AEMC 4500 - 1 Introduction

Digital Ground Resistance Tester Model 4500 3
CHAPTER 1
INTRODUCTION
Warning
“It should be impressed on all personnel that a lethal potential can exist
between the station ground and a remote ground if a system fault involving
the station ground occurs while tests are being made. Since one of the
objects of tests on a station ground is the establishment of the location of
an effectively remote point for both current and potential electrodes, the
leads to the electrodes must be treated as though a possible potential
could exist between these test leads and any point on the station ground
grid.”
- excerpted from IEEE Std. 81-1962
These safety warnings are provided to ensure the safety of per-
sonnel and proper operation of the instrument.
• Theinstrumentmustnotbeoperatedbeyonditsspecied
operating range.
• Safetyistheresponsibilityoftheoperator.
• Allmetalobjectsorwiresconnectedtotheelectricalsystem
should be assumed to be lethal until tested. Grounding
systemsarenoexception.
• Useextremecautionwhenusingtheinstrumentaround
energized electrical equipment.
• Neverattempttousetheinstrumenttotwistorprythe
ground electrode or ground wire away from the equipment
being grounded.
• AEMC
®
Instruments considers the use of rubber gloves
tobeanexcellentsafetypracticeeveniftheequipmentis
properly operated and correctly grounded.
• Alwaysinspecttheinstrumentandleadspriortouse.
Replace any defective parts immediately.