© Sensortech Systems, Inc. 2014 Page 1 of 15
Rev.5-2014
Portable Moisture Tester
PMT-330 User Manual
Sensortech Systems, Inc.
2221 E. Celsius Ave. Unit B
Oxnard, CA 93030 805-981-3735 main
805-981-3738 fax
www.sensortech.com
Page 1: ...tech Systems Inc 2014 Page 1 of 15 Rev 5 2014 Portable Moisture Tester PMT 330 User Manual Sensortech Systems Inc 2221 E Celsius Ave Unit B Oxnard CA 93030 805 981 3735 main 805 981 3738 fax www sensortech com ...
Page 2: ... pressing the Sensor Electrode onto the product surface The Sensor Electrode contains a flexible electrode in the center that adjusts to the contour of the product surface and is made of hard anodized aluminum The PMT 330G is designed for gypsum and other board applications where the effective penetration depth is approx 3 4 inch 20mm The contact moisture measurement does not damage the product be...
Page 3: ...D key SEND to save a new Span value 6 Press FUNCTION until Zero is displayed The Zero value specifies the zero offset value The initial Zero value should be equal to 00 00 and can be changed by pressing the and keys Press SEND to save a new Zero value 7 Press FUNCTION until Diagnostics is displayed Press ENTER to select the Diagnostics menu then press FUNCTION repeatedly to cycle thru the diagnost...
Page 4: ...ence calibration The Left and Right keys control the cursor position in the display when setting Span and Zero Simultaneously pressing the and arrow keys turns the power off The Up and Down keys increment or decrement the digit highlighted by the cursor In Continuous Measurement mode the key toggles the Peak Measurement Mode on and the key returns the device back to Continuous Measurement mode Sim...
Page 5: ...pressed or the PMT 330 time out occurs power off The PMT 330 will re lock microprocessor memory when SEND is pressed from the Product Code screen This will also save the new product code parameters into microprocessor memory Product Codes The PMT 330 can store product calibrations for ten different product codes Each product code has its own associated Span and Zero To change product codes unlock ...
Page 6: ...order to display actual moisture the PMT 330 applies a linear function involving a slope multiplier Span and offset Zero This value should be approx 1 in free air and increase with increasing moisture near the Sensor Electrode Pre Zero The lower display shows the value that is computed when pressing ENTER while Moisture is displayed This is the value calculated during the Zero Reference Operation ...
Page 7: ...us Measurement mode Each push of the FUNCTION key advances to the next mode allowing Product Code selection Span and Zero entry The Set up and Diagnostics modes are for measurement configuration and calibration These modes contain multiple parameters which may be accessed by pressing ENTER Figure 3 illustrates how to step through the various modes using the FUNCTION key Press SEND to return from a...
Page 8: ... Sensortech Systems Inc 2014 Page 8 of 15 Rev 5 2014 Figure 4 Set Up Diagnostics Mode Module Parameters Press FUNCTION 4 times ...
Page 9: ...oisture At completion of the Zero Reference calibration the message Zero Reference Done will be displayed The PMT 330 then returns to Continuous Measurement mode The Zero Reference calibration is intended to be performed before each use of the PMT 330 To perform a Zero Reference Calibration 1 Hold the PMT 330 off the table and away from product with the Sensor Electrode clear of any objects moistu...
Page 10: ...cally stored near the PMT 330 charger The Standardization value is calculated so that when using a Span 1 and a Zero 0 the PMT 330 will show a moisture value of 25 when placed on the Standardization Block This value is multiplied by the Span and offset by the Zero For different Span and Zero values a different moisture value will be displayed Example if Span 4 and Zero 30 the moisture displayed wh...
Page 11: ...keys simultaneously to Unlock the PMT 330 3 Press FUNCTION until Diagnostics is displayed 4 Press ENTER to enter Diagnostics mode 5 Press FUNCTION key until Std Factor is displayed 6 Press the PMT 330 Sensor Electrode onto the center of the Standardization Block and hold it down firmly 7 Press ENTER and the number in the lower display will change to the new Std factor The typical Std Factor parame...
Page 12: ...rd is typically calibrated using another reference When the PMT 330 is received from the factory it will have default parameters for Span and Zero The default values have been determined by experimentation and will usually be close enough for immediate use For improved accuracy a regression analysis should be run on a number of product samples representing the normal range of moistures found in ac...
Page 13: ...mple Dry Weight Wet Weight Actual Moisture Measured Normalized Calibrated DW WW 100 WW DW WW Moisture PMT 330 PMT 330 1 46 26 47 25 2 1 3 1 4 03 2 17 1 46 26 47 25 2 1 2 8 3 93 1 76 1 46 26 47 25 2 1 3 4 00 2 03 1 46 26 47 25 2 1 2 9 3 97 1 90 2 56 07 59 94 6 46 6 2 5 07 6 35 2 56 07 59 94 6 46 6 2 5 07 6 35 2 56 07 59 94 6 46 6 1 5 03 6 21 2 56 07 59 94 6 46 6 5 00 6 08 3 56 34 59 76 5 72 6 5 00 ...
Page 14: ...g normalized PMT 330 on x axis and actual moisture on y axis In the example shown original Span 3 and original Zero 3 The linear trend line results in a new slope of 4 04 and intercept of 14 15 rounded to 2 decimal place To enter the calibration coefficients into the PMT 330 first select the product code to be edited Press FUNCTION one time Product Code is displayed Simultaneously press and keys t...
Page 15: ... Sensortech Systems Inc 2014 Page 15 of 15 Rev 5 2014 Figure 9 PMT 330 with Accessories 1 PMT 330 Portable Moisture Tester 2 Charger Cradle and International Plug Adaptors 3 Standardization Block ...
