Walz MINI-PAM-II, Manual, Page: 60 / 130

Chapter 7 Touchscreen Operation
54
The side panel of the Basic Data window offers four commands:
the SAT key determines effective PS II photochemical yield,
and the Act.L. represents a switch for actinic light.
The MENU key leads to the Main Menu window as in all other
top level windows. The downward arrow key switches to the next
window. Two arrow keys (up and down) are present in all other
top level windows except the last (Actinic Light List; Table 6,
page 50) which requires only the upward key.
Comment on Rec (New Record)
Starting a new Record disconnects current saturation pulse anal-
yses from that of the previous Record. Hence, a SAT command
in a Record without F
0
and F
M
determinations will only result in
data of Y(II), q
P
, and q
L
because calculations of these parame-
ters do not require F
0
and F
M
(see Table 3, page 34). Calcula-
tions of q
P
and q
L
parameters require F
0
’: the two parameters
will not be calculated if the Fo’ mode is inactive and F
0
and F
M
is
not available because the latter two fluorescence levels are in-
dispensable for Fo’ calculations according to Oxborough and
Baker (Section 5.1.2, page 32).
Apparently, in the presence of F
0
and F
M
data, also those fluo-
rescence ratio parameters requiring F
0
and F
M
data will be calcu-
lated. If a Record holds more than one F
0
, F
M
determination, the
last one will be used to calculate fluorescence coefficients. Such
calculations, however, are only valid for Fo,Fm and SAT
measurements with the same sample. Sometimes, Fo,Fm and
SAT measurements with different samples even result in fluo-
rescence ratio parameters that exceed their valid range (com-
pare Table 3, page 34). These invalid data will be displayed in
grey on the touch screen.