VACUUBRAND VNC 2 - Manual (Page 12)

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999161 / 27/03/2012
page 12 of 45
* The actual available range of the vacuum control can be limited due to the ultimate vacuum of the
pump, the developed amount of gas, etc.
** if pumping potentially explosive atmospheres: +10°C to +40°C
*** ohm resistive (inductive) load
Technical data
Controller
VNC 2 (E)
(not for
VACUUBRAND
NT VARIO pump or
pumping unit)
VNC 2 VARIO E
(only for connection
to VACUUBRAND
NT VARIO pump or
pumping unit)
Pressure transducer
capacitive, absolute pressure transducer made of
aluminium oxide ceramics, independent of gas type
Display
alphanumeric LCD display, illuminated
2 x 8 characters
Pressure units / scale (selectable) mbar, Torr or hPa
Measuring range (absolute) 1100 mbar - 1 mbar (825 Torr - 1 Torr)
Maximum range of pressure control (absolute)* 1060 mbar – 1 mbar (795 Torr – 1 Torr)
Maximum permissible pressure at pressure
transducer (absolute)
1.5 bar (1125 Torr)
Measurement uncertainty (absolute) after careful
adjustment and at constant temperature
< ±1 mbar (0.75 Torr) ±1 digit
Temperature coefficient < ± 0.07 mbar/K (0.05 Torr/K)
Ambient temperature range (operation) 10°C to +40°C
Ambient temperature range (storage) -10°C to +70°C
Permitted relative atmospheric moisture during
operation (no condensation)
30% to 85%
Maximum permissible temperature of gaseous
media at pressure transducer
continuous operation: 40°C**
for short periods (< 5min) up to 80°C**
Max. permitted range of supply voltage
100 V~ (-10%) to 230
V~ (+10%) 50/60 Hz
24 V DC ±10%
(VACUU•BUS)
Fuse (IEC connection) 5x20 mm, T 8 A / 250 V
Power draw (no-load operation) 3 VA 2 VA
Power draw with VACUUBRAND VV-B 6C in-line
valve and coolant valve VKW-B
max. 10 VA (without
switch output)
-
Serial interface RS 232 C
Supply line VACU•UBUS
voltage supply 110-230 V 50/60 Hz
voltage supply 100-110 V 50/60 Hz
24 V, max. 400 mA
24 V, max. 340 mA
-
designed for the simultaneous operation (parallel
connection) with the following original accesso-
ries:
one in-line valve VV-B 6C 24V=
one coolant valve VKW-B 24 V=
one venting valve VB M-B 24 V=
Breaking capacity of IEC socket***
ambient temperature 30°C
ambient temperature 40°C
7.2(4) A 250 V~ / 7.2(7.2) A 125 V~
6(4) A 250 V~ / 6(6) A 125 V~