Honeywell themis plus EI3, Руководство по эксплуатации

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GB-11
D
GB
F
NL
I
E
▷
In the test procedure described below, it is guar-
anteed that the unit under test always performs
full measuring unit rotations.
Master meter test procedure
∆t
N
Q
N
∆t
P
2 3 4 5
6 1
 Set the test flow rate.
 Start measuring the reference time Δt
N
at mark-
er 1.
 Immediately afterwards, briefly press the selec-
tion key on the index to start the cyclic test
on the unit under test – marker 2. The index will
thus be “armed” for measurement.
▷
As soon as one of the significant sensor posi-
tions has been detected, the unit changes to
measuring mode – marker 3. A beep confirms
the start of the measurement.
▷
Once the required minimum testing time has
been reached, the measurement can be termi-
nated – marker 4.
4 Briefly press the selection key in order to end
the measurement.
▷
Measurement on the unit under test stops au-
tomatically once the full number of measuring
unit revolutions has been completed – marker 5.
▷
A beep acknowledges the end of the measure-
ment.
▷
Measurement is terminated automatically after
5 hours.
5 Stop the test on the master meter – marker 6.
▷
The measurements are then available.
6 Read off the flow rate on the master meter or
calculate if necessary:
a) taking into account the inherent error of the
master meter:
Q
act,N
= V
N
x 3600 s/h / ((1+F
N
/100) x Δt
N
)
b) If the inherent error of the master meter has
already been taken into account in the dis-
played volume (V
N
= V
act,N
):
Q
act,N
= V
act,N
x 3600 s/h / Δt
N
7 Calculate the flow rate on the unit under test:
Q
P
= V
P
/Δt
P
8 The accuracy is checked by comparing the flow
rates. The pressure and temperature values of
the unit under test corrected with reference to
the master meter have already been taken into
account here:
F
P
= 100% x (((Q
P
x p
P
x T
N
) / (Q
act,N
x p
N
x
T
P
)) - 1)
The following applies:
T
P
= (273.15 + {t
g
}) K
p
P
= {p
g
} mbar
If Q
P
in step 7 is determined from the non-con-
verted volume V
P
, the following applies:
T
P
= (273.15 + {t
g
}) K
where t
g
= relevant gas temperature on the unit
under test in °C (display)
▷
The curly brackets mean “numerical value of”.
▷
On a nozzle test rig with a known flow rate,
steps
 and 6 can be omitted.
▷
The error calculation is based on PTB Testing
Instructions, Volume 29: “Messgeräte für Gas –
Gaszähler” (Measuring instruments for gas – gas
meters), Edition 2003.
Cyclic test with a given volume
Test load and minimum test volumes for the test with
index readout:
Type
Q
max
in
m 3 /h
Cyclic
volume
in dm 3
Test volume in dm 3 at
Q
min
0.2 Q
max
Q
max
BK-G6 10 6 180 360 360
BK-G10 16 6 180 360 360
BK-G16 25 6 180 360 360
BK-G25 40 12 360 720 720
BK-G40 65 18 540 1080 1080
Master meter test procedure
11
8
9 7
10
V
N
 To activate the cyclic test on the unit under test,
briefly press the selection key on the index –
marker 7. The index will thus be “armed” for
measurement.
 Start the test on the master meter – marker 8.
▷
As soon as one of the significant sensor posi-
tions has been detected, the unit changes to
measuring mode – marker 9.
 Test is ended – marker 10.
4 Read off the test results on the unit under test.
▷
The measured values are updated with each 1/8
revolution of the measuring unit.