1
I
Safety
Instructions
Thank
you
for
purchasing
the
Clamp
-
on
Ground
Resistance
of
our
company
and
for
the
full
use
of
the
product
,
please
:
Read
the
user
manual
carefully
.
observe
the
operation
notes
listed
in
the
manual
.
Under
no
circumstances
shall
fail
to
pay
attention
to
the
safety
in
using
the
clamp
meter
.
Pay
attention
to
the
stipulate
measurement
scope
and
operation
environment
.
The
instrument
shall
apply
to
ground
resistance
testing
instead
of
the
current
of
power
frequency
power
wire
,
or
it
will
affect
the
clamp
'
s
magnetic
property
and
the
accuracy
of
ground
resistance
testing
finally
.
Pay
attention
to
the
labeled
words
on
the
surface
board
and
backboard
.
Before
start
it
,
pull
the
trigger
once
or
twice
to
confirm
the
jaw
of
clamp
can
close
or
open
freely
.
When
starting
it
,
don
'
t
pull
the
trigger
and
clamp
any
wires
.
Clamp
the
objects
being
tested
only
after
displaying
the
sign
OL
after
started
the
instrument
.
UT276A
/
278A
OPERATING
MANUAL
UT276A
/
278A
OPERATING
MANUAL
7
Alarm
Function
Setting
8
Alarm
Critical
Value
Inquiry
9
Data
Wipe
10
Data
Uploading
to
Computer
VIII
Measurement
Principles
1
Resistance
Measurement
Principle
2
Current
Measurement
Principle
IX
Ground
Resistance
Measurement
Method
1
Multi
-
point
Ground
System
2
Limited
Point
Ground
System
3
Single
Point
Ground
System
X
On
-
site
Application
1
Application
of
Power
System
2
Application
of
Telecommunication
System
3
Application
of
the
building
lightning
protection
ground
system
4
Application
of
the
gas
station
ground
system
XI
Notes
about
Ground
Resistance
Measurement
Appendix
:
loop
Resistance
Analysis
6
Data
Inquiry
24
25
26
27
27
28
28
29
30
30
31
33
38
38
39
41
42
46
50
Summary of Contents for UT276A
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