B&K 2250 Light Uživatelský manuál stáhnout pdf (Strana 114)

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Hand-held Analyzer Types 2250 and 2270 – User Manual

size of the device, how much it has been used, how fragmented the memory is, and even the day

of production of the device. Two ‘identical’ memory devices can have a different performance

because the manufacturer has changed the internal technology without notice.

In general, as a rule of thumb, you should select devices aimed for the industrial or

professional photographer market.

The cards delivered by Brüel & Kjær have all been tested for their read/write performance in the

analyzer and can be used for the applications available in the analyzer. If you need more (or other)

types of memory devices, please consult your local Brüel & Kjær representative.

Remember to regularly re-format the device (especially before a long unattended

measurement) – this will ensure the best performance of the device.

8) Select Test Speed, if you want to check the device’s file speed.

9.4.3 Battery Pack and Recalibration of Battery Charge Indicator

The software keeps the capacity of the battery pack updated. Over time the total capacity of the

battery pack decreases. If you find that the ‘Time Remaining’ estimate (tap the Battery icon

to get this information) does not match the real time remaining (for example, the

analyzer switches off automatically because of lack of power while the Time Remaining estimate

indicates at least ½ hour), then you should manually re-calibrate the capacity of the battery

pack. This is done using the following method:

• Drain all the power from the battery:

– Switch the analyzer on

– Disconnect external power

– Disconnect the analyzer from the PC

– On the Preferences screen, under Power Settings, set Standby After to Never

– You may want to set Backlight On to Always (in the same menu) and select the

maximum level of display backlight in order to drain the battery faster (use the

Backlight icon at the bottom of the screen)

– Leave the analyzer until the battery voltage becomes so low that the analyzer switches

itself off

• Charge the battery fully (at least 10 hours):

– Connect the Mains Power Supply ZG-0426 to the analyzer

– Switch the analyzer on (and leave it on) and remember to reset the Standby After and

Backlight On to your preferred settings

– Tap the Battery icon and a pop-up appears, giving details of the battery

condition. This will indicate ‘Calibrating Battery’ initially. Let the battery charge until

the battery charge indicator just below the power socket starts flashing green

(hardware versions 1–3) or changes from red to green (hardware version 4) and the

‘Calibrating Battery’ indication disappears from the pop-up window

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B&K 2250 Light Uživatelský manuál Strana 114