PIN/PINLESS DEEP SENSING MOISTURE METER WITH REMOTE PROBE USER’S MANUAL MMD900 Please read this manual carefully and thoroughly before using this product.
TABLE OF CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 – 5 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 What’s in the Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 7 Setup Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Install Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thank you for purchasing General Tools & Instruments’ MMD900 Pin/Pinless Deep Sensing Moisture Meter with Remote Probe. Please read this user’s manual carefully and thoroughly before using the meter. The MMD900 is designed for use in woodworking, water damage restoration, building construction and home renovation.
The distinction between absolute and relative readings is important to understand. The moisture level measurements made by either pair of test pins—on the instrument or on the remote probe—are displayed in units of %WME (Wood Moisture Equivalent) simultaneously on a 0-99.9 count digital LCD and a 40-LED analog bar graph. Pin measurements are accurate within 3% of the reading plus 5 digits.
• The 40-LED analog bar graph groups LEDs of three different colors (green, yellow and red) into low, medium and high moisture bands. Each readout (%WME or REL) can be accompanied by a beeper that can be programmed to sound in different ways in response to different moisture levels or operations. The correlations make it easy to use sight and/or sound to pinpoint areas of peak or relative wetness. The beeper can be disabled without affecting measurements.
WHAT’S IN THE CASE The MMD900 comes in a custom molded plastic case along with a remote pin-type probe and cable, a 9V battery, two pairs of replacement pins and this user’s manual. PRODUCT OVERVIEW The figure shows all of the controls, indicators and physical features on the front, bottom, top, back and right side of the MMD900. Familiarize yourself with their positions and functions before moving on to the Setup Instructions.
A. Calibration check holes B. Protective cover C. 15mm replaceable test pins D. Indicates display is locked (frozen) E. Measurement mode indicator (REL shown) F. Indicates beeper is enabled G. Indicates battery is weak H. Sensing area (on back of meter) I. Jumbo LCD display J. Five-function Mode button K. Four-function button L. Slots for holding protective cover (on bottom of meter) M. Battery/spare pins compartment cover (on back of meter) N. Tri-color 40-LED analog bar graph O.
OPERATING INSTRUCTIONS To power on the meter, press the button and hold it for at least three seconds. (To power off the meter, follow the same instruction.) You can use the meter immediately to measure moisture levels using the factory-set defaults for beeper and backlight operation and auto power off activation time. By default: • The beeper is enabled, and beeps faster the higher the readout above 17%WME in pin measurement mode (17 in REL mode). • The auto power off function is disabled.
To use the remote probe, remove the small rubber yellow plug from the jack on the right side of the meter (callout P of the figure). Then insert the white plug at the end of the cable into the jack. To make a surface moisture level measurement, press the Mode button as many times as necessary until the text “%WME” appears on the top line of the LCD. Then press the test pins of the meter or the probe against the target material.
To scan a material for an area of peak wetness in either measurement mode (%WME or REL), first make sure that the beeper is enabled (indicated by the icon on the top line of the LCD). If the icon is present, scan the material while paying attention to the beeper’s frequency. The faster the beeper beeps, the wetter an area is. Near the high end of the meter’s measurement range, the beeping sounds almost constant.
The table below details the five function options available to you in Setup mode. Function Option No.
To change any setting, use the Mode button to cycle through the choices (0 or 1 for Options 0, 3 and 4; 0, 1, 2 or 3 for Options 1 and 2). When the setting you want appears as the right digit on the display, press the button to save it. Each time you save a setting, the display advances to the next Option. To leave a setting unchanged, press the button to advance to the next Option. Once a setting has been chosen for Option 4, the meter will automatically exit Setup mode and enter Measurement mode.
SPECIFICATIONS Measurement Ranges Measurement Accuracy Length of Test Pins Length of Remote Cable Measurement Depth (pinless mode) Pinless Sensing Area LCD Range/Size LCD Resolution Bar Graph Composition Bar Graph Resolution Auto Power Off Low Battery Warning Level Current Consumption Calibration Point Operating Temperature Dimensions Weight Power Source 0 to 99.9% WME and 0 to 99 REL ±3% of reading + 5 digits in pin mode 15mm (0.6 in.) on top of meter; 10mm (0.4 in.
WARRANTY INFORMATION General Tools & Instruments’ (General’s) MMD900 Pin/Pinless Deep Sensing Moisture Meter with Remote Probe is warranted to the original purchaser to be free from defects in material and workmanship for a period of one year. Subject to certain restrictions, General will repair or replace this instrument if, after examination, the company determines it to be defective in material or workmanship.
RETURN FOR REPAIR POLICY Every effort has been made to provide you with a reliable product of superior quality.
GENERAL TOOLS & INSTRUMENTS 80 White Street New York, NY 10013-3567 PHONE (212) 431-6100 FAX (212) 431-6499 TOLL FREE (800) 697-8665 e-mail: sales@generaltools.com www.generaltools.com MMD900 User’s Manual Specifications subject to change without notice ©2011 GENERAL TOOLS & INSTRUMENTS NOTICE - WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS.
