ページを印刷するOperational Modes
The Dynasafe® Control System MK5 Fume cupboard controller has four primary operation
modes, "OFF", "PRE-PURGE", "RUNNING" and "POST-PURGE".
Off
The normal state for the fume cupboard is OFF when chemical handling is not taking place.
There are no electrical or gas services available to run ancillary equipment within the fume
cupboard.
Pre-purge
To commence a handling session press the "FAN" button. The fume cupboard will enter the "PRE-
PURGE" mode for 60 seconds. During this mode air flow is established and other equipment is
allowed to start and stabilise prior to commencement of handling procedures. At the end of this
period the fume cupboard status is checked to ensure all inputs are within normal operating ranges
prior to going to "RUNNING" mode. Only at this point are electrical and gas services within the fume
cupboard turned on.
Should an alarm situation arise it must be corrected before the cupboard will enter
"RUNNING" mode. (Panel Self Diagnostics)
Running
Once the "PRE-PURGE" cycle is complete, no alarms situations have presented themselves then the
fume cupboard will allow normal operation to begin. This is indicated by displaying "RUNNING" on
the controller display.
Should an alarm situation arise during "RUNNING" mode then the fume cupboard will turn
off services and sound the alarm and provide indication as to cause of the alarm. Once
the problem has been resolved then the fume cupboard will restart in "PRE-PURGE"
mode.
Post-purge
When the handling process is complete the fume cupboard needs to be shutdown. Press "FAN"
button to enter the "POST-PURGE" mode. In this mode the services are turned off, the FAN is kept
running for 20minutes before going to the "OFF" state.
Clock
Press the "Clock (LIGHT)" button to access clock settings and Timers options. This then allows the
user to set the time and date of the system.
Timers
The Dynaflow Mk5 Fume cupboard controller has the provision for a variety of process timers. Up to
4 start-stop sequences can be programmed in a 7 day period. Each process can be set to start or stop
on a particular day at a particular hour. DO NOT overlap timer sequences, but a single sequence can
run for more than 24 hours.
The Fume Cupboard will start the "PRE-PURGE" sequence at the nominated time for 60 seconds
then run until the stated stop time the fume cupboard will then enter "POST-PURGE" for 20 minutes.
At which point the fume cupboard will go to the "OFF" state. Until either manual start, remote start
or another timer event occurs.