prEN IEC 61010-2-012:2025

SLOVENSKI STANDARD
01-oktober-2025
Varnostne zahteve za električno opremo za meritve, nadzor in laboratorijsko
uporabo - 2-012. del: Posebne zahteve za opremo za klimatska in okoljska
preskušanja ter drugo opremo za uravnavanje temperature
Safety requirements for electrical equipment for measurement, control, and laboratory
use - Part 2-012: Particular requirements for climatic and environmental testing and other
temperature conditioning equipment
Exigences de sécurité pour appareils électriques de mesurage, de régulation et de
laboratoire - Partie 2-012: Exigences particulières pour appareils d'essais climatiques et
d'environnement, et autres appareils de conditionnement de température
Ta slovenski standard je istoveten z: prEN IEC 61010-2-012:2025
ICS:
19.080 Električno in elektronsko Electrical and electronic
preskušanje testing
27.200 Hladilna tehnologija Refrigerating technology
71.040.10 Kemijski laboratoriji. Chemical laboratories.
Laboratorijska oprema Laboratory equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

66/860/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61010-2-012 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-08-15 2025-11-07
SUPERSEDES DOCUMENTS:
66/847/CD, 66/857/CC
IEC TC 66 : SAFETY OF MEASURING, CONTROL AND LABORATORY EQUIPMENT
SECRETARIAT: SECRETARY:
United Kingdom Ms Stephanie Lavy
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 66 Horizontal Group Safety
ASPECTS CONCERNED:
Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the
final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Safety requirements for electrical equipment for measurement, control, and laboratory use - Part
2-012: Particular requirements for climatic and environmental testing and other temperature
conditioning equipment
PROPOSED STABILITY DATE: 2030
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

IEC CDV 61010-2-012 © IEC 2025
1 CONTENTS
2 CONTENTS . 1
3 FOREWORD . 9
4 INTRODUCTION . 12
5 1. Scope and object . 16
6 1.1.1 Equipment included in scope . 16
7 1.1.2 Equipment excluded from scope . 17
8 1.2 Object . 17
9 1.2.1 Aspects included in scope . 17
10 2. Normative references . 17
11 3. Terms and definitions . 18
12 3.1 Equipment and states of equipment . 18
13 3.2 Parts and accessories . 20
14 3.3 Quantities . 26
15 3.5 Safety terms . 26
16 4. Tests . 28
17 4.3 Reference test conditions . 28
18 4.3.1 Environmental conditions . 28
19 4.3.2 State of equipment . 28
20 4.3.2.1 General . 28
21 4.3.2.101 Heat load . 29
22 4.3.2.102 Humidity and steam . 29
23 4.3.2.103 Lamp and lamp systems . 29
24 4.3.2.104 MECHANICAL MOVEMENT . 29
25 4.3.2.105 Spray generating systems . 29
26 4.3.2.106 VENTILATORS . 29
27 4.3.2.107 Pressures other than those of REFRIGERANT . 30
28 4.3.2.108 REFRIGERANT pressure . 30
29 4.3.2.109 Exhaust and condensate . 30
30 4.3.2.110 Filling and draining systems . 30
31 4.3.2.111 Circulating system . 30
32 4.3.2.112 Gas HEAT TRANSFER MEDIUM . 30
33 4.3.2.113 Properties of liquid HEAT TRANSFER MEDIUM . 30
34 4.3.2.114 Refrigerating equipment intended to be used with other equipment inside
35 the refrigerated compartment . 30
36 4.3.2.115 MOTOR-COMPRESSOR . 30
37 4.4.2 Application of fault conditions . 31
38 4.4.2.10 Cooling . 31
39 4.4.2.11 Heating devices . 32
40 4.4.2.101 MOTOR-COMPRESSOR . 32
41 4.4.2.102 Fluid leakage in the equipment . 32
42 4.4.2.103 Solenoid valve and motorized valve. . 32
43 4.4.2.104 Failure of temperature control . 32
44 4.4.2.105 HUMIDIFIER and dehumidifier . 33
45 4.4.2.106 Speed controller . 33
46 4.4.2.107 Simulate the failure of the controlled and/or restricted environment . 33
47 4.4.3 Duration of tests . 33
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48 4.4.3.1 General . 33
49 4.4.4 Conformity after application of fault conditions . 34
50 4.4.4.1 General . 34
51 5. Marking and documentation . 34
52 5.1.5 TERMINALS, connections and operating devices . 34
53 5.1.5.101 LIQUID CONNECTIONS for HEAT TRANSFER MEDIUM . 34
54 5.1.5.102 LIQUID CONNECTION for filling of BATH TANKS with enclosed CIRCULATORS . 34
55 5.1.5.103 Other LIQUID CONNECTIONS and exhaust opening . 34
56 5.1.5.104 Equipotential TERMINALS . 35
57 5.1.101 Marking for equipment incorporating a REFRIGERANT CIRCUIT . 35
58 5.1.102 Symbols particular to heating and cooling equipment . 36
59 5.2 Warning markings . 36
60 5.2.101 Warning markings for hot surface and/or cold surface . 36
61 5.2.102 Warning markings for GROUP I EQUIPMENT . 36
62 5.2.103 Waning markings for equipment incorporating MECHANICAL MOVEMENT . 37
63 5.2.104 Warning markings for movable immersion CIRCULATOR . 37
64 5.2.105 Warning markings related to manual filling or draining . 38
65 5.2.106 Warning markings related to chemical HAZARD . 38
66 5.2.107 Warning markings for hazardous radiation . 38
67 5.2.108 Warning marking for biohazardous substances . 39
68 5.2.109 Warning markings for WALK-IN EQUIPMENT . 39
69 5.4.1 General . 40
70 5.4.2 Equipment RATINGS . 41
71 5.4.3 Equipment installation . 41
72 5.4.3.101 DRYING-OUT and STANDSTILL . 43
73 5.4.4 Equipment operation . 43
74 5.4.4.101 Cleaning and decontamination . 44
75 5.4.5 Equipment maintenance and service . 45
76 5.4.101 Additional instructions for equipment containing FLAMMABLE REFRIGERANT . 46
77 5.4.102 Additional instructions for EQUIPMENT TYPE E . 48
78 5.4.103 Additional instructions for equipment intended for use with refrigerated LN2 . 49
79 5.4.104 Additional instructions for equipment intended for use with FLAMMABLE
80 LIQUID HEAT TRANSFER MEDIA . 49
81 5.4.105 Additional instructions for equipment incorporating UV-C LAMP systems . 50
82 6. Protection against electric shock . 51
83 6.1.1 Requirements . 51
84 6.3.1 Levels in NORMAL CONDITION . 51
85 6.3.2 Levels in SINGLE FAULT CONDITION. 51
86 6.7.2.2 Solid insulation . 51
87 6.7.2.2.101 DRYING-OUT . 51
88 6.8.1 General . 51
89 6.8.2 Humidity preconditioning . 51
90 6.9.1 General . 52
91 6.10.1 MAINS supply cords . 52
92 7. Protection against mechanical HAZARDS . 52
93 7.3.5.1 Gap limitations between moving parts – Access normally allowed. 52
94 7.4 Stability . 52
95 7.4.101 Movement during operation . 53
96 7.5 Provisions for lifting and carrying . 53
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97 7.5.1 General . 53
98 8. Resistance to mechanical stresses . 53
99 8.1 General . 53
100 8.2.1 Static test . 54
101 8.2.2 Impact test . 54
102 8.101 BATH TANK and liquid vessel of equipment intended for use with FLAMMABLE
103 LIQUID HEAT TRANSFER MEDIA . 55
104 8.102 Liquid connections for connecting to an APPLICATION SYSTEM, supply or
105 draining . 55
106 8.103 Flexible tubing and hose subjected to liquid pressure other than that of the
107 REFRIGERANT . 55
108 8.104 Loading capacity of shelves . 56
109 8.105 Glass doors or windows . 56
110 8.106 Structure requirements for REFRIGERATING SYSTEMS using FLAMMABLE
111 REFRIGERANT . 57
112 8.106.1 The construction requirements . 57
113 8.106.2 Protection against mechanical damage . 57
114 8.106.3 Scratch test for ACCESSIBLE surfaces of REFRIGERANT CIRCUIT containing
115 FLAMMABLE REFRIGERANT . 58
116 8.106.4 Piping joints and fittings . 59
117 8.106.5 HERMETICALLY SEALED JOINT . 59
118 8.106.6 Limit of REFRIGERANT CHARGE for FLAMMABLE REFRIGERANT . 59
119 8.106.7 Connections for CO2 charging or LN2 feeding . 60
120 8.107 Additional requirements for EQUIPMENT TYPE B2 and EQUIPMENT TYPE C1 . 60
121 8.107.1 Determination of maximum REFRIGERANT CHARGE and MINIMUM FLOOR AREA . 60
122 8.107.2 Mechanical requirements . 61
123 8.107.2.2 Drop test with packaging . 61
124 8.107.2.3 Drop test without packaging . 61
125 8.107.2.4 Test after installation . 62
126 8.107.3 Excessive vibration or resonance points of the REFRIGERATING SYSTEM and
127 vibration test . 62
128 8.108 Requirements for REFRIGERATING SYSTEMS employing secondary heat
129 exchangers . 62
130 9. Protection against the spread of fire . 64
131 9.2 Eliminating or reducing the sources of ignition within the equipment . 64
132 9.2.101 Possible ignition sources . 64
133 9.2.102 Arcs and sparks from electric components . 64
134 9.2.103 Surface temperature limits exposed to leaked FLAMMABLE REFRIGERANT . 66
135 9.5 Requirements for equipment containing or using FLAMMABLE LIQUIDS . 67
136 9.5.101 Additional requirements for equipment containing FLAMMABLE REFRIGERANT. 68
137 9.5.101.1 General . 68
138 9.5.101.2 Inaccessible REFRIGERATING SYSTEM . 69
139 9.5.101.3 ACCESSIBLE REFRIGERATING SYSTEMS . 69
140 9.5.101.4 Determining the gas concentration beyond the boundary of the equipment . 70
141 9.5.102 Internal fluid leaks . 70
142 9.5.103 Sources and grade of release . 71
143 9.5.103.1 General . 71
144 9.5.103.2 Sources giving a continuous grade of release . 71
145 9.5.103.3 Sources with NORMAL TIGHTNESS and giving a primary grade of release . 71
146 9.5.103.5 Factors to be considered in assessment for sources and grade of release . 72
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147 9.5.104 Location for sensor of LEAK DETECTION SYSTEM . 72
148 10. Equipment temperature limits and resistance to heat . 73
149 10.1 Surface temperature limits for protection against burns and frostbite . 73
150 10.2 Temperatures of windings . 73
151 10.4 Conduct of temperature tests . 75
152 10.4.1 General . 75
153 10.101 Overtemperature protection . 76
154 10.102 Restarting after interruption of cooling and/or heating . 77
155 11. Protection against HAZARDS from fluids and solid foreign objects . 77
156 11.1 General . 77
157 11.3 Spillage . 77
158 11.4 Overflow . 78
159 11.4 Overflow and low level . 78
160 11.4.101 Salt mist, thawing, condensate and spray . 80
161 11.4.102 HAZARDS from liquids in relation to the SPECIMEN and APPLICATION SYSTEM . 80
162 11.4.103 HAZARDS from liquids in relation to the SHAKER . 80
163 11.4.104 Construction requirements related to manual filling or draining . 80
164 11.7.1 Maximum pressure . 81
165 11.7.1.101 Determining the MAXIMUM ALLOWABLE PRESSURE (PS) in a REFRIGERATING
166 SYSTEM . 81
167 11.7.1.101.1 Determining the PS by calculation . 82
168 11.7.1.101.2 Determining the PS by test . 82
169 11.7.2 Leakage and rupture at high pressure. 83
170 11.7.2.101 Leakage and rupture of REFRIGERATING SYSTEMS . 83
171 11.7.2.101.1 General . 83
172 11.7.2.101.2 Pressure test . 84
173 11.7.2.101.3 Fatigue test . 84
174 11.7.2.101.4 Tightness of equipment . 85
175 11.7.2.102 Additional requirements for EQUIPMENT TYPE E . 85
176 11.7.2.102.1 Requirements for EQUIPMENT TYPE E in a subcritical application . 85
177 11.7.2.102.2 Requirements for EQUIPMENT TYPE E in a transcritical application . 85
178 11.7.2.103 Pressure test for storage and transport . 86
179 11.7.2.103.1 General . 86
180 11.7.2.103.2 Test of charge-to-volume ratio . 86
181 11.7.2.103.3 Test by pressure under the SOAKED TEMPERATURE CONDITION . 87
182 11.7.2.103.4 Calculation by using the ideal gas law . 87
183 11.7.2.103.5 Test in a TEST CHAMBER . 87
184 11.7.3 Leakage from low-pressure parts . 87
185 11.7.4 Overpressure safety device . 87
186 11.7.4.101 PRESSURE-LIMITING DEVICE and discharge capacity for a PRESSURE-RELIEF
187 DEVICE in EQUIPMENT TYPE E . 88
188 12. Protection against radiation, including laser sources, and against sonic and
189 ultrasonic pressure . 88
190 12.1 General . 88
191 12.2.1.3 Equipment not intended to emit radiation . 88
192 12.3 Optical radiation . 88
193 12.3.101 Construction requirements for UV-C radiation . 89
194 12.3.102 UV-C irradiance test . 89
195 13. Protection against liberated gases and substances, explosion and implosion . 90
IEC CDV 61010-2-012 © IEC 2025
196 13.1 Poisonous and injurious gases and substances . 90
197 13.2.1 Components . 90
198 13.2.1 Components of the equipment and materials being treated . 90
199 13.2.101 Implosion of low air pressure equipment . 91
200 13.2.102 Explosion and implosion of lamps . 91
201 14. Components and subassemblies . 91
202 14.3 Overtemperature protection devices . 91
203 14.101 Components and subassemblies for REFRIGERATING SYSTEMS . 92
204 14.102 Materials for REFRIGERATING SYSTEMS . 92
205 14.102.1 Requirements for copper in REFRIGERANT CIRCUITS . 92
206 14.102.2 Requirements for stainless steel . 92
207 14.102.3 Minimum wall thickness for copper and steel tubes . 92
208 14.103 SAFETY SHUT-OFF VALVES for FLAMMABLE REFRIGERANTS for the purposes of
209 limiting the RELEASABLE CHARGE . 93
210 15. Protection by interlocks . 94
211 15.1 General . 94
212 15.101 Mechanism of door and/or lock for WALK-IN EQUIPMENT . 94
213 15.102 Interlock between the CIRCULATING PUMP, agitator and heating, cooling,
214 MECHANICAL MOVEMENT and/or operation of the APPLICATION SYSTEM . 95
215 15.103 Interlock between CIRCULATING FAN, door or lid and heating, cooling and/or
216 radiation, humidifying, dehumidification and MECHANICAL MOVEMENT . 95
217 15.104 Interlock between salt spray and cover of salt spray corrosion TEST CHAMBER . 96
218 16. HAZARDS resulting from application . 96
219 16.1 REASONABLY FORESEEABLE MISUSE . 96
220 16.101 Slip HAZARD. 96
221 17. RISK assessment . 97
222 Annexes . 98
223 Annex F (normative) ROUTINE TESTS . 99
224 F.101 ROUTINE TESTS for equipment incorporating a REFRIGERANT CIRCUIT . 99
225 Annex K (normative) Insulation requirements not covered by 6.7 . 100
226 K.1.3 Solid insulation for MAINS CIRCUITS . 100
227 K.1.3.1 General . 100
228 Annex L (informative) Index of defined terms . 101
229 Annex AA (informative) Useful symbols . 104
230 Annex BB (informative) Protection of people who are inside WALK-IN EQUIPMENT . 107
231 BB.1 General. 107
232 BB.2 Emergency switch or signal . 107
233 BB.3 WALK-IN EQUIPMENt with a controlled atmosphere . 107
234 Annex CC (informative) Safety requirements for components and piping . 108
235 CC.1 Overview . 108
236 CC.2 Component and subassembly requirements for switches and controls used in
237 REFRIGERATING SYSTEMS for North America . 111
238 Annex DD (informative) Equipment containing FLAMMABLE REFRIGERANTS – Information
239 and marking requirements . 114
240 DD.1 Marking, installation and operating instructions (SB6) . 114
241 DD.1.1 Marking . 114
242 DD.1.2 OPERATOR markings . 114
243 DD.1.3 Service markings . 114
IEC CDV 61010-2-012 © IEC 2025
244 DD.1.4 Disposal . 114
245 DD.1.5 Exposed tubing . 114
246 DD.1.6 Accessing the REFRIGERANT CIRCUIT . 114
247 DD.1.7 Symbol for warning of flammable materials . 115
248 DD.1.8 Equipment containing a remote CONDENSING UNIT . 115
249 DD.1.9 Refrigerating equipment intended for laboratory use . 115
250 DD.2 Installation and operating instructions . 115
251 DD.2.1 Handling and moving . 115
252 DD.2.2 Packaging markings . 115
253 DD.2.3 Replacement components and servicing . 115
254 DD.2.4 Installation instructions for equipment containing a remote CONDENSING UNIT . 115
255 Annex EE (normative) Non-sparking "n" electrical device . 117
256 11 Supplementary requirements for non-sparking luminaires . 117
257 19 Supplementary requirements for sealed devices producing arcs, sparks or hot
258 surfaces . 117
259 19.1 Non-metallic materials . 117
260 19.6 Type tests . 117
261 20 Supplementary requirements for restricted-breathing ENCLOSURES protecting
262 equipment producing arcs, sparks or hot surfaces . 117
263 Annex FF (normative) Test method for determining gas concentration beyond the
264 boundary of the equipment . 118
265 FF.1 Arrangement . 118
266 FF.2 Release conditions . 118
267 FF.3 Measurement . 121
268 Annex GG (informative) Classification of fluid group . 123
269 GG.1 General . 123
270 GG.2 HAZARD class pictograms . 123
271 GG.3 HAZARD statement code for fluids commonly used in the GROUP I EQUIPMENT . 123
272 GG.4 Meanings of the precautionary statement codes . 124
273 Annex HH (normative) Overload tests for refrigerating equipment incorporated with
274 MOTOR-COMPRESSORS. 126
275 HH.1 General . 126
276 HH.2 Preparation operation . 127
277 HH.2.1 General . 127
278 HH.2.2 Under OPERATING CONDITION of maximum COOLING CAPACITY . 127
279 HH.2.3 Under variable OPERATING CONDITIONS of the REFRIGERATING SYSTEM . 128
280 HH.3 Overload tests . 129
281 Annex II (informative) Transportation, marking and storage for equipment that
282 containing FLAMMABLE REFRIGERANTS . 131
283 II.1 General . 131
284 II.2 Transport of equipment containing FLAMMABLE REFRIGERANTS . 131
285 II.3 Marking of equipment using markings . 131
286 II.4 Disposal of equipment using FLAMMABLE REFRIGERANTS . 131
287 II.5 Storage of equipment . 131
288 II.6 Storage of packed (unsold) equipment . 131
289 Annex JJ (normative) Requirements for installation, service, maintenance and repair,
290 and decommissioning instructions of equipment using FLAMMABLE REFRIGERANTS . 132
291 JJ.1 General . 132
292 JJ.2 Symbols . 133
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293 JJ.3 Information in instructions . 133
294 JJ.3.1 General . 133
295 JJ.3.2 Unventilated areas . 135
296 JJ.3.3 Qualification of workers . 136
297 JJ.4 Information on servicing . 136
298 JJ.4.1 General . 136
299 JJ.4.2 Checks to the area . 136
300 JJ.4.3 Work procedure . 136
301 JJ.4.4 General work area . 136
302 JJ.4.5 Checking for presence of REFRIGERANT . 136
303 JJ.4.6 Presence of fire extinguisher . 137
304 JJ.4.7 No ignition sources . 137
305 JJ.4.8 Ventilated area . 137
306 JJ.4.9 Checks to the refrigerating equipment . 137
307 JJ.4.10 Checks to electrical devices . 137
308 JJ.5 Sealed electrical components . 138
309 JJ.6 Cabling . 138
310 JJ.7 Detection of FLAMMABLE REFRIGERANTS . 138
311 JJ.8 REFRIGERANT removal and circuit evacuation . 138
312 JJ.9 Charging procedures. 139
313 JJ.10 Decommissioning . 139
314 JJ.11 Labeling . 140
315 JJ.12 Recovery . 140
316 Annex KK (normative) Methods for determining RELEASABLE CHARGE . 141
317 KK.1 General. 141
318 KK.2 Determination of RELEASABLE CHARGE by a simulated leak option 1 . 141
319 KK.2.1 Test set-up . 141
320 KK.2.2 Test method . 142
321 KK.3 Determination of RELEASABLE CHARGE by a simulated leak option 2 . 142
322 KK.3.1 General . 142
323 KK.3.2 Test set-up . 143
324 KK.3.3 Test method . 143
325 KK.4 Determination of RELEASABLE CHARGE by calculation . 144
326 KK.4.1 General . 144
327 KK.4.2 REFRIGERANT release between detection and closing the SAFETY SHUT-OFF
328 VALVES . 144
329 KK.4.3 Determination of mr3 . 144
330 KK.4.3.1 General . 144
331 KK.4.3.2 Determine apparent density, ρpart,i, by measuring the pressure . 145
332 KK.4.3.3 Determine apparent density, ρ , by default values . 145
part,i
333 KK.4.3.4 Determine apparent density, ρpart,i, by measuring the recovered
334 REFRIGERANT amount from the unit or piping . 145
335 KK.5 Time before the leak is detected, tr1 . 146
336 KK.5.1 General . 146
337 KK.5.2 Determination of tr1 by default time . 146
338 KK.5.3 Determination of t based on effective room concentration . 146
r1
339 KK.6 Test conditions for RELEASABLE CHARGE LIMITED SYSTEMS . 147
340 Annex LL (normative) Leak simulation tests for FLAMMABLE REFRIGERANT . 148
341 LL.1 General .
...