The Limit Setup Button - SAES NEG POWER User Manual


Vmax Imax Pmax and Tmax are the target and the maximum values. These values can be
chosen independently from each other. NEG POWER output will increase the voltage until the
first of these limits is reached and will keep that working point for t_hold time. In other words if
one of these parameters (i.e., V, I, P and T) reaches the max set value, the other parameters
will be reduced accordingly.
For example: set
Vmax = 10V Imax = 6A Pmax = 70W and Tmax = 450°C
Let's assume that the working point of the NEG POWER is
V = 10V I = 5A so P = 50W and T = 400°C
NEG POWER stays in this working point because the output has reached Vmax and cannot
exceed it.

Tmax is the temperature target to be set if the pump is equipped with a thermocouple. If the
pump has a thermocouple it is recommended to use it. The pump temperature is very much
related to the system configuration. If your pump isn't equipped with a thermocouple this value
can be decreased until NO TCK appears, which means that NEG POWER is configured to
work without a thermocouple (an alarm is raised if Tmax is set in a pump without a
thermocouple).
5 The start button can now be pressed.
On the left half of the screen, Vout, Iout, Temp and Time On current values are shown.
A Limit Setup button is present in this menu.
4.5.

The Limit Setup button

By pressing Limits Setup button
limit on V, I, P and T. If any parameter reaches its limit, the output is switched off.
M.HIST.0101.23 R2
a subpage is accessed that allows to configure a security
Page 17 of 36
th
January, 26 2021