User Manual

20
5.3.2. VARIATION WITHIN THE RANGE OF USE
Quantities of inuence Range of inuence Quantity inuenced Inuence
Temperature -10 to + 60 °C
θ
± 0.13°C / 10°C
5.4. MEMORY
The size of the ash memory containing the records is:
-2MB for the C.A 1821 and the C.A 1823,
-4Mo for the C.A 1822.
These capacities are sufcient to record one million measurements. Each measurement is recorded with the date, the time, and
the unit. For the instrument with 2 channels, both measurements are recorded.
5.5. USB
Protocol: USB Mass Storage
Maximum transmission speed: 12 Mbit/s
Type B micro-USB connector
5.6. BLUETOOTH
Bluetooth 4.0 BLE
Range 10m typical and up to 30m in line of sight.
Output power: +0 to -23 dBm
Nominal sensitivity: -93 dBm
Maximum transfer rate: 10 kbits/s
Average consumption: 3.3 µA to 3.3 V.
5.7. POWER SUPPLY
The instrument is supplied by three 1.5V LR6 or AA alkaline batteries. It is possible to replace the batteries by rechargeable NiMH
batteries of the same size. But the rechargeable batteries, even when correctly charged, will not reach the voltage of the alkaline
batteries and the life indicated will be or .
The voltage range ensuring correct operation is from 3 to 4.5V for the alkaline batteries and 3.6V for the rechargeable batteries.
Below 3V, the instrument stops making measurements and displays BAt.
Battery life (with the Bluetooth connection deactivated) is:
C.A 1821 C.A 1822 C.A 1823
In stand-alone mode 1000 h 1000 h 800 h
In recording mode at rate of one measurement
every 15 minutes
> 3 years > 3 years > 3 years
The instrument can also be powered via a USB-micro USB cord, connected either to a PC or to a wall outlet via a mains adapter.
> 110 VAC
< 240 VAC
50 / 60 Hz
2,5 W