PCE Instruments PCE-VM 40A, Руководство пользователя

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Manual
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5.24 External power supply
For measurements of very long duration, an external power supply is recommended. To operate the
PCE-VM 40 using an external power supply, connect the USB cable provided with the device
’s USB
socket.
To operate the device via USB power supply, you may use a standard USB power supply unit or
alternatively a “USB Power Bank”. If the PCE-VM 40 is connected via USB, the text “USB” appears on the
measurement screen in place of the battery symbol. The internal rechargeable battery then switches off
and the PCE-VM 40 receives its power via the USB connection.
Rechargeable NiMH batteries have a self-discharge rate of 0.5 to 1 % per day.
Note: The battery charger VM40-CH is not suitable for buffer operation of the PCE-VM 40 for battery
backup. Current from the charger only flows as long as the battery is being charged.
5.25 Reset
In rare cases, the PCE-VM 40 may not respond to any key operation. You can restart the firmware by
pressing the internal reset button. The location of the reset button is shown below.
Pressing the reset button does not affect data in the memory. Only time and date need to be readjusted.