CONTENTS
Overview…………………………………………....……………….1
Contact Information………………………………………………...1
Housing and Screen Description…………………………………...2
Taking Measurements……………………………………………....3
Switching Modes…………………………………………………... 4
Calibration………………………………………………………….. 5
Care, Maintenance & Techniques…….…………………....……........6
Warranty……………………………………………………………. 7
OVERVIEW
Thank you for purchasing HM Digital’s COM-100. The COM-100 is a highly advanced handheld meter that is
completely waterproof. The meter measures three parameters: Electrical Conductivity (EC), Total Dissolved Solids
0.7 (442
TM
)or 0.5 (NaCl) factors, as well as selectable modes for measurements in the µS, mS, or ppm scales,
making it extremely versatile for a wide range of applications. Though the meter is factory calibrated at 1413 µS,
it also features digital calibration for easy and precise calibration to any point within its range.
CONTACT INFORMATION
If you have any problems or questions regarding your meter, please contact HM Digital, Inc.
HM Digital, Inc. info@hmdigital.com
5819 Uplander Way www.hmdigital.com
Culver City, CA 90230, USA 1-800-383-2777
SPECIFICATIONS
EC Range: 0 - 9990 µS; 0 - 9.99 mS
TDS Range: 0 - 8560 ppm (mg/L); 0.7 (442) scale, 0 - 5000 ppm (mg/L); 0.5 (NaCl) scale
Temperature Range: 0.1 - 50°C; 32 - 122°F
Resolution:
EC: 0 - 99: 0.1 µS / 0.01 mS; 100 - 999: 1 µS / 0.10 mS; 1000 - 9990: 10 µS / 1.00 mS
TDS: 0 - 99: 0.1 ppm / 100 - 999: 1 ppm / 1000-9990: 10 ppm
Temperature: 0.1 °C/F
Accuracy: +/- 2%
EC-to-TDS Conversion Factor: Pre-programmed, non-linear conversions for 0.7 (442
TM
)or 0.5 (NaCl) solutions,
selected by the user
Temperature Compensation:
Calibration: Digital calibration by push button (to any point within the range)
After 5 minutes
Probe: Detachable, with platinum electrodes
Display: LCD panel
Housing:
Power source: 2 x AAA batteries (included)
Battery Life: Approximately 100 hours of usage (high ranges use greater power consumption)
Dimensions: 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 inches)
Weight: 127g (4.5 oz) without case
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