PTZ-BOX 5.0 User manual, document edition: 13
10
𝐾1 =
𝑍
𝑍𝑏
(1b)
Figure 1. Diagram of calculation algorithm operation
WARNING! In algorithms SGERG-88, AGA8-G1, AGA8-G2, AGA NX-19-mod and K1-const device
requires to program values of superior calorific value
Hs
and relative density
d
specified for used
base conditions
Tb
and
pb
and combustion process
T1
and
P1
(always P1=pb). If given values of
Hs
and
d
are known for different base conditions than ones used in the device, they must be
recalculated for those base conditions before programming. Methods for recalculations of
Hs
and
d
between different base conditions are described in standard EN ISO 6976:2005, annex J and in
standard EN ISO 12213-3:2010, annex D. When programming full gas composition, no further
recalculations are necessary.
1.2.5
Increment of volume at measurement conditions
Device’s configuration allows to choose
method of obtaining volume at measurement conditions
basing on data from pulse inputs LF and HF, additionally from digital input of encoder.
In configurations with LF as main counting input (configurations: LF1, LF1/LF2, LF1/HF1, LF1/SCR,
LF1/EN) increment of volume at measurement conditions
dVm
is calculated with formula:
𝑑𝑉𝑚 =
𝑑𝐿𝐹
𝐿𝐹 𝑓𝑎𝑐𝑡𝑜𝑟
(2a)
where:
dLF
–
increment of pulses on LF input during measurement-calculation cycle,
