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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