## 3119Understanding Monlog Data for Brusa NLG4 (warning, long post)

Expand Messages
• Aug 31, 2007
I have been trying to decipher the rather crytic text displayed on
the Monlog screen. Below is a rough snapshot of the text. Note this
is coming from a car with a 156V lead acid pack.

COMBI - monitor program on COM 1: Version 2.44, Brusa Elektronik Co,
1997

Status NLG4:0 Um_pk[V]:330.00 Tpstg[C]47.53 power[%]100.00
Imains[Amp]:15.100 Um_eff[V]:246.00 Tbat1[C]31.10 Pprim[W]3680
Ibatt[Amp]:18.802 Ubatt[V]:178.00 Tbat2[C]31.5 F_out[Hz]:50000
Tbatt[C]31.50 Psec[W]3348
Section:1 Sect1 Sect2 Sect3 Sect4 Sum1-5 total Calc E
time [min] 38.1 0.0 0.0 0.0 38.1 357913.9 0.0
charge[ah] 12.0 0.0 0.0 0.0 12.0 35194.5 -1.3
energy[wh] 2338 0 0 0 2338 6944521 0
UBmin[V] 151.57 499.99 499.99 499.99 151.57 1.80
UBmax[V] 178.28 0 0 0 178.28 251.36
TBmin[C] 31.54 100.00 100.00 100.00 31.54 -25
TBmax[C] 32.12 -100.00 -100.00 -100.00 32.12 51.61

I'll try to explain the fields that I think I understand, and then
ask if anyone can help with the remainder.

All of the fields with [C] also have the little degree sign, so they
are obviously associated with temperature in celsius. All of the
fields with [V] would be in volts, [ah] would be amp-hours, [min] is
minutes, [%] is percentage.

Status NLG4: 0 should give the charger's current status, with 0 being
in good health and a different number means something is wrong, per
the table that pops up if you press F1.

Imains[Amp] has the number vary slightly while the charger is
operating, and I believe it is the amount of amps that the charger is
drawing from the house.

Ibatt[Amp] also varies slightly while charging, and I am guessing it
is the amount of amps that the charger is supplying to the
batteries. Since my snapshot shows that the Imains number is smaller
than the Ibatt number. Since the charger is getting 240V from the
house, the 15.1A * 246V = 3715W coming in. The batteries are getting
18.802A * 178V = 3347W with the difference being lost from heat or
whatever.

Um-pk[V] is a mystery to me.
Umeff[V] I think is the voltage coming in from the house.
Ubatt[V] I think is the voltage feeding into the batteries.
Tpstg[C] is a mystery to me.
Tbat1[C] I think is the temperature in battery box #1 (whichever that
is)
Tbat2[C] I think is the temperature in battery box #2
Tbatt[C] I think is the highest temperature measured, which is the
temperature used to compensate the charging cycle somehow.
power[%] is a mystery to me, although it could just mean "full power"
Pprim[W] I think is the power (in Watts) that is being supplied to
the charger from the house.
F_out[Hz] fluctuates during charging, and I think is the frequency of
the DC voltage going into the batteries. As a layman, I thought only
AC had a frequency (like 60Hz) and DC was flat...
Psec[W] I think is the power (in Watts) that is being supplied to the
batteries.

time[min] has its value accumulate during charging, and is likely the
time spent charging. Only section 1 on my screen seems active, with
sections 2,3,4 & 5 unused. I wonder if this is true for other people.

charge[ah] also accumulates during charging, and counts the Amp-Hours
charged back into the batteries.

energy[wh] also accumulates during charging, and counts the Watt-
Hours charged back into the batteries.

UBmin[V] this value stays the same through charging, I think it is
the voltage of the batteries when the charger first began its charge
cycle.

UBmax[V] this value has been slowly creeping up during the charge
cycle. Perhaps this is the batteries current voltage.

TBmin[C] this value seems to creep down during the charge cycle
(which is occurring late in the evening). So, this may be the lowest
temperature observed during the charge cycle. This is mysterious
since it is higher than the Tbat values!

TBmax[C] this value has stayed constant through the charging cycle,
probably because the temperature outside has been dropping. So, this
may be the highest temperature observed during the charge cycle.

the Calc E values are a complete mystery to me.

So, these are my thoughts on the Monlog data. If anyone can provide
any insight, confirmations, or corrections I would very much
appreciate it!!!