Bird Technologies 4412A - Manual (Page 30)

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Shipment
Should you need to return the power meter, use the original shipping package if
possible. If the original package is not available, use a heavy duty corrugated box
with shock-absorbing material around all sides of the unit to provide firm cush-
ion and to prevent movement in the container. The container should be properly
sealed.
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 mea-
suring 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. Con-
nect 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
5 1 Field strength meter Bird Model 43 equipped with
Bird Model 4030 relative field
strength element