In stal la tion. 9, Power and util ity re quire ments. 9, En vi ron men tal re quire ments. 9 – Bird Technologies 8890-400 Series Manuale d'uso

Pagina 19: Tools re quired. 9, Mount ing. 9, Cou pling kits. 9, Installation, Power and utility requirements, Environmental requirements, Tools required

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Chapter 3

Installation

Power and

Utility

Requirements

The Series 8890-400 Wattmeters are fully self-contained. No

additional equipment or outside power source is needed, un-

less the load is equipped with an optional BA-310 blower as-

sembly. If it is, either 115 V, 50/60 Hz or 230 V, 50/60 Hz ac

power is required.

Environmental

Requirements

Although Series 8890-400 Wattmeters are ruggedly built

and have no moving parts, a dust and vibration free dry en-

vironment is preferred. For the Wattmeter to function ac-

cording to its specifications it is important that:

1.

The ambient temperature remains within the

range of +10°C to +40°C (50°F to +104°F)

2. Access to air is not impeded. It is recommended

that a clear space of at least 12 inches (30 cm)

be allowed around the load.

Because the wattmeter absorbs and dissipates, as heat, all

of the RF power it receives, no harmful RF radiation is re-

leased into the environment.

Tools

Required

s

Screwdriver

s

Box wrenches — needed for changing connec-

tors, changing the coolant, etc.

s

Ohmmeter — For checking the resistor. An

ohmmeter with an accuracy of one percent or

better at 50 ohms is suggested. A simple volt-

ohm meter will suffice for checking the blower

assembly and thermoswitch.

Mounting

The Series 8890-400 Termaline Wattmeters are equipped

for either fixed installations or portable use. There are

mounting brackets on the front and rear faces of the unit.

The load may stand free or be attached to a bench, etc., by

means of four fasteners. Four 3/8 inch (9.53 mm) mounting

slots, to be used with appropriate screw sets up to 3/8 inch

diameter, are arranged in a 4-1/2 inch x 20-23/32 inch rec-

tangle (114.3 x 526.3 mm).

Coupling Kits

Models 8891-400A, 8891-415B, and 8891-420B: The RF con-

nector section has bolted flanges that are swivel type. It is

inserted into the existing transmission line using a coupling

kit, P/N 4600-020.

9

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