4: Data Logging & Communications (U4000)
40
U3000/U4000 User Manual
(Issue 2.0)
Note: ALARM 2 can be used instead of ALARM 1. The procedure is identical except that
Alarm 2 Mode
is
selected and the frequency pulse output is connected to and ALARM2-.
4.8.4 Configuring the Calec® ST Energy Totaliser
Two parameters need to be entered to allow operation with the U3000/U4000. These are:
Maximum Input Frequency
The
Maximum Input Frequency
should be the same as that set in the U3000/U4000, i.e. 10Hz or 200Hz.
Volume per pulse (Imp)
The
Volume per pulse
value should be the same as that indicated in the U3000/U4000
Calculated Pulse
Value
.
Both of these values can be entered using the Calec's
Inputs
menu. Refer to the Calec's User Manual for
further details.
Example
Consider the U3000/U4000 configured as follows for a 114mm stainless steel pipe:
Max Pulse Freq. (Hz) = 200Hz
Flow at max Freq = 20.0 l/s
Calculated Pulse Value = 0.1
The U3000/U4000 reads a mean flow rate of 72.08 m3/h.
1.
Select Calec
Inputs
and program as follows:
F = 200Hz
Imp = 0.1
2.
Select Calec
Instant
then scroll to :
T = 36.78°K
P = 3043.344
Q= 72.023
K = 1.149
The calculated value of P is given by:
This verifies the correct U3000/U4000 with the Calec® ST Energy Totaliser.
Δ
P
k
Q
×
Δ
T
×
3043.7
kW
=
=
