The CDB-387 is a microprocessor-based, benchtop conductivity, resistivity and TDS meter. The unit has a large LCD display and membrane keypad for easy operation. The meter features automatic temperature compensation, programmable temperature coefficient, recorder output and bi-directional RS-232C output. The CDB-387 measures 5 conductivity ranges, 2 resistivity ranges and 4 TDS ranges. The CDB-387 will automatically select the most suitable range to provide maximum resolution. The CDB-387 operates off ac power or a 9 V battery. The 9 V battery serves as a back-up to retain calibration data, even in the event of a power failure, and allows for portable field measurements. The unit is supplied with a glass dip-style conductivity cell with an integral temperature sensor, K = 1.0, calibration solutions and 9V ac adaptor.
SPECIFICATIONS Conductivity Ranges: 0 to 20.00 µS/cm; 0 to 200.0 µS/cm; 0 to 2000 µS/cm; 0 to 20.0 mS/cm; 0 to 200 mS/cm TDS Ranges: 0 to 20.00 ppm; 0 to 200.0 ppm; 0 to 2000 ppm; 0 to 20 kppm Resistivity Ranges: 0 to 2.000 M?/cm, 0 to 20.00 M?/cm Accuracy: ±1% of reading Automatic Temperature Compensation: 0 to 50°C (32 to 122°F) Reference Temperature: 25°C (77°F) [selectable 20°C (68°F)] Temperature Coefficient: User Temperature Measurement Range: -30 to 130°C (-22 to 266°F) Resolution: 0.1°C Accuracy: ±0.3°C Recorder Output: 0 to 200 mV Digital Output: Bi-directional RS232C Power: 115 Vac with 9V adaptor or 9V battery (included) Display: 12.7 mm (0.5") LCD Dimensions: 210 L x 150 W x 88 mm H (8.3 x 5.9 x 3.5") Weight: 600 g (1.3 lb)