IEC 61010-031:2002/AMD1:2008

IEC 61010-031
Edition 1.0 2008-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Safety requirements for electrical equipment for measurement, control and
laboratory use –
Part 031: Safety requirements for hand-held probe assemblies for electrical
measurement and test
Règles de sécurité pour appareils électriques de mesurage, de régulation et de
laboratoire –
Partie 031: Prescriptions de sécurité pour sondes équipées tenues à la main
pour mesurage et essais électriques

IEC 61010-031 A1:2008
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IEC 61010-031
Edition 1.0 2008-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Safety requirements for electrical equipment for measurement, control and
laboratory use –
Part 031: Safety requirements for hand-held probe assemblies for electrical
measurement and test
Règles de sécurité pour appareils électriques de mesurage, de régulation et de
laboratoire –
Partie 031: Prescriptions de sécurité pour sondes équipées tenues à la main
pour mesurage et essais électriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
N
CODE PRIX
ICS 19.080 ISBN 2-8318-9600-2
– 2 – 61010-031 Amend. 1 © IEC:2008
FOREWORD
This amendment has been prepared by IEC technical committee 66: Safety of measuring,
control and laboratory equipment.
The text of this amendment is based on the following documents:
CDV Report on voting
66/383/CDV 66/394/RVC
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
Page 3
CONTENTS
Replace the titles of 6.6 and 6.7, as follows:
6.6 Voltage tests
6.7 Constructional requirements
Add, on page 5, the titles of new Clause 13 and Subclauses 13.1 and 13.2, new Figures 10,
11, and 12, and of new Table 9:
13 Prevention of HAZARD from arc flash and short-circuits
13.1 General
13.2 Exposed conductive parts
Figure 10 – Examples of type D PROBE ASSEMBLIES
Figure 11 – Treatment of the insulation of probe cable
Figure 12 – Pulley for the treatment of Figure 11

Table 9 – Forces for flexing/pull test for single core probe cable

61010-031 Amend. 1 © IEC:2008 – 3 –
Page 11
1.1 Scope
Add a new item d):
d) Low-voltage attenuating and non-attenuating PROBE ASSEMBLIES (type D), that are RATED
for direct connection only to voltages not exceeding 33 V r.m.s., or 46,7 V peak, or
70 V d.c., and are suitable for currents exceeding 8 A.
Amend the text of the first dashed item of the note as follows:
– are not within the definitions of types A, B, C, or D, or,
1.2  Object
1.2.1  Aspects included in scope
Add a new item e):
e) arc flash (see Clause 13).
Page 15
3 Definitions
3.1.4
PROBE ASSEMBLY
Replace the existing note with the following:
NOTE See Figures 1, 2, and 10 for examples of PROBE ASSEMBLIES and an explanation of the function of their
parts.
Page 21
3.5.6
POLLUTION degree
Replace the title and text with the following:
POLLUTION DEGREE
a numeral indicating the level of POLLUTION that may be present in the environment

– 4 – 61010-031 Amend. 1 © IEC:2008
3.5.6.1
POLLUTION degree 1
Replace the title with the following:
POLLUTION DEGREE 1
3.5.6.2
POLLUTION degree 2
Replace the title with the following:
POLLUTION DEGREE 2
3.5.6.3
POLLUTION degree 3
Replace the title with the following:
POLLUTION DEGREE 3
Page 25
Add the following new Figure 10 after Figure 2:

61010-031 Amend. 1 © IEC:2008 – 5 –

IEC  076/08
Key
1 connector
2 jaw
3 hand-held area of crocodile clip or clamp
Figure 10 – Examples of type D PROBE ASSEMBLIES

Page 31
4.4.3 Duration of tests
Replace the last sentence of the second paragraph with the following sentence:
If the minimum operating current of the fuse is not reached in the test, the PROBE ASSEMBLY
shall be operated for a period corresponding to the maximum fusing time or continuously for
1 h or 4 h, as specified above.

– 6 – 61010-031 Amend. 1 © IEC:2008
Page 35
5.1.2 Identification
In Table 1, replace row 7 with the following text:
Number Symbol Reference Description

7 –––– –––– Not used
Page 37
5.1.5 Parts protected by DOUBLE INSULATION or REINFORCED INSULATION
Replace the existing title and text of the subclause with the following:
5.1.5 Not used.
5.1.6 RATING
Replace the first sentence of the third paragraph with:
For type A and type D PROBE ASSEMBLIES only, the maximum RATED current of the PROBE
ASSEMBLY shall be marked together with the maximum RATED voltage-to-earth.
5.2 Warning markings
In the fourth paragraph of 5.2, on page 39, replace the reference to “9.2“ by “9.1“.

Page 41
5.4.3 Operation
Add an item i), as follows:
i) a warning that the measurement category of a combination of a PROBE ASSEMBLY and an
accessory is the lower of the measurement categories of the PROBE ASSEMBLY and of the
accessory.
Page 43
6.2 Determination of ACCESSIBLE parts
Delete the reference “(see 6.4, note 1)”, at the end of the first paragraph.

61010-031 Amend. 1 © IEC:2008 – 7 –
Page 49
6.3.1.3 Capacitance
Add a new last paragraph, as follows:
See Figure 5.
Page 51
6.3.2.3 Capacitance
Replace the title of Figure 5 by the following:
Figure 5 – Charged capacitance level in NORMAL CONDITION and SINGLE-FAULT CONDITION
(see 6.3.1.3 and 6.3.2.3)
Page 57
6.4.3 Cables
Add a new item d), as follows:
d) for type D PROBE ASSEMBLIES, 125 V.
Replace the existing conformity statement with the following new conformity statement:
Conformity is checked by inspection, and by the voltage tests of 6.6 (without humidity
preconditioning), using metal foil tightly wrapped around a 150 mm ± 20 mm length of cable.
Test voltage values are based on the CLEARANCES of the probe listed in Table 3 for
measurement categories II, III or IV, and on the calculation of 6.5.2.2 for measurement
category I or if no category is specified.
6.4.4 PROBE TIPS
Replace the existing text of 6.4.4 with the following text, but retain Figure 6:
PROBE TIPS that may be HAZARDOUS LIVE during NORMAL USE shall meet the following
requirements (see 6.1.1).
If a conductive part of a PROBE TIP can become HAZARDOUS LIVE, a BARRIER shall be fitted
to reduce the danger of touching an exposed conductive part of the PROBE TIP, and to
provide an indication of the limit beyond which it may be hazardous to touch the probe
body during use.
CLEARANCES and CREEPAGE DISTANCES between the HAZARDOUS LIVE part of the PROBE TIP
and the hand-held side of the BARRIER shall be those specified for REINFORCED INSULATION.
Figure 6a gives an example of PROBE ASSEMBLIES with BARRIERS and indicates applicable
CLEARANCES and CREEPAGE DISTANCES.

– 8 – 61010-031 Amend. 1 © IEC:2008
Spring-loaded squeeze PROBE ASSEMBLIES RATED for WORKING VOLTAGES up to 1 kV (see
Figure 6b) are acceptable without a BARRIER provided that:
a) actuation of the spring-loaded mechanism prevents the OPERATOR touching a HAZARDOUS
LIVE part; and
b) the CLEARANCE and CREEPAGE DISTANCE between the PROBE TIP and the nearest surface
which the OPERATOR needs to touch to actuate the mechanism is increased by an
additional protective distance of 45 mm.
Insulated crocodile and similar clips (see Figure 6c) RATED for measurement category I or II
which require finger pressure at about 90° to the axis of the clip are acceptable without a
BARRIER, provided that there is a tactile indicator to indicate the limit of safe access for the
OPERATOR.
NOTE See Clause 13 for additional requirements for the exposed conductive parts of PROBE TIPS.
Conformity is checked by inspection and measurement.

Page 61
6.5 CLEARANCES and CREEPAGE DISTANCES
Replace, in the first line of the first paragraph, the reference to “6.5.4” by “6.5.3”.

6.5.1.1 CLEARANCES
Replace, on page 63, in the second line of the fifth paragraph, the words “dielectric strength
test” with the words “voltage test”.

Page 67
6.5.2.2 CLEARANCE values for measurement category I
Replace the note with the following note:
NOTE The following is an example:
CLEARANCE for REINFORCED INSULATION for a peak WORKING VOLTAGE of 3 500 V and a maximum transient
overvoltage of 4 500 V.
U = U + U = (3 500 + 4 500) V = 8 000 V
M W t
F = (1,25 U / U ) – 0,25 = (1,25 × 3 500/8 000) – 0,25 = 0,297
W M
D = 16,7 mm; D = 29,5 mm (values for 8 000 × 1,6 = 12 800 V)
1 2
CLEARANCE = D + F(D – D ) = 16,7 + 0,297(29,5 – 16,7) = 16,7 + 3,8 = 20,5 mm
1 2 1
61010-031 Amend. 1 © IEC:2008 – 9 –
Page 73
6.6 Dielectric strength tests
Replace the existing title with:
6.6 Voltage tests
Page 75
6.6.4 Voltage tests
Replace the existing title with:
6.6.4 Test voltages
In the fourth paragraph, replace “10 μs” with “10 ms”.

Page 79
6.7 Constructional requirements for protection against electric shock
Replace the existing title with:
6.7 Constructional requirements

Page 83
Table 8 – Pull force for cable attachment
Replace Table 8 with the following table:
Cross section of the conductor (a) Pull force
mm N
a ≤ 2,5 36
2,5 < a ≤ 4 50
4 < a ≤ 6 60
6 < a ≤ 10 80
10 < a ≤ 16 90
NOTE For cables with multiple conductors, the cross-sectional area (a) is calculated as
the sum of the cross-sectional areas of the individual conductors.

6.7.4.2 Flexing/pull test
Replace the existing text of 6.7.4.2 with the following text, but retain the existing Figure 7:
The test is shown in Figure 7. With the probe body or equipment or connector clamped so that
it ca
...