Yokogawa PR300 Power and Energy Meter - Manual (Page 3)

ii IM 77C01E01-01E
Notices
■
Regarding This User’s Manual
• This manual should be passed on to the end user. Keep the manual in a safe place.
• Read this manual carefully to gain a thorough understanding of how to operate this product before you
start using it.
• This manual is intended to describe the functions of this product. Yokogawa Electric Corporation
(hereinafter referred to as Yokogawa) does not guarantee that these functions are suited to the
particular purpose of the user.
• Under absolutely no circumstances may the contents of this manual, in part or in whole, be transcribed
or reproduced without prior consent.
• The contents of this manual are subject to change without prior notice.
• Every effort has been made to ensure accuracy in the preparation of this manual. Should any errors or
omissions come to your attention however, please contact your nearest Yokogawa representative or
our sales office.
■
Regarding Protection, Safety, and Prohibition Against Unauthorized Modification
• In order to protect the product and the system controlled by it against damage and ensure its safe use,
be certain to strictly adhere to all of the instructions and precautions relating to safety contained in this
document. Yokogawa does not guarantee safety if products are not handled according to these
instructions.
• The following safety symbols are used on the product and/or in this manual.
● Symbols Used on the Product and in This Manual
This symbol on the product indicates that the operator must refer to an explanation in the user’s manual
in order to avoid the risk of injury or death of personnel or damage to the instrument. The manual
describes how the operator should exercise special care to avoid electric shock, electrocution or other
dangers that may result in injury or loss of life.
Protective Grounding Terminal
This symbol indicates that the terminal must be connected to ground prior to operating the equipment.
CAUTION
●
Power supply
Check that the voltage of the power supply agrees with the rated supply voltage of the Meter.
● Protective grounding
To avoid electric shock, be sure to provide protective grounding before turning on the Meter.
● Need for protective grounding
Do not cut the internal or external protective grounding conductor of the Meter or disconnect the
conductor from the protective grounding terminal. In either case, the protective functions of the
Meter will become ineffective, resulting in a hazardous situation.
●
Defect of protective grounding
If the protective functions of protective grounding or fuses are assumed to be defective, do not
operate the Meter. Before putting the Meter into operation, check that the protective functions are
normal.
● Use in a gaseous environment
Do not put the Meter in operation in a location where any combustible or explosive gases or fumes
are present. It is extremely dangerous to use the Meter under such conditions.
● Removal of casing
No person except Yokogawa service personnel is allowed to remove the casing. Removing the
casing is hazardous since the Meter contains high-voltage parts.
● External wiring
Securely provide protective grounding before wiring the Meter to the measuring object or external
control circuit.
● Damage to protective construction
Operating the Meter in a way not described in this manual may impair the protective construction of
the Meter.