EVCO S.p.A.
EVBOX1 | Installation guide ver. 2.0 | Code 144BOX1E204
page 95 of 100
Real time clock:
incorporated (with lithium secondary battery).
Battery autonomy without power supply: 6 months.
Battery recharging time: 24 h (the battery is recharged through
the device power supply).
Drift: ≤ 30 s/month at 25 °C (77 °F).
Data logger battery:
according to the model (nickel-metal hydride secondary battery)
Battery range in absence of power supply: more than 72 h.
Battery charging time: 24 h (the battery is charged by the
power supply of the device).
Analogue inputs
according to model, up to 7 inputs:
-
3 configurable via configuration parameter for PTC,
NTC or Pt 1000 probes (room temperature,
evaporator temperature and evaporation
temperature)
-
1 configurable via configuration parameter for PTC,
NTC or Pt 1000 probes (configurable via
configuration parameter for condenser temperature,
critical temperature, evaporator 2 temperature or
CPT temperature)
-
2 configurable via configuration parameter for NTC
or Pt 1000 probes (auxiliary 2 temperature and
auxiliary 3 temperature)
-
1 for 4-20 mA transducers (vapour pressure).
4-20 mA transducers power supply: 12 VDC (±10 %),
30 mA max.
Analogue inputs PTC (990 @ 25 °C, 77 °F)
Type of sensor:
KTY 81-121.
Measurement field:
from -50 to 150 °C (from -58 to
302 °F).
Precision:
±0,5 % of scale end.
Resolution :
0,1 °C (1 °F).
Protection:
none.
Analogue inputs NTC (10 K @ 25 °C, 77 °F)
Type of sensor:
ß3435.
Measurement field:
from -50 to 120 °C (from -58 to
248 °F).
Precision:
±0,5 % of scale end.
Resolution :
0,1 °C (1 °F).
Protection:
none.
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