Beha-Amprobe PROINSTALL-75-UK User manual

Multifunction Installation Tester
ProInstall-75
User Manual

Multifunction Installation
Tester
ProInstall-75
User Manual
5/2019, Rev C
©2019 Beha-Amprobe.
All rights reserved.
English

Limited Warranty and Limitation of Liability
Your Beha-Amprobe product will be free from defects in material and workmanship for
three years from the date of purchase unless local laws require otherwise. This warranty does
not cover fuses, disposable batteries or damage from accident, neglect, misuse, alteration,
contamination, or abnormal conditions of operation or handling. Resellers are not authorized
to extend any other warranty on the behalf of Beha-Amprobe. To obtain service during the
warranty period, return the product with proof of purchase to an authorized Beha-Amprobe
Service Center or to an Beha-Amprobe dealer or distributor. See Repair Section for details.
THIS WARRANTY IS YOUR ONLY REMEDY. ALL OTHER WARRANTIES - WHETHER EXPRESS,
IMPLIED OR STATUTORY - INCLUDING IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
PURPOSE OR MERCHANTABILITY, ARE HEREBY DISCLAIMED. MANUFACTURER SHALL NOT BE
LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES,
ARISING FROM ANY CAUSE OR THEORY. Since some states or countries do not allow the
exclusion or limitation of an implied warranty or of incidental or consequential damages, this
limitation of liability may not apply to you.
Repair
All Beha-Amprobe tools returned for warranty or non-warranty repair or for calibration
should be accompanied by the following: your name, company’s name, address, telephone
number, and proof of purchase. Additionally, please include a brief description of the
problem or the service requested and include the test leads with the meter. Non-warranty
repair or replacement charges should be remitted in the form of a check, a money order,
credit card with expiration date, or a purchase order made payable to Beha-Amprobe.
In-warranty Repairs and Replacement – All Countries
Please read the warranty statement and check your battery before requesting repair.
During the warranty period, any defective test tool can be returned to your Beha-Amprobe
distributor for an exchange for the same or like product. Please check the “Where to Buy”
section on beha-amprobe.com for a list of distributors near you.
Non-warranty Repairs and Replacement – Europe
European non-warranty units can be replaced by your Beha-Amprobe distributor for a
nominal charge. Please check the “Where to Buy” section on beha-amprobe.com for a list of
distributors near you.
Beha-Amprobe Germany Beha-Amprobe United Kingdom
In den Engematten 14 52 Hurricane Way
79286 Glottertal Norwich
[phone] - 0 Norfolk, NR6 6JB
beha-amprobe.de [phone]
beha-amprobe.com
Beha-Amprobe Headquarters
Science Park
Eindhoven 5110
5692 EC Son, The Netherlands
[phone]
beha-amprobe.com

1
ProInstall-75
CONTENTS
INTRODUCTION ...........................................................................................................3
SYMBOLS.....................................................................................................................3
SAFETY INFORMATION ...............................................................................................4
UNPACKING THE TESTER ............................................................................................5
OPERATING THE TESTER .............................................................................................5
Using the Rotary Switch........................................................................................................ 5
Understanding the Pushbuttons........................................................................................... 5
Understanding the Display ................................................................................................... 7
Input Terminals ...................................................................................................................... 9
Error Codes............................................................................................................................. 9
Power-On Options ................................................................................................................. 10
MAKING MEASUREMENTS .........................................................................................11
Measuring Volts and Frequency ........................................................................................... 11
Measuring Insulation Resistance .......................................................................................... 11
Measuring Continuity ........................................................................................................... 12
Measuring Loop/Line Impedance ......................................................................................... 13
Loop impedance (line to protective earth L-PE) ........................................................... 13
Earth resistance testing by loop method ....................................................................... 14
Line impedance ............................................................................................................... 15
Measuring RCD Tripping Time .............................................................................................. 16
Measuring RCD Tripping Current ......................................................................................... 19
RCD Testing in IT Systems...................................................................................................... 20
Testing Phase Sequence ........................................................................................................ 20
MAINTAINING THE TESTER .........................................................................................21
Cleaning ................................................................................................................................. 21
Testing and Replacing the Batteries..................................................................................... 21
Testing the Fuse ..................................................................................................................... 23
DETAILED SPECIFICATIONS .........................................................................................23
Features.................................................................................................................................. 23
General Specifications........................................................................................................... 24

2
ELECTRICAL MEASUREMENT SPECIFICATIONS ..........................................................25
Insulation Resistance (RISO)................................................................................................... 25
Continuity (RLO)..................................................................................................................... 26
Loop Tests (ZI)........................................................................................................................ 26
RCD/FI Tests (PT, IPN) ........................................................................................................... 27
AC Voltage Measurement (V) ............................................................................................... 28
Continuity Testing (RLO)........................................................................................................ 28
Insulation Resistance Measurement (RISO)........................................................................... 28
Loop/Line Impedance: No Trip and Hi Current Modes ........................................................ 29
Prospective Short Circuit Current Test (PSC/IK)
Prospective Earth Fault Current (PEFC) ................................................................................ 29
RCD TESTING ...............................................................................................................30
RCD Types Tested ................................................................................................................... 30
Test Signals............................................................................................................................. 30
RCD Types Tested (PT) .......................................................................................................... 30
Maximum Trip Time............................................................................................................... 31
RCD/FI-Tripping Current Measurement/Ramp Test (IPN ) .................................................. 31
Phase Sequence Indication.................................................................................................... 31
MAINS WIRING TEST...................................................................................................32
OPERATING RANGES AND UNCERTAINTIES PER EN 61557 .......................................32

3
INTRODUCTION
The Beha-Amprobe Model ProInstall-75 is a battery powered multifunction installation tester.
This tester is designed to measure and test the following:
• Voltage and Frequency
• Insulation Resistance (EN61557-2)
• Continuity (EN61557-4)
• Loop/Line Resistance (EN61557-3)
• Residual Current Devices (RCD) Tripping Time (EN61557-6)
• RCD Tripping Current (EN61557-6)
• Phase Sequence (EN61557-7)
SYMBOLS
Caution! Risk of electric shock.
WCaution! Refer to the explanation in this manual.
Consult user documentation.
TDouble insulated (Class II) equipment
JEarth (Ground).
IFuse.
MBattery.
PConforms to requirements of European Union and European Free Trade
Association.
Conforms to relevant Australian standards.
Do not use in distribution systems with voltages higher than 550 V.
CAT III /
CAT IV
CAT III Testers are designed to protect against transients in fixed equipment
installations at the distribution level; CAT IV Testers are designed to protect
against transients from the primary supply level (overhead or underground
utility service).
=
This product complies with the WEEE Directive marking requirements. The
affixed label indicates that you must not discard this electrical/electronic
product in domestic household waste. Product Category: With reference to
the equipment types in the WEEE Directive Annex I, this product is classed as
category 9 “Monitoring and Control Instrumentation” product. Do not dispose of
this product as unsorted municipal waste.

4
SAFETY INFORMATION
A Warning identifies hazardous conditions and actions that could cause bodily harm or death.
A Caution identifies conditions and actions that could damage the installation tester or
cause permanent loss of data.
WWarnings: Read Before Using
To prevent possible electrical shock, fire, or personal injury:
• Use the product only as specified, or the protection supplied by the product can be
compromised.
• Do not use the product around explosive gas, vapor or in damp or wet environments.
• Do not use test leads if they are damaged. Examine the test leads for damaged
insulation, exposed metal, or if the wear indicator shows. Check test lead continuity.
• Use only probes, test leads, and adapters supplied with the product.
• Measure a known voltage first to make sure that the product operates correctly.
• The battery door must be closed and locked before you operate the Product.
• Examine the case before you use the Product. Look for cracks or missing plastic.
Carefully look at the insulation around the terminals.
• Be sure that the battery polarity is correct to prevent battery leakage.
• Repair the Product before use if the battery leaks.
• Do not operate the Product with covers removed or the case open. Hazardous voltage
exposure is possible.
• Do not apply more than the rated voltage between the terminals or between each
terminal and earth ground.
• Do not use the product if it is damaged.
• Have an approved technician repair the product.
• Do not apply more than the rated voltage between the terminals or between each
terminal and earth ground.
• Remove all probes, test leads, and accessories before opening the battery door and the
product case.
• Do not operate the product with covers removed or the case open. Hazardous voltage
exposure is possible.
• Use caution when working with voltages above 30 V ac rms, 42 V ac peak, or 60 V dc.
• Use only specified replacement fuses.
• Use the correct terminals, function, and range for measurements.
• Keep fingers behind the finger guards on the probes.
• Connect the common test lead before the live test lead and remove the live test lead
before the common test lead.
• Replace the batteries when the low battery indicator shows to prevent incorrect
measurements.
• Use only specified replacement parts.
• Do not use the tester in distribution systems with voltages higher than 550 V.
• Comply with local and national safety codes. Use personal protective equipment
(approved rubber gloves, face protection, and flame-resistant clothes) to prevent shock
and arc blast injury where hazardous live conductors are exposed.

5
UNPACKING AND INSPECTION
Your shipping carton should include:
• ProInstall-75
• Test lead set
• ProInstall-TL-UK (LC38 AMP-MFT, mains test cord)
• Alligator clips
• Test probe
• ProInstall-TL-KIT (Remote test probe and probe tips)
• ProInstall-CC (Soft case with carrying strap)
• TL-75 (Fused test probe, red/blue/green with lantern spring, cap and tip cover)
• Zero-Adapter
• Statement of calibration
• Batteries
• Quick reference guide
• Carry strap for neck/waist
• CD-ROM (User manual)
If any of the items are damaged or missing, return the complete package to the place of
purchase for an exchange.
OPERATING THE TESTER
Using the Rotary Switch
Use the rotary switch to select the type of test you want to perform.
Understanding the Pushbuttons
Use the pushbuttons to control operation of the tester, select test results for viewing, and
scroll through selected test results.
19
12
11
7
8
9
10
2
1
5 6 18
3413 14
15
16
17

6
Number Measurement Function
1
Starts the selected test. The TEST key is surrounded by a “touch pad”. The touch
pad measures the potential between the operator and the tester’s PE terminal.
If you exceed a 100 V threshold, the
Wsymbol above the touch pad is illuminated.
2Set RCD variable trip current.
3Illuminates when > 100 V is detected on the touch pad.
4Zero the test lead resistance offset.
5Turns the backlight on and off.
6Turns the tester on and off. The tester will also shut off automatically if there is
no activity for 10 minutes.
7
• Loop input select (L-N, L-PE).
• Voltage input select (L-N, L-PE, N-PE).
• Insulation test: (L-N, L-PE, N-PE)
• RCD current rating (10, 30, 100, 300, 500, 1000 mA or VAR).
8RCD Current multiplier (x1/2, x1, x5, AUTO).
9
• Select RCD: Type AC (sinusoidal), Type AC Selective, Type A (half-wave), Type A
Selective.
• Battery test.
• Loop No Trip RE/ IK
10 • RCD test polarity (0, 180 degrees).
• Insulation test voltage (250, 500, or 1000 V).
11 Volts.
12 Insulation resistance.
13 Continuity.
14 Loop impedance — No trip mode.
15 Loop impedance — Hi current trip mode.
16 RCD tripping time.
17 RCD tripping level.
18 Phase rotation.
19 Rotary switch.

7
Understanding the Display
22 24
25
23
21
20
26
27
33
35
34
30 29
28
32
31
Number Description
20
Configuration options. Settings you can make within the measurement
functions. For example, in the RCD Tripping Time function (PT) you can press
F2 to multiply the test current by x1/2, x1, x5 and you can press F3 to select the
type of RCD you are testing.
21 Arrows above or below the terminal indicator symbol indicate reversed polarity.
Check the connection or check the wiring to correct.
22
Terminal indicator symbol. A terminal indicator symbol with a dot in the
center indicates the terminal is used for the selected function. The terminals
are:
• L (Line)
• PE (Protective Earth)
• N (Neutral)
23
Indicates the selected rotary switch setting. The measurement value in the
primary display also corresponds to the switch setting. Rotary switch settings are:
VVolts Insulation
Continuity RCD trip time
Loop no trip RCD trip current
Loop hi current trip Phase Rotation
24
Indicates that the measured trip current (trip current test) or the measured trip
time (trip time test) is according to the appropriate RCD standard and the fault
voltage is below the selected limit. For more information, see Maximum Trip
Time Table in the Specifications section of this manual.

8
25
Indicates the preset fault voltage limit. The default setting is 50 V. Some
locations require the fault voltage be set to 25 V, as specified by local electrical
codes. Press F4 when you turn on the tester to toggle the fault voltage
between 25 V and 50 V. The value you set will appear on the display and will be
saved when you turn the tester off.
26 Primary display and measurement units.
27 Low battery icon. See “Testing and Replacing the Batteries” section for
additional information on batteries and power management.
28 Appears when you press the Test button. Disappears when the test is completed.
29 Appears when the instrument is overheated. The Loop test and RCD functions
are inhibited when the instrument is overheated.
30 Appears when an error occurs. Testing is disabled. See “Error Codes” on page 9
for a listing and explanation of possible error codes.
31
Name of the secondary measurement function.
UN
Test voltage for insulation test.
UF
Fault voltage. Measures neutral to earth.
PSC
Prospective Short Circuit. Calculated from measured voltage and impedance
when reading line to neutral.
PEFC
Prospective Earth Fault Current. Calculated from voltage and loop impedance
which is measured line to protective earth.
IK
In combination with the PSC or PEFC symbol, indicates a short circuit current.
RE
Earth resistance.
32
Secondary display and measurement units. Some tests will return more than
one result or return a computed value based on the test result. This will occur
with:
• Volts
Secondary display shows line frequency.
• Insulation tests
Secondary display shows actual test voltage.
• Loop/line impedance
Secondary display shows PEFC (Prospective Earth Fault Current) or REPSC
(Prospective Short Circuit Current).
• RCD switching time
Secondary display shows UFfault voltage.
• RCD tripping current
Secondary display shows UFfault voltage.
33 Appears only in Volts. For more information see “Testing and Replacing the
Batteries” Section.
34
Appears when you press the button to zero the leads. After the zeroing
operation, the icon stays illuminated indicating that zeroing has been
performed. Only used when performing continuity or loop testing.
35 Potential danger. Appears when measuring or sourcing high voltages.

9
Input Terminals
Use the rotary switch to select the type of test you want to perform.
36
37
38
Number Description
36 L (Line)
37 PE (Protective Earth)
38 N (Neutral)
Error Codes
Various error conditions are detected by the tester and are indicated with the Wicon,
“Err”, and an error number on the primary display. See table below. These error conditions
disable testing and, if necessary, stop a running test.
Figure 1. Error Display
Error Condition Code Solution
Self-test Fails 1 Return the tester to your distributor or Beha-Amprobe.
Over-temp 2 Wait while the tester cools down.
Fault Voltage 4 Check the installation, in particular, the voltage
between N and PE.
Excessive Noise 5 Switch off all appliances (Loop, RCD measurements)

10
Power-On Options
To select a power-on option, press and the function key simultaneously and then release
the button. Power-on options are retained when the tester is turned OFF. See Table below.
UK - Mode Selected Automatic Lead
Swapping Mode Selected
Figure 2. Lead Swapping Modes
Keys Power-on Options
Loop/Line Impedance IKlimit. Toggles the IKlimit between 10 kA and 50 kA.
The default is 10 kA.

Line and Neutral Swap mode. Two modes of operation are available. You
can configure the tester to operate in L-n mode or L-n n-L mode,
• In L-n mode, the L and N phase conductors must NEVER be reversed.
This is a requirement in some regions including the UK. The icon
appears on the display indicating that the system L and N conductors are
swapped and testing is inhibited. Investigate and rectify the cause of this
system fault before proceeding. L-n mode also changes the RCD x1/2 trip
time duration to 2 seconds as required in the UK.
• In L-n n-L mode, the unit allows the L and N phase conductors to be
swapped and testing will continue.
Note: In locations where polarized plugs and outlets are used, a swapped
lead icon ( ) may indicate that the outlet was wired incorrectly.
Correct this problem before proceeding with any testing.
Fault voltage limit. Toggles the fault voltage between 25 V and 50 V. The
default is 50 V.
Continuity beeper toggle. Toggles the continuity beeper on and off. The
default is on.

11
MAKING MEASUREMENTS
Measuring Volts and Frequency
Figure 3. Volts Display/Switch and Terminal Settings
To measure voltage and frequency:
1. Turn the rotary switch to the V position.
2. Use two (red and blue) terminals for this test. You can use test leads or mains cord when
measuring AC voltage.
• The primary (upper) display shows the AC voltage. The tester reads AC voltage to 500 V.
Press F1 to toggle the voltage reading between L-PE, L-N, and N-PE.
• The secondary (lower) display shows mains frequency.
WWarning
It is not possible to check reliably the connections of N- and PE-circuits in the socket by voltage
measurement. To ensure this, we suggest to verify this while performing Loop and Line
impedance measuring.
Reason for this is that the voltages L-N, L-PE and N-PE are measured by the tester at the same
time and will be influenced by open wires together with resistances (loads) and capacitances
of the installation network in combination with internal resistances of the tester itself.
This issue happens especially when N is missing/open and can lead to wrong reading.
Measuring Insulation Resistance
Figure 4. Insulation Resistance Display/Switch and Terminal Settings
WWarning
To avoid electric shock, measurements should only be performed on de-energized circuits.
To measure insulation resistance:
1. Turn the rotary switch to the RISO position.
2. Use the L and PE (red and green) terminals for this test.
3. Use the F4 to select the test voltage. Most insulation testing is performed at 500 V, but
observe local test requirements.

12
4. Press and hold until the reading settles.
Note: Testing is inhibited if voltage is detected in the line.
• The primary (upper) display shows the insulation resistance.
• The secondary (lower) display shows the actual test voltage.
Note: For normal insulation with high resistance, the actual test voltage (UN) should
always be equal to or higher than the programmed voltage. If insulation resistance is
bad, the test voltage is automatically reduced to limit the test current to safe ranges.
Measuring Continuity
Figure 5. Continuity Zero Display/Switch and Terminal Settings
A continuity test is used to verify the integrity of connections by making a high resolution
resistance measurement. This is especially important for checking Protective Earth
connections.
Note: In countries where electrical circuits are laid out in a ring, it is recommended that you
make an end-to-end check of the ring at the electrical panel.
WWarning
• Measurements should only be performed on de-energized circuits.
• Measurements may be adversely affected by impedances or parallel circuits or transient
currents.
To measure continuity:
1. Turn the rotary switch to the RLO position.
2. Use the L and PE (red and green) terminals for this test.
3. Before making a continuity test, use the Zero adapter to zero the test leads. Press and
hold until the ZERO annunciator appears. The tester measures probe resistance,
stores the reading in memory, and subtracts it from readings. The resistance value is
saved even when power is turned off so you don’t need to repeat the operation every
time you use the instrument.
Note: Be sure the batteries are in good charge condition before you compensate the
test leads.
4. Press and hold until the reading settles. If the continuity beeper is enabled, the
tester beeps continuously for measured values less than 2 Ωand there is no stable
reading beep for measured values 2 ohms or greater. If a circuit is live, the test is
inhibited and the AC voltage appears in the secondary (lower) display.

13
Measuring Loop/Line Impedance
Figure 6. Loop/Line Impedance/Switch and Terminal Settings
Loop Impedance (Line to Protective Earth L-PE)
Loop impedance is source impedance measured between Line (L) and Protective Earth (PE).
You can also ascertain the Prospective Earth Fault Current (PEFC) that is the current that could
potentially flow if the phase conductor is shorted to the protective earth conductor. The tester
calculates the PEFC by dividing the measured mains voltage by the loop impedance. The loop
impedance function applies a test current that flows to earth. If RCDs are present in the circuit,
they may trip. To avoid tripping, always use the Zl No Trip function on the rotary switch. The
no trip test applies a special test that prevents RCDs in the system from tripping. If you are
certain no RCDs are in the circuit, you can use the Zl Hi Current function for a faster test.
Note: If the L and N terminals are reversed, the tester will auto-swap them internally and
continue testing. If the tester is configured for UK operation, testing will halt. This condition
is indicated by arrows above or below the terminal indicator symbol ( ).
Tip: We recommend to measure in addition to each loop impedance measurement also the
line impedance to ensure correct wiring.
This will proof the correct connection of live (L) and neutral (N) wire for short circuit and
overload protection.
To measure loop impedance no trip mode:
WWarning
To prevent tripping RCDs in the circuit:
• Always use the position for loop measurements.
• Preload conditions can cause the RCD to trip.
• An RCD with a nominal fault current of 10 mA will trip.
Note: To do a Loop impedance test in a circuit with a 10 mA RCD, we recommend a trip time
RCD test. Use a nominal test current of 10 mA and the factor x ½ for this test.
If the fault voltage is below 25 V or 50 V, dependent on the local requirement, the loop is
good. To calculate the loop impedance, divide the fault voltage by 10 mA (Loop impedance
= fault voltage x 100).
1. Turn the rotary switch to the position.
2. Connect all three leads to the L, PE, and N (red, green, and blue) terminals of the tester.
3. Press F1 to select L-PE. The display shows the ZIand indicator.
4. Before you do a loop impedance test, use the zero adapter to zero the test leads or the
mains cord. Press and hold for more than two seconds until the ZERO annunciator
appears. The tester measures the lead resistance, stores the reading in memory, and
subtracts it from readings. The resistance value is saved even when the power is turned

14
off so it is unnecessary to repeat the operation each time you use the tester with the
same test leads or mains cord.
Note: Be sure the batteries are in good charge condition before you zero the test leads.
5. Connect all three leads to the L, PE, and N of the system under test or plug the mains
cord into the socket under test.
Figure 7. Display After Zeroing
6. Press and release . Wait for the test to complete. The primary (upper) display shows
the loop impedance.
7. To read the Prospective Earth Fault Current, press the key and select lK. The
Prospective Earth Fault Current appears in amps or kilo amps in the secondary (lower)
display.
8. If the mains is too noisy, Err 5 will be displayed. (The measured value accuracy is
degraded by the noise.) Press the down arrow to display the measured value. Press the
up arrow to return to the Err 5 display.
This test will take several seconds to complete. If the mains is disconnected while the test is
active, the test automatically terminates.
Note: Errors may occur due to preloading the circuit under test.
To measure loop impedance—Hi current trip mode:
If no RCDs are present in the system under test, you can use the high current Line Earth (L-
PE) loop impedance test.
1. Turn the rotary switch to the position.
2. Connect all three leads to the L, PE, and N (red, green, and blue) terminals of the tester.
3. Press F1 to select L-PE. The appears to indicate that hi current trip mode is
selected.
4. Repeat Steps 4 through 8 from the preceding test.
WWarning
The symbol on the LCD indicates the high current loop mode - any RCDs in the system
will trip - ensure there are no RCDs present.
Earth Resistance Testing by Loop Method
You can also use the tester to measure the earth resistance component of the total loop
resistance. Check your local regulations to determine if this method is acceptable in your
area. You can use three leads or the mains cord to perform this test. Use the connection
shown in Figure 8 when making a 3-wire connection for earth resistance loop test. Zero the
test leads (see sequence for Loop Impedance measurement).

15
L
N
PE
PE (Green)
L (Red)
N (Blue)
Figure 8. 3-Wire Connection for Earth Resistance Loop Test
To measure earth resistance using the loop test no trip mode:
1. Turn the rotary switch to the position
2. Press to select L-PE.
3. Press to select RE (resistance).
4. Press and release . Wait for the test to complete.
• The primary (upper) display shows the loop impedance.
• The secondary (lower) display shows the earth resistance.
Line Impedance
Line impedance is source impedance measured between Line conductors or Line and
Neutral. This function allows the following tests:
• Line to Neutral loop impedance.
Tip: We recomend to measure in additon to each loop impedance measurement also
the line impedance to ensure correct wiring.
This will proof the correct connection of live (L) and neutral (N) wire for short circuit
and overload protection.
• Line to Line impedance in 3-phase systems.
• Two wire L-PE loop measurement when Neutral is not available. This is a way of making
a high current, 2-wire loop measurement. Therefore connect Line to L input and PE to N
input. It cannot be used on circuits protected by RCDs because it will cause them to trip.
• Prospective Short Circuit Current (PSC). PSC is the current that can potentially flow if the
phase conductor is shorted to the neutral conductor or another phase conductor. The tester
calculates the PSC current by dividing the measured mains voltage by the line impedance.
Figure 9. Line Impedance Display

16
To measure line impedance:
1. Turn the rotary switch to the position. The LCD indicates that the high current
loop mode is selected by displaying the symbol.
2. Connect the red lead to the L (red) and the blue lead to the N (blue) terminals of the tester.
3. Press F1 to select L-N.
4. Use the zero adapter to zero the test leads or the mains cord.
5. Press and hold for more than two seconds until the ZERO annunciator appears. The
tester measures the lead resistance, stores the reading in memory, and subtracts it from
readings. The resistance value is saved even when the power is turned off so it is unnecessary
to repeat the operation each time you use the tester with the same test leads or mains cord.
Note: Be sure the batteries are in good charge condition before you zero the test leads.
WWarning
At this step, be careful not to select L-PE because a high current loop test will take place.
Any RCDs in the system will trip if you proceed.
Note: Connect the leads in a single-phase test to the system line and neutral. To measure
line-to-line impedance in a 3-phase system, connect the leads to 2 phases.
7. Press and release . Wait for the test to complete.
• The primary (upper) display shows the line impedance.
• The secondary (lower) display shows the Prospective Short Circuit Current (PSC).
8. If the mains is too noisy, Err 5 will be displayed. (The measured value accuracy is
degraded by the noise). Press the down arrow to display the measured value. Press the
up arrow to return to the Err 5 display.
Use the connection shown in Figure 10 when measuring in a 3-phase 500 V system.
L1
L2
L3
L (L1/Red)
N (L3/Blue)
Figure 10. Measuring in a 3-Phase System
Measuring RCD Tripping Time
Figure 11. RCD Tripping Time Display/Switch and Terminal Settings