Digital Thermometer Troubleshooting Quiz

What is the correct voltage and polarity that must be applied to the terminals during the checkout procedure?

• 0-5V, positive on the terminal

• 0-5V, negative on the terminal

• 0-15V, positive on the terminal

• 0-15V, negative on the terminal

What should be done if the problem with the digital thermometer is still uncorrected after checking the connections?

• Replace the sensor

• Replace the display head

• Replace the entire unit

• Replace the battery

What is the resistance value at 32°F (0°C) for the digital thermometer?

• 3024 ohms

• 3365 ohms

• 3948 ohms

• 3014 ohms

What is the accuracy of the digital thermometer at 32°F (0°C)?

• ± 1°F (± 0.6°C)

• ± 2°F (± 1.1°C)

• ± 3°F (± 1.7°C)

• ± 4°F (± 2.2°C)

What is the purpose of the small recalibration screw on the digital thermometer?

• To adjust the display brightness

• To adjust the temperature reading

• To adjust the power supply

• To adjust the sensor position

What is the first step in the thermostat checkout procedure?

• Set the thermostat dial to 6°F (3.3°C) or more below the unit's room temperature.

• Slowly rotate the dial CCW until the dial setting reaches approximately 3°F below the unit's room temperature.

• Set the unit to Mode 1.

• Verify that the thermostat switch sequence is correct.

What should be done after setting the thermostat dial to 6°F (3.3°C) or more below the unit's room temperature?

• Set the unit to Mode 1.

• Slowly rotate the dial CCW until the dial setting reaches approximately 3°F below the unit's room temperature.

• Verify that the thermostat switch sequence is correct.

• Tighten the screws with the indicator mark.

What is the correct procedure for the thermostat calibration?

• Prepare an ice water bath and immerse the thermostat sensing bulb.

• Place the sensor bulb in the ice water bath.

• Slowly rotate the dial CCW until the dial setting reaches approximately 3°F below the unit's room temperature.

• Set the thermostat dial to 6°F (3.3°C) or more below the unit's room temperature.

What is the correct action to take after preparing an ice water bath for thermostat calibration?

• Set the thermostat dial to 6°F (3.3°C) or more below the unit's room temperature.

• Slowly rotate the dial CCW until the dial setting reaches approximately 3°F below the unit's room temperature.

• Remove the clamps in the evaporator.

• Place the sensor bulb in the ice water bath.

What should the sensor resistance be at 32°F (0°C)?

• 3000 ohms

• 3260 ohms

• 3500 ohms

• 3948 ohms