Sample Dispense Slot General Information

Overview

The Sample Dispense Slot is the module where the MTUMulti-tube unit—Container used to process tests in the instrument. An MTU contains five separate reaction tubes. The MTU is moved through the instrument by the linear distributor and includes five tiplets for pipettiing to be used in the mag wash station. resides for sample side reagent (TCRTarget capture reagent—An assay-specific reagent added as part of specimen pipetting./TER) and sample addition.

Interfacing Modules

The Sample Pipettor dispenses TCR, TER (if applicable) and sample into MTUs located in the Sample Dispense Slot.

The Sample Pipettor performs cLLDCapacitive liquid level detection of the MTU in the Sample Dispense Slot before and after sample addition.

The Distributor inserts and removes MTUs from the Sample Dispense Slot.

Theory/Sequence of Operation

The Distributor inserts an MTU into the Sample Dispense Slot. The pipettor aspirates TCR and dispenses it into the MTU in the Sample Dispense Slot. The pipettor performs cLLD (sample preLLD in curve file). The pipettor aspirates sample and dispenses it into the MTU in the Sample Dispense Slot. The pipettor performs cLLD again to verify the correct amount of sample has been dispensed (Sample postLLD in curve file). If applicable, the pipettor aspirates TER and dispenses it into the MTU in the Sample Dispense Slot. The Distributor removes the MTU.

cLLD Operation

The plastic upper portion is designed to minimize change in capacitance as the pipettor enters the Sample Dispense Slot. The aluminum insert block serves to bridge the gap of the liquid and the ground plane. Without the aluminum insert block, the liquid cannot be detected accurately.