12
45-610 Displacer Type Liquid Level Switches and Proof-er
®
Switches
4.1.3 Proof-er
If the Proof-er is not functioning properly, listed below are
potential problems and corrective action.
1. Proof-er does not return to the down position after it is
activated.
CAUSE
REMEDY
Defective return spring.
Replace Spring.
Buildup between the shaft
Clean Proof-er to
and housing restricting
remove buildup.
movement.
Handle stops are not adjusted
Adjust handle stop
properly.
screws in or out to allow
the handle to move to
the proper position.
2. Switch will not trip when Proof-er is activated.
CAUSE
REMEDY
The switch mechanism is
Check switch
defective and not the Proof-er.
mechanism.
Handle stops are not adjusted
Adjust handle stop
properly.
screws in or out to allow
the handle to move to
the proper position.
4.2
Agency Approvals
AGENCy
APPrOvED MODEL
APPrOvAL CLASSES
FM
All with an electric switch mechanism and a housing
Class
I
, Div 1, Groups C & D
listed as Type 4X/7/9
Class
II
, Div 1, Groups E, F & G
All with an electric switch mechanism and a housing
Class
I
, Div 1, Groups B, C & D
listed as Type 4X/7/9 Class
I
, Div 1, Group B
Class
II
, Div 1, Groups E, F & G
CSA
All with a Series HS, F, 8 or 9 electric switch mechanism
Class
I
, Div 2, Groups A, B, C & D
and a housing listed as CSA Type 4X
All with an electric switch mechanism and a housing
Class
I
, Div 1, Groups C & D
listed as Type 4X/7/9
➀
Class
II
, Div 1, Groups E, F & G
All with an electric switch mechanism and a housing
Class
I
, Div 1, Groups B, C & D
listed as Type 4X/7/9 Class
I
, Div 1, Group B
Class
II
, Div 1, Groups E, F & G
ATEX /
All with an electric switch mechanism and an
ATEX
II
2 G EEx d
II
C T6
IEC Ex
➂
ATEX housing
➁
94/9/EC
IEC Ex Ex d
II
C T6
IP66
CE
Low Voltage Directives 2006/95/EC
Installation Category
II
Per Harmonized Standard:
Pollution Degree 2
EN 61010-1/1993 & Amendment No. 1