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JC Systems 620A Reference Manual page 35

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Manual Mode (single channel)
With the cursor flashing on the CH1 mode push the <SEL> button. The Mode will change to Manual and the
Dev field will appear.
When a channel is changed from Programmer to Manual mode, the decimal point in the
setpoint field is changed to the lower case letter "m," indicating the channel is in manual
mode and the setpoint is cleared killing the Inc/Dec outputs.
The "m" will be displayed on all screens and displays.
Setpoints in Manual Mode:
Use the arrow keys to position the cursor over the setpoint field or event fields. Enter the desired value and push
<ENTER>. The cursor will remain in the current field. Use the arrow keys to move the cursor to a new field.
Line 1: CH1 manual setpoint field, CH2 setpoint field (blank in this mode), Event status (1 – 8).
Events in Manual Mode.
The event outputs can be turned ON/OFF independently in the Manual Mode. Use the arrow keys to move the
cursor onto the Number (line 1) or Letter (Line 2) field. Pushing the corresponding number or letter key will
toggle the event output. Number or letter showing = event ON. Decimal in event field = event OFF.
Pushing the <CLR> button on either event field will turn all the events in that field OFF.
In Two channel mode both channels must be in Manual to manipulate the event outputs.
Line 1: CH1 setpoint field, CH2 setpoint (blank in this mode) Events 1 – 8 cleared.
NOTE:
Line 2: CH1 process value, CH2 process value and
Event status (A – H).
Line 3: CH1 Manual mode. CH1 Dev alarm value.
See definition of DEV alarm and operation.
Line 4: Blank in this mode. In two channel mode
Programmer or Manual (+/- DEV) mode displayed.
Line 2: CH1 process value, CH2 process value and
Event status (A – H) cl
Line 3: CH1 Manual mode. CH1 Dev alarm value.
See definition of DEV alarm and operation.
Line 4: Blank in this mode.
eared.

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