EARTH TESTER FT6031-50

Tough and Ready for the Field
IP67

Dustproof and Waterproof

Wireless support

WIRELESS ADAPTERZ3210

Compatible with wireless adapter Z3210 (optional). It transfers measurements toyour smartphone or tablet and allows you to quickly create reports with field photos
and drawings.

2Field-tough. Site-ready.
So you can get down to work.
Introducing an earth resistance tester engineered to handle dirt with true grit

Vibration-resistant design
Drop-proof

The FT6031-50 is engineered towithstand being dropped onto
concrete from a height of 1 m.

IP67

IP67 protection, even with the terminal caps open

No ingress of water even if temporarily
submerged under defined conditions ofpressure thanks to watertight design
No ingress of dust thanks to dust-proof enclosure

Large, easy-to-readydisplay
The FT6031-50's large LCD panelfeatures a wide viewing angle for
improved visibility outdoors.

Automatic pre-check
The FT6031-50 automatically checks
cables for line breaks and the ground
potential (noise) before measurement.
A warning is shown if either checkyields a FAIL result, allowing you toquickly assess the situation.

Cable
break
Groundpotential
faultHigh precision &zero-adjustment

The FT6031-50 delivers highaccuracy of ±1.5% rdg. ±8 dgt.
The zero-adjustment function aids indelivering even better accuracy bycanceling the wiring resistance oflong measurement cable runs.

Two- or three-electrodemeasurement
Choose either two- or three-electrodemeasurement. Automatic switching ofconnections internally eliminates the need
to use a short bar or other apparatus.

Ground types
TypeClass A

Locations used
Special high voltage,high voltage
Class BAs perTransformer neutralcalculations
point
Class C 10 Ω/500 Ω*Low voltages inexcess of 300 V
Class D 100 Ω/ 500 Ω* Low voltages of 300 Vor less*With ground-fault interrupter that trips within 0.5 sec.

Three-electrode measurement(for measurement classes A through D)

Measurement is performed after
inserting a auxiliary grounding rod into
the soil. For accurate measurement,
position E-S(P)-H(C) in a straight line at
an interval of about 5 to 10 m.

5 to 10 m 5 to 10 m
Pole-mounted transformer

Criterion
10 ΩTwo-electrode measurement
Max. 250 V ACClass B groundAt least 5 m(for measurement class D)

Class D ground installations can bemeasured by using the Class B ground of apole-mounted transformer. The measured
value will include the resistance value of theClass B ground. The distribution panel’s
main ground terminal is typically connectedto the power supply’s ground line.

3

Fast-track preparations, measurement, and cleanup.
Thin for a reason

Since variations in the thicknessof auxiliary grounding rods cause
almost no change in their
grounding resistance, theFT6031-50 uses thinner rods thatare easier to drive into the ground.

Prep
BeforeYou only need to do it once…

The tolerance for the supplemental grounding
electrode’s resistance has been increased by a factorof 10, eliminating the inconvenience of inserting and reinserting auxiliary
grounding rods over and over again every time the resistance tolerance is
exceeded due to dry soil or other non-optimal conditions.

Repeated insertions
Before

After

After

4 attempts needed1

Thick rods had to behammered into the groundand were difficult to remove.

324

The FT6031-50 automatically checks theground potential, checks the auxiliary
grounding electrode, and measures thegrounding resistance. Auto-ranging operation
eliminates the need to switch ranges, enabling
efficient measurement.

It’s easy to check the auxiliary grounding
electrode’s resistance value and theground potential value.
S(P) electrode/H(C) electrode resistance value

MEASURE

Auxiliary
groundingelectrode check

Ground potential value▲▲

Groundpotential
check

Shorter
worktimes

The FT6031-50 uses hard,rust-resistant rods made ofstainless steel.

You need only press the MEASURE button.

Measurement

Single insertionGrounding resistancemeasurement(Auto-ranging)

Toggle with the Fn button.

Tangle- and twist-free measurement cord winders

Cleanup Easily rewind

measurement cords,
even if they’re 20 m long.

Measurement cord retrieval is a time-consuming part ofgrounding resistance measurement. The FT6031-50's
newly developed winders allow cords to be rewoundabout twice as quickly as with conventional reels.
Auxiliary grounding rods
can be stowed here.

Insert this plug into the instrument’s
S(P)/H(C) terminal and pull out the cord.

Specifications(Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Measurement system

Range configuration

Measuring frequency
Measuring timeTwo-electrode method/three-electrode method (switchable)
Resolution
Range
Display range(auto range)
3 electrode2 electrode20 Ω
0 to 20.00 Ω0.01 Ω*1200 Ω
0 to 200.0 Ω
0.1 Ω1Ω
2000 Ω
0 to2000 Ω
1Ω
1Ω
128Hz±2Hz

Accuracy±1.5 %rdg.±8 dgt.
±1.5 %rdg.±4 dgt.
±1.5 %rdg.±4 dgt.

Three-electrode method: Within 6 seconds (effective measurement time including ground potential check and auxiliary grounding
electrode check: 3 sec. [representative value]), Two-electrode method: Within 3 seconds

Measurement current
Three-electrode method: 25 mA rms or less, Two-electrode method: 4 mA rms or less
Resistance tolerance of20 Ω range: 5 kΩ, 200 Ω range: 50 kΩ, 2000 Ω range: 50 kΩ
auxiliary earthing electrode
Earth potential measurement 0 to 30.0 Vrms Accuracy: ±2.3 %rdg.±8 dgt. (50/60Hz), 1.3 %rdg.±4 dgt. (DC)Allowable earth potential
25.0 Vrms (DC or sine wave)Operating temperature-25℃ to 65℃ (-13℉ to 149℉)-25°C to 40°C: 80 % rh or less (non-condensing) 40°C to 45°C: 60 % rh or less (non-condensing)Operating humidity
45°C to 50°C: 50 % rh or less (non-condensing) 50°C to 55°C: 40 % rh or less (non-condensing)
55°C to 60°C: 30 % rh or less (non-condensing) 60°C to 65°C: 25 % rh or less (non-condensing)
Storage temperature and humidity -25°C to 65°C: 80 % rh or less (non-condensing)Operating environment
Indoor, outdoor (excluding farmland*2) pollution degree 3, altitude up to 2,000 (6,562-ft.)
Power supply
LR6 Alkaline battery × 4
Possible number of mea500 times (measurement conditions: three-electrode method, auxiliary earthing electrode resistance 100 Ω, measuring 10 Ω at thesurements on new batteries 20 Ω range in 10-second intervals without Z3210 installed)
Dustproof and waterproof
IP65/IP67 (EN60529)
Drop-proof
1 m above concrete (with protector attached)
Maximum rated voltage to100 V AC/DC (measurement category IV), 150 V AC/DC (measurement category III), 300 V AC/DC (measurement category II),
earth
anticipated transient overvoltage 2500 V
Live wire warning, zero-adjustment, continuous measurement mode, radio communication (only when Z3210 is installed), comparator
FunctionsApplicable standards
Safety: EN 61010 (main unit), EN 61010 (measuring circuit)
EMC: EN 61326
Earth tester: EN 61557
Dimensions
185 W × 111H × 44D mm (7.28” W × 4.37” H × 1.73” D) (including protector, excluding terminal covers)
Mass
570 g(20.1 oz.) (including batteries and protector, excluding other accessories)
Auxiliary Earthing Rod L9840 (2 piece set) ×1, Measurement Cable (alligator clip, black 4 m) L9841×1, Measurement Cable (yellow 10 m, equipped with winder)
Accessories
L9842-11×1, Measurement Cable (red 20 m, equipped with winder) L9842-22×1, Carrying Case ×1, Protector×1, LR6 Alkaline battery ×4, Instruction manual×1*1 If the auxiliary grounding resistance is 5 kΩ or greater, 0.1 Ω.

Model : EARTH TESTER FT6031-50
Model No. (Order Code)*2 According to the requirements regarding the limits for open-circuit voltage in EN 61557-5

Add wireless communication capability by connecting WIRWLESS ADAPTER Z3210

FT6031-50

WIRELESS ADAPTER
Z3210

FT6031-50

Accessories

AUXILIARY EARTHING ROD
L9840

Transfer measurements to your phoneor tablet. Generate reports with site photos
and drawings with theFor more information,
free app GENNECT
visit the GENNECTCross
Net website.

Options

MEASUREMENT CABLE
L9842-11(Yallow), -22(Red)MEASUREMENT CABLE
L9843-51(Yallow), -52(Red)EARTH NETS
9050

2 piece set,
270 mm (10.62”) length,
φ 6 mm (0.24”)-11: 10 m (32.81 ft) length,
Red 20 m (65.62 ft) length,equipped with winder

Each 50 m (164.06 ft) length,
equipped with flat cable winder

2 sheets in set,
300 mm × 300 mm (39.37″ × 39.37″)

MEASUREMENT CABLE
L9841

CARRYING CASE
C0106

MEASUREMENT CABLE
L9844

TEST LEAD
L9787

Alligator clip, black 4 m (13.12 ft)
length324 mm W × 310 mm H × 125 mm D(12.8″ W × 12.2″ H × 4.92″ D)

For earthing terminal board, red/yellow/black 1.2 m (3.94 ft) each length

For simplified measurement method, indoor use
only, red and black 1.2 m (3.94 ft) each length

WIRELESS ADAPTER
Z3210

Bluetooth® For additional wirelesscommunication functions

For more information on supported regions and products,
please visit this dedicated site.

Note: Company names and product names appearing in this catalog are trademarks or registered trademarks of various companies.
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by HIOKI E.E. CORPORATION is under license.

DISTRIBUTED BY

HEADQUARTERS
81 Koizumi,Ueda, Nagano 386-1192 Japan
https://www.hioki.com/

All information correct as of July 6, 2020. All specifications are subject to change without notice.

FT6031-50E1-07B

Printed in Japan