Thermo Scientific TZ-32 Zonal Rotor
Cleaning of Rotor and Septa — 49
7. Troubleshooting
Symptom
Possible Cause
Corrective Action
Pressure is 1.0 kgf/cm² or higher
when density gradient solution is
injected.
1. The injection flow rate is too high.
2. The injection passage is blocked.
1. The appropriate flow rate is approx.
50 ml/min.
2. Disassemble and check. Blocking is
likely to occur in the seal assembly,
shaft and septa.
Bubbles enter the sample line.
1. The pressure rises.
2. The solution stops flowing.
1. If the pressure does not rise much,
it is possible to continue operation.
2. If the pressure is too high or the
sample stops flowing, remove
bubbles.
on loading and unloading” on page
39.
Pressure drops abruptly during
loading and unloading.
The sample injection line is bypassed.
Sample leakage and vibration of seal
assembly.
1. The installation condition of the
guard plate.
2. The condition of the seal assembly.
1. Level the guard plate.
Rattle the three supports.
Center the rotor and guard plate.
See “5. 2. Preparation” on page
23.
Adjust the height of rotor and case.
2. Check the surface of the contact
body for the Rulon seal for
scratches and wear.
Check the bonded portion of the
rear of the contact piece for
peeling.
Check the adapter inside for
scratches and wear.
Spins the bail bearing smooth?
Clean and grease the bail bearing.
Temperature of the rotor rises.
Poor degree of vacuum.
Precool the rotor body and sample to
separate at low temperatures.
4. 1. Setting of sample temperature
and rotor temperature” on page 39.
Table 12
Troubleshooting
