19
TEMPERATURE CALIBRATION
•Prepare a beaker containing
crushed ice and water at 0 °C
(32 °F) and another one with hot
water at 25 °C (77 °F) or 50 °C
(122 °F) .
•Use a Checktemp or another
calibrated thermometer with a
resolution of 0 .1° as a reference
thermometer .
•Immerse the temperature probe
in the beaker with ice and water
as near to the Checktemp as
possible .
• Once visualized the selected output, press the
key
to choose the range of the analog output (0-20 mA or
4-20 mA); then press the CFM key to confirm the choice .
• Once selected and confirmed the
range for the analog output, the
secondary LCD shows the first
point of calibration (1 or 4 mA)
and the primary LCD displays the
range of the actual calibration .
• With the tester check the real current value provided by
the instrument at the output port . If this value is different
from the expected one, it is possible to change the cur-
rent erogated by the instrument pressing the
or
key .
• Adjust the value until it matches with the first point of
calibration, then press CFM to confirm . The instrument
will turn to the second calibration point (20 mA) .
• The calibration procedure is the same as for the first point .
• Once the instrument is calibrated for both points (and
confirmed), it will exit from the calibration menu .
