Salt Measurement

Range: 0.01% to 5.0%

Resolution: 0.01% / 0.1%

Temperature Range: 32øF to 158øF (0øC to 70øC)

TDS Measurement

Range: 0 to 999ppm (mg/L)

Resolution: 1ppm (mg/L)

Accuracy: ñ3% full scale @ 20øC

Temperature Range: 32øF to 104øF (0øC to 40øC)

Temperature Measurement

Range: 32øF to 212øF (0øC to 100øC)

Accuracy: ñ2øF (1øC) (32øF to 158øF / 0øC to 70øC)

Power Supply

LR44 or LR1154 Button Battery (x3)

Dimensions

0.65? x 1.25? x 10.03? (16.4mm x 32mm x 255mm)

Weight

2oz (57g) including button batteries

Switching Between Celsius and Fahrenheit on the 390

1. Press the ON/OFF key.
2. Press and hold down the HOLD/CAL key for approximately 3 seconds until a beep is heard.
3. Release the HOLD/CAL key after the beep. The øF annunciator will be displayed.
4. Repeat the steps above to change back to Celsius.