2.8 Frequently asked questions
Question:
I am using at present a ACRL010 on a HygroPalm 3, input 1. I plug into the M-series. Input 2 is
connected to a MOK-02-B5 with my reference HygroClip. I read the unit and compare the value with the
value of the HygroClip on input 2. I go then to adjust the M22 series. I go to adjust REF. Palm displays
“Palm = Reference” and I press OK, and I adjust my M-series. Is this OK or do I risk errors on the ACRL
010 ? The input 1 of the HygroPalm is configured for a digital probe.
Answer:
The HygroClip probes connected on any of the M-series transmitters can be adjusted that way. It
must be pointed out, that only the HygroClip probes, but not the output signals can be adjusted
that way. Of course, the output signal will be changed also according to the adjustment deviation
of the probe.
Question:
When I do a multi point adjust, I do e.g. 35 % as first point and I come out of the menu and change my
solution to e.g. 80 %. I then await stabilization and go back into the adjust menu and do my 80 %. How
does the clip know that its not a 1 point adjust at 80 % instead of a second point at 80 %? The fact that I
began at 35 % does it memorize or does this set something off ?
Answer:
The determination is done in the adjustment window of HW3. There you select either a single or
multi-point adjustment.
If a multipoint adjustment is done, the software will check for the entered values.If a value
between 25 and 55 %rh is entered, the algorithm will consider this as the offset point. A value >55
% is considered as slope value, while a value >1>25 % is used for linearity adjustment in the low
range.
Question:
When I do a 1 point adjustment, is the adjusted probe only correct for the point done and false for the rest
of the curve.? When I do one point do I not just displace the whole slope up or down?
Answer:
A one point adjustment always just influences the offset, but not the slope and neither the
linearity. This means that on the particular point, the instrument will be accurate, but the farther
away from that point, the bigger the deviation. Within HW3 and also with HygroPalm handhelds,
you can always select the mode of adjustment: 1 point or multiple point. When you select one
point, you definitely move the offset and only the offset.
The offset is the parallel movement of the whole curve in vertical direction as shown in the left
graph, while the slope is the steepness of the curve, as the graph to the right shows.
Offset
Slope
A fourth point may be adjusted in order to get perfect linearity.
Details see in subsequent pages.
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