4 Options
4.1 VCT (for EHS CFG) – voltage correction by temperature
This option allows a temperature dependent correction of the output voltage. The temperatures are measured with a distinct
sensor for each channel. An user-adjustable VCT-coefficient allows to specify a linear relationship between the measured
temperature and the output voltage. As an option one sensor per module can be
.
4.1.1 Technical data
Sensor type
EPCOS B57867S0502F140
Temperature range
-40 … 80°C
Accuracy of temperature measurement
±0.5 K (0 … 60°C)
Resolution of temperature measurement
1 mK (0 … 60°C)
Temperature update rate
15 updates/min
Table 11: Technical data VCT sensor
4.1.2 Operation
The connector of the temperature sensor must be plugged in the slot of the corresponding channel on the VCT-connector at the
front panel of the HV-module. The direction of the male connector does not matter.
Figure 1: VCT modul
Figure 2: VCT
A programmable VCT-coefficient for each channel defines the rate and the direction of the voltage correction. The temperatures,
measured at the sensors can be read out from the module.
At the time a HV-channel is switched on or the output voltage is set by the user, the module registers the temperature (T
ref
) of the
corresponding sensor and the set voltage as reference values.
If the temperature (T) at the sensor changes, the output voltage is automatically adjusted according to the formula:
V = V
ref
+ a
∙
(T – T
ref
)
(a…VCT-coefficient)
EHS High Voltage Power Supply series | Last changed on: 16.01.2020 |
www.iseg-hv.com
20/42
