ZVC
Vakuum meter
Technical data
Measuring range:
1.600 – 1 mbar (absolute pressure)
Permissible overload:
4 bar absolute
Measuring accuracy:
Type 0.25% F.S. at 25°C (linearity, hys-
teresis, repeat accuracy)
Resolution:
1 mbar
Ambient temperature:
0 – 30°c
Storage temperature:
-10°C to + 50°C
Power supply:
9 V block battery (alternative NiCd re-
charge-able battery)
Input:
approx. 5 mW (clock-pulsed controlled
measurement)
Battery life:
a) 9 V battery: max. 500 hours continu-
ous measurement
b) 9 V rechargeable battery: approx. 50
hours fully charged
Vacuum connection:
Tube connection
Media contacting parts:
Ceramic (Al2O3); Viton; stainless steel
Display:
LCD 12 mm
Optional:
IR-Interface for data exchange
Function
The VACMASTER digital vacuum meter measures the absolute
pressure within a range of 1 and 1,600 mbar. The pressure is meas-
ured independent of the ambient air pressure.
The vacuum meter indicates pressure digitally on the display ei-
ther in mbar, torr or hPa, optional. Measured values can be stored
during the evacuation process. The last minimum pressure, the last
maximum pressure and up to 5 intermediate values are stored in a
memory (the user can switch off the storage of intermediate val-
ues). The above features make the meter suitable for monitoring,
e.g. vacuum packaging machines.
For this purpose the meter is placed directly in the package or in the vacuum chamber. When intermediate value storage
is switched on (see 4. Parameters) a maximum of five pressure values below a threshold of 800 mbar which are
maintained unchanged for longer than a pre-selected rest period ( adjustable in a range from 3 to 30 sec. ) (within a band
of +1.5% of the actual value, but at least +2 mbar) are successively stored. In the event that a value has been stored
then renewed storage is only possible if pressure values are activated outside the band ± 10 mbar of the last stored value.
The stored values can be displayed consecutively by the display.
Operation
●
Press the MODE key once to switch on the meter and automatically set it in “
AUTO-OFF
” mode (arrow points
downwards on the display). The meter automatically turns itself off after 5 sec. if no key is actuated.
●
Renewed depression of the
MODE key
: Interrogation of the 1
st
stored value
P1
; alternating display of P1 and the
corresponding measured value (meter is automatically returned to “AUTO-OFF” mode after 5 sec. if no key is
depressed)
●
Renewed depression of the
MODE key
: Interrogation of the 2
nd
stored value
P2
●
Renewed depression of the
MODE key
: Interrogation of the 3
rd
stored value
P3
●
Renewed depression of the
MODE key
: Interrogation of the 4
th
stored value
P4
●
Renewed depression of the
MODE key
: Interrogation of the 5
th
stored value
P5
●
Renewed depression of the
MODE key
: Interrogation of the
last maximum value
(arrow points upwards on the
display)
●
Renewed depression of the
MODE key
: Interrogation of the
last minimum value
(arrow points downwards on the
display)
●
Renewed depression of the
MODE key
:
CLR
appears on the display!
Renewed depression of the MODE key deletes the stored values, and the meter is ready for the measuring cycle
(arrow points upwards and downwards on the display).
The meter can then be placed in a vacuum chamber or a container prepared for vacuum packaging.
Warning -
With automatic packaging lines ensure that there is a free clearance of at least 45 mm in the vacuum
chamber.
Danger of destruction.
When packing has been completed the meter will indicate the current pressure (in the vacuum package). As described
above, the stored intermediate values can be called, and the meter can be prepared for the next cycle.
Therefore two key depressions in quick succession while in memory mode are necessary to return to the
AUTO-OFF
mode.
●
The tube connection enables the use of the meter for vacuum measurements in installations and pumps. To avoid
an error of measurement use short tube.
●
When in AUTO-OFF mode the meter is automatically switched off after approx. 20 sec.
Operating Instructions
BE 930
1.4.2002
Werner Rietschle
GmbH + Co. KG
Postfach 1260
79642 SCHOPFHEIM
GERMANY
0 76 22 / 3 92-0
Fax 0 76 22 / 39 23 00
E-Mail: [email protected]
http://www.rietschle.com
Rietschle (UK) Ltd.
Bellingham Way
NEW HYTHE
KENT ME20 6XS
UNITED KINGDOM
0 16 22 / 71 68 16
Fax 0 16 22 / 71 51 15
E-Mail: [email protected]
http://www.rietschle.co.uk
