1-4 Instrument Care and Preventive Maintenance General Information
1-4 PN: 10580-00252 Rev. K Site Master User Guide
1-4 Instrument Care and Preventive Maintenance
Instrument care and preventive maintenance consist of cleaning the unit and inspecting and
cleaning the RF connectors and all accessories. Clean the instrument with a soft, lint-free
cloth dampened with water or water and a mild cleaning solution.
Connector Care
Clean the RF connectors and center pins with a cotton swab dampened with denatured
alcohol. Visually inspect the connectors. The fingers of the N(f) connectors and the pins of the
N(m) connectors should be unbroken and uniform in appearance. If you are unsure whether
the connectors are undamaged, gauge the connectors to confirm that the dimensions are
correct. Visually inspect the test port cable(s). The test port cable should be uniform in
appearance, and not stretched, kinked, dented, or broken.
To prevent damage to your instrument, do not use pliers or a plain wrench to tighten the
Type-N connectors. The recommended torque is 12 lbf·in to 15 lbf·in (1.36 N·m to 1.70 N·m).
Inadequate torque settings can affect measurement accuracy. Over-tightening connectors can
damage the cable, the connector, the instrument, or all of these items.
Visually inspect connectors for general wear, cleanliness, and for damage such as bent pins or
connector rings. Repair or replace damaged connectors immediately. Dirty connectors can
limit the accuracy of your measurements. Damaged connectors can harm the instrument.
Connection of cables carrying an electrostatic potential, excess power, or excess voltage can
damage the connector, the instrument, or both.
Connecting Procedure
1. Carefully align the connectors. The male connector center pin must slip concentrically
into the contact fingers of the female connector.
2. Push connectors straight together. Do not twist or screw them together. A slight
resistance can usually be felt as the center conductors mate.
3. To tighten, turn the connector nut, not the connector body. Major damage can occur to
the center conductor and to the outer conductor if the connector body is twisted.
4. If you use a torque wrench, initially tighten by hand so that approximately 1/8 turn or
45 degrees of rotation remains for the final tightening with the torque wrench.
Relieve any side pressure on the connection (such as from long or heavy cables) in order
to assure consistent torque. Use an open-end wrench to keep the connector body from
turning while tightening with the torque wrench.
Do not over-torque the connector.
Disconnecting Procedure
1. If a wrench is needed, use an open-end wrench to keep the connector body from turning
while loosening with a second wrench.
2. Complete the disconnection by hand, turning only the connector nut.
3. Pull the connectors straight apart without twisting or bending.
Caution To avoid damaging the display or case, do not use solvents or abrasive cleaners.
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