RS PRO IIT 1601 User manual

Instruction Manual
IIT 1601
Autoranging Insulation Tester
FREN IT DE ES

TABLE OF CONTENTS
TITLE PAGE
SAFETY INFORMATION....................................................1
1. SPECIFICATIONS ..........................................................2
1-1 General Information .................................................2
1-2 Electrical Specifications ...........................................4
2. PARTS & CONTROLS....................................................6
3. BEFORE OPERATION ..................................................7
3-1 How to connect test leads ........................................7
3-2 Battery Check & Replacement .................................7
3-3 Test Leads Check ....................................................7
4. AC VOLTAGE MEASUREMENTS..................................8
5. LOW RESISTANCE (CONTINUITY)
MEASUREMENTS..........................................................8
6. INSULATION RESISTANCE MEASUREMENTS..........9
7. AUTO POWER OFF......................................................10
8. POWER TOOLS AND SMALL APPLIANCES ..............11

EN-1
SAFETY INFORMATION
The circuit under test must be de-energized and isolated before
connections are made except for voltage measurement.
Circuit connections must not be touched during a test.
After insulation tests, capacitive circuits must be allowed to be
discharged.
Test leads (including crocodile clips), must be in good order,
clean and have no broken or cracked insulation.
Do not push test button before all connection and preparation is
done. The instrument must only be used by suitably trained and
competent persons.
Warnings and Safety symbols:
Caution, refer to this manual before using the meter.
Dangerous voltages.
Meter is protected throughout by double insulation or
reinforced insulation.
Complies with IEC1010-1
When servicing, use only specified replacement
parts.

EN-2
1. SPECIFICATIONS
1-1 General Information
Environment conditions ：
 Installation Category II
 Pollution Degree 2
 Altitude up to 2000 meters
 Indoor use only
 Relatively humidity 80% max.
Operation Ambient 0° C - 40° C
Maintenance & Cleaning:
 Repairs or servicing not covered in this manual
should only be performed by qualified personnel.
 Periodically wipe the case with a dry cloth.
Do not use abrasives or solvents on this instrument.
Display:
80mm x 50mm LCD Display. 3 3/4 Digital readout with
analog bar indication.
Back light Operation:
Press back light button to turn on the LCD back light, it
will extinguish after 30 sec. Alternatively one can turn it
off before 30 sec by pressing the back light button again.
Measurement Range:
600V/ACV, 400 Ω , 4000M Ω /250V, 4000M Ω /500V,
4000M Ω /1000V
Sampling Rate:
2.5 sample/sec for digital reading.
10 sample/sec for analog indication.

EN-3
Over Range Indicator:
“
－ －
” will be displayed.
Low Battery Indication:
The ( ) is displayed when the battery voltage
drops below the operating voltage.
Operating Temperature and Humidity
：
0
℃
to 40
℃
( 32
℉
to 104
℉
)below 80% RH
(noncondensing)
Storage Temperature and Humidity:
-10
℃
to 60
℃
( 14
℉
to 140
℉
) below 70% RH
(noncondensing)
Power Source:
DC12V (8 x 1.5V Size “AA” battery or equivalent )
Power Consumption:
Approx. 90mA (4000M
Ω
/1000V range) (Output open
Circuit)
Approx. 60mA (4000M
Ω
/ 500V range) (Output open
Circuit)
Approx. 45mA (4000M
Ω
/ 250V range) (Output open
Circuit)
Approx. 20mA (ACV OHMS range)
Dimensions:
190 (L) x 140 (W) x 77(H) mm (7.5 x 5.5 x 3 inch)
Weight:
Approx. 900g (2 LB), include battery
Accessories
：
Test leads, 8 x AA battery, carrying case, operation
manual, 2 x crocodile clip.

EN-4
1-2 Electrical Specifications
Accuracies are specified as:
±(...% of reading + ...digits) at 23°
C±5° C, below 80% RH.
 OHMS & Continuity Sounder
Range Resolution Accuracy
Max. open
Circuit
Voltage
Max. Short
Circuit
Current
Overload
Protection
400
Ω
0.1
Ω
1%+5
12.8V 280mA*
220Vrms
* Minimum Value: 200mA
Range Resolution Beeper Active
Max. open
Circuit
Voltage
Overload
Protection
0.1
Ω
Resistance<40
Ω
12.8V 220Vrms
 AC Voltage (40Hz
～
500Hz)
Range Resolution
Accuracy
(above 1V)
Input
Impedance Overload Protection
600V 0.1V 1.5%+3 4.5M
Ω
750Vrms

EN-5
 Meg OHMS (Auto Range)
Range Resolution Accuracy Terminal Voltage
4M
Ω
/40M
Ω
/400M
Ω
/4000M
Ω
/250V
250V
＋
20%
～
-0%
4M
Ω
/40M
Ω
/400M
Ω
/4000M
Ω
/500V
500V
＋
20%
～
-0%
4M
Ω
/40M
Ω
/400M
Ω
/4000M
Ω
/1000V
1K
3%+5
(<2000M)
5%+5
(>2000M)
1000V
＋
10%
～
-0%
Range Test Current Short circuit current
4000M
Ω
/250V 250K
Ω
(load)
4000M
Ω
/500V 500K
Ω
(load)
4000M
Ω
/1000V
1mA
1M
Ω
(load)
≦
1.5mA

EN-6
2. PARTS & CONTROLS
 LCD display
 Mega Ohm TEST button
 Maga Ohm TEST power LOCK button
 Data hold button
 Back light button Auto power OFF (wake up)
 Function selector
 Storage compartment
 Lo measuring terminal
 Hi measuring terminal
 Top cover

EN-7
3. BEFORE OPERATION
3-1 How to connect test leads
Connect the red test lead into the “ Hi ” terminal and the black
lead into the “ Lo” terminal.
3-2 Battery Check & Replacement
a) . If battery power is not sufficient the LCD will display
“ ”. Replacement of 8 x new batteries, type 1.5V
size “AA” is required.
b) . Use a screwdriver to unscrew the screw secured on
battery cover, Take out the used batteries and replace 8
x new batteries.
c) . Replace the battery cover and secure the screw.
3-3 Test Leads Check
Set the range select switch to the 400
Ω
range. Connect the
crocodile clips with the test lead tips, clip crocodile clips
together. The indicator should read <0.5
Ω
. When the leads
are not connected the display will read infinity indicated by
“
－ －
”
. This will ensure that test leads are in good working
condition.

EN-8
4. AC VOLTAGE MEASUREMENTS
a). Set the range switch to
～
V position
b). Connect red test lead to “ Hi ” terminal and black test lead to
“ Lo ” terminal.
c). Connect test leads IN PARALLEL to the circuit being
measured.
d). Read the voltage value on LCD.
5. LOW RESISTANCE (CONTINUITY) MEASUREMENTS
a). Set the range switch to
Ω
position.
b). Connect the red test lead to the HI terminal and black test
lead to the Lo terminal.
c). Connect the tips of the test leads to both ends of the circuit
under test and reading is displayed on the LCD.
d). When the impedance on circuit is below 40
Ω
, the internal
sounder will operate continuously.
e). Press the button to hold data.
f). Press again to release data hold operation.
WARNING
Max test voltage=12V, 200mA
Do not use this range to conduct a diode test.
Do not proceed with this test unless the circuit to be tested
has an ACV reading of zero.

EN-9
6. INSULATION RESISTANCE MEASUREMENTS
a). Manual Testing Mode:
Set the selector switch to the test voltage required.
Connect the test leads, first to the instrument, and then the
isolated item under test.
Press the test button to activate the test voltage and the
reading will be displayed on the display, the internal sounder
will operate to warn of high voltage.
When the test button is released the test voltage will be
deactivated and the test result will be held automatically.
b). 3 Minutes Test Power Lock Mode:
Set the selector switch to the test voltage required.
Connect the test leads, first to the instrument, and then the
isolated item under test.
Press the Lock button to set the testing mode to 3 minute
Lock Mode and the “LOCK” symbol will be displayed on the
LCD.
Press the TEST button once to begin the 3 minute test period
and activate the test voltage. The reading will be shown on
the LCD display.
Press the TEST button again to deactivate the test voltage
before 3 minutes have elapsed and the reading will be held
automatically.

EN-10
If the testing process is not interrupted within 3 minutes, the
test voltage will turn off automatically.
The analog display bar can indicate range up to 10G
Ω
, when
the reading is between 4G
Ω
to 10G
Ω
, the LCD will show
“
－
HI
－
”, when the resistance is higher than 10G
Ω
, the LCD
will show “
－
OL
－
”.
Note: The charge stored in the tester will be discharged
automatically when the testing process is finished.
WARNING
Do not proceed with this test unless the ACV reading of
the circuit to be tested is Zero.
7. AUTO POWER OFF
The tester will turn itself off if there are no switch or
button operations after 30 minutes.
Note: auto power off consumes low power and it is
recommended that the instrument is switched to
OFF when not in use. This is particularly important
at the end of the working day. By properly switching
the instrument OFF the batteries will be conserved.

EN-11
. POWER TOOLS AND SMALL APPLIANCES
This test would also apply to other similar equipment that has a
line cord. For double insulated power tools, the megohmmeter
leads are shown connected to the power cord and to some metal
part of the tool (e.g. chuck, blade).
Note: The switch of the device must be in the “ON” position and
the main power should be disconnected.
MOTORS
AC-Disconnect the motor from the line by disconnecting the
wires at the motor terminals or by opening the main switch. If
the main switch is used and the motor also has a starter then the
starter must be held, by some means, in the “ON” position. In
the latter case, the measured resistance will include the
resistance of the motor, wire and all other components between
the motor and the main switch. If a weakness is indicated, the
motor and other components should be checked individually.

EN-12
If the motor is disconnected at the motor terminals, connect one
megohmmeter lead to the grounded motor housing and the other
lead to one of the motor leads.
DC-Disconnect the motor from the line. To test the brush rigging,
field coils and armature connect one megohmmeter lead to the
grounded motor housing and the other lead to the brush on the
commutator. If the resistance measurement indicates a
weakness, raise the brushes off the commutator and separately
test the armature, field coils and brush rigging by connecting one
megohmmeter lead to each of them individually, leaving the
other connected to the grounded motor housing. The above also
applies to DC Generators.

EN-13
CABLES
Disconnect the cable from the line and disconnect the opposite
end to avoid errors due to leakage from other equipment. Check
each conductor to ground and /or lead sheath by connecting one
megohmmeter lead to a ground and /or lead sheath and the
other megohmmeter lead to each of the conductors in turn.
Check insulation resistance between conductors by connecting
megohmmeter leads to conductors in pairs.