It depends...Depending on what kind of pulp (MOW-mixed office waste, ONP-old newsprint, OMG-old magazines, OCC-old corrugating containers, BC-bottle carrier, Ledger, Broke) and screen plate size (.004?/100microns, .006?/150microns) the Pulmac MasterScreen can screen between 25-100 grams.

Again it depends...Between 5 and 15 minutes.

The MasterScreen is designed to measure a small amount of virgin pulp to determine shive or debris content by weight. While the MasterScreen can screen larger amounts while limiting fiber build up in the slots of the screen plate. The unique features that supports the XLQ model of the MasterScreen are:

1. Metering valve between the feed tank and screening chamber to actively control screening chamber consistency.
2. Screening chamber pressure indication and control using manual control valve. (From 0-10 psi)
3. Specific XLQ program
4. Shower control valve

Although size requirement is somewhat dependent on customer preference, type of pulp, and how far back in process that representative samples are taken from, the following "rules of thumb" apply:

1. 0.003 in/75 microns = low freeness PGW and bleached hardwood
2. 0.004 in/100 microns = mechanical pulps, some chemical hardwoods
3. 0.006 in/150 microns = Bleached and unbleached softwoods, ONP, NSSC, and some MDF
4. 0.008 in/200 microns = OCC, some MDF, high yield kraft

Screening of 2-20 grams takes 5-8 minutes. Total test time, including sample preparation, screening and analysis can take as little as 20 minutes.

Screening of 100 grams of MOW, ONP, and OMG takes 8-12 minutes. Total test time, including sample preparation, screening, and analysis takes 20-30 minutes. (Laminator stickies test method using StickyScan100)

Screening of 25 grams of OCC takes 8-12 minutes. Total test time, including sample preparation, screening, and analysis takes 20-30 minutes. (RMD stickies test method using StickyScan100)

The Z-Span system provides the appropriate number and sized test sheets to do the Z-Span testing.

From receipt of the pulp, a tester can generate a set of Z-Span numbers in less than 1/2 hour.

80 sets of Z-span numbers per 24 hours.

The expected Coefficient of Variation among shift testers is 2.5%.

60 grams/m2 test strips that are 1" x 4" or 2.5cm x.10 cm.

The expected Coefficient of Variation among shift testers is 1.5%.

See Z-Span product information

60 grams/m2 test strips that are 2.5 in. x 4 in. (6cm x 10cm)

Five minutes from the time two appropriate, pre-weighed test strips have been placed onto the feedtray.

Assuming good control over the generation of standard test sheets, a Coefficient of Variation of 2.5% can be expected. However it is unlikely this Coefficient of Variation can be maintained on an around the clock basis.

60 grams/m2 test strips that are 1?x4? or 2.5cm x 10cm.

Add whatever time it takes to prepare the pulp suitably into three TAPPI, SCAN, etc. standard test sheets to weighing them. Then add a few minutes to cut ten plus 1 in x 4 in (2.5cm x 10cm) test strips from the standard test sheets. Now add about 5-10 minutes to rewet the test strips, perform the z-span tests, and write down the individual results. Finally add a few minutes for calculating the average and correcting to standard basis weight.

Assuming good control over the generation of standard test sheets, a Coefficient of Variation of 2.5% can be expected. However it is unlikely this Coefficient of Variation can be maintained on an around the clock basis.