Clearing Calibration
Before setting calibration, always clear the existing calibration. To clear calibration:
1. Hold the TEMP key for 5 seconds until the display says CALIBRATE? on the top
line and ENTER/CANCEL on the bottom line of the display.
2. Depress ENTER
3. Then depress ERASE. The display will now say ERASE CAL? On the top line
and ENTER/CANCEL on the bottom line of the display.
4. Depress ENTER
The existing calibration is now erased.
Single Point Calibration
1-
Set the unit to the target temperature to be calibrated. Measure the chamber
temperature using your laboratory standard. Be sure to allow the chamber and
your thermometer time to equilibrate at the target temperature you desire.
2-
Push and hold the TEMP key for five seconds until the display says
CALIBRATE? on the top line of the display and ENTER/CANCEL on the bottom
line.
3- Depress
ENTER.
4-
Enter the value onto the display as read from your temperature standard and
depress ENTER.
Single point calibration is now complete and will be held in memory until changed.
Two Point Calibration
For two point calibration, one calibration temperature must be above 37.0 ºC and the
other must be below 37.0º C. For best results, use temperatures around 10.0 ºC and
60.0º C. Follow the calibration procedure as for a single point. Then repeat the
procedure at the second point. When you calibrate the second point, the calibration of
the first point is not affected. However, all other temperatures will adjust to a “straight
line” through the two calibration points.
NOTE:
Measuring the chamber temperature is easy to do, but not necessarily
accurately. Generally speaking, glass thermometers found around a lab are not
accurate enough or readable enough to do a good job. Good, certified glass
thermometers are available from lab supply dealers as are fairly accurate digital
thermometers
.
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Summary of Contents for EchoTherm IN35-12VDC
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