89750147 Crouzet USA, 89750147 Datasheet - Page 107

• Manufacturer Part Number: 89750147
• Description: STAINLESS SLEEVE-MILL TEMP PRB
• Manufacturer: Crouzet USA

Specifications of 89750147

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

For more information www.crouzet.com
R
N
S
T
Principles
Operating principle
General principle :
The ENRM monitors the levels of conductive liquids. The principle is based on measuring the apparent resistance of the liquid between two submerged
probes. When this value is lower than the preset threshold displayed on the unit’s front panel, the relay changes state. To prevent any occurrences of
electrolysis, an AC current is passed through the probes. A rotary switch on the front panel can be used to select the desired function and sensitivity
range. A level can be monitored using the 2
In this instance, the max. probe remains above the liquid and an adjustable time delay prevents the wave effect.
A green LED indicates that the supply voltage is present.
A yellow LED indicates the output relay’s state.
When the green and yellow LEDs are flashing, this indicates an incompatible adjustment position.
Rotary switch in mode 2 - Activation time - Filling function
Rotary switch in mode 2 - Activation time - Emptying function
Connections
Adjusting two levels
Monitoring filling "Up"
B
C
B
C
B
C
D
E
A1-A2 : power supply
Level
Relay
Level
Relay
Common
Off
On
Output
1
2
1
2
M
U
U
P
T
T
2
3
A1 11
14
T
T
12
Min
12 A2
S
11
Max.
Max
T
T
14
C
Min.
T
1
T
nd
rotary switch.
4
Monitoring a level, filling function, activation time
5 kW to 100 kW) , Up HS (High Sensitivity : 50 kW to 1 MW).
When the level of liquid drops below the probe for a period exceeding the value of time delay T set
on the front panel, the relay energises and remains on until the level of liquid reaches the probe
again.
If the level of liquid returns above the level set before the time delay elapses, the relay does not
come on.
Note
When the power returns after a power break, the output relay only energises after time delay T if
the level of liquid is below the threshold.
Monitoring a level, emptying function, activation time
Sensitivity : 5 kW to 100 kW) , Dwn HS (High Sensitivity : 50 kW to 1 MW).
When the level of liquid rises above the probe for a period exceeding the value of time delay T set
on the front panel, the relay energises and remains on until the level of liquid drops back below the
probe.
If the level of liquid drops back below the level set before the time delay elapses the relay does not
come on.
Note
When the power returns after a power break, the output relay only energises after delay time T if
the level of liquid is above the threshold.
(level : 1 - on delay, function Up LS (Low Sensitivity : 250 W to 5 kW) , Up St (Standard Sensitivity :
(level : 1 - on delay, function Dwn LS (Low Sensitivity : 250 W to 5 kW) , Dwn St (Standard
R
S
T
N
Monitoring emptying "Down"
B
C
D
A1-A2 : power supply
Common
Off
Output
M
P
2
A1 11
14
12
12 A2
S
11
14
Max
Max.
C
1
3
107
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