Model 8670 SUREFLOW Room Pressure Controller Manual - TSI
Model 8670 SUREFLOW Room Pressure Controller Manual - TSI
Model 8670 SUREFLOW Room Pressure Controller Manual - TSI
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WARNING: The CONTROL OUTP function should not be used while experiments are<br />
being performed in the laboratory. A closed damper may create dangerously<br />
low air flows while an opened damper may create dangerously high air flows<br />
thus not maintaining a safe room pressure.<br />
ANALOG OUTP The ANALOG OUTP item is used to vary the analog output<br />
from the <strong>SUREFLOW</strong> unit. When this item is entered, a<br />
number will be shown on the display indicating the last<br />
analog output value. The value displayed ranges from 0 to<br />
255. The value 255 corresponds to the lowest voltage<br />
(current) output and 0 corresponds to the highest voltage<br />
(current) output. Pressing the ▲ arrow key will decrease<br />
the analog output and increase the value displayed. Pressing<br />
the ▼ arrow key will increase the analog output and decrease<br />
the value displayed.<br />
The ANALOG OUTP function can be used in conjunction<br />
with a volt meter to verify the analog output is correct.<br />
Escaping from this item is done only by pressing the MENU<br />
key. The analog output will return to the value<br />
corresponding to the measured room pressure when the<br />
MENU key is pressed.<br />
NO-FLO RELAY The NO-FLO RELAY item is used to change the state of the<br />
no-flow alarm relay. When this item is entered, the display<br />
will indicate either OPEN or CLOSED. The arrow keys are<br />
used to toggle the state of the relay. The ▲ arrow key is<br />
used to OPEN the alarm contact. The ▼ arrow key is used to<br />
CLOSE the alarm contact. When the contact is closed, the<br />
NO-FLO RELAY should be in an alarm condition.<br />
Escaping from this item is done only by pressing the MENU<br />
key. The <strong>SUREFLOW</strong> will return the NO-FLO RELAY to its<br />
state prior to entering this item when the MENU key is<br />
pressed.<br />
LOW RELAY The LOW RELAY item is used to change the state of the low<br />
alarm relay. When this item is entered, the display will<br />
indicate either OPEN or CLOSED. The arrow keys are used<br />
to toggle the state of the relay. The ▲ arrow key is used to<br />
OPEN the alarm contact. The ▼ arrow key is used to CLOSE<br />
the alarm contact. When the contact is closed, the LOW<br />
RELAY should be in an alarm condition.<br />
Escaping from this item is done only by pressing the MENU<br />
key. The <strong>SUREFLOW</strong> will return the LOW RELAY to its state<br />
prior to entering this item when the MENU key is pressed.<br />
40 Chapter 9
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