Agilent Technologies 85225F manual To enhance measurement accuracy

AEnhancing Measurement Accuracy

To enhance measurement accuracy

Follow these instructions to enhance the accuracy of your measurements.

To enhance measurement accuracy

Step	Action	Notes
1 Inspect device	a Prior to connecting the DUT, inspect the	• Before using connectors for a critical
connections for foreign	bias network and semi-rigid RF cable	measurement, inspect the connector
materials or connector	connectors for foreign materials or	interfaces with a microscope (~20X).
damage.	damage.	Look for dirt, contaminants, dented or
	b Replace any damaged connectors.	scratched outer conductor mating
		surfaces, and damaged center
		conductors.

2 Clean the connectors.	a Remove the systems power cord from the
	power supply or place the supply breaker in
	the tripped position.
	b Move the connectors to a well ventilated
	area.
	c Use a swab dipped in clean isopropyl
	alcohol to cleanse the outer conductor
	mating surfaces and the ends of the center
	conductors.
	d Blow off the remaining alcohol with clean
	compressed air.
	e Allow adequate time for the alcohol fumes
	to disperse before activating the system.

•Be careful not to let the alcohol get on the insulator bead, as this may damage the bead.

•Be careful not to exert too much force on the center conductors, as they may be damaged.

•Compressed air can reduce the temperature of connectors dramatically, and this can have a significant effect upon the performance of calibration and verification components.

•If the connector components being cleaned are to be used in a critical measurement application, allow the temperature of these components to stabilize prior to use.

3 Ensure proper system	a	Switch on line power to all of the system
warm-up time.		components.
	b	Allow at least 1 hour warm-up prior to
		making measurements.

•Follow the procedure in “To switch on power to the system" on page 87.

•Do not switch off line power to the system unless the system will not be used for an extended period of time.

4Ensure a proper and constant temperature in the measurement environment.

aOperate the system within an ambient temperature range of 25°C, ±5°C.

bAfter system measurement calibration,

hold the ambient temperature of the measurement environment to ±1°C of the ambient temperature at the time of calibration.

•Install heating and cooling systems as necessary to maintain proper ambient temperature in the measurement environment.

112 Installation and User’s Guide