(at all ranges except V )
5. Insulation Resistance Measurement (M
Ω
)
5.1. Preparation for measurement
·
Select the required "Test Voltage (50V/100V/250V/500V/1000V)"
by changing the "Function Selector Switch".
·
Connect the test probes firmly to the circuit under test.
Note !
Insulation resistance can only be measured at voltage free
object. Hence the circuit under test must be switched o
ff
,
de-energized and isolated before carrying out any insulation
resistance measurement.
When measuring high-ohmic insulation resistance do not
touch the measurement cables.
If an interference
voltage
> 25V is present
within
the
system,
insulation
resistance
measurement
is disabled.
The instrument
defaults
to the default
voltmeter
and
displays the value of the interference voltage on the LCD.
Also
the instrument
indicates
this
additionally
by an
acoustic signal.
HIGH-VOLTAGE
Do not touch the conductive ends of the test probes
after insulation resistance measurement has been
activated at the instrument.
A current with a value of 2 mA (limited by the instrument)
may flow over your body, and although
this is not life
endangering, the electric shock is distinctly perceptible.
If you are taking a measurement at a capacitive device under test, for
example
a cable, it may be charged
with as much as
1000V, depending upon the selected nominal voltage. Touching the
device under test after measurement may be life endangering in such
cases!
5.2
Insulation resistance measurement
The instrument
provides
flexibility
for both manual
and
continuous (for a pre-selectable time) insulation - resistance
measurement.
5.2.1 Manual Insulation resistance measurement :
In manual Insulation resistance measurement, Press and hold "TEST"
key until the display has stabilized. Insulation resistance measurement is
ended when the yellow TEST key is released. Instrument will continue to
show the last reading for few seconds even after releasing the "TEST
key".
Note !
The instrument's batteries are depleted during insulation
resistance measurement. Only press and hold the TEST key
as long as it is necessary to take the reading in the manual
measurement mode. Continuous measurement as described
below should be performed, if absolutely necessary.
7
14
11.1 Description of Menu Items :
11.1.1 Setting the GoNoGo values :
Operating Order :
Basic
noGo
nnnn
Display
Setting :
nnnn = noGo limit values in M
Ω
(for Insulation ranges)
nnnn = noGo limit values in
Ω
(for Ohm and Continuity)
1.Now scroll through di
ff
erent values using the key until
you come across required value.
2.To save this value press key. After saving, this will take
you to basic display.
3.To go back without saving press "ESC" key. This will take you to
main menu "noGo"
4.To go back to basic display from main menu "noGo" use "ESC" key.
11.1.2 Setting the Timer values
(Only at Insulation Resistance measurement ranges)
Operating Order :
Basic
noGo
ti mm:ss
display
Setting : mm= minutes, ss = seconds
1. Now scroll through di
ff
erent values using the key until
you come across required value.
2. To save this value press key. after saving, this will take
you to basic display.
3. To go back without saving press
"ESC"
key. This will take you to
main menu "ti"
4. To go back to basic display from main menu "ti" use
"ESC"
key.
11.1.3 To see the stored values
(at all ranges except V )
Operating Order :
Basic
noGo
ti reCL nnnn
display
1. You can now see the first stored value. The scale pointer is used
to indicate the number (out of 10) of the displayed stored value.
2. Now you can view the successive stored value using the
key. The scale pointer also increments to indicate the number
(out of 10) of the displayed stored value.
3. To go back press
"ESC"
key. This will take you to
main menu "reCL"
4 To go back to basic display from main menu "reCL" use
"ESC"
key.
Table for default values :
NoGo
ti
reCI
50V
100V
250V
500V
1000V
Ohm
Cont
V
1 M
Ω
1 M
Ω
5 M
Ω
5 M
Ω
500 M
Ω
00
Ω
5
Ω
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00:00 (Manual)
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0.00
0.00
0.00
0.00
0.00
0.00
0.00
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