Safety requirement
CN
⚫
Class I
refers to measurements taken on a circuit not directly connected to
the main power supply. For example, measurements made on circuits that
are not exported from a main power supply, especially from a protected
(internal) main power supply. In the latter case, the instantaneous stress will
change. Therefore, the user should understand the instantaneous capacity of
the instrument.
⚫
Class II
refers to measurements taken on a circuit directly connected to low-
voltage instruments. For example, measurements made on household
appliances, portable tools, and similar equipment.
⚫
Class III
refers to measurements taken on construction equipment. For
example, measurements made on switchboards, circuit breakers, circuits
(including cables, busbars, junction boxes, switches, sockets) in fixed
equipment, as well as equipment for industrial use and certain other
equipment (for example, fixed motors permanently connected to fixed
instruments).
⚫
Class IV
refers to measurements taken at the source of low-voltage
equipment. For example, measurements made on electricity meters, primary
overcurrent protection equipment, and pulse control units.
1.4
Ventilation Requirement
To ensure sufficient ventilation, when using the instrument in a workbench or
rack, please ensure that there is a gap of at least 10 centimeters on both sides,
above, and behind it.
Note:
Poor ventilation can cause an increase in instrument temperature, leading to
instrument damage. Good ventilation should be maintained during use, and
ventilation openings should be regularly checked.
1.5
Work Environment
Operating temperature and humidity range
0
℃
-40
℃
, below 80% RH (without condensation)
Storage temperature and humidity range
-10
℃
-50
℃
, below 80% RH (without condensation)
Accuracy assurance temperature and humidity range
23
°
C
±
5
°
C, below 80% RH (without condensation)
Warning:
