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Limit test
Limit taupe:
Low High?
Limit point?
24.5 [(ENDLINE]
Hot tom
BEEF
Rot ions
CLOSE ACTCBIT
ENDLINE
HH
(ENDLINE
Limit test 4 OYosHIY
Limit taupe:
Low High?
=2.3
[ENDLINE
Hot ior
EEEF
MMM
The SETUP Program
Now you can set the control (actuator) limits.
To set a lower limit, press [L].
Set the lower limit to 24. 5°C. The program will compare
each reading with this limit.
The limit action menu appears. Use the
key to select
Clo=E ACT-EIT asthe action.
Select channel 0 as the actuator channel. Whenever the
temperature of the bath drops below 24.5°C, the HP-71
will close actuator channel O on the HP 3421A, which
actuates the heater relay.
Now you can set the upper control limit.
To set an upper limit, press [H].
Set the upper limit to 25. 5°C.
The limit action menu appears. Use the
key to select
COFEH ACT-EIT asthe action.
9-25
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