90 1100 Series Nano Pump Service Manual
2 Troubleshooting and Test Functions
Correction factor • Step 1: Between 95 % and 105 %
• Step 5: Between 80 % and 500 %
• Step 2-4: Continuous trend between
Step 1 and Step 5.
• If value out of range check
the restriction capillary for
damage or blockage and
repeat the test.
• If value still out of range,
accept the “offset only” at
the end of the test
†
.
* If the flow sensor has a negative offset the minimum flow rate the pump can operate is the numeric value of the measured
offset. For example: If offset flow is 0.030 µL/min. the minimum flow rate the pump can operate is 30 nL/min.
† The offset of the nano flow sensor has a more significant influence on the flow sensor accuracy than the linearity.
Table 5 Flow sensor accuracy calibration test evaluation, continued