The Vd84; For Orientation; Delivery Content; Product Description - thyr cont VD84 Betriebsanleitung

2 The VD84

2.1 For Orientation

These operating instructions describe installation and operation of products with
article numbers
VD84.
The article number can be found on the product's type label. Technical modifica-
tions are reserved without prior notification.

2.2 Delivery Content

Included in the delivery consignment are:
VD84
-
- VSP841 or VSP842 Pirani sensor
Protective cover
-
- Operating instructions
Available Accessories:
Protective case, VD8CASE
-
External plug-in power supply 15V, VD8N4
-
AlMn block battery 9V, VD8ALK
-
Windows-Software VacuGraph, VGR
-
Interface cable USB, WUSB0002
-

2.3 Product Description

The VD84 compact vacuum meter is measuring total pressure in the range 100 –
-3
1x10 mbar.
The unit is equipped with a Pirani sensor and temperature compensated. It can
be mounted to suitable flanges. When using a suitable battery, the instrument
can also be operated completely under vacuum.
Pressure is displayed continuously over the whole measurement range.
Due to the integrated data logger functionality it is possible to store up to 2000
measurements in the vacuum meter. By means of the USB interface you can
transmit the stored measurement data to a PC or record measurements online
on PC as well.
Measurement Principle
The VD84 is operated with an external Pirani sensor, which uses the heat
conduction of gases for measuring vacuum. In a bridge circuit the filament is
heated to constant temperature, the necessary bridge voltage is a measure for
total gas pressure.
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