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Safety Requirements
EN
Copyright Qingdao Hantek Electronics Co., LTD HTM200 user manual
3
1.3 Measurement Category
Measurement Category
The instrument can operate under measurement category Ⅰ.
Warning:
This instrument can only be used for measurements within its specified
measurement categories.
Definitions of measurement categories
Measurement Class I refers to measurements made on circuits not directly
connected to the main power supply. For example, circuits that are not derived
from the main power supply, especially from the protected (internal) main power
supply. In the latter case, instantaneous stress changes. Therefore, the user
should be aware of the instantaneous capacity of the device.
Measurement Class II refers to measurements made on circuits directly
connected to low voltage equipment. For example, household appliances, portable
tools and similar equipment.
Measurement Class III refers to measurement in construction equipment. For
example, switchboards, circuit breakers, circuits (including cables, busbars,
junction boxes, switches, sockets) in fixed equipment, equipment for industrial use,
and other equipment (for example, fixed motors permanently connected to fixed
equipment).
Measurement class IV refers to measurement at the source of low-voltage
equipment. For example, electricity meters, measurements on primary overcurrent
protection equipment, and measurements on pulse control units.
1.4 Working Environment
Temperature
Operating: 0℃ - 50 ℃
Non-operating: -20℃ - 60 ℃
Humidity
≤+104℉(≤+40°C): ≤90%RH
106℉~122℉ (+41°C ~50°C): ≤60%RH
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