Ems Grounding, Shielding, And Noise Protection - Ametek Dycor CG1100 Series User Manual

EMS Grounding, Shielding, and Noise Protection

1-4 | Dycor CG1100 Oxygen Analyzer
Proper Sensor Operations
Follow these general guidelines when using the CG1100 analyzer:
•
Do not use pipe dope on any joints of the sample tubing, or any other
contaminant that gives off combustible vapor which can cause errone-
ous measurements.
•
Do not use calibration gases if they contain a mixture of oxygen and
combustibles.
•
Always introduce calibration gases at the recommended flow rate.
Also, be sure that calibration and sample gases are introduced into the
analyzer at the same flow rate.
When working on the plumbing inside the analyzer, disconnect the
power. The heater has exposed windings and a short to the plumbing will
blow the fuse and could damage the furnace or thermocouple.
• Do not handle the cell excessively. Do not try to clean the cell except
by rinsing.
• Do not remove a cell or type "K" thermocouple that you may want to
use again when the inside of the furnace is still hot - severe thermal
shock can be destructive to either of them.
• Do not pressurize the external flow meter when calibrating the inter-
nal flow sensor.
• Allow calibration gases to stabilize before proceeding to the next step
of a calibration.
• Do not overtighten compression fittings when servicing the analyzer.
For EMC purposes, under no circumstances should you leave shields
disconnected at one end or both ends of the control unit cable.
You must use twisted-pair cable in rigid metal conduit or use twisted-pair
cable with an overall braided shield. All cable shields or conduits connect-
ing to the control unit must be chassis-grounded.