Hensel Certo 400 Monolight - Manual (Page 36)

Operating the device
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Operating the device
Activating and deactivating the device

Make sure the device is connected.
 To switch on the device, set the main switch (1) to the “I” position.
 To switch off the device, set the main switch (1) to the “0” position.
Triggering a test flash
To trigger a test flash, proceed as follows:
 Make sure the LED display next to the TEST button lights up green.
 Press the TEST button.
The device releases a flash.