What is the Agilent 11713B attenuator used for

CNC attenuator, switch plus fixed value attenuator.

Generally, there is no gap between the imported fiber melting machine and the OTDR measurement, but the domestic one is slightly worse, but it can pass the acceptance, mainly depending on whether the fiber melting machine is cladding alignment or fiber core alignment, and the fiber core alignment generally has little loss.

- Adjustment and use of pallet balances.

Key mastery: understand the construction and measurement principle of pallet balance, balance adjustment method before use, measurement method and correct reading.

a) Technical parameters of the pallet balance.

1 Inductance: Also known as the index value, it is the mass required for the balance pointer to deflect a minimum index on the scale. The smaller the sensitivity, the more sensitive the balance.

2. Full weighing: the maximum mass that the balance can weigh.

Note: The mass of the object to be weighed cannot exceed the full weight of the balance. The full weight of a tray balance for students in the laboratory is 200g. There is no requirement to read according to a pointer ruler, and the reading of the code can only be estimated to the gram.

b) Adjustment and use of pallet balances.

1. When in use, the tray balance should be placed on a horizontal tabletop. 2. Return the code to zero (placed at the far left end of the scale).

3. Adjust the balance of the beam (adjust the balance nuts at both ends of the beam, so that the pointer points to the dial**).

4. When measuring, the left object should be right, (use tweezers to take and place the weight, and handle it gently).

5. When the weight indexing is not fine enough, the movable yard can be moved to balance the balance.

6. The final reading should be m = m1 (total weight mass) + m2 (vernier reading).

Note: If the left code is placed on the right side, the final reading should be m = m1 (total weight mass) - m2 (free code reading).

According to my understanding of wire cutting accessories and consumables, Fanuc's hand-held box can be used for debugging.

The troubleshooting method of the spring testing machine is as follows:

1. The switch has no display Check whether the 220V power supply and the power supply of the microcomputer system are normal? If the fuse is broken, it should be replaced;

2. If the power plug is not in good contact, it should also be replaced;

3. If the power transformer has no output, replace the transformer or rewind the transformer;

4. If the voltage stabilizing circuit is abnormal, check the corresponding bridge diode, filter capacitor and the corresponding connection line, replace the damaged one, and re-weld the false or open circuit.

5. Check whether the voltage of the digital circuit is +5V? If not, the connection between the regulated power supply and the digital is soldered or open, and it should be re-soldered;

6. Check whether there is a short circuit point in the 5V load circuit? If so, it is removed, cleaned and dried, or the components are replaced.

7. Check whether the voltage of the digital tube is normal? Check if the sensor is OK? If all of the above is normal, the op amp is damaged and should be replaced.

If the 220V voltage of the power supply is unstable, a regulated power supply is required. If the output voltage of the amplifier is unstable, replace the amplifier.

8. Check the CPU frequency (and whether the comparison voltage is stable or drifting?) If there is a problem of virtual welding, it should be re-welded; If the performance of the components deteriorates, they should be replaced, check whether the circuit board is damp or oily, clean and dry as necessary.

It depends on whether your instrument has a qualitative scanning function, if not, it will not be possible to achieve full-wavelength scanning.

Some instruments can also achieve full wavelength scanning by purchasing a matching instrument.

Temperature range Room temperature 55 Temperature uniformity 2 Temperature fluctuation Salt spray sedimentation 1 2ml 80cm2 · h Spray method Continuous, periodic optional (specified at the time of ordering) Test timing 1 999 (s, m, h) adjustable Neutral salt spray test (NSS test) a, covering layer, a salt solution is prepared with sodium chloride (chemically pure, analytically pure) and distilled water or deionized water, and its concentration is (5% mass percentage). The atomized collection liquid shall not be reused except for the part that the baffle blocks back;

b.The pH of the salt solution before nebulization is between. When preparing the salt solution, the pH value can be adjusted by using a chemically pure solution of dilute hydrochloric acid or sodium hydroxide, but the concentration must still meet the requirements of point A.

Copper-accelerated acetate spray test (CASS test) bMetal cladding, aDissolve sodium chloride in distilled or deionized water at a concentration of 50 5 g l.

b.Copper oxide (Cuc12?) is added to solution A2H2O) at a concentration of i.e. g l anhydrous copper chloride).

Sodium hydroxide adjustment. c.Add an appropriate amount of glacial acetic acid to solution A to ensure that the pH value of the salt spray collection solution in the test chamber is as good as the pH value of the solution before spraying, the pH value of the collected solution is generally within the range.

The pH value of the solution can be measured with an acidity meter, and a precise pH test strip that has been calibrated by an acidity meter to read the change in value can also be used as a daily test. The pH of the solution can be used as glacial acetic acid or.

d.To avoid clogging of the nozzle, the solution must be filtered before use.