WS-8610U-CH "error codes" ?

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Hi,

??? I was curious about the display of RH% on my still working, but damaged, WS-8610U Wireless Data Logger base unit,? and also on one of its Remotes (TX7U) T&H transmitter.

??? When the data logger base station suddenly became stuck, indicated a “99%” reading, I just attributed it to a slowly failing unit, since the temperature readings were still OK.?? However, I wonder if there might be something I can fix – possibly a bad, shorted or open circuit board trace. I know that “Thermistors” can display a fixed value of resistance, when open circuited, and now wonder if the value “99” is actually an ERROR CODE NUMBER, giving a clue to what is ailing it.

??? Odd thing, though, about the base unit T&H though. When I downloaded its log file, the base station temperature column of course was fine, but the HUMIDITY column had a few lower values (of 1” and 2 % perhaps while ramping up after initializing), then a pair of entries indicating? “OFL”, and the remainder was all “99”.

??? It almost seems like it started fine for a few samples – lasting about 2 minutes?? – then dropped into an OFL and 99-error codes. It did this a few more times, further down in the log file Base Unit Humidity, before it just stayed on as 99.

SAMPLE Log from fridge (Base Unit) & freezer (TX7U) test: (remote was replaced with a spare “Good” one)

Date & TIME	BASE UNIT-Indoor Temperature FRIDGE TEMPERATURE Deg-F	Indoor Humidity	Outdoor Temperature 1 FREEZER TEMPERATURE DegF	TX7U = Outdoor Humidity 1

TESTED FOR 9 HOURS	START OF FRIDGE TEST		START OF FREEZER TEST
30.03.2016 01:00	39.3	2	0.3	56
30.03.2016 02:03	39.3	2	0.3	56
30.03.2016 02:05	39.2	2	-0.7	58
30.03.2016 02:10	39.3	1	-0.4	59
30.03.2016 02:15	39.3	? OFL	0.5	61
30.03.2016 02:20	39.5	? OFL	1.2	62
30.03.2016 02:25	39.5	99	2.1	63
30.03.2016 02:30	39.7	99	3	64
30.03.2016 02:35	39.7	99	3.9	65
30.03.2016 02:40	39.7	99	4.6	65
30.03.2016 02:45	39.2	99	3.5	60

?? ETC ...........

??? I came to this suspicion “of an Error Code being displayed”,? when eventually the remote TX7U briefly flashed a similar format,? “44” (error),? during battery re-install, for a split second, before setting its display to “OFL”. I wonder what an 44-error might be, if indeed,it is an error code.

Odd thing is that both units indicate a “double digit” ... 99 and 44 ... so they likely aren’t actual %RH values.

??? So, my question to experts here,? is whether the 99 & 44 are actually error codes, and what is their meaning?

??? Finally, when I opened up the TX7U case, I see there are two black covered IC chips.

??? On the remote’s PCB, the large black blob I assume to be the microprocessor, which probably is used as the temperature reading sensor, just as Intel PC processors do. Then ... is that smaller block covered tiny chip at the narrow end of the PCB (where the case has breather holes) – “the RH sensor” ... and would it be indicating 44 on open,? or a short,? circuit? The traces seem solid, but wonder how else to interpret the 44 code (and likewise the 99 on the base unit).

Thanks for any help or clues what to check.

Joe

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