Michell Instruments HygroCal100, User Manual

Page: 42 / 54

HygroCal100 User’s Manual
34 97500 Issue 3, January 2018
MAINTENANCE
Install and confi gure an authoritative external reference instrument before proceeding. If
this is not done, then the External Reference Setup Screen will be displayed. Proceeding
from here will begin the calibration correction routine.
12:13
Calibration Correction
Set Point Int. Reference Ext. Reference Time
30.0
50.0
70.0 30.9
0.0
0.0 32.1
0.0
0.0
14 : 56
Figure 34 Calibration Correction Screen
The Calibration Correction Screen will then be displayed, and the chamber set point will
be changed to the fi rst point in the routine. After 15 minutes, the values read by both
the sensor and reference will be sampled to determine the required correction. An icon
labelled
next
will appear in the bottom right of the screen - touch this to confi rm and
continue to the next point.
After all points are complete, the
Apply
button will appear. Pressing this will apply the
table and complete the calibration.
At any point during the process, touching the
Exit
icon will abandon the current
calibration.