GE HumiLab, Руководство оператора

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Chapter 2 — Operation Page
19
In the manual position, you will never see the
“S”
ervice light dis-
played, telling you that the sensor mirror needs cleaning.
The upper ( INIT iate) momentary position manually triggers a Pacer
cycle.
F. SENSOR Switch. The SENSOR switch is typically kept in the center
OPER ate position.
This switch allows you to over-ride the automatic mirror control
loop, and force the mirror temperature up or down, causing it to
heat or cool. These are test positions used for sensor diagnostics.
G. TEMPERATURE Display. As shipped from the factory, this display
reads temperature in °C. It may be factory or field programmed to
read °F if desired. See Appendix B.
H. STATUS WINDOW (Temperature). This window provides the oper-
ator with programming status for the Temperature display when
programming Units or Outputs. See Appendix B.
I. SETPOINT Display. This display window shows the relative
humidity setpoint that has been programmed in the chamber.
J. SET (SETPOINT) Switch. This switch allows you to select a
humidity setpoint in the display window. Scroll to the desired value
by incrementing or decrementing, one decade at a time, until the
desired value is reached.
K. LOOP SELECT Switch. This selector is normally kept in the Closed
Loop position (up, toward the filled-in circle).
In the Closed Loop position the chilled mirror hygrometer controls
the chamber relative humidity. In the Open Loop position, you can
download humidity profiles from the Prostep software program,
and you can perform diagnostics if necessary (see Chapter 3).
L. CAL/AUTO Switch. This switch is typically kept in the center posi-
tion.
When this switch is pressed into the momentary CAL ibrate setting,
the system begins the automatic 9-hour recalibration cycle.