Gossen MetraWatt METRISO 1000 IR User manual

METRISO®1000 IR
Insulation Tester 3-348-712-02
4/1.00
Operating Instructions

2GOSSEN-METRAWATT
(11)(10)(8)(9)(7)(6)(5)(4)
(1)
(2)
(3)
(7)

GOSSEN-METRAWATT 3
(1) Pushbutton for „CONTINUOUSLY ON“
(2) Pushbutton
•for switching to autoranging with ISO-Ωmeasurement,
•for measuring with automatic polarity reversal
with Ωmeasurement and
for switch-on of the lamp in the probe
(3) Pushbutton
•for manual switching to higher measuring ranges
with ISO-Ωmeasurement and
•for Ω-measurement with current direction from + to –
(4) Pushbutton
•for manual switching to lower measuring ranges
with ISO-Ωmeasurement and
•for Ω-measurement with current direction from – to +
(5) LCD display
(6) Rotary switch for function selection
(7) Supports for fastening of the carrying strap
(8) Measurement pushbutton
(9) Fixed probe with lamp (negative pole)
(10) Fixed probe (positive pole)
(11) Pickup clip for attachment to probes
(12) Holder for probe with lamp (9)
(13) Probe holder (10)
(14) Carrying strap
(14)
(12) (13)

4GOSSEN-METRAWATT
Contents
1 Safety precautions .............................................. 5
2 Applications ......................................................... 6
3 Getting started ..................................................... 6
3.1 Inserting the batteries ............................................ 6
3.2 Testing the batteries .............................................. 6
3.3 Fastening the carrying strap and the probe holders .. 8
3.4 Switching the tester on and off ............................... 8
4 LCD display .......................................................... 9
5 Detecting dangerous touch potentials ................ 9
6 Measuring DC and AC voltages ......................... 10
7 Measuring the insulation resistance ................. 11
7.1 ISO-Ωmeasurement up to 3 GΩ
with autoranging .................................................. 11
7.2 ISO-Ωmeasurement up to 3 GΩ
with manual range selection ................................. 14
7.3 Evaluation of the measured values ........................ 15
7.4 ISO-Ωmeasurement up to 30 GΩ ...................... 17
8 Measuring low-ohmic resistances (0 ... 30 Ω) .. 17
8.1 Measuring with automatic polarity reversal ............ 17
8.2 Measuring with manual polarity reversal ................ 18
8.3 Finding the max. display values
regarding the maximum service error: .................. 19
9 Specifications .................................................... 20
10 Maintenance ...................................................... 25
10.1 Messages on the LCD display ............................... 25
10.2 Testing the LCD display ........................................ 25
10.3 Batteries ............................................................. 26
10.4 Fuse ................................................................... 26
10.5 Lamp in the probe ............................................... 27
10.6 Case ................................................................... 27
11 Repair and Replacement Part Service ............... 27
12 Product Support ................................................ 27

GOSSEN-METRAWATT 5
1 Safety precautions
The insulation tester has been constructed and tested to
comply with IEC 61557 / EN 61557 / VDE 0413 und IEC
61010-1 / EN 61010-1 / VDE 0 411-1.
When properly used, the safety of both the user and the
tester is assured. It is not assured, however, if the tester is
misused or carelessly handled.
To maintain the safe and proper condition of the tester and to
ensure Its safe operation, it is absolutely necessary to carefully
and completely read these operating instructions before using the
tester. These instructions must be followed in all respects.
Repair and replacement of parts
When opening the tester, live parts may be exposed. The
tester must be disconnected from all voltage sources prior
to repair or replacement of parts. If a repair cannot be
avoided unless the tester is open and live, this must only be
performed by a qualified person who understands the dan-
ger involved.
Faults and extraordinary stress
When it must be assumed that safe operation is no longer
possible, take the tester out of service and secure it against
accidental use. It is assumed that safe operation is no
longer possible,
• when the tester shows obvious signs of damage,
• when the tester no longer functions correctly,
• after prolonged storage under adverse conditions,
• after severe transport stress.
Attention!
!
The fixed test leads have a double insulation in dif-
ferent colors. You can readily recognize damaged
leads by the light insulation on the inside.
The VDE Test Office has approved the use of the VDE-GS
mark (tested safety) for the insulation tester.
Meaning of the symbols on the device
Warning of a danger point
(Attention, refer to documentation)
Double or
reinforced all-insulation
Mark approval
by testing board
EU-Conformity Mark
!

6GOSSEN-METRAWATT
2Applications
The insulation tester complies with the following specifications:
IEC 61557 / EN 61557 / VDE 0413 “Measuring and moni-
toring facilities for testing the electrical safety in lines with
nominal voltages up to AC 1000 V and DC 1500 V“.
Part 1 „General“;
Part 2 „Insulation resistance“;
Part 4 „Resistance measuring devices“.
It is suited to measure the insulation resistance of electrically
dead devices and systems having nominal voltages up to
1000 V and to test the resistance of ground conductors,
protective conductors and equipotential conductors includ-
ing their connections and connectors.
In addition, the fester has a 1000 V measuring range for
DC and AC voltage which complies with DIN VDE 0100
Part 610. This makes it particularly advantageous to test
devices for the absence of voltage and to discharge capac-
itive devices under test.
The most important applications of the insulation tester are
found in testing of systems and appliances such as required
by DIN VDE 0100, 0 105, 0141, 0701 and 0702 specifica-
tions, for example. Furthermore, it is possible to perform a
„test of the discharge capability for electrostatic charges for
floor coverings in explosion-hazardous rooms“ according to
DIN 51 953.
3 Getting started
3.1 Inserting the batteries
Attention!
!
Make sure that the rotary switch (6) is set to the
„OFF“ position prior to opening the battery com-
partment and that the tester is completely discon-
nected from all external circuits!
íUndo the two slotted screws on the bottom of the tester
with an adequate tool and remove the cover of the bat-
tery compartment.
íInsert 6 each 1.5 V mono-cells to IEC R20 (zinc-carbon)
or to IEC LR20 (alkaline-manganese) in the battery com-
partment, paying attention to the correct polarity in line
with the given symbols.
íReplace the cover of the battery compartment and
tighten the screws.
3.2 Testing the batteries
When measuring the insulation resistance, the load on the
batteries is different on the three nominal voltage ranges.
That means, for example, that the „charging state“ of the
six mono-cells no longer assures compliance with the error
limits at a nominal voltage of 1000 V while many measure-
ments can still be made with the specified accuracy at
250 V. That is why the tester offers the possibility to test the
batteries under operating conditions for each of the three
nominal voltages. The lamp in the probe is on at times.

GOSSEN-METRAWATT 7
Test for nominal voltage 500 V and for the „Ω“ range:
íSet the rotary switch (6) to position „-Il-“.
The digital display shows the battery voltage at a simulated
load for the 500 V nominal voltage on the LCD display (5).
At the same time, the analog indicator shows the nominal
range of use of the battery voltage. You can quickly judge
the charging state of the battery set by the location of the
pointer.
The battery test for the nominal voltage 500V and for the
„Ω“ range is recognized by two superimposed horizontal
lines preceding the digital display.
Test for nominal voltages 250 V and 1000 V:
íSet the rotary switch (6) to position „-I|-“ as described
above.
íFor the test of the nominal voltage 250 V, briefly press
the „RANGE↓“ pushbutton (4), or briefly press the
„RANGE↑“ pushbutton (3) for the test for the nominal
voltage 1000„RANGE↑“V.
The battery voltage is displayed in digital and analog form,
as described above.
For recognition, a horizontal line precedes the digital display
for 250 V nominal voltage and three superimposed lines for
1000 V nominal voltage.
If the battery test reveals that the battery voltage is below
the lower limit, „U LO“ is shown on the LCD display (5).
The battery test is automatically stopped after about
10 seconds. „HOLD“ is shown on the LCD display (5) in
addition to the digital display and the analog indication.
This presentation is maintained until the tester automatically
switches back to „standby“ after approximately 3 minutes,
until you press the measurement pushbutton (8) or until you
set the rotary switch (6) to another position.
You start a new battery test by pressing the measurement
pushbutton (8).

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3.3 Fastening the carrying strap and the probe holders
Fasten the carrying strap
(14) and the two probe
holders (12) and (13) as
shown in the following fig-
ure. Make sure to fix the
holder for the slim probe
(10) at the left and the
holder for the probe with
lamp and pushbutton (9) at
the right.
3.4 Switching the tester on and off
„Standby“ for minimum power consumption
íSet the rotary switch (6) from the „OFF“ position to posi-
tion „1000 V “, to one of the „ISO-Ω“ or to the „Ω“
position.
When set to the „1 000 V “ position, the measuring range for
DC and AC voltage is switched on. Digital display and ana-
log indication are presented.
When set to one of the three „ISO-Ω“ positions, the tester is
switched to „standby“. The digital display only shows the
decimal point together with the numeral 3 and the unit MΩ,
and the analog indicator shows the measuring range 500 V
or 1000 V in line with the selected nominal voltage. 500 V
are displayed in the 250 V range.
When set to the „Ω“position, the tester is switched to
„standby“.The digital display only shows the decimal point
together with the number 30 and the unit „Ω“.
After measuring at the „Ω“ and „ISO-Ω“ positions, the tester
automatically switches to „standby“,
• when the rotary switch is not operated for approximately
3 minutes and when no pushbutton is pressed
• when the measured values does not change for approxi-
mately 3 minutes
• when no voltage above 25 V is applied to the probes for
more than 3 minutes on the „1000 V “range
íTo reactivate the tester, press any pushbutton on the
tester or the pushbutton (8) in the probe, or set the
switch (6) to another position.
Probe holder
Carrying strap
Catch
METRISO

GOSSEN-METRAWATT 9
„CONTINUOUSLY ON“
When set to the „ISO-Ω“ and „Ω“ positions, the tester
measures only as long as you keep the pushbutton (8) in
the probe pressed (an exception is the „AUTO“ function at
position „Ω“, see section 8.1). When set to these positions,
you also can switch the tester „CONTINUOUSLY ON“:
íBriefly press the measurement pushbutton „( )“ (1) on
the tester. You can cancel „CONTINUOUSLY ON“ by
• again pressing the measurement pushbutton „ “ (1) on
the tester
• pressing the pushbutton (8) in the probe
• operating the rotary switch (6)
Note!
☞
Electrical discharges and high-frequency interfer-
ences can cause incorrect displays. Briefly set the
rotary switch (6) to another position; the tester is
thus reset.
4LCDdisplay
The measured values are shown on the LCD display (5) in
digital and analog form.
The digital display shows the measured value with decimal
point and unit. The numerals immediately under the decimal
points show the upper limit of the selected measuring
range. When the measuring range is exceeded, „OL“ is dis-
played in place of the measured value.
The analog indicator with pointer presentation gives the
dynamic response of a moving-coil movement. The analog
display is of particular advantage when observing variations
of measured values and transients.
When the upper range limit is exceeded, a triangle is shown
at the end of the analog scale.
5 Detecting dangerous touch potentials
The tester detects dangerous touch potentials on the probes
• regardless of being switched on or not
• regardless of the selected function
• regardless of the batteries being inserted or not.
Voltages above 25 V are
signalled on the LCD dis-
play (5) by a warning tri-
angle.
The display of the warn-
ing triangle is made with-
out auxiliary voltage. You can recognize the triangle already
from approximately 10 V up with low contrast. Full contrast
is obtained at 25 V.
The warning triangle directs your attention to a hazardous
voltage on the probes. You can determine the voltage value
on the voltage measuring range.
Attention!
!
When the rotary switch (6) is set to the „Ω“ posi-
tion, the fuse blows when an external voltage is
applied to the probes!
Never switch to the „Ω“ range when an external
voltage is applied as this could damage the switch
contacts!

10 GOSSEN-METRAWATT
6 Measuring DC and AC voltages
Set the rotary switch (6) to the „1000 V “ position.
íScan the measuring points with the two probes without
pressing the measurement pushbutton (8) in the probe.
The tester alternately measures the DC and the AC voltage
and displays the higher measured value in both digital and
analog form. The symbol behind the „V“ character shows
whether a DC or an AC voltage is displayed.
When the measured value is steady, the word „DATA“ is
shown on the LCD display. A short sound signal points to
this.
íWhen you briefly press the measurement pushbutton (8)
in the probe, the word „HOLD“ is displayed in addition to
„DATA“ and the measured value on the digital display is
held.
If, after storage of the measured value, the voltage drops to
a value below 10 V, the held measured value is cleared the
instant the voltage rises again and „DATA HOLD“ is
blanked.
The digital display then again shows the actual measured
value. The measured value can be held as soon as it has
reached a steady state again.
If you press the measurement pushbutton (8) even though
the measured value is not (yet) stable, only „HOLD“ is
shown and not „DATA“. When pressing the measurement
pushbutton the currently existing measured value is held on
the digital display. The pointer of the analog indicator con-
tinues to constantly follow the actual measured value.
íWhen pressing the pushbutton again, you clear the
measured value. The digital display then shows the
actual measured value.
íYou can use the lamp in the probe (9) to illuminate the
measuring point or the LCD (5). Press the pushbutton
„AUTO / ⊗“ (2). The lamp lights as long as you keep the
pushbutton (2) pressed.
Note!
☞
The permissible overload capacity on the voltage
measuring range is 1200 V .
If this value is exceeded, a sound signal draws
your attention to it.
The input resistance on the voltage measuring
range is 880 kΩ. With a blown or a missing fuse,
the voltage measurement is made with an input
resistance of approximately 5 MΩ.