GW Instek GDM-398 - Manual (Page 45)

GDM-360/397/398/461 User Manual
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 Press PEAK to step the display through Peak Max and Peak Min readings.
 Press and hold PEAK for over 2 seconds to exit Peak mode, the LCD displays the
present measurement values.
 Don’t press the”PEAK” key if the meter has entered “CAL”mode.
Outputting Data (Except GDM-398)
 Press and hold the REL button for over 2 seconds to enter or exit RS232C or
USB mode.
 The sleep mode feature will be disabled after entering RS232C or USB mode, the
icon on the LCD will disappear (GDM-397/360/398* only). *Note: for the
GDM-398, entering the RS232C or USB mode has no function.
 If the Meter is carrying out HOLD, MAX/MIN or REL measurement, the LCD
will display the corresponding readings (Hold, Max, Min, REL) but the interface
output will output the actual measurement present on the input terminals.
 For GDM-461, Data Output mode is entered automatically.