Hoyt 2734 ER User manual

2734 ER
4-WIRE
EARTH RESISTANCE TESTER
INSTRUCTION MANUAL

INDEX Page
1.INTRODUCTION..................................... 1
2.SAFETY NOTES...................................... 2
3.FEATURES.............................................. 3
4.SPECIFICATIONS................................... 4
5.INSTRUMENT LAYOUT........................... 6
6.MEASURING METHODS........................ 7
7.MAINTENANCE....................................... 9

POWER LINE
SERVICE
ENTRANCE
1. INTRODUCTION
This meter has been designed and tested according to EN
61010-1, EN61326-1, EN61557-1, EN 61557-5 and other
safety standards.
Follow all warnings to ensure safe operation.
CAT IV - Measurements performed at the source of the
low-voltage installation
CAT III - Measurements performed in the building
installation.
CAT II - Measurements performed on circuits directly
connected to the low-voltage installation.
CAT I - Measurements performed on circuits not
directly connected to mains.
●Electronic
Equipment
●Outlets
and long
branch
circuits
●Feeders and short
branch circuits
●Distribution panel
devices
●Outside and service
entrance
●Service drop from
pole to building
●Overhead line to
detached building
CAT IV CAT III CAT II CAT I
- 1 -

2. SAFETY NOTES
● Read the followings safety information carefully before
attempting to operate or service the detector.
● Use the meter only as specified in this manual.
Otherwise, the protection provided by the meter may be
compromised.
● Rated enviromental conditions:
(1)Indoor & outdoor use.
(2)Installation & Category 200V.
(3)Pollution Degree2.
(4)Altitude up to 2000m
(5)Relative Humidity 80% max.
(6)Ambient temperature 0~40
● Observe the International Electrical Symbols listed below:
Detector is protected throughout by double
insulation or reinforced insulation.
Warning! Risk of electric shock.
Caution! Refer to this manual before using the
detector.
Earth (ground) terminal.
Equipment complies with current EU directives
- 2 -

- 3 -
3. FEATURES
● Microprocessor-controlled.
● 3½ digit(2000 counts)
● 68x34mm large LCD display.
● Earth Voltage measuring:0-200Vac
● Automatic C spike check
● 4-wire test only
● Auto power off
● Auto data hold
● Protective cover for terminals
● Robust, compact and easy carry.
● Meets: EN61010-1 CAT 200V
EN61326-1
EN61557-1
EN61557-5
- 3 -

SPECIFICATION4.
Measuring Ranges
Earth Resistance
0-20.00Ω/0-200.0Ω/0-2000Ω
Earth Voltage
0-200Vac
Accuracy
Earth Resistance
±(2%rdg+3dgt)
Earth Voltage
±(2%rdg+3dgt)
Earth Resistance
Resolution
0-20Ω:0.01Ω
0-200Ω:0.1Ω
0-2000Ω:1Ω
Measurement
System
Earth resistance by constant
current inverter 820Hz
approx. 2mA
Display LCD 3½ digit (2000 counts)
Low Battery
Indication
Over Range
Indication
Data Hold
indication
Auto-OFF
indication
Temperature &
Humidity
Operating:0-50≤80%R.H.
Storage:-10-60≤80%R.H.
Power Source 1.5V(AA)x6 batteries
Dimensions 205(L)x90(W)x55(D)mm
Weight Approx. 490g (batteries
included)
HOLD
APO
OL
- 4 -

Accessories
Test leads (red-15m,
black-10m,yellow-10m,
green-5m)
Auxiliary earth spikes x 3
Instruction manual
Batteries
Carry case
Notes:
Data Hold feature instructions:●
Press "TEST" button to begin test. When results are
displayed, press "TEST" button again for display.
Press "TEST" button again to resume test.
Auto-OFF feature instructions:●
To disable Auto-OFF feature, turn on the device to your
desired range. Push and hold the "TEST" button until
the display disappears (Approx. 3 sec).
HOLD
APO
- 5 -

- 6 -
①C1 terminal (Black test lead connection)
②P1 terminal (Green test lead connection)
③P2 terminal (Yellow test lead connection)
④C2 terminal (Red test lead connection)
⑤LCD display ⑩Function switch
⑥Rc LED
⑦Rp LED
⑧Noise LED
⑨Test button
E
Rc
CATⅣ
EARTH
VOLTAGE
OFF
200V
20Ω 200Ω 2000Ω
2734 ER
4-Wire Earth Resistance Tester
TEST
PRESS TO:
Switch ON,
TEST,
SCROLL RESULTS
Rp Noise
MICROPROCESSOR
CONTROLLED
C1 ES P1 S
Max.
AC 200V
P2 H C2
①
②③
④
⑤
⑥
⑦
⑧
⑨
⑩
5. INSTRUMENT LAYOUT

- 7 -
6. MEASURING METHODS
Battery voltage check
a.Before testing, rotate the function switch to "20Ω" range,
if the appears on the display, replace with new batteries.
b.Prior to measuring, if appears on the display,
replace with new batteries.
Do not apply voltage between the measuring
terminals at earth resistance measurements.
11 Earth voltage measurement:
(1)Test leads connection
5~10m
Auxiliary earth
spikes
Earthed electrode
under test
YellowGreen
(2)Rotate the function switch to"Earth Voltage" position,
earth voltage will display on the LCD. When earth voltage
is more than 10V. it may result in errors in earth resistance
measurement

2. Earth resistance measurement:
(1) Connection of Auxiliary earth spikes and test leads.
(2)Select a Ω range (20Ω, 200Ω or 2000Ω) when the
connection is done and press the "TEST" button.
(3)Take the reading on the display.
Avoid test leads twisting, tangling and making
contact with one another as this may affect the
measurement results.
Earthed electrode
under test
Red
Yellow
Green
Black
5~10m 5~10m
Auxiliary earth
spikes
- 8 -

Notes:
Check the following prior to proceeding with measurement:
1.Checking if Auxiliary Earth Spikes are connected
correctly when the "Rc" LED lit.
2.Indicator for "Rc" & "Rp"
Rc: When the "Rc" LED is lit, this is an indicaton
that there is no test current output.
Rp: When the "Rp" LED is lit, the "R" value on the
LCD will display "OL", This is an indicaton that
test Earth Resistance value is over 2 range.
3.Indication for "Noise":
When the "Noise" is lit, this is an indication that
there is possible interference at the testing circuit
- 9 -

7. MAINTENANCE
When the appears on the display, replace the batteries
as follows:
WARNING
Do not mix new and old batteries together.
Battery replacement:
(1)Disconnect the test leads from the instrument and
remove the battery cover and the batteries.
(2)The batteries are situated under the tester.
(3)Replace with six 1.5V AA light batteries, taking care to
observe correct polarity.
(4)Reinstall battery holder and the battery cover.
Battery
Battery
Battery
Battery
Battery
Battery
- 9 -

- 10 -
Due to our policy of constant improvement and development,
SEW reserves the right to change specifications without
notice
Periodically wipe the case with a damp cloth and
detergent. Do not use abrasives or solvents.
WARNING
To avoid electrical shock or damage to the meter,
do not get water inside the case.
Cleaning and storage: