Instruction Manual MM850432 ed. 05
103
11.4 RTDs
certifications
Channel 2 on
MicroCal 20 XP
and
MicroCal T20
models only can be set to measure mode. This option allows using the instrument as a 2 channels high accuracy thermometer.
The most important application is to compare one Working Standard with the TC or RTD element using one only instrument. Use the
MicroCal T
series dry-block temperature
calibrator to generate the temperature.
The following procedure is used to certify a RTD
•
Connect the instruments like in the figure beside, properly setting the inputs in relation to the RTD or Tc used (see par.
5.5.1, 5.5.2 e 5.5.3).
Verify calibration points setting the temperatures on a furnace (wait about 10/15 minutes to stabilize each point) and check for
eventual errors.
NOTE
: if you have the linearization file of a RTD, set the corresponding channel with the proper file (see par. 5.5.8), and then
proceed to the certification
REMARK:
AS THE AIM OF A CALIBRATION PROCEDURE IS THAT ONE TO CHECK AN ERROR
,
WE SUGGEST SETTING THE DISPLAY IN ORDER
TO SHOW OF BOTH CHANNELS AND THE DIFFERENCE BETWEEN THEM
,
WHICH GIVES US STRAIGHTFORWARDLY AN ERROR VALUE
.
