VOLTCRAFT VC-590OLED Operating Instructions Manual page 47

Please observe the following symbols:
A triangle containing an exclamation mark indicates important information in these
operating instructions that must be observed without fail.
The triangle containing a lightning symbol warns against danger of electric shock or
impairment of the electrical safety of the device.
A lighting bolt symbol in a square indicates that the device may be used to conduct
measurements on non-insulated, dangerously live conductors and warns of associ-
ated hazards. Use personal protective equipment.
The arrow symbol alerts the user to the presence of important tips and notes on using
the device.
This device is CE compliant and fulfills all applicable European guidelines.
Protection class 2 (double or reinforced insulation, protective insulation)
CAT I Measuring category I for measurements on electrical and electronic devices not di-
rectly connected to the supply voltage (i.e. battery-operated devices, safety extra-low
voltage, signal and control voltage, etc.).
CAT II Measurement category II is applicable to measuring circuits of electrical and electronic
equipment that is directly supplied with the mains voltage via a power plug. This cat-
egory also covers all smaller categories (e.g. CAT I for measuring signal and control
voltages).
CAT III
Measuring category III for measurements in building installations (i.e. outlets or sub-
distribution). This category includes all lower categories (i.e. CAT II for measurements
on electrical devices). Measurement operation in CAT III is permissible only using test
leads with a maximum exposed contact length of 4 mm or test leads with protective
caps.
CAT IV Measuring category IV for measurements at the source of low-voltage installations
(i.e. main distribution boards, utility entry points, etc.) and outdoors (i.e. underground
cables, open lines, etc.). This category includes all lower categories. Measurement
operation in CAT IV is permissible only using test leads with a maximum exposed
contact length of 4 mm or test leads with protective caps.
Ground potential
47