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MFT1845+
Multifunction Tester
DESCRIPTION
The MFT1845+ multifunction tester is an instrument
designed for testing low voltage electrical installations and
especially in locations that suffer from high electrical noise.
It provides all the tests required to complete the necessary
electrical certification for industrial, commercial and
domestic fixed wiring installations, and includes:
TRMS System voltage and frequency
measurement
Insulation test at 100 V, 250 V, 500 V and 1000
V Including input protection against live circuits
up to 600 V even when insulation test is locked-
on
Continuity resistance at 200 mA or 15 mA
Automatic start - no need to press TEST so
leaving both hands free to hold probes
Resistance range up to 100 kΩ with fast
continuity buzzer at selectable thresholds
TrueLoop™ enhanced non-trip technology:
• New 3 wire non-trip technology
• New confidence meter measurement
• 2 and 3 wire non-trip range
• 2 wire Hi current including phase to phase
• Prospective fault current measurement up to
20 kA
RCD testing including:
• Type ac, A, S, B and programmable RCDs
• Testing of Electric Vehicle Charge Points
RCDs*
• 3-phase RCDs
• Auto-test routine
• EV Charge Point RCD Testing
Earth spike testing
• 2-pole/3-pole**, ART** and Stake-less**
techniques
TrueLoop™ Enhanced non-trip loop impedance
measurement technology:
The MFT1845+ includes a new non-trip loop testing
technology that:
Prevents any influence the RCD may present to
the total loop impedance value.
Faster non-trip loop testing down to 8 seconds.
This technique also allows testing of loop impedance
through 10 mA type ac and Type A RCDs.
Confidence meter measurement analysis ™
Overlaying the new non-trip loop impedance measurement
is the Megger Confidence meter™. As loop impedance
values can be dramatically affected by circuit noise, the
Confidence Meter displays the degree of confidence in the
accuracy of the measured loop impedance. Using the digital
ARC to indicate the analytical process, the measurement
is continually monitored and adjusted when circuit noise is
present, resulting in a dramatically improved and repeatable
test result.
Electric vehicle charge point testing
The MFT1845+ includes an automatic EV Charge Point RCD
test sequence, including the 6 mA dc test*. Test results can
be reviewed or saved to memory and reviewed later.
* EVCA Adapter Accessories required
** Earth Test and Current Measurement Accessories required
■Testing of Electric Vehicle Charge Points*
■TrueLoop™ Enhanced non-trip loop impedance
measurement technology
■Full single and 3 phase compliant installation
testing
■10 mA to 1 A single and 3 phase RCD testing
■Earth testing and stake-less testing for electrode
resistance measurement**
■Simple colour-coded test selection
■Ambidextrous operation
■Internal memory and Bluetooth® communications
■EN61010 CAT IV safety rating and tough IP54 case
MFT1845+
Multifunction Tester
APPLICATIONS:
The MFT1845+ offers a wide range of test functions,
designed for all electrical installation testing and verification
of low voltage building wiring and distribution testing
scenarios. The MFT1845+ is IEC 61010 CAT IV 300 V rated
for safe connection anywhere within the LV network on
single and 3 phase systems.
The unique modern styling allows it to be operated while
stood on the floor, whilst up a ladder or platform, and
optimised for hanging around the user’s neck. Dual TEST
and LOCK buttons - one pair at each end - makes the
testers easy to operate left or right handed.
General features:
Quick to pick up and use, the function controls are colour
coded to make range selection easy and fast. They also
reduce the chance of using the wrong function or range.
The large crystal clear backlit display uses the Megger
digital/analogue arc, providing indication of fluctuating
readings while the dual digital readout shows precise
values of key measurements simultaneously with the test
parameters, such as the output voltage on insulation testing
as well as the resistance value in MΩ.
Visible and audible safety warnings are paramount when
testing high-energy systems and the MFT1845+ includes
full input protection and safety warnings when a hazardous
voltage is present. If live voltages exist on a circuit during
insulation or continuity testing, the voltage is displayed on
the screen. If this voltage exceeds a safe level, further testing
is inhibited and a warning beep sounds. The MFT1845+
features internally rechargeable batteries and charger with
a charge time of less than 4 hrs, so reducing the cost of
ownership.
The new MFT1845+ has been designed for tough
environments and ultimate reliability. Features include
a rubber over mould for extra protection and grip, IP54
protection against dust and water and an EN61010 CAT IV
safety rating. Its class leading input protection ensures the
MFT can withstand accidental misuse and voltage transients
when other testers can’t. All this in an intuitive and easy
to use instrument with no hidden menus or complicated
screens. Included with the instrument: standard 3-wire
lead-set and a mains test lead, a switched probe for fast
and easy testing, a full 12-month calibration certificate and
warranty upgradeable to 3 years warranty free of charge.
The MFT1845+ is supplied in a large soft pouch with plenty
of additional space for optional extras like a few tools and
the earth electrode test kit, comprising 2 spikes and 3 long
test leads.
PRODUCT SELECTION CHART
Insulation ranges MFT1845+
100 V
n
250 V, 500 V
n
1000 V
n
Test voltage display
n
Adjustable buzzer threshold
n
Continuity and resistance ranges
200 mA test
n
15 mA test
n
Adjustable buzzer threshold
n
RCD tests
1/2, 1, 5 x I and ramp RCD test
n
2 x I
n
Fast ramp
n
Auto RCD test
n
Type A, AC and RCDs
n
Type S RCDs
n
Type B (pure DC) RCDs
n
Programmable RCD
n
3-phase RCD (no earth)
n
10 mA
n
10, 30, 100, 300 and 500 mA RCD
n
Auto sequence for EV charge point RCDs*
n
Loop testing
2 and 3 wire non-tripping L-PE
n
2-wire high current L~L and L~N
n
50 V to 480 V (L~N) ,50 V to 280 V (L~PE)
n
Phase to Phase tests (L~L)
n
PSCC and PFC (20kA max)
n
Touch-voltage display (0 V~253 V)
n
Earth test
2 pole **
n
3 pole **
n
3 pole ART technique **
n
Stakeless method **
n
Other features
Supply measurement
n
True RMS
n
Current measurement **
n
Phase rotation
n
Backlight
n
Auto power-down
n
Calibration certificate
n
Rechargeable batteries / charger included
n
SP5 Switched probe included
n
3-year warranty (on registration)
n
On board memory with Bluetooth
®
download
n
CAT IV 300 V / CATIII 600 V
n
IP54
n
Confidence meter noise reduction
n
New hardware loop test platform
n
* EVCA Adapter Accessories required
** Earth Test and Current Measurement Accessories required
MFT1845+
Multifunction Tester
SPECFICATIONS
Insulation test
Output voltage -0% +20% at rated load or less
Voltage display ±3% ±3 digits ±0.5% of rated voltage
Short circuit current 1.5 mA nominal test current
Test current on load 1 mA at min pass values of insulation
Insulation accuracy
1000 Volts 10 kΩ ~ 999 MΩ ±3% ±2 digits
500 Volts 10 kΩ ~ 500 MΩ ±3% ±2 digits
>500 MΩ±10% ±4 digits
250 Volts 10 kΩ ~ 250 MΩ ±3% ±2 digits
>250 MΩ ±10% ±4 digits
100 Volts 10 kΩ ~ 100 MΩ ±3% ±2 digits
>100 MΩ ±10% ±4 digits
Resistance and continuity
0.01 Ω ~ 99.9 Ω ±2% ±2 digits
100 Ω ~ 99.9 kΩ ±5% ±2 digits
Open circuit voltage 5 V ±1 V
Test current (0 Ω ~ 2 Ω)
205 mA ±5 mA
15 mA ±5 mA (user selectable)
Loop test
Live to earth/neutral supply
48 V ~ 280 V (45 Hz ~ 65 Hz)
Live to live supply 48 V ~ 500 V (45 Hz ~ 65 Hz)
L-N/L-L tests ±5% ±3 digits
L-E tests
†
0.1 Ω ~ 39.9 Ω ±5% ±5 digits ± noise margin
40.0 Ω ~ 1000 Ω ±10% ±5 digits
Display range 0.01 Ω ~ 999 Ω
Live to earth PFC range 20 kA
Live to live PSCC range 20 kA
†
Reference conditions apply
For test environments see service data
RCD tests
Supply up to 100 mA 48 V ~ 480 V (45 Hz ~ 65 Hz)
Supply up to 1 A 48 V ~ 280 V
RCD type Type ac, A, S
Type B (pure dc)
No trip test (1/2xI) –10% ~ –0%
Trip test (1xI, 2xI and 5xI) +0% ~ +10%
EV 30 mA ac, 6mA dc (Mode 1 + 2)
Ramp test
Touch voltage (0 ~ 253 V) +5% +15% ±0.5 V
Trip time ±1% ±1 ms
Trip current ±3%
Step increments
VAR (variable RCD selection)
10 mA ~ 50 mA 1 mA steps
50 mA ~ 500 mA 5 mA steps
500 mA ~ 1000 mA 10 mA steps
Supply measurement
Voltage 10 V ~ 600 V
(15 ~ 400 Hz) True RMS
±3% ± 1 V ±2 digits
Phase rotation indication
L1–L2–L3 and L1–L3–L2
Frequency 15 Hz ~ 99 Hz ±0.5% ±1 digit
100 Hz ~ 400 Hz ±2.0% ±2 digits
Frequency resolution 0.1 Hz
Power supply
Batteries IEC LR6 type AA alkaline
(6 cells - supplied)
or 1.2 V NiMH
(rechargeable pack of 6 – supplied)
Mains charger for on-board re-charging (4 hours typical) 12 V car
charger (cigar lighter lead - optional)
Earth / ground test
Resolution 0.01 Ω
Current 0.45 mA or 4.5 mA
Noise rejection 20 V pk/pk (7 V rms)
Max probe resistances Rp and Rc
100 kΩ @ 50 V
5 kΩ @ 25 V
2 and 3 pole method (0.01 Ω ~ 1.999 kΩ)
±2.0% ±5 digits
ART method (1.00 Ω ~ 1.999 kΩ)
±5.0% ±5 digits
Stakeless method (1.00 Ω ~ 199 Ω)
±7.0% ±5 digits
Current
(via optional clamp meter)
±5.0% ±3 digits.
Range 0.1 mA to 200 A ac
Resolution 0.1 mA
mV sensor input
Including temperature (third party module)
±1.0% ±2 digits
Range 0.0 mV to ±199.9 mV dc
Resolution 0.1 mV
Data storage
Capacity: 1000 results
Bluetooth
®
communication
Produktspecifikationer
| Varumärke: | Megger |
| Kategori: | mätning |
| Modell: | MFT1845 |
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