Besantek BST-ET103 User manual

EARTH RESISTANCE
& RESISTIVITY TESTER
INSTRUCTION MANUAL
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

INDEX
1. INTRODUCTION.....................................
2. SAFETY NOTES.....................................
3. FEATURES..............................................
4. SPECIFICATIONS...................................
5. INSTRUMENT LAYOUT..........................
6. MEASURING METHODS........................
7. MAINTENANCE......................................
Page
1
2
3
4-5
6
7-10
11-12

-1-
1. INTRODUCTION
This tester has been designed and tested according to
EN 61010-1, EN 61326-1, EN 61557-1, EN 61557-5 and
other safety standards. Follow all warnings to ensure safe
operation.
The tester meets EN 61010-1 CAT IV 300V Electrical
test & measurement tools are assigned to 4 different
designations from CAT I-IV (category) rating. The higher
the category, the more risk there is that a high voltage
can overload a circuit and cause electrical and physical
damage. Usually, the higher the CAT rating, the safer the
rating.

-3-
3. FEATURES
●Auto-Rating microprocessor controlled.
● Earth resistivity (ρ) test.
● Earth testing at 20Ω, 200Ω, 2000Ω.
●Earth Voltage measuring: 0-300V AC
●Automatic C spike check.
●Automatic P spike check.
●2-Wire test, 3-Wire test, 4-Wire test.
●LCM display.
●Auto power OFF.
●Data hold.
●200 measurement results can be saved in the memory
and recalled on the display.
●Interval between auxiliary earth spikes is 1.0~50.0m.
●EN 61010-1 CAT IV 300V
IEC 61557-1 IEC 61557-5
EN 61326-1
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

-4-
4. SPECIFICATIONS
Measuring Ranges
Earth Resistance
0-20Ω, 0-200Ω, 0-2000Ω
Earth Resistivity
0.06~6.28 kΩ.m
0.62~62.8 kΩ.m
6.28~628 kΩ.m
Earth Voltage
0-300V AC
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
Measuring System Earth resistance by constant current
Inverter 820Hz approx. 2mA
Temperature &
Humidty
Operating:0℃~40℃≤80%R.H.
Storage:-10℃~50℃≤80%R.H.
Power Source 1.5V(AA) x 8
Dimensions 250(L) x 190(W) x 110(D)mm
Weight Approx. 1500g (battery included)
Accesories
Test leads (red-15m, black-10m,
yellow-10m, green-5m)
Auxiliary earth bars
Instruction manual
Carry case
Shoulder belt
Batteries

-5-
●Maximum Operating Error
Operating error (B) is an error obtained within the rated
operating conditions, and calculated with the intrinsic
error (A), which is an error of the instrument used, and
the error (En) due to variations.
B=±(|A|+1.15√E2
2+E3 2+E4 2+E5 2)
A: Intrinsic error
E2: Variation due to changing the
supply voltage
E3: Variation due to changing the
temperature
E4: Variation due to series
interference voltage
E5: Variation due to resistance of
the probes and auxiliary earth
electrode resistance
●Range to keep the maximum operating error
Measurement range within which the maximum
operating error (±30%) applies.
20Ω Range : 5 ~ 19.99Ω
200Ω Range : 20 ~ 199.9Ω
2000Ω Range : 200 ~ 1999Ω

-6-
5. INSTRUMENT LAYOUT
1. C1 terminal
(Black test lead connection)
6. Rc LED
7. Rp LED
2. P1 terminal
(Green test lead connection)
8. SAVE button
9. Cursor button
3. P2 terminal
(Yellow test lead connection)
10. Cursor button
11. ESC button
4. C2 terminal
(Red test lead connection)
12. Power button
13. TEST/STOP button
5. LCM display
1. 2. 3. 4.
5.
6.
7.
8. 9. 10. 11. 12.
13.

-12-
1. Press the "ON/OFF" button to turn off the power,
and disconnect the test leads from the instrument.
2. Open and remove the battery cover.
3. Replace the fuse with new one. (0.5A/500V
5x20mm)
4. After replacing the fuse, reattach the cover and
secure with the screws.
●Cleaning and Storage
WARNING
To avoid electrical shock or damage to the meter, do
not get water inside the case.
Periodically wipe the case with a damp cloth and
detergent: do not use abrasives or solvents.
Cover
Battery
Fuse
(0.5A/500V)

H35
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com