Test outputs, Open loop, Tout] [oplp – Watlow Series 988LF User Manual
Page 44: Factory-diagnostics
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6.4
WATLOW Series 988LF Users Manual
Factory Menus, Chapter 6
Test Outputs
This prompt tests each output. To run the test, scroll through the
Diagnostics Menu until [tout] is shown in the lower display. Use the Up-
arrow key > or Down-arrow key < to select an output [out1] or
[out2]. The LED for that output should light after a second or two indicat-
ing that the output has been successfully energized. Do not press the
mode key µ to activate the test; it starts automatically when anything
other than [`OFF] is selected.
If any of the LEDs fail to light contact the factory.
[tout] This prompt always appears.
Default
↓
[`OFF]
[out1]
[out2]
[tout]
[tout]
[tout]
Open Loop
Checks the control loop, consisting of the controller output, power
control, heater and sensor. With open loop enabled, the controller moni-
tors the output power level and checks for a change in the process input
value. If the output power is at maximum for a period of time equal to the
reset time and the process input has not changed by at least ±5°F, the
controller will switch to manual mode at 0% output power and [OPLP] will
be displayed in the lower display.
To clear this error, enter the Setup Menu and press the display key ∂. To
get back into auto mode, press the Auto/Man key å.
[OPLP] This prompt always appears.
Default
↓
[`OFF]
[``On]
[OPLP]
[OPLP]
[tout]
[OPLP]
Factory-Diagnostics