t.
01923 232335
www.hrshevac.co.uk
31 of 48
HRS Hevac Ltd AquaModule AMB
Installation, Operating & Instruction Manual
8.5
Trending parameters
A lot of different variables can be recorded or trended.
It can be temperatures’ measurement, valves
or pumps’ signals, ipsothermic contacts, alarms, thermal treatments etc.
1.
Press
key to access to Service Menu, then click on
“Continue.
2.
Select “Trending” in the menu
3.
Select “Points in Trend”.
The first time you enter this menu, the list is empty.
4.
To add a variable to trend; choose
.
5.
Mark the variable to follow and press the wheel.
In this example the Secondary outlet temperature, S1.
6.
Validate the variable by ticking in the Trend Log box. If this
box is empty the variable is in the list but it is not record.
There are two different ways to record:
a) Only the temperature change is recorded. This saves
memory and allows a longer sampling period compared to
method 2.
Select the record hysteresis. In our case, every 1°C
temperature change is recorded. You can change the
hysteresis value by clicking on it.
b) Record on a time base, whatever the temperature changes
or not. Note that this method consumes memory, especially
if a short time base is selected. Here is the time base
selected to 10 minutes recording (1 record every 10
minutes).
For method
a
set “Trend cycle” to zero, for method
b
, set “Trend
Hyst” to zero.
