PAC Alcor JFTOT II Manual page 36

After the temperature has stabilized at the specified
Setpoint:
a. the bypass valve(s) will CLOSE automatically,
b. the ∆P reading(s) will become visible.
After two minutes, the DP value(s) will automatically
tare to zero (0 mm Hg). A "(T)" will appear in the
lower right corner of the display when the ∆P values
have been tared.
Page 24
The JFTOT will record automatically the ∆P. If the
∆P exceeds 250mmHg the JFTOT will open the
appropriate bypass valve. When a bypass valve is
open, "bypass" is displayed in place of the ∆P
reading.
Heater Tube Temperature Profile, if specified, is
obtained in accordance with Appendix 3. This
procedure can only be followed after the heater has
been on for more than thirty minutes.
JFTOT II READY FOR TEST
JFTOT II Operation Manual Rev. C