Typical Response Times For Various Step Changes; Table 1 Typical Response Times For Step Changes - Michell Instruments OptiCal User Manual

OPERATION
3.5

Typical Response Times for Various Step Changes

Typical response times for various step changes are shown in Table 1 below. T100
represents the total time taken to reach stability at the new set-point.
T63 and T95 values represent the time taken to reach 63% and 95% respectively of
the step change in relative humidity and/or temperature. (Start temperature = 23°C /
Start RH = 50%)
Temperature
Step 1
Step 2
Step 3
Step 4
Step 5
The time taken depends on the quality of the desiccant and the overall temperature of the OptiCal calibration chamber
The OptiCal can also be used with relative humidity generation only or with temperature
generation only.
For example: If the calibration on the instruments is done and new instruments need
to be inserted, both switches can be set to
in order to save energy.
If only temperature calibration is needed, humidity generation can be switched off.
NOTE: In this instance, the pumps will also stop.
The minimum chamber temperature that can be reached is about 10°C (18°F) below
ambient temperature. The maximum chamber temperature is limited to about +52°C
(+125°F).
14
°C RH %
15 20
15 50
15 80
25 20
25 80
•
Time in minutes
Table 1 Typical Response Times for Step Changes
OptiCal User's Manual
T63 T95
≤12 ≤23
≤2
≤3
≤3
≤3
. This will cause the pump to switch off
OFF
97079 Issue 9.2, March 2016
T100
≤26
≤3 ≤5
≤7 ≤9
≤5 ≤14
≤8 ≤10