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MFT70-US
Megger MFT70-US User Manual
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7
SAFETY W
ARNINGS
Symbols used on the instrument are:
G
Caution: Refer to accompanying notes
Maximum 300 V a.c. CA
T IV to Gr
ound
> 600 V
Maximum nominal system voltage of 600 V
f
Instrument protected by 2 x F2 1000 V 30 kA fuses
c
Equipment complies with current EU Dir
ectives
This equipment should be recycled as electr
onic waste
Equipment complies with ‘C tick’ requir
ements
12 V DC charger socket
6
8
Table of Contents
Default Chapter
2
Table of Contents
2
Safety Warnings
5
Live Ground Safety Precautions
6
Symbols Used on the Instrument Are
7
Introduction
8
Overview
8
Front Panel and Controls
8
Display
8
Display Symbols
9
Waste Electrical and Electronic Equipment
10
Battery and Fuse Location, Fitting and Replacement
10
To Replace Batteries or Fuse
10
For Battery Replacement
10
For Fuse Replacement
10
Rechargeable Batteries and Battery Charging
10
To Charge the Batteries
11
Operation
12
General Operation - All Models
12
Switching on
12
Switching off
12
Backlight
12
Test Buttons
12
Test Button Lock
12
Mode Button Functions
13
Test Inhibit
13
Insulation
13
Continuity
13
GFCI Testing
13
Ground Testing
13
Battery Exhausted
13
Voltage, Frequency, Current and Temperature Measurement
14
Making a Voltage Measurement
14
OR if Using the Mains Plug Lead SAI10
14
Frequency Measurement
15
Phase Rotation
15
Leakage Current Measurement
15
Temperature Measurement
15
Switch Probe
15
Continuity / Resistance Measurement
16
Nulling Test Lead Resistance (up to 9.99 Ohms)
16
To Null Test Leads
16
Making a Continuity Measurement
17
Storing / Downloading Results
17
Continuity Buzzer ON/OFF
17
Switch Probe (SP5)
18
Buzzer Threshold
18
Measurement Methods and Sources of Error
18
Method of Measurement
18
Possible Sources of Error
18
Insulation Resistance
18
Making an Insulation Measurement
19
Insulation Test Lock
19
Measurement Methods and Sources of Error
20
Ground Fault Current Interrupt (GFCI) Testing
20
Function Button Options
20
Ramp Test
20
Making a Measurement
20
Touch Voltage Display
21
Measurement Methods and Sources of Error
21
Useful Information
22
Ground Resistance Measurement
22
Connection Terminals
22
Touch Voltage Limit
22
Making a Measurement - Two Pole Resistance Measurement
22
Making a Measurement - Three Terminal Resistance Measurement
23
Making a Measurement - Three Terminal Resistance Measurement Using ART
24
Two-Clamp Stake-Less Measurement
25
Setup Options
26
Warning Messages
27
Startup Warnings
27
Battery
27
Battery Charger
27
Fuse Warning
27
Invalid Rotary Switch Setting
27
Continuity Test
27
Insulation Test
27
GFCI Test
27
GFCI Range Selection Errors
27
Test will Not Start
28
Contents
29
Sending, Storing, Deleting and Recalling Test Results
29
Folders
29
Circuit Type
29
Insulation
29
Gfci
30
Ground Testing
30
Storing Test Results in the Internal Memory
30
Deleting Test Results from the Internal Memory
30
Recalling Test Results to the Display
31
Sending Stored Test Results Via Bluetooth
31
Sending Individual (Blobbing) Test Results
31
Continuity Testing
32
GFCI Testing
32
Ground Testing
32
Bluetooth ® Pairing
33
Bluetooth ® Pairing (PC or Laptop)
33
General Information
34
Installation Category Definitions
34
Safe Working Practice
34
Cleaning and Maintenance
34
Ground Resistance Testing - Basic Principles
35
Principle of Operation (Three-Terminal Resistance Measurement)
35
Principle of Operation (Three-Terminal Resistance Measurement Using ART)
35
Principle of Operation (Two-Clamp Stake-Less Resistance Measurement)
36
General Specification
37
Repair and Warranty
39
Calibration, Repair and Spare Parts
39
Deceleration of Conformity
39
4
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Megger MFT70-US Specifications
General
Brand
Megger
Model
MFT70-US
Category
Test Equipment
Language
English
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