Kobold Heinrichs HPC Series, Supplementary Operating Manual

Page: 8 / 20

Heinrichs Messtechnik GmbH
Page 8 of 20 EX-Supplementary Operating Manual
HPC Mass Flow Meter
4 Specifications
4.1 Description of the HPC Mass-Flow Sensor
The HPC sensor has an “Intrinsic safety” type of protection and is equipped with the following four
independent potential-free and isolated circuits:

Excitation circuit

Sensor circuit 1
 Sensor circuit 2

Temperature sensor circuit (RTD)
All circuits have safe separation from one another within the sensor
The transmitter shall be connected to the sensor using a dedicated cable specially designed for this purpose.
Such a cable can be purchased from Heinrichs Messtechnik during your order process.
4.2 Device identification
The rating plates on Heinrichs Messtechnik flow meters that are suitable for use in potentially explosive
atmospheres are labelled accordingly. Since the sensor and transmitter are separately certified, each device
has its own rating plate.
The HPC rating plates contain all the information necessary to identify the sensor, and for determining it’s
suitability for a potential explosive atmosphere.
Image 1: HPC for process temperatures ranging from – 40 °C to 80 °C.
Image 2: HPC for process temperatures ranging from – 40 °C to 180 °C