Instruction manual

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ATTENTION: READ ME FIRST!!!
Watlow F4 Temperature
Controller
Programming the Control Instrument
First of all, the Watlow Control Instrument is pre-programmed here at the factory and has tuning parameters
entered into it that have been arrived at by extensive testing. Everyone’s needs are different and the control parameters
chosen were decided on for a mixture of speed, to get the load up to temperature as fast as possible, and to minimize
overshoot of the setpoint. You may decide to tune the instrument to suit your needs more closely. This is a relatively
easy process, but it is strongly suggested that you read the accompanying book on your particular Watlow Controller
FIRST.
To enter a setpoint into the controller, look at the lower display of the instrument. You will notice that the Setpoint 1 is
the first parameter displayed. Use the right arrow to enter the setpoint. Use the up or down arrows to determine the
setpoint and right arrow again, after the setpoint is entered. The unit should begin heating. This is all that is required.
Entering a Ramp / Soak Profile
(If you ordered Programmable Option #1 with your unit.)
The instrument is shipped from our factory with a sample profile that is named PROCESS 1. It can be viewed
by going down the Main Page list in the lower display to the line that says Go to Profiles. Use the right arrow to go into
the group. The display will read Create Profile, Edit Profile, Delete Profile. Choose Edit Profile and use the right arrow
to step through the existing profile. PROCESS 1 is a simple 4 step profile for ramping the furnace up at 6:00 am to a
setpoint of 1800°F. Step 1 has a ramp time of 1 second, the lowest setting, to immediately change the setpoint. Step
2 is a 1 hour soak period to hold the load at the setpoint for a period of 1 hour. Step 3 is a 1 second ramp back down
to a setpoint of 50°F. Step 4 is the end segment. This tells the controller what to do at the end of the profile. In this
case, we have programmed it to hold at the final setpoint. We employ the feature called guaranteed soak, which
delays timing of steps until the process temperature is within a specified range of the setpoint.
There are other questions that have to be answered for each step when a profile is being created that tell it to
perform certain functions, or to observe certain parameters. Refer to the sample profile page on the next page of this
manual to see the standard settings for these steps in this furnace. It is also strongly suggested that you refer to the
chapter on page 4.1, entitled Profile Programming, of the Watlow manual supplied with this operating manual for
further details pertaining to creating profiles.
To run the profile, press the profile button in the lower left corner of the instrument. It will ask which profile you wish to
run. Select the profile, right arrow out of the group, and the profile will start. You can confirm this by referring to the
lower display. Line 3 reads out the current step, line 4 tells the time remaining for that step, and line 5 tells the actual
time in 24 clock readout. To stop a profile, press the profile button again and tell the instrument to terminate the profile.
Right arrow out of the group and the profile terminates. The Setpoint 1 reading will say OFF. Arrow down to the
Setpoint 1 line and right arrow into it, enter a setpoint again and right arrow out of the group and a new setpoint will be
entered.
Watlow Series 97 High Limit Instrument
The high limit instrument supplied with your furnace is set at the factory to it’s maximum range setting. This is
done to protect the heating elements in the furnace chamber. Should you wish to lower the setpoint of the high limit
instrument, please refer to the Watlow Series 97 manual supplied with this manual.