Toshiba LF620 B Series Instruction Manual page 144

● High/low alarm, high-high/low-low alarm, empty pipe alarm
One of the following messages appears if the flow rate reading goes out of the set range or an
empty alarm is generated.
If the high or low limit alarm ON/OFF status is set to OFF, its alarm function (high or low) is
disabled. See 8.2, "Check/Change of Parameters."
LCD display
HIGH ALARM
HIGH HIGH
ALARM
LOW ALARM
LOW LOW
ALARM
EMPTY
ALARM
OVER 125%
UNDER -125%
Description
If high alarm is set, the flow rate reading has
exceeded the set value.
If high-high alarm is set, the flow rate reading
has exceeded the set value.
If low alarm is set, the flow rate reading is
below the set value.
If low-low alarm is set, the flow rate reading is
below the set value.
Indicates that the detector pipe is empty.
The measured value is over 125%.
The measure value is below −125%.
－ 143 －
6 F 8 A 0 9 9 7
Corrective action
Take necessary actions for the
system.
Fill the pipe with fluid.
The setting range for the
measurement value is too
narrow or the volume of fluid is
too large. Check whether the
setting is correct or if there is
any problem in the process
signal.