HARRICK ATC-024-2 - Page 9

SINGLE LOOP CONTROL
6 of 17
SETTING THE CONTROL
TYPE
•
Simultaneously press both the Up-arrow S and
the Down-arrow T keys for approximately 3
seconds until the Input Menu prompt InPt appears
in the upper display and the Setup Menu prompt
SEt appears in the lower display:
InPt / SEt
• Press the Up-arrow S key twice. 9LbL appears
in the upper display:
9LbL/ SEt
• Press the MODE key four times. Cntl will appear
in the lower display.
• Press the Up-arrow S key until nor appears in the
upper display.
• Press the DSPY key to return to the main display
format.
SETTING THE UNITS
Make sure that this step is performed prior to setting the
low or high temperature limits.
• Simultaneously press both the Up-arrow S and
the Down-arrow T keys for approximately 3
seconds until the Input Menu prompt InPt appears
in the upper display and the Setup Menu prompt
SEt appears in the lower display:
InPt / SEt
• Press the Up-arrow S key twice. 9LbL appears
in the upper display:
9LbL/ SEt
• Press the MODE key once. C_F will appear in the
lower display.
• Either F for Fahrenheit units or C for Centigrade
units appears in the upper display.
• If the incorrect units are shown, press the Up-
arrow S once to change to the temperature units.
• Press the DSPY key to return to the main display
format.
SETTING THE LOW
TEMPERATURE LIMIT
For routine operation, the low temperature limit for
thermocouple 1 (TC1) should be set to -200ºC, as follows:
• Make sure that the units have been set to
Centigrade, as described above.
• Simultaneously press both the Up-arrow S and
the Down-arrow T keys for approximately 3
seconds until the Input Menu prompt InPt appears
in the upper display and the Setup Menu prompt
SEt appears in the lower display:
InPt / SEt
• Press the MODE key twice. rL1 will appear in the
lower display.
• Use the Down-arrow T key to set the upper
display to -200.
• Press the DSPY key to return to the main display
format
.