B&K Precision 309 User Manual

Instruction Manual

Model 309 Digital Earth Resistance Meter

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(1) Jack For "EARTH" Lead

Connection
(2) Operation Indicator
(3) Data Hold Switch
(4) Timer Off Button
(5) LCD Display

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W

(6) Jack For "LINE" Lead

Connections
(7) Function Switch
(8) Ohm Range Switch
(9) Pushbutton Operation
(10)Timer On Button

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1.INTRODUCTION

NOTE
This meter has been designed and tested according to
IEC Publication 348, safety Requirements for
Electronic Measuring Apparatus, IEC-1010 (EN 61010)
and other safety standards. Follow all warnings to
ensure safe operation.

WARNING

READ "SAFETY NOTES" ( NEXT PAGE )

BEFORE USING THE METER.

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2.SAFETY NOTES

Ÿ Read the following safety information carefully

before attempting to operate or service the meter.

Ÿ Use the meter only as specified in this manual.

otherwise, the protection provided by this meter
may be impaired.

Ÿ Rated environmental conditions

(1). Indoor Use.
(2). Installation Category III.
(3). Pollution Degree 2.
(4). Altitude up to 2000 meter.
(5). Relative humidity 80% max.
(6). Ambient temperature 0~40 C

Ÿ Observe the International Electrical Symbols listed

Below

Meter is protected throughout by double
insulation or reinforced insulation.

Warning ! Risk of electric shock.

Caution ! Refer to this manual before using the
Meter.

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