Omega BB700 Series, Руководство пользователя, Страница: 14 / 26

setpoint variable is the desired temperature the user has set. Setpoint
temperature can be changed by depressing the “ ” and “ ” keys. Holding
either of these keys for an extended period will cause the setpoint temperature to
advance more quickly to a desired value. Three scanning speeds are provided:
slow, medium and fast. The minimum and maximum setpoints are locked at 0
and 1046°C (32 and 1915°F), respectively. While these max. and min. settings
are changeable (see “Changing Controller Parameter Settings,” Section 3.4.2),
it is strongly advised not to adjust these parameters.
P.I.D. Control:
Proportional, integral, derivative control ( P.I.D.) is a temperature control algorithm used in high-end
temperature controllers. The controller causes the process to attain the desired temperature by turning
the process on or off. The process may be a heater or refrigerator. As the process temperature
approaches the setpoint temperature the hot or cold process will be pulsed to reduce the corrective
measures and minimize overshooting. The controller provides a visual representation of the process
status through LED indicators. An indicator may be lit continuously, blink or shut off entirely to indicate
that the process is on, being pulsed, or off, respectively.
3.4.2 Changing the Controller Parameter Settings
The BB705’s controller operates at its optimum performance when left with the
factory parameter settings. The only internal parameter that the operator may
need to change is the engineering units (°C or °F) or serial communications
parameters. If the parameter settings are accidentally altered or become lost,
the parameters should be re-programmed in according to the factory default
settings. Below are two diagrams: a) menu hierarchy with factory default
settings b) programming procedure.
Figure 6. Controller Default Parameters
Operations
3
3-6
NOTE:
Menu 00 Menu 01 Menu 02 Menu 03 Menu 04 Menu 05
Key Lock SETPOINT Ac.Cd = 02 Ac.Cd = 03 Ac.Cd = 04 Ac.Cd = 05
Ac.Cd
Gn.o1 193
Ŧ
ALr1 1925 id.no 01 SnSr S
Gr.o2 ALr2 bAUd 12.o.7 Sn.00
rAtE 29
Ŧ
Cy.t1 01 CAL.L dEC.P
rSEt 146
Ŧ
Cy.t2 CAL.H FILt
H.Hys SP.tt OFF OUt.1 Ht.P
HyS.1 L.SP.L 212 OUt.2 Alr
C.HyS L.SCL CoL.t nor
HyS.2 U.SP.L 1915 A1.HL HI
C.SPr H.SCL A1.Pd Pr
SPr.2 A1.OP LAt
dPnG NI A2.HL Hl
A2.Pd Pr
A2.OP OFF
Unit F
Ŧ
Suggested starting values shown above.
Actual values will be determined and
automatically updated by Autotune function.