Instrument Status - Michell Instruments Optidew User Manual

Optidew Series User's Manual
3.4.3

Instrument Status

Instrument status is shown on the fi ve colored indicators.
Status Indicator
DCC
HOLD
Fault
MAXCOOL
Alarm
Clicking on the
measured parameters to be viewed. See Section 3.4.6.
Charting and logging of the measured values can be initiated by clicking on the
button. See Section 3.4.5.
log
The
Hold display in DCC mode
during DCC, when enabled. The display is held when a DCC is initiated and is not
updated until both DCC and HOLD periods have expired.
Michell Instruments
Description
In DCC (initiated automatically or by using the
button), both the DCC and HOLD indicators will illuminate
showing the DCC status and the hold on Channel 1 mA output.
When the DCC period ends, the DCC indicator will turn off
leaving only the HOLD indicator illuminated until the system
enters the measurement phase.
Refer to Section 3.3.3 for more details.
The Fault indicator will illuminate after a DCC if cleaning of the
mirror surface is required. This normally means the mirror needs
cleaning, followed by resetting the mirror condition during a
DCC cycle.
Refer to Section 3.4.2 for more details.
The MAXCOOL indicator will illuminate to indicate the MAXCOOL
function has been activated. The system will drive the heat
pump into maximum depression. This feature can be used to
ascertain if the measured dew point is within the measurement
capability of the instrument.
NOTE: It is necessary to manually deactivate the
MAXCOOL function.
Refer to Section 3.3.5 for more details.
The alarm indicator will illuminate when the measured variable
exceeds the alarm set point (if selected).
Refer to Section 2.3.3 and 3.3.4 for more details.
button allows maximum, minimum and average values of the
Statistics
check box stops the system from updating the display
OPERATION
DCC Initiate
Chart/
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