Maintenance
18
Calibration
This procedure provides a means for complete calibration of the Series 4410
Thruline Wattmeter Assembly. The calibration of the elements is not covered by
this procedure.
The sine wave generator must be able to produce a stable 1000Hz ±
100Hz symmetrical sine wave at various RMS output voltages between
0.05 and 1.6 volts RMS into an impedance of approximately 600 ohms
resistive. Its output level adjustment must be such that these various
specific output levels can be conveniently adjusted to within ±0.3% of
their stated value. Total harmonic distortion must be less than 0.2%.
The digital multimeter must have an ac voltmeter range capable of
measuring the RMS voltage amplitude of the sine wave within ± 0.1%,
with a resolution of at least 3½ significant digits.
The Bird Plug-In Calibration Element requires no adjustment.However,
care should be taken to avoid damage to the unit from rough handling
or exposure to voltages greater than those specified.
The field strength meter should be set on its maximum sensitivity. 5.
Connect the sine wave generator and voltmeter to a BNC adapter tee
as shown in figure 9 with 50 ohm coaxial cables, such as RG-58-U, no
more than three feet (approx. 1 meter) long.
Equipment Required
Item Qty Description Recommendation
1 1 Standard digital multimeter Fluke Model 87
2 1 Plug-In calibration element Bird Model 4410-070
3 1 BNC test leads/adapters As Required
4 1 Sine wave generator Hewlett Packard Model 329A
To Next Page
Loading...
Need help?
General
