Trumen LSVR Series - Operation Matrix - LSVR-UD (EIUD; ERUD)

Vibrating rod is a single element tuned mechanical element type level sensing device.
Failsafe defines that the alarm and power failure / device failure conditions are same to
the external system. Failsafe operation is best understood with the type of installation
and following matrix.
Off
Off
On
On
Failsafe
Setting
Material &
Installation
Status
LED
Power ON
1 2 3 4
ON
min failsafe
1 2 3 4
ON
min failsafe
4 5 6 7 8 9
Material
Status
No material
at high level.
DPDT Relay Contacts
Power OFF
Switch no. 4
is off, failsafe
high/maximum.
Indicating
normal or
healthy
status.
4 5 6 7 8 9
Relay ON
normal or healthy
contacts.
Relay OFF
alarm contacts.
(due to power
failure)
No material
at low level.
Switch no. 4
is on, failsafe
low/minimum.
Indicating
alarm
status.
4 5 6 7 8 9
Relay OFF
alarm contacts.
4 5 6 7 8 9
1 2 3 4
ON
min failsafe
Indicating
alarm
status.
4 5 6 7 8 9
Relay OFF
alarm contacts.
4 5 6 7 8 9
Relay OFF
alarm contacts.
(as it is)
Material is
above the low
level or rod is
covered with
material
1 2 3 4
ON
min failsafe
Switch no. 4
is on, failsafe
low/minimum.
4 5 6 7 8 9
4 5 6 7 8 9
Material is
above the high
level or rod is
covered with
material.
Indicating
normal or
healthy
status.
Relay ON
normal or healthy
contacts.
High level / overflow detectionLow level / underflow detection
lsvr-manual-annexure-1 www.trumen.in
Annexure-1
Operation Matrix - LSVR-UD (EIUD / ERUD)
Page 2
Switch no. 4
is off, failsafe
high/maximum.
Relay OFF
alarm contacts.
(as it is)
Relay OFF
alarm contacts.
(due to power
failure)