Instruction Manual

Sound Level Meter Types 2245 – Instruction Manual Page 66 of 110
Information on the signal source, frequency weighting and gain
Maximum Peak Output Voltage: ±4.46 V
Maximum Sinusoidal Output Voltage: 3.16 V
RMS
Output Impedance: 50 Ω
Load Impedance: >15 kΩ÷çç< 1 nF for <0.2 dB attenuation from DC to 20 kHz, short-
circuit proof without affecting the measurement results
Max DC Offset: ±15 mV
4.14.2 Digital Interfaces
The digital interfaces can be used for monitoring a measurement, setting up a
measurement, controlling a measurement, data storage, and transferring data from the
sound level meter to another device. However, it is not possible to change or corrup
the measured values in any way through these interfaces.
USB: ????
Ethernet: ????
4.14.3 Charge /power Interface
The instrument may be charged with USB-charger fitted with or combined with USB-C
cable. Instrument support Fast Charging with up to 3 A charge current.
Instrument will start up in operation mode when powered from charger. If turned off,
charge current will be limited to max 0.5 A. independent of charger.
4.15 Power Supply
4.15.1 External AC Main Supply Adapter
Part No.: Mains Power Supply ZG-0484
Supply Voltage: 100 – 120/200 – 240 V AC; 47 – 63 Hz
Max output current/voltage: 1.5 A / 5 V
Connector: USB-C
4.15.2 Battery
Build in rechargeable Li-Ion battery
Voltage: 3.7 V
Capacity: 5200 mAh nominal
Typical Operating Time: >18 hours. However, if the instrument is used in low
temperatures or there is extensive use of the display backlight, this may reduce the time
Battery Cycle Life: >500 complete charge/discharge cycles
Battery Indicator: Remaining battery capacity and expected working time may be read
out in % and in time
Battery Fuel Gauge: The battery is equipped with a built-in fuel gauge, which
continuously measures and stores the actual battery capacity in the battery unit