RS PRO IPT 1800 User manual

Instruction Manual
IPT 1800
Digital LOOP / PSC Tester
FREN IT DE ES
P - N
P - E

TABLE OF CONTENTS
TITLE PAGE
I. WARNING ................................................................1
II. FEATURES...............................................................2
III. INSTRUMENT LAYOUT...........................................3
IV. SPECIFICATIONS....................................................4
4-1 Voltage Measurement............................................6
4-2 Manual and Autotest..............................................6
4-3 Automatic Overheat Cut-Out.................................6
V. OPERATING INSTRUCTIONS.................................7
5-1 Correct Wiring........................................................7
5-2 Measurement of the Loop Impedance ..................7
5-3 External Earth Probe.............................................8
5-4 Measurement of Prospective Short Circuit Current.....9

EN-1
I. WARNING
This instrument must only be used by a competent,
trained person and operated in strict accordance with
the instructions. We will not accept liability for any
damage or injury caused by misuse or non-compliance
with the instruction or safety procedures.
It is essential to read and understand the safety rules
contained in the instructions. They must always be
observed when using the instrument.
This instrument is only intended for single phase
operation, 230V
±
10% AC phase to earth or phase to
neutral operation. It must never be connected phase to
phase-damage will result.
When conducting a test, particularly on earth spikes, do
not touch any exposed metal work. This is because the
earth has a current flowing through it for the duration of
the test (approx. 20ms).
Never open the instrument case - there are dangerous
voltages present.
This instrument is primarily protected by HRC Ceramic
fuses. DO NOT ATTEMPT to replace them if they fail.
Should they fail please consult qualified service
personnel.
If the overheat symbol appears in the display ( )
disconnect the instrument from the mains and allow to
cool down.
This unit is designed to give minimum “splash” when
connecting to an earth point using the external earth
probe. To reduce this effect further, always connect the
probe in a firm and positive manner.

EN-2
II. FEATURES
Custom microprocessor controlled for highest accuracy
and reliability.
3 neons for checking correct wiring status.
Direct reading of Prospective Shout Circuit Current (PSC).
Large custom digital display readout on all models.
Measures low loop impedance (resolution of 0.01 Ohm).
High impedance ranges permit direct measurements of
ground spikes.
Automatic lock-out if test resistor overheats.
Safe voltage measurement function.
Audible confirmation on completion of a test.
Visual indication of reversed phase and neutral wiring at
socket.
Minimum “splash” when connecting to an external earth
point.
Resilient case made from modern plastics to take
everyday knocks and bangs.

EN-3
III. INSTRUMENT LAYOUT
P - N
P - E
AC CORD
FI
K
EUR
EATERNAL EARTH PROBE
LCD DISPLAY

EN-4
IV. SPECIFICATIONS
Rated Voltage : 230V
±
10% 50Hz.
Operating Temperature : 0
℃
~ 40
℃
Storage Temperature : -5
℃
~ 60
℃
Operating Humidity : 85% Maximum.
Storage Humidity : 85% Maximum.
Accuracy of Mains
Voltage Display :
±(
2% + 2digit).
Accuracy (Loop Impedance) :
±(
2%
±
3digit)
Fuse Protection : 240V/13A, 6kA HRC ceramic fuses.
General Dimensions : 180(L) x 130(W) x 70(H)mm.
Weight : Approx.800g include battery.
Test Current : 25A approx. (20Ohm).
Display : Large style 3 1/2 digit custom
LCD.
AC Test Period : 2 half cycles of AC (20ms).
Display Hold on Mains Loss : Approx. 1 second.
Over Range Indication : “OL” in display.
Over Temperature
Indication : “ ” in display.
Accessories : Test Lead with IEC Connector
(AC cord), External Earth Probe,
Neck Strap, Instruction Manual.

EN-5
Environmental Conditions
The product is designed for indoor use and up to a
maximum altitude of 2000m.
Installation Category : 300V CAT Ⅲ(single phase
230V)
Pollution Degree 2
This manual and product may use the following symbols
adopted from International Safety Standards.
Equipment protected throughout by DOUBLE
INSULATION or REINFORCED INSULATION.
Caution, risk of electric shock.
Caution (refer to accompanying documents)
Comply with IEC 1010-1

EN-6
4-1 Voltage Measurement
When the Loop and PSC Testers are first powered up by
connecting them to the mains, they automatically display
the mains voltage. The voltage display is updated
automatically every 0.5s. When the test button is
depressed (see section 5.1 first) the voltage mode is
cancelled. To recall the voltage measurement mode,
the power to the instrument must be removed and then
restored again.
4-2 Manual and Autotest
Manual-Press and release the “Test Button”. The result
will be displayed for 3s and then the display will revert to
zero.
4-3 Automatic Overheat Cut-Out
To test in accordance with the IEE regulations Loop and
PSC testers may dissipate up to approximately 6kW of
energy during the test period, so that after repeated use
the test resistor may overheat. When the temperature
reaches a level that may damage the resistor the
instrument automatically locks out. This is indicated by
the appropriate over temperature symbol in the digital
display.
When the resistor has cooled down, normal testing may
continue.

EN-7
V. OPERATING INSTRUCTIONS
5-1 Correct Wiring
Before pressing the “Test Button” always check the P-E,
P-N, neon lamps for the following light sequence :
P-E Neon must be ON
P-N Neon must be ON
Neon must be OFF
If the sequence of lights is not as above DO NOT
PROCEED with further testing.
The wiring at the socket must be checked. If the
neon is ON there is reversed phase and neon is ON
there is reversed phase and neutral wiring.
5-2 Measurement of the Loop Impedance
Set the instrument to the 200Ωor 2000Ωrange.
If the instrument is set to the 20Ωrange slight sparking
may occur when testing with the external earth probe
although the unit has been designed to minimize this.
Connect the lead to the instrument.
Plug the mounded mains plug to the socket being
tested.
Check the neons are lit as indicated in section 5-1.
If not DO NOT PROCEED – check wiring.
 Note the mains voltage if required.

EN-8
 Press the “Press to Test” button. The value of loop
impedance will be displayed with the appropriate units.
A bleep will sound on completion of the test.
For best results always test on the lowest possible
range.
No harm will be done to the instrument by selecting too
low a range.
5-3 External Earth Probe
The phase earth loop impedance of exposed metal of
bonding, portable appliances or metal conduit etc., can
be tested using the external earth probe provided.
Connect the unit to the socket as normal. Plug the
external earth probe into the instrument. This breaks
the earth continuity at the socket and the P-E lamp
should go out. When the probe is connected to any
other earth point the P-E lamp should light up.
The point at which the probe is connected becomes the
earth point (instead of at the socket).

EN-9
5-4 Measurement of Prospective Short Circuit Current
Note : There units are only intended for single phase
operation.
Set the instrument to the 20kA range.
Connect the test lead to the instrument.
Attach the plug to the socket to be tested.
Check that the neons are lit in the sequence indicated
in section 5-1.
If not, disconnect from the mains and check the wiring
at the socket.
Press the “Press to Test” button. The prospective
short circuit current (PSC) will be directly displayed on
the LCD with the appropriate units. This will remain for
3s and then revert to zero.
An audible beep will sound on completion of the test.
For best results always test on the lowest possible
range.
Note : For loop impedance greater than 50 Ω (prospective
short circuit current < 5A) it is not possible to obtain
an accurate reading of prospective short circuit
current and the unit is designed to lock out all psc
ranges by showing the over-range symbol “ OL ”.
Normally PSC tests are conducted at point of origin, e. g.
distribution boards, between phase and neutral.
When conducting PSC tests at socket outlets, a test will
be conducted between phase and earth due to the fixed
wiring of the moulded mains plug.