Measurement Time T - Honeywell BCU 460 Technical Information

Valve proving system

6 .1 .5 Measurement time t

The sensitivity of the tightness control in the BCU can
be adjusted for each individual system by adapting the
measurement time t . The longer the measurement
M
time t , the greater the sensitivity of the tightness
M
control. The measurement time is set using parameter
A056 to a value between 3 and 3600 s, see page 101
(Measurement time for Vp1).
The required measurement time t
Inlet pressure p [mbar]
u
Leakage rate Q [l/h]
L
Test volume V [l]
p1
Calculation of the test volume, see page 46 (Test volume Vp1)
For one test volume V
valves
Adjustable using parameter A056
(
2 x p
t [s] =
M
For a large test volume V
time
Adjustable using parameter A056
(
0.9 x p
t [s] =
M
Conversion into US units, see page 136 (Converting
units)
BCU 460, BCU 465 · Edition 11.19
M
is calculated from:
M
between 2 gas solenoid
p1
)
x V
u p1
Q
L
with reduced testing
p1
)
x V
u p1
Q
L
Leakage rate
The BCU tightness control makes it possible to check
a specific leakage rate Q
the maximum leakage rate Q
flow rate Q [m 3 /h].
(N)max.
Q
=
Leakage rate Q [l/h]
L
1000 x 1 [m
▼
. Within the European Union,
L
is 0.1% of the maximum
L
3
[m /h] x 1000 [l/h]
(N)max.
3 /h]
45