Step Nine
WIRING - INTRINSIC SAFETY
Models LP10-___0 Only
The LP10-___0 level switch has been approved for use in Class I,
Groups A, B, C & D; UNDER CERTIFICATE NUMBER LR 79326-4.
DO NOT USE THE LP10-___2, LP10-___3 OR LP10-___5 IN IN-
TRINSICALLY SAFE APPLICATIONS. The Entity parameter for the
LP10-___0 are:
V
max
= 32 VDC
I
max
= 0.5 A
C
i
= 0
µ
F
L
i
= 0 mH
Intrinsically Safe Control Drawing
Red Wire
Black Wire
Shield
HAZARDOUS LOCATION
Class I, Groups A,B, C, and D
Class II, Groups E, F, and G
Class III, (see note 1)
NON-HAZARDOUS LOCATION
LP50 series sensor suitable for Class I, Groups A, B, C, and
D locations only.
CSA certified associated equipment with entity parameters.
V
max
≥
V
oc
, I
max
≥
I
sc
, C
i
+ C
cable
≤
C
a
, L
i
+ L
cable
≤
L
a
.
Installation should be in accordance with CEC Part I, or
NFPA 70.
Associated equipment must be installed per manufacturers
instructions
Sensor Drawing: LSD1
Rev. A 7-21-95
Sensor Models
LP10
LP50
LU10
LO10
Entity Parameters
V
max
= 32V
I
max
= 0.5A
C
i
≈
0
L
i
≈
0
Associated
Equipement
(see notes 2 and 5)
Notes:
1.
2.
3.
4.
5.
Wiring to a Flowline Controller
LC90 Series Controller
4 or 20 mA Signal Output
Step Eight
+
R E L A Y 1
R E L A Y 2
P O W E R
I N V E R T
I N V E R T D E L A Y
-
-
+
-
-
D E L A Y
ONOFF
L A T C H
I N P U T 1
I N P U T 2 A
I N P U T 2 B
Black
Red
Non-Hazardous Area
Hazardous Area
General:
The LP10 series sensor itself requires no periodic maintenance except
cleaning as required. It is the responsibility of the user to determine the
appropriate maintenance schedule, based on the specific characteristics
of the application liquids.
Cleaning Procedure:
1. Power: Make Sure that all power to the sensor, controller and/or
power supply is completely disconnected.
2. Sensor Removal: In all through-wall installations, make sure that the
tank is drained well below the sensor prior to removal. Carefully,
remove the sensor from the installation.
3. Cleaning the Sensor: Use a soft bristle brush and mild detergent,
carefully wash the LP10 series sensor. Do not use harsh abrasives
such as steel wool or sandpaper, which might damage the surface
sensor. Do not use incompatible solvents which may damage the
sensor's Polypropylene or PFA plastic body.
4. Sensor Installation: Follow the appropriate steps of installation as
outlined in the installation section of this manual.
MAINTENANCE
