Dwyer DH3 - Manual (Page 17)

17
The following alarm function SUB MENUS are activated when CtrL is set to SPAL :
AL (Alarm Type) SUB MENU
HI - High alarm
LO - Low alarm
HILO - For a high/low guardband type alarm
ALARM ADJUSTMENT
Alarm settings are dependent upon the selected alarm mode. The DH3
® differential pres-
sure controller alarm may be configured as a High Alarm, Low Alarm, or High/Low Alarm.
Alarm settings are all absolute and may be set to anywhere within the range of the instru-
ment. The dead bands of the alarms are fixed at 1% of full scale.
MIN. PRESSURE MAX. PRESSURE
ALHI
Relay OFF Relay ON
HIGH ALARM FUNCTION
MIN. PRESSURE MAX. PRESSURE
ALLO
Relay ON Relay OFF
LOW ALARM FUNCTION
MIN. PRESSURE MAX. PRESSURE
ALLO
Relay ON Relay OFF Relay ON
HIGH/LOW ALARM
FUNCTION
ALHI