Deadband; Operating Procedure - M-system 47DAC Operating Manual

9.4 DEADBAND

Once a high (low) trip alarm is ON, the alarm stays ON until the data becomes lower (higher) than a certain range from the
setpoint, which prevents the alarm output from chattering when the display value fluctuates slightly near the setpoint. This
range is called deadband (hysteresis) and can be set within the range of 0000 to 9999. The default value is 0001.

9.4.1 OPERATING PROCEDURE

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1,2,
4
1
Hold down Alarm/↓ button for 3 seconds or more to move on
to Alarm Setting Mode.
• The alarm output pattern is indicated.
• The SD indicates ' A LM PTN' .
NOTE
With the bank switching set to "enabled via the front button control" , the bank No. is indicated (' A LM BNK' on the SD).
2
Press Alarm/↓ or Scale/↑ button to go to the LL (L, H or HH)
deadband setting.
• The LL (L, H or HH) deadband is indicated.
• The SD indicates 'HYST LL' ('HYST L' , 'HYST H' or 'HYST HH').
• 'LL' ('L' , 'H' or 'HH') indicator starts blinking.
3
Press Shift button to shift the display into the setting standby
mode. Then press Shift and Up buttons to set the LL (L, H or
HH) deadband.
• The forth digit starts blinking, to which you can apply changes.
• Set within the range of 0000 to 9999.
NOTE
Set the deadband for the setpoint. The decimal point is not indicated.
3
2,4 3
NOTE
The following figures are display examples. The displays
depend on the settings.
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47DAC OPERATING MANUAL EM-9518-B Rev.4
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103