Technical Manual MIVI 8001
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1.5.2. Modification of the previous calibration
The device has been programmed in order to answer to your needs. These features programming
steps are noticed on the features specification pages at the end of this document.
At first, be sure that the modification is necessary, and not consecutive of a non coherent
comparative information (different measuring conditions, bad standards, inaccurate or wrong
laboratory measurements,…).
To re-calibrate the viscometer, measure several viscosities of standard oils and then, transfer the
values in the table n°2 of the electronic processor. Refer to the User Manual 8001 to know each steps
of a re-calibration.
1.6.
Directives and standards
1.6.1. European Directive ATEX
MIVI sensors are in agreement with 94/9/EC directive (ATEX) for equipments installed in explosive
gas atmospheres or in presence of combustible dust :
II 2G (gas)
II 2D (dust)
Ex d IIC T1 to T6 : gas
Ex tD A21 IP67 T75°C, T90°C, T125°C, T190°C, T290°C, T300°C : dust
Be sure the sensor’s certification is in accordance with the security level required on your process
location : Area classification, equipments group, protection method, gas type, temperature codes…
Area classification and equipments installation rules are detailed into IEC 7910 and EN 60079
standards for gas or EN 61241 standards for dust.
To always keep the maximum security level of the viscometer, don’t open it. Furthermore, we advice
to install the sensor with the cable gland orientated to the floor.
Check periodically information indicated on the sensor’s identification plate are still visible.
1.6.2. Installation in hazardous area
Here are the possible ways to install MIVI sensors in hazardous area.
SAFE AREA
HAZARDOUS AREA
SAFE AREA
HAZARDOUS AREA
(1)
(2)
(3)
(1) : non-exproof connectors
(2) : exproof box
(3) : exproof connection box
Ex
Ex
IMPORTANT : Always connect the sensor's body (screw on the top of the body) to the ground.
