89
47DR OPERATING MANUAL EM-9509-B Rev.7
10.4 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 00.00 to 99.99. The default value is 00.01.
10.4.1 OPERATING PROCEDURE
NOTE
The following figures are display examples. The displays
depend on the settings.
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 ‘ALM PTN’.
NOTE
With the bank switching set to “enabled via the front button control”, the bank No. is indicated (‘ALM BNK’ on the SD).
2
Press Alarm/
↓
or Init/
↑
button to go to the LL (L, H or HH) dead-
band 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 00.00 to 99.99.
NOTE
Set to 2 decimal places regardless of the decimal point position setting.
1,2,
4
2,4
3
3
Blinking
Blinking
Blinking
