Sorel TDC Logger - definition of Sensor0 ... Sensor5?

[kristen]

Hooray! I've got the Data Logger connected via Ethernet to the Controller using Sorel TDC Logger v1.07

Can't find any DOCs?

What do Sensor0, Sensor1 ... Sensor5 map to?

On the controller I'm seeing values like:

Panel 71
S1 60 (Top of tank)
S2 51 (Bottom of tank)
Flow 73 (pump was off)
Return 59
Flow 6.9L/min (when pump on)
Power 4.9kW ( " " " )

These are my best guess:

Sensor0 Panel
Sensor1 S1 (top of tank)
Sensor2 S2 (bottom of tank)
Sensor3 Flow
Sensor4 ?? Value is close to ten-times the Return temperature
Sensor5 ?? Only has values when pump is running. On controller the Flowrate is around 6.9-7.0L/min, Power is around 6.3-7.5kW, Sensor5 shows figures around 400

[Ivan]

Mine isn't connected at the moment (due to BT input plate splitter being fitted, so router in most inconvenient location). However, from what I remember S0 corresponds to physical sensor1 (panel), S1 corresponds with Sensor2 (bottom of tank) etc.

S4 seems to float so unusual numbers. S5 not sure ......percentage of maximum pump speed (or is it just 1 for on and 0 for off)?

Should be able to work it out by unplugging sensors and watching for the fall to ambient temp.

[kristen]

Thanks Ivan.

"unplugging sensors"

Doh! I should have thought of that!

Surprised that S5 wouldn't be L/min (as that is what it is recording).  Don't think it can be percentage of max. pump speed as my pump is low wattage and (I believe) the TDC can't control its speed.

I've got data in an XLS now, so I was going to try to use S5 to calculate kWh/day based on the Flow/Return temperature and S5 and see if I can match the figure that TDC has shown for the day. If I can get that I'm home and dry and can stop remembering to get readings manually each day!

[Ivan]

If you've got one of the ultra efficient low power pumps, then you're right that the TDC3 cannot vary the speed (SO MAKE SURE YOU HAVEN'T GOT VARIABLE SPEED ACTIVATED!!). ALthough, there is now a version of the TDC3 that is designed to work with this type of pump allowing variable speed control.

Does the S5 value vary or is it just flip between a fixed high value and a fixed low value?

[kristen]

7.9.1. Speed control = OFF

Is that for sure that variable speed won't be used? (I did see other settings related to variable speed pump)

S5 varies, but only at the start/end of each cycle, its pretty constant whilst the pump is on, and whenever the pump is on.

e.g.

25.08.2009,13:38:15,72,57,48,66,518,   0
25.08.2009,13:38:25,72,57,48,66,519,   0
25.08.2009,13:38:35,72,57,48,66,531, 348
25.08.2009,13:38:45,72,57,48,66,542, 392
25.08.2009,13:38:55,70,57,48,66,542, 406
25.08.2009,13:39:05,68,57,48,66,553, 415
25.08.2009,13:39:15,66,57,48,66,566, 413
25.08.2009,13:39:25,65,57,48,66,578, 417
25.08.2009,13:39:35,65,57,48,66,574, 415
25.08.2009,13:39:45,64,57,48,67,577, 412
25.08.2009,13:39:55,63,57,48,68,578, 412
25.08.2009,13:40:05,63,57,48,68,585, 415
25.08.2009,13:40:15,62,57,48,69,577, 173
25.08.2009,13:40:25,62,57,48,70,569,   0
25.08.2009,13:40:35,62,57,48,71,566,   0

Distribution of values for a given day:

360   15
370   19
380   33
390   51
400   339
410   1076
420   98

values range from 30 to 440, other values are all < 10

Is sensor calibration important (its at factory defaults I think):

Offset S1 = -1 (0.5C per step)
Offset S2 = -1    "      "     "
Offset S3 = 0     "      "     "
Offset S4 = -1    "      "     "
Offset S5 = -1 (0.1C per step)
Offset S6 = -1 (Correction for the VFS sensor)