injury refers to cases of loss of eyesight, wounds, burns (high or low temperature),
electric shock, broken bones, poisoning, etc., which leave after-effects or which require
hospitalization or a long period of outpatient treatment of cure.
Note 2: Minor or moderate injury refers to cases of burns, electric shock, etc., which do not require
hospitalization or a long period of outpatient treatment for cure; equipment damage refers to
cases of extensive damage involving damage to property or equipment.
[Explanation of the Symbols]
Symbol
Description
This sign indicates PROHIBITION (Do not).
The content of prohibition is shown by a picture or words beside the symbol.
This sign indicates MANDATORY ACTION (You are required to do).
The content of action is shown by a picture or words beside the symbol.
This shape or symbol indicates WARNING.
The content of WARNING is shown by a picture or words beside the symbol.
Color back : red, flame, picture and words : black
This shape or symbol indicates CAUTION.
The content of CAUTION is shown by a picture or words beside the symbol.
Color back : yellow, flame, picture and words : black
SAFETY PRECAUTIONS
Yellow
Red


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For a safe use of the LQ500 Density Meter, take precautions described in this manual and
observe ordinances in making the installation and operation. Toshiba is not responsible for
any accident arising from the use that does not conform to above.
INSTALLATION PRECAUTIONS
WARNING
DO
The meter is heavy. To move
the meter for relocation or
installation, a qualified operator
must handle it by using
equipment such as a truck, a
crane or a sling.
In addition, when you lift the
meter with its lifting bolts, make
sure the bolts have been
securely tightened to the end.
Overturning or dropping can cause
injuries or equipment failure.
DO
Electrical work, installation
work are needed for the meter.
Please consult with the sales
agent you purchased the
meter, some of the companies
specialized in this field or your
Toshiba representative.
If any of these work items is
performed incorrectly, this can
cause fire or explosion.
DO
Electrical and mechanical
constructions are necessary for
the meter.
Please consult your vender or
Toshiba sales representative.
Inadequate construction can cause
electric shock and fire. (UL/CUL
hazardous locations type only)
DON'T
Do not operate where there
is a possibility of leakage of
flammable or explosive gas.
A fire or explosion can occur.
DON'T
EXPLOSION HAZARD-
Do not disconnect equipment
unless power has been
switched off or the area is
known to be non-hazardous.
A fire or explosion can occur.
(UL/CUL hazardous locations type
only)
DO
EXPLOSION HAZARD-
Install per the National
Electrical Code for the US
(NEC, ANSI/NFPA 70) and the
Canadian Electrical Code
(CEC, CAN/CSA- C22.1)
Unsuitable conduit connections for
hazardous location can cause
explosion. (UL/CUL hazardous
locations type only)
DON'T
EXPLOSION HAZARD-
Substitution of components
may impair suitability for class
, division2.
A fire or explosion can occur.
(UL/CUL hazardous locations type
only)
Red
SAFETY PRECAUTIONS (Continued)