| |
General Troubleshooting
- If the instruments reads "Prob", "LO" or "-1", check that the probe is plugged in.
- If the battery icon, "B", or "Batt" appears on the display, change the battery.
- To test a probe, use a known-good thermometer and insert the probe into an ice bath. It should read ~32°F. Flex the cable at the handle and connector to test for intermittant opens while testing.
- If the instrument does not read ~32°F, pull the probe out slightly, and place a coin, key, or paperclip (any small metal object) across the connector pins. If you then get approximately a room temperature reading, the probe is no good and needs replacement.
- To test a probe without a thermometer, use a multimeter. Look for a basic short circuit (continuity) between the connector pins. Flex the cable at the handle and connector to test for intermittant opens while testing.
- When checking the accuracy of the thermometer with an ice bath, realize that the results do not have to be within the stated accuracy printed on the instrument label. The accuracy limits applied are determined by the user, based on their application. Additionally, this test includes the probe error, while the limits on the instrument do not include probe error.
My thermometer reads -1 (or "Prob" or "Lo") all the time. What does this mean?
These are built in functions to let you know that your probe is not plugged in, or has a broken wire in it. Make sure the probe is plugged in, or try another probe.
My thermometer reads the temperature, then reads -1 (or "Prob" or "Lo"), and switches back and forth between these readings. What does this mean?
The probe may have an intermittant open circuit and need replacement. Test as described in the troubleshooting section.
Why does my thermometer seem to read OK in an ice bath, but seem way off at higher temperatures?
If the readings seem "off" make sure the probe is the correct thermocouple type for the instrument. (Type K probe with type K instrument, etc.)
What does it mean that "no calibration is required" for some thermometers? Don't all thermometers need regular calibrations?
For the thermocouple line of instrumentation when we say "no calibration required", we mean calibration with adjustment. A regular calibration program of calibration by comparison to another standard, such as an ice bath, is needed so that you can prove to auditors that the instrument is still calibrated. You could also simply return the instrument to Cooper-Atkins for a factory calibration with adjustment.
How far off is my thermometer when I use it in the freezer?
Let the thermometer rest in the freezer for 45 minutes or so. Measure an ice bath. This is the absolute offset, and it is repeatable. Apply this to your measurements when using the thermometer in the freezer.
How do I make an ice bath?
Fill a cup with crushed ice. Add enough water to make a slurry. It should be slushy. (Ice water made of large ice cubes and water will not usually reach 32°F unless vigorously and constantly stirred.)
|
Contact Us