LEM SATURN GEO plus User manual

Operating Instructions /
Gebrauchsanleitung /
Manuel d‘utilisation /
Guida all‘uso /
Manual de instrucciones
EARTH/GROUND TESTER /
ERDUNGSMESSER /
APPAREIL DE MESURE DE TERRE /
MISURATORE DI TERRA /
MEDIDOR DE RESISTENCIA DE TIERRA
SATURN GEO plus
plusplus
plus
ELMES •
••
•HEME •
••
•NORMA

Order Reference
- 2 -
Order Reference Order No.
SATURN GEO plus
plusplus
plus ..................................................................A 1855 06711
Scope of delivery
6 alcaline AA - type (LR6) batteries
2 measuring leads 1,5 m
1 connector cable (for RA 2-pole measurements)
2 alligator clips
1 carrying belt and hooks
1 operating instructions with CE-certificate
1 LEM NORMA test certificate
Recommended accessories:
Set for 3-pole measurements:.........................................A 6045 10302
2 x 1 earth stake ........................................................... A 6045 10350
1 cable reel with 25m wire ............................................ A 6045 05102
1 cable reel with 50m wire ............................................ A 6045 05103
Set for 4-pole measurements:.........................................A 6045 10301
4 x 1 earth stake .......................................................... A 6045 10350
2 x 1 cable reel with 25m wire .....................................A 6045 05102
1 cable reel with 50m wire ............................................ A 6045 05103
Set for stakeless measurements
for SATURN GEO
plus
plusplus
plus ..............................................A 6045 10307
1 Clip-on current transformer 100 A AC (sensing)..... A 6805 01007
1 Clip-on current transformer PR1200ACI
(inducing) .............................................................. 60.95.62.001.0
1 Shielded cable for clamp connection ...................... A 6002 09300
Carrying case
For SATURN GEO plus and accessories ...................A 6030 00530
For SATURN GEO plus and accessories like
current probes ..................................................................ST0010Z
Unpacking: Check delivery for damage during transport.
Keep the packing material for later transport and check
scope of delivery.

Contents
- 3 -
Contents:
1 Safety Regulations ............................................................................... 4
2Description of instrument.................................................................... 5
3SETUP ................................................................................................... 6
4RA 2-pole, 3-pole measurements........................................................ 7
5RA 4-pole measurements .................................................................... 8
6RA3-pole selective earth resistance measurement with current
clamp..................................................................................................... 9
7 RA4-pole selective earth resistance measurement with current
clamp................................................................................................... 10
8Stakeless ground loop measurement .............................................. 11
9Troubleshooting................................................................................. 12
10 Technical Data.................................................................................... 14
11 Maintenance, Service, Warranty ....................................................... 17
12 Other products ................................................................................... 19

Safety Regulations
- 4 -
1 Safety Regulations
This measuring device is only to be installed and operated by qualified
personnel and according to the technical data in compliance with the safety
precautions and regulations set forth below. Additionally, the use of this
equipment requires compliance with all legal and safety regulations
pertaining to each specific application. Similar regulations apply to the use of
accessories.
Operating electrical devices implies that parts of the device carry dangerous
voltages. Disregarding warning notices may lead to serious physical injury
and material damage.
It can be assumed that safe operation is no longer possible if the device
• shows visible damage,
• has been exposed to unfavourable conditions (e.g. storage beyond the
permissible climatic limits without adaptation to the ambient climate, dewing etc.) or
• has been exposed to major strain during transport (e.g. been dropped from
some height without visible external damage etc.).
No measurements must be performed on unprotected measuring circuits.
While a measurement is in progress no earth stake must be touched!
Qualified Personnel
are persons familiar with the setting up, installation, starting off and operation of the
device and possess a formal qualification required for such activities.

Description of Instrument
- 5 -
2 Description of instrument
This instrument has been manufactured complying with quality assurance system
DIN ISO 9001. The compliance with the actual EMC-regulations is documented by
the attached CE-sign.
This instrument is suited for measurements according to IEC 1024, ENV
61024, DIN VDE 0185 and ÖVE-E 49.
Application:
• Earth resistance measurements in different installations (e.g. high voltage
pylons, buildings, mobile communication stations, HF transmitters etc.)
• Monitoring and planing of lightning protection systems
• Resistance measurements with earth electrodes; no separation
10 9
5
6
8
7
plus
max 5 0 V
1
2
3
4
P1
ES
P2
S
11
Rotary switch for selection of measurement functions and ON/OFF
START button for starting the selected measurement function
Liquid crystal display (LCD)
Connection “H” for auxiliary earth 4 mm ∅
 Connection “S” for probe 4 mm ∅
Connection for current test clips
Connection “ES” for earth electrode probe 4 mm ∅
Connection “E” for the earth electrode to be measured 4 mm ∅
Battery compartment for 6 alcaline batteries (type AA, LR6) or NiCd
batteries (bottom side of instrument)
 Technical data. Name-plate with serial number (bottom side of instrument)
11 Carrying belt loops (4x)

SETUP
- 6 -
3 SETUP
Please, read carefully the chapter ”safety regulations” before
powering up the instrument.
If you have problems see section ”Troubleshooting”.
Insertion of batteries
Switch off instrument
Disconnect all test leads
Open battery compartment
Insert batteries. Close battery compartment
Apply carrying belt as shown
12
3
+
5
4

RA2-pole, 3-pole measurements
- 7 -
4 RA2-pole, 3-pole measurements
For 2-pole measurements connect terminals H and S with the supplied
connector cable!
Select function RA3-pole
Display is as shown below.
Connect test leads
Hint: Colour coded front plate and terminals provide appropriate connection.
Connect terminal E/C1 to earth electrode with short test lead (1,5 m).
Place 2 ground stakes. Minimum distance between earth electrode (E/C1),
probe (S/P2), and auxiliary earth (H/C2) is 20m!
Connect stakes with 25m and 50m wires to H/C2 and S/P2 as shown.
Press START
The ”active” symbol indicates that measurement is in progress.
Continuous measurement as long as START is pressed.
Symbol ” ” indicates completed measurement. The result is kept on the
display until a new measurement is started or the main switch is turned.
>20 m
>20 m
34
2
S/P2 H/C2 E/C1
1
ES
H
ES
ESH
activ e
ES
H
ES
eas y
max 50 V

RA4-pole measurements
- 8 -
5 RA4-pole measurements
Select function RA4-pole
Display as shown below.
Connect test leads
Hint: Colour coded front plate and terminals provide appropriate connections.
Connect terminals E/C1 and ES/P1 to earth electrode with 2 short test
leads (1,5 m). Place 2 ground stakes. Minimum distance between earth
electrode (E/C1), probe (S/P2), and auxiliary earth (H/C2) is 20m! The ES
test lead eliminates the influence of the test leads.
Connect stakes with 25m and 50m wires to H/C2 and S/P2 as shown.
Press START
The ”active” symbol indicates that measurement is in progress. For
continuous measurement keep START pressed.
Symbol ” ” indicates completed measurement. The result is kept on
display until a new measurement is started or the rotary switch is turned.
ES
ESH
activ e
ESHES
ESHES
easy
max50 V
>20 m
>20 m
S/P2
P1
ES
P2
S
H/C2
ES/P1
E/C1
1
34
2

RA3-pole selective earth resistance measurement with current clamp
- 9 -
6 RA3-pole selective earth resistance
measurement with current clamp
Select function RA3-pole
Display as shown below.
 Connect test leads
Connect safety test lead (1.5 m) to terminal E/C1 and its other end to the
ground system to be measured. Place 2 ground stakes. Minimum distance
between earth electrode (E/C1), probe (S/P2) and auxiliary earth (H/C2)
is 20 m!
Connect stakes with 25m and 50m wires to H/C2 and S/P2 as shown.
Connect current clamp with adapter cable as shown.
Press START
The ”active” symbol indicates that measurement is in progress. For
continuous measurement keep START pressed.
 Symbol ” ” indicates completed measurement. The result is kept on
display until a new measurement is started or the rotary switch is turned.
34
ES
H
acti ve
ESH
plus
max50 V
P2
S
2
1
ESH

RA4-pole selective earth resistance measurement with current clamp
- 10 -
7 RA4-pole selective earth resistance
measurement with current clamp
Select function RA4-pole
Display as shown below.
 Connect test leads
Connect terminals E/C1 and ES/P1 with the safety test leads (1.5 m) to the
earth electrode to be measured. Place 2 ground stakes. Minimum distance
between earth electrode (E/C1), probe (S/P2) and auxiliary earth (H/C2)
is 20 m! The ES test lead eliminates the influence of the test leads.
Connect stakes with 25m and 50m wires to H/C2 and S/P2 as shown.
Connect current clamp with adapter cable as shown.
Press START
The ”active” symbol indicates that measurement is in progress. For
continuous measurement keep START pressed.
 Symbol ” ” indicates completed measurement. The result is kept on
display until a new measurement is started or the rotary switch is turned.
ESH
active
ES
H
plus
max50 V
P2
S
P1
ES
ES ES
ES
34
1
ESH
2

Stakeless ground loop measurement
- 11 -
8 Stakeless ground loop measurement


Select function
Display as shown below.
Connect test clips
Connect inducing clamp (see Recommended Accessories) to terminals H/C2
and E/C1 using the safety test leads (1.5m) as shown.
Hint: Use the recommended current clamp for incucing only. Other clamps are not
suited.
Connect the second current clamp using the adapter cable (sensing current
clamp).
The test current clamp must enclose the earth electrode, which will
subsequently be measured.
Hint: Minimum distance between the two current clamps is 10 cm.
Press START
The ”active” symbol indicates that measurement is in progress. For
continuous measurement keep START pressed.
 Symbol ” ” indicates completed measurement. The result is kept on
display until a new measurement is started or the rotary switch is turned.
EH
active
EH
EH
34
plus
max50 V
12

Troubleshooting
- 12 -
9 Troubleshooting
External voltage (Uext) too high
If the external voltage applied to the instrument is too high, no measurement
can be started (see “Technical data” for Uext limit).
Hint: Reposition probe (S/P2) and restart measurement.
Auxiliary earth electrode resistance (RH) too high
If the auxiliary earth electrode resistance is too high it is not possible to drive
the current necessary for reliable measurements. The measurement is
blocked (see “Technical data” for Rh limit).
Hint: Check connection of test lead with terminal H/C2, check auxiliary earth
stake.
Probe resistance (Rs) too high
If the probe resistance is too high measurements are not reliable. The
measurement is blocked (see “Technical data” for Rs limit).
Hint: Check connection of test lead with terminal S/P2, check probe stake.
Weak batteries
If the batteries are weak the supply voltage may break down during
measurement. If there is enough energy to complete the measurement ” ”
symbol is displayed - measuring results are valid. If not, a reset occurs.
Hint: Replace batteries. Use 6 alkaline AA-type (LR6) batteries.

Troubleshooting
- 13 -
Is your RAmeasurement result reliable?
Probe S/P2 must be outside the potential gradient areas of E/C1 and H/C2
for accurate measurements. Normally a probe distance of more than 20m is
sufficient. However in some environmental conditions (depending mainly on
the soil resistivity) this may not suffice. To be sure reposition the probes and
take several measurements. If the readings are approx. the same your
measuring results are reliable, if not increase the probe distance.
5
ea s y
max50V
>20 m
>20 m
S/P2 H/C2 E/C1
Us Ug
ESESH
>Limit
H
ES
ESH
>Limit
S
>Limit
UESH
ext
ESH
1
2
3
4
Is the result of a „Stakeless ground loop
measurement“ reliable?
Ensure that you are using the correct inducing clamp (see „Recommended
Accessories“)!
The clamp’s parameters are suited for this test method. Using an undefined
clamp will render incorrect results.
Ensure that the recommended minimum distance between the current clamp
is kept. If the clamps are positioned too close together, the magnetic field of
the inducing clamp will influence the sensing current clamp. To avoid mutual
influencing, the distance between the clamps can be varied. If the
measurement values vary only a little or not at all, the value can be regarded
as reliable.

Technical Data
- 14 -
10 Technical Data
Display: 1999 digit LCD-display with special symbols, digit height 25 mm,
fluorescent backlight
User interface: Instant measurement through TURN and START - one button concept .
The only operating elements are rotary switch and START button.
Robust & Instrument is designed for tough environmental conditions
waterproof: (rubber protective cover, IP56).
Temperature ranges:
Working temp.: -10° C ...+50° C (+14° F ...+122° F )
Operating temp.: 0° C ...+35° C (+32° F ... +95° F )
Storage temp.: -20° C ...+60° C ( -4° F ...+140° F )
Reference temp.: +23° C ±. 2° C (+73° F ±4° F )
Temp. coefficient: ±0,1 % of reading / K
Intrinsic error: Refers to the reference temperature range and is guaranteed for 3 years.
Operating error: Refers to the operating temperature range and is guaranteed for 3 years.
Climatic class: C1 (IEC 654-1), -5° C...+45°C, 5%...95% RH
Protective type: IP56 according to EN 60529
Safety: Protection by double and/or reinforced insulation.
max 50V to earth
EMC (Emission): IEC 61326-1:1997 Class B
CISPR16 (CISPR22), CISPR16-1
EMC (Immunity): IEC61326-1:1997
IEC 61000-4-2 8 kVair / 4 kV contact (B)
IEC 61000-4-3 3 V/m (A)
IEC 61000-4-4 2 kV (B)
IEC 61000-4-5 2 kV (B)
IEC 61000-4-6 3V (A)
IEC 61000-4-8 30 A/m (A)
Quality system: developed, designed and manufactured according to DIN ISO 9001
External voltage: Uext,max = 24 V (DC, AC < 400Hz), measurement inhibited for higher
values
Uext rejection: >120dB (162/3, 50, 60, 400Hz)
Measuring time: typical 6 sec
Max. overload: 250 Vrms
Auxiliary power: 6 x 1,5 V mignon cells alkali-manganese (type AA LR6)
Battery life span: typical > 3000 measurements
Dimensions: 240 x 180 x 110 mm
Weight: 1,1 kg (including batteries)

Technical Data
- 15 -
RA3-pole ground resistance measurement (IEC 1557-5)
Switch position Resolution measuring range Intrinsic error Operating error
Ra 3-pole 0,001 … 10 Ω0,001 Ω... 19,99 kΩ±(2% rdg + 3 d) ±(5% rdg + 3 d)
For 2-pole measurements connect terminals H and S with the supplied connector cable!
Measuring principle: Current and voltage measurement
Measuring voltage: Um = 48 Vac.
Short-circuit current: > 50 mA
Meas. frequency: 128 Hz (125 Hz on request)
Probe resistance (Rs): max 100 kΩ
Auxiliary earth electrode resistance (Rh): max. 100 kΩ
Additional error from Rh and Rs: Rh[kΩ] Rs[kΩ] / Ra[Ω] 0,2 %
Monitoring of Rs and Rh with error indicator.
Automatic range selection.
RA4-pole ground resistance measurement (IEC 1557-5)
Switch position Resolution measuring range Intrinsic error Operating error
Ra 4-pole 0,001 … 10 Ω0,001 Ω... 19,99 kΩ±(2% rdg + 3 d) ±(5% rdg + 3 d)
Measuring principle: Current/voltage measurement
Measuring voltage: Um = 48 Vac.
Short-circuit current: > 50 mA
Measuring frequency: 128 Hz (125 Hz on request)
Probe resistance (Rs+ Res): max. 100 kΩ
Auxiliary earth electrode resistance (Rh): max. 100 kΩ
Additional error from Rh and Rs: Rh[kΩ] Rs[kΩ] / Ra[Ω] 0,2 %
Monitoring of Rs, and Rh with error indicator.
Automatic range selection.
RA3-pole selective ground resistance measurement with current clamp (RA )
Switch
position
Resolution Measuring range Intrinsic error Operating error
Ra 3-pole
0.001 ... 10 Ω0.001 Ω.. 19.99 kΩ±(7% rdg + 3 d) ±(10% rdg + 5 d)
Measuring principle: Current/voltage measurement (with external current clamp)
Measuring voltage: Um = 48 VAC.
Short-circuit current: > 50 mA
Measuring frequency: 128 Hz (125 Hz on request)
Probe resistance (Rs): max. 100 kΩ
Auxiliary earth electrode resistance (Rh): max. 100 kΩ
Monitoring of Rs, and Rh with error indicator.
Measurement is not executed if the current through the current clamp is too low.
Automatic range selection.

Technical Data
- 16 -
RA4- pole selective ground resistance measurement with current clamp (RA )
Switch
position
Resolution Measuring range Intrinsic error Operating error
Ra 4-pole
0.001 ... 10 Ω0.001 Ω.. 19.99 kΩ±(7% rdg + 3 d) ±(10% rdg + 5 d)
Measuring principle: Current/voltage measurement (with external current clamp)
Measuring voltage: Um = 48 VAC.
Short-circuit current: > 50 mA
Measuring frequency: 128 Hz (125 Hz on request)
Probe resistance (Rs): max. 100 kΩ
Auxiliary earth electrode resistance (Rh): max. 100 kΩ
Monitoring of Rs, and Rh with error indicator.
Measurement is not executed if the current through the current clamp is too low.
Automatic range selection.
Stakeless ground loop measurement ( )
Switch
position
Resolution Measuring range Intrinsic error Operating error
Ra 4-pole
0.001 ... 0.1 Ω0.001 Ω.. 199.9 Ω±(7% rdg + 3 d) ±(10% rdg + 5 d)
Measuring principle: Stakeless measurement of resistance in closed loops using two
current transformers
Measuring voltage: Um = 48 VAC (primary)
Measuring frequency: 128 Hz (125 Hz on request)
Noise current (Iext): max. Iext = 10 A (AC) (Ra < 20 Ω)
max. Iext = 2 A (AC) (Ra >20 Ω)
Automatic range selection.
The information regarding stakeless ground loop measurements is only valid when
used in conjunction with the recommended current clamps at the minimum distance
specified.

Maintenance, Service, Warranty
- 17 -
11 Maintenance, Service, Warranty
If the instrument is operated and handled properly it does not need specific
maintenance and service. Maintenance work must only be undertaken by trained
and qualified staff and during the warranty period only by authorised service
centres.
Calibration
As an additional service we offer a regular check up and calibration of your
instrument. Upon request and for a fee we supply company test certificates or test
certificates of the public calibration service.
Storage
In case the instrument is either not used or stored for a longer period, remove
batteries and keep them separately beforehand to avoid possible damage by
leaking battery electrolyte.

Maintenance, Service, Warranty
- 18 -
Service
Dear customer,
This instrument has been manufactured and tested according to the latest
technological innovations and in compliance with the
quality assurance system DIN ISO 9001.
If there should still be reason for complaint please refer to your nearest service
centre, giving a detailed description of the defect by using the enclosed service
card and including a copy of the invoice or the delivery note. If the instrument is
operated as agreed we guarantee fault free function and calibration of the
instrument for a period of TWO (2) years after the date of the first end-user
purchase.
This warranty does not apply to any damage caused by improper treatment or
operation or by impermissible overload.
Packing
Use for shipping the original packing only. The manufacturer doesn't accept any
granting security for damage that might have been formed by an inappropriate
packing.
Warranty
Years WARRANTY
2 years warranty for the indicated accuracy of the device.
2 years entitlement to repairs free of charge in case of malfunction if instrument
was used properly.
Note: For reasons of clarity this manual does not contain every detailed
information about all models of this product and therefore cannot
comprise every imaginable way of use, operation or maintenance
2

Other products
- 19 -
12 Other products
The LEM group offers a wide range of other products for testing the efficiency of
protective measures:
Earth testers: HANDY GEO, SATURN GEO
easy
easyeasy
easy , SATURN GEO plus
plusplus
plus
SATURN GEO (X), HEME GEO 15
Insulation testers: HANDY ISO, SATURN ISO, UNILAP ISO X,
UNILAP ISO 5kV, HEME ISO 1000/2000
Installation testers: SATURN 100, UNILAP 100 (X)E
• Multimeters, instrument testers
• Non-invasive transformers for analysing voltage, current and power
• Power quality analysers and power measurement instruments.
Also available: Appropriate accessories, interfaces (RS232, IrDAâ), data memory,
PC-software for protocol generation,….
LEM provides complete measurement solutions – please, contact our sales
partners world-wide for additional information.
LEM reserves the right to modify
specifications without notice for the purpose
of product improvement.