KINTECH ENGINEERING
ORBIT 360 | USER GUIDE
54
The analog input channels are equipped with varistor and diode overvoltage protection
for short duration electrostatic discharges typically arriving from lightning strikes. The
effectiveness of the protection is extremely sensitive to the grounding conditions (refer
to sections 4.3.5 and 6.3).
Following the protections, a low pass filter attenuates noise interference like those
typically coming from electrical lines, RF antennas or other instruments. It is critical to
use shielded cables with the shield properly connected at one end.
In order to reduce the data logger power consumption, the power supply of internal
electronics and power supply terminals is switched off immediately after the readings.
Consequently, the input impedance on the analog input terminals is low while the
electronics are powered off. User should employ available standard sensors with wiring
guidelines to assure appropriate impedance coupling, wiring and power supply of data
logger and sensor. Power supply is applied around 30ms before starting the readings of
analog input channels.
Remark:
Due to the data logger discontinuous power supply of the internal electronics
and supply terminals, external voltmeter readings could show wrong readings.
Set mode 2 temporarily to activate continuous supply and be able to check
voltage on logger terminal with a voltmeter.
The number of physical channels available on each logger depends on the commercial
model chosen. The following table is a summary of the analog channel characteristics:
Property / Description
Specification
Comments
Number of physical channels
15
Basic Plus
15
Premium
