Auto PulpIVA

The PSL Rheotek RPV-1 AutoPulpIVA viscometer system fully automates the sample preparation and viscosity measurement for cellulose and paper pulp.

The AutoPulpIVA controls sensitive CED stirring times as wells as maintaining a nitrogen blanket over samples prior to measurment to avoid degradation.

AutoPulpIVA systems are configured with integrated moduls for sample preparation, sample agitation, nitrogen purge and auto sampling. Two samples are measured simultaneously.

Alternatively, a four position system is available with dual zones for handling samples. Flow times are measured automatically using ASTM Ubbelohde viscometer tubes supplied with ISO 17025 certificates of calibration.
Cleaning is carried out in-situ utilizing a safe vacuum system.

The comprehensive RPV-1 software program records all measurement data as well as calculating a wide range of results including relative viscosity, intrinsic viscosity (Limiting Viscosity Number), degree of polymerization (DP), K value, kinematic viscosity (mm²/s) and dynamic viscosity (mPa.s).

Summary of operation:
– Operator adds sample to vial, waits for instrument to add correct volume of water, then places vial on to auto sampler stirring block.
– Instrument automatically adds CED and analyzes sample for IV according to ASTM D1795 or ISO 5351

Accuracy:
Typically better than 1% coefficient of variation for all samples measured using the RPV system.

Speed:
4 to 6 samples per hour after initial 30 minute warm up time at start. During warm up time, samples are prepared and added to the auto sampler stirrer block. During continuous use, the warm up time is not required.