Heating - Endress+Hauser Proline Promass 84 MODBUS RS485 Operating Instructions Manual

Installation
"
"
16
Special installation instructions for Promass F
Caution!
If the measuring tube is curved and the unit is installed horizontally, adapt the sensor position to
the fluid properties.
1
Fig. 9: Promass F, installed horizontally
1 Not suitable for fluids with entrained solids. Risk of solids accumulating.
2 Not suitable for outgassing fluids. Risk of air accumulating.
3.2.4

Heating

Some fluids require suitable measures to avoid loss of heat at the sensor. Heating can be electric,
e.g. with heated elements, or by means of hot water or steam pipes made of copper or heating
jackets.
Caution!
• Risk of electronics overheating! Make sure that the maximum permissible ambient temperature
for the transmitter is not exceeded. Consequently, make sure that the adapter between sensor and
transmitter and the connection housing of the remote version always remain free of insulating
material. Note that a certain orientation might be required depending on the fluid temperature
→ ä 14.
• With a fluid temperature between +200 °C to +350 °C (+392 to +662 °F) the remote version of
the high-temperature version is preferable.
• When using electrical heat tracing whose heat is regulated using phase control or by pulse packs,
it cannot be ruled out that the measured values are influenced by magnetic fields which may
occur, (i.e. at values greater than those permitted by the EC standard (Sinus 30 A/m)). In such
cases, the sensor must be magnetically shielded (except for Promass M).
The secondary containment can be shielded with tin plates or electric sheets without privileged
direction (e.g. V330-35A) with the following properties:
– Relative magnetic permeability μ
– Plate thickness d ≥ 0.35 mm (≥ 0.014")
• Information on permissible temperature ranges → ä 107
Special heating jackets which can be ordered as accessories from Endress+Hauser are available for
the sensors.
Proline Promass 84 MODBUS RS485
≥ 300
r
2
a0004581
Endress+Hauser