Aeroflex SmartStep 8310, Руководство по эксплуатации и установке

Страница: 83 / 85

A-4.2 HEX-NUT TYPES. To mate a connector of the
hex-nut type, always use a torque wrench set to the correct
torque value. Tighten the connector slowly until the wrench
snaps. Tightening too quickly can cause the wrench to exceed
its set limit. Do not snap the wrench more than once as this
also causes overtorque.
A-4.3 KNURLED NUTS. T ig h ten co nn ector s with
knurled nuts by hand. If this does not provide sufficient
tightness use a hex-nut connector and torque wrench instead.
Never use pliers to tighten a connector. Table A-1
recommends torque specifications for the various types of
connectors.
A-5 PROPER CABLE HANDLING.
Never exceed the minimum bend radius specified for a
cable. Guard against tight bends at the end of connector strain
relief tubing, or at the ends of marker tubing where they may
be less noticeable. Although cable bend may seem slight, the
actual radius of the bend at the point of angular departure may
be far smaller than the acceptable radius.
Never pinch, crush or drop objects on cable assemblies.
Also, do not drag a cable over sharp edges as this will pinch it
and cause it to exceed the minimum bend radius.
Never use a cable assembly to pull a piece of equipment.
Cables and connectors are not designed to support or move
equipment.
A-5.1 SECURING CABLES. Use toothed, rubber-lined
"P-clamps" to hold cables in place. If it is necessary to use
tie-wraps, use the widest possible wrap and the lowest setting
on the gun to ensure the minimum pressure on the cable.
A-5.2 STORING CABLES. W he n st or ing cab les,
minimize cable "set" by coiling them in large diameters (1 or
2 feet). Unroll the cable properly when it is ready to be used;
do not pull the loops out hastily. Similarly, re-roll them when
storing them away again.
A-6 CLEANING CONNECTOR INTERFACES.
Use the following guidelines in cleaning connector
interfaces:
a. Do not use chlorinated solvents including common tap
water. These solvents are extremely penetrating and
sometimes ruin otherwise good devices and assemblies.
b. Moisten a cotton swab with isopropyl alcohol. Roll
the swab on a paper towel to remove excess.
c. Use the moistened cotton swab to wipe away debris.
Do not try to dissolve the debris by overwetting the swab.
d. Repeat the cleaning process using additional swabs as
necessary. If metallic particles are embedded in the
dielectric, use an eyeglass and a sharp pick in an attempt
to dislodge them. Swab again.
e. When satisfied that the interfaces are clean, blow them
dry with dry compressed air, or preferably dry nitrogen
(pressurized spray cans work well). Do not use breath.
f. Clean the mating connectors. These may be the source
of the debris.
Connector Recommended
Torque
GPC-7 (7mm) w/hex nut 14 in/lbs
±
1 in/lbs
Type N w/hex nut 14 in/lbs
±
1 in/lbs
SMA, 2.92mm, 3.5mm 7.5 in/lbs
±
0.5 in/lbs
2.4mm, WPM, WPM-3
WPM-4
Type N & TNC (knurled) Hand-tight
BNC (knurled) Hand-tight
Table A-1. Recommended Torque Values
CARE & HANDLING OF COAXIAL CABLES
A-ii