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User's Guide Heavy Duty pH, mV, & Temperature Meter Model 407227 • Measures pH, mV and Temperature • RS-232 PC Interface • F switchable • Front panel Slope and Calibration adjustments Introduction Congratulations on your purchase of Extech’s pH, mV, and Temperature Meter. This professional meter, with proper care, will provide years of safe reliable service.
3. Place the temperature probe and a mercury thermometer in water. 4. Adjust VR6 (inside the battery compartment, see diagram below) until the displayed value matches the mercury thermometer reading. Inside battery compartment ShopExtech Page 3 Model 407227 Ver. 2.1 Oct. 2002 1.877.766.5412 Shop for Extech products at: .com...
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4. Place the electrode in the test solution and read the millivolt (ORP) value. 5. Rinse the electrode with distilled water before storing. Note that calibration is not required for the ORP function. ShopExtech Page 4 Model 407227 Ver. 2.1 Oct. 2002 1.877.766.5412 Shop for Extech products at: .com...
RS-232 Serial PC Interface The 407227 is equipped with an RS-232 serial data port. This interface was designed to operate with the Extech Data Acquisition Software (Part Number 407001). For detailed information contact your distributor or refer to the 407001 manual.
Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies on sensors and cables).