EXPO MiniPurge D825/ET, Руководство пользователя, Страница: 37 / 40

1:1
TITLE
02
CHK'D
1
DR'WN
REV:
JPdB
from Expo Technologies Limited, neither are they to be used in any way against our interests.
TOLERANCES
MATERIAL
3rd ANGLE
DO NOT SCALE
Expo Technologies Limited
DRAWING STATUS:
Controlled
1
SURREY KT7 0RH
PSC
APP'D
MINIPURGE X LC SEQUENCE DIAGRAM
CUSTOMER:
BRD
and are returnable upon request. They are not to be copied or communicated in part or in whole without written consent
23/06/2010
FLATNESS TO BE LESS THAN 0.4mm OVER ANY 100mm LENGTH
UNSPECIFIED
PROJECTION
DIMENSIONS IN mm
UNITED KINGDOM
JOB No:
DRAWING No.
FINISH
SCALE
The contents of this drawing / document are Copyright © Expo Technologies Limited. They are to be treated as confidential
SHEET No.
O
F
2 DEC PLACE ±0.1
XBR-7TD0-040
NO DEC PLACE ±0.5
1 DEC PLACE ±0.2
DRAWN DATE:
Purge timer resets
Red = Pressure Low
Purge valve closes; Power Sw. signal ON
Is the PE pressure above the minimum?
Green = Pressure OK
Purge timer starts automatically
Red = Pressure Low
Purge Flow Sensor turns on
Purging Indicator turns Black as Yellow = Purge flow OK
Power on - Normal operation
Key to functions
Minimum Pressure sensor turns on
"Purge Complete" signal to electrical Power Switch
Automatic operation by the system
No
PRESSURIZED INDICATOR
Purge Outlet flow above the minimum?
"Pressurized" signal absent i.e. "Alarm" ON
Air enters the PE
"Purging" Indicator
"Pressurized" signal to remote alarm switch
Alarm and delayed trip
Leakage Compensation starts
Optional operation (User decision)
Pressurized Enclosure door closed
Action taken on pressure failure include:- Alarm and/or Trip
No
Black = Purge flow too low
Enclosure pressure falls below the minimum
Enclosure door opened, or excessive leakage
Relief Valve opens Purge flow starts
Purge flow falls below minimum
Manual operation by the user
Power turned off automatically without delay
Pressurizing air or inert gas turned off
Purge timer times out
Turn Pressurizing air or inert gas on
Minimum Pressure sensor turns off
Yes
Purge flow ceases; Relief Valve closes
PRESSURIZED INDICATOR
"Pressurized" signal absent i.e. "Alarm" ON
Yes
Outlet flow still above the minimum?
No
Yes
depends upon the user. Actions
PRESSURIZED INDICATOR
REV.
MOD NUMBER
APPROVED DATE
APPROVED
01
DRAWN
23/06/2010
JPdB
02
5434
20/12/2011
JPdB
THE RELEVANT EXPO CERTIFICATION DRAWING IS EP99-2-3