PTB 311E & PTB 511E – Manual 3-in-1 Tablet Testing Instrument
PTAG_29-02860_PTB311E_v2.2E.docx
Pharma Test offers the PT-MT magnetic tablets to calibrate the breakpoint detection of the whole
tablet hardness testing instrument (force sensor and mechanics of the instrument). All Pharma Test
tablet hardness testing instruments are fully compliant to the requirements of the current USP
Pharmacopeia.
The PTB 111E offers a built-in calibration and validation program for the hardness test station. To
validate the hardness test station the PT-MT magnetic tablet or different certified weights are used.
Use the PT-MT to qualify the correct breakpoint detection, the PT-MT instrument works like a tablet, it
withstands force and after “breaks”.
For the two point adjustment (zero and reference) of the load cell inside the hardness station a
certified reference weight of 10 kg is used. For validation purposes the use 5 up to 30kg certified
weights is recommended. All adjustment and calibration results can be printed and countersigned.
To prove the linearity of the instrument, the operator can program a print-out of the force curve
recorded during a test. This will show the linear increase of the adjusted force mode. Also different
weights, like the PTB-CAL15 and PTB-CAL30 weight sets which include 5, 10, 15kg and 30kg (PTB-
CAL30) using two additional 10kg weights for total 50kg, may be placed onto the load cell or the PT-
MT and can be used to validate the linearity. Using the parallel port a Matrix or PCL5 printer can be
added and using the RS232 COM port, all results can be transmitted to software running on a
computer system.
Figure 2: PTB-CAL15 - 5, 10, 15kg Weight Set
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