Whole House Systems
Drinking Water Systems
Replacement Filters
HM-DIGITAL-DM-2
HM Digital DM-2 Commercial In-Line Dual TDS Monitor
format_list_bulleted Features & Specs
description Instructions
- The DM-2 is designed to be used with flowing water. Due to nature of mobile charged ions in electrical conductivity and flowing water, it is normal to experience discrepancies and fluctuations within 2% of the readings
- Make sure the sensor is properly inserted into the fitting. Once the sensor has been inserted into the fitting, look through it. You should only see one metal probe
- Always wait 10-20 seconds for more accurate readings. Rinse in de-ionized water or alcohol after prolonged use to ensure proper readings. Do not drop or submerge unit in water. Do not store unit in high temperature or direct sunlight
- HM Digital monitors are factory-calibrated at 342ppm NaCl. Calibrate as close as possible to the test sample. Ensure accuracy by recalibrate your meter using a commercial standard solution at 25 degrees C (77 F); prior to usage and after prolonged usage
- For drinking water, it is recommended to calibrate in a range of 90 ppm to 700 ppm. On the DM-2, calibration for both sensors is simultaneous. You need a tube/hose that is the same size as the fittings., a bucket or basin, and a pump
- Step 1: Attach the IN and OUT sensors to the tubing that you will use for the calibration. It will be necessary to cut the tube in two places so that the solution will be running through both and so that the sensors are not too far apart from each other
- Step 2: Configure the tube within a bucket or basin, using a pump so that the calibration solution will be cycled through the tube. In other words, the calibration solution needs to be flowing over both sensors to calibrate properly
- Step 3: Turn on and measure calibration solution. If reading is not within 2% of solution
- Step 4: Once the meter reads within 2% of the solution, gently release pressure on the screwdriver and remove from the trimmer pot. If the screwdriver is retracted abruptly, the reading may jump
- Step 5: Turn the monitor off and on. Verify the readings for both sensors. If the readings are accurate with 2%, calibration is complete. If not, repeat the procedure
The DM-2 TDS Meter installs on industrial systems such as car washes, window washing, manufacturing, and food processing. The Commercial inline Dual Monitor is highly efficient and accurate due to its advanced microprocessor technology. This Dual Monitor displays total dissolved solids levels of the feed water and product water with in and out electrode probes. The DM-2 Monitor has an auto-off function that conserves battery power. The unit shuts off automatically after 20 seconds. Dual Range: Measures from 0-999 ppm, with a resolution of 1 ppm. From 1000 to 9990 ppm, the resolution is in 10 ppm increments, indicated by a blinking 'x10' image. Factory Calibrated: The DM-2 is calibrated with 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver. This TDS Monitor comes equipped with 1/4-inch Mur-lok Quick-Connect T-fittings. (Also available with 3/8-inch or 1/2-inch fittings.). The DM2 inline TDS Meter installs quickly and easily. Differences from the DM-1: The DM-2 Monitor is designed for commercial/industrial applications. This Dual Monitor is stronger and has water-resistant casing. Calibration can be done individually or simultaneously on each line. The DM-2 has an improved design, including an extra large, easy-to-read LCD display. The DM-2 Dual Monitor has longer, waterproof, shielded cables and is equipped with a variable mounting bracket.
HM-DIGITAL-DM-2 is comparable with the following part number(s)
- DM2
- DM-2
- DM-2-2550
- HMDM-2