Knauer Azura Assistant ASM 2.1L, Руководство пользователя

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ASM 2.1L user manual V6815
Troubleshooting 24
Baseline noise 1. Inspect the flow-cell assembly.
2. Fasten the knurled-head screws on the
flow cell to prevent incursion from inter-
fering light or an electronics error.
3. Exchange the defective flow cell.
4. Inspect the service life of the lamp.
The relationship of the
signal to the light path
reference is very low. 1. Flush the flow cell.
2. Clean the flow cell window.
3. Replace the lamps
Pump When purging, the pump
switches off Check if the bleed screw on the pressure
sensor is turned open.
Pump does not transport
solvent

Purge the pump head to remove the air
bubbles.

Inspect the eluent filter of the HPLC col-
umn and change when blocked

Clean checkl valves.

Exchange the check valves.

When the pump head seals are defec-
tive, solvent enters the piston backflush-
ing. Inform the Technical Support of
KNAUER.

Exchange the pump head.
Pressure and flow rate
variations

Pump without pressure sensor: Pay
attention to the influence of the pres-
sure on the flow rate (will not be com-
pensate).

Purge the pump head to remove the air
bubbles.

Always tighten the inlet screw fittings
and outlet screw fittings on the pump
head with a torque wrench and 7.5 Nm.

Clean the check valves.

Exchange the check valves.

Exchange the pump head.

Inform the Technical Support of
KNAUER.
Pump head leaks.

Inspect the inlet and outlet screw fittings
of the pump head.

When the pump head seals are defec-
tive, solvent enters the piston backflush-
ing. Inform the Technical Support of
KNAUER.

Exchange the pump head.
Valves Valve leaks Tighten the connections.
Pressure variations
caused by leaking valve
head Exchange the rotor seals.
Problem Solution