Yokogawa GD40 Gas Density Detector - Manual (Page 45)

<3. Operation>
3-2
IM 11T3E1-01E
3.1.2 Supplying Power
First make sure that when the GD402 analyzer is turned on, no control instruments connected to
the analyzer will come into operation by the signals transmitted from the analyzer. Next, turn on
the external power switch to start the analyzer. At that point, make sure the internal power switch
is in the ON position if the converter is an explosion-protected model.
After power-on, the analyzer will begin to operate in the measurement mode.
[Major Items Shown in Measurement Mode]
l Measured Values
In the Message selection under the DISP mode, choose the item you want to show.
Item
No. of Digits and Position
of Decimal Point
Message
Physical density XX.XXXX KG/M3
Physical density X.XXXXX LB/FT3
Compensated density X.XXXX KG/M3
Compensated density X.XXXXX LB/FT3
Calorific value XXX.XXX MJ/M3
Calorific value X.XXXX KBTU
Specific gravity X.XXXX SP GR
Molecular weight XXX.XX MOL
Concentration XXX.X VOL%
l Types of Messages
• Measurement units
• Error number (shown if an error occurs)
• Alarm number (shown if an alarm occurs)
l HOLD and FAIL Indications (shown regardless of whether the analyzer is in the
measurement mode or not)
• HOLD appears when the analyzer is in a hold state.
• FAIL appears if an error occurs.