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47LLC OPERATING MANUAL EM-9505-B Rev.4
11.4 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 0001 to 9999. The default value is 0010.
11.4.1 OPERATING PROCEDURE
NOTE
•
The following figures are display examples. The dis-
plays depend on the settings.
•
With “Dual alarm” selected for the alarm point param-
eter, the LL and HH deadbands are disabled.
1
Hold down Alarm/
↓
button for 3 seconds or more to move on
to Alarm Setting Mode.
•
The alarm point is indicated.
•
‘HH’, ‘H’, ‘L’, ‘LL’ and ‘Fnc’ indicators turn on.
NOTE
•
‘ALM2’ or ‘ALM4’ is indicated depending on the setting.
•
When “Dual alarm” is selected for the alarm point parameter, ‘HH’ and ‘LL’ indicators do not turn on.
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.
•
‘LL’ (‘L’, ‘H’ or ‘HH’) and ‘P’ indicators blink and ‘Fnc’ indicator turns
on.
NOTE
The LL (L, H or HH) deadband is indicated within the range of 0001 to 9999 depending on the setting.
1,2,
5
2,5
3,4
4
Blinking
Blinking
■
L deadband
■ HH
deadband
■
H deadband