Altometer
4
1
Name and address of the manufacturer
2
Name of flowmeter, serial no, manufacturing date
3
Electrical data mains circuit
4
CE sign with identification number(s) of notified body / bodies
5
specific sign for explosion protection
6
Symbols and code letters for explosion safety:
group (II), categories ( 2 or 2(1) ), Gas/Dust (GD), EEx followed by the
code letters for each used type of protection, gas group (IIC) and
temperature classes (normally T6...T3)
7
Warnings relevant for the explosion safety
8
Electrical data of the signal in/outputs
Maximum ambient and process temperatures
The compact flowmeter is suitable for ambient temperature range -40 till +60 °C.
The flowmeter is certified for gas group IIC, temperature classes T6...T3.
The limit for the process (medium) temperature (T
m
) is determined by the
temperature class T6..T3 of the gas hazardous area of concern, the maximum
ambient temperature (T
a
) and the DN size, see following tables.
Note: for ease of reference the several flowmeter variants are simply denoted by the
main EEx type of protection of the primary head, e.g. EEx m for DN10-20 range
instead of the official EEx me.
Maximum medium temperature ( in °C)
Temperature
class
(for gasses)
T
a
=
40°C
40 < T
a
=
50°C
50 < T
a
=
60
°C
T6
70
60
---
T5
95
85
60
T4
130
130
60
T3
150
150
60
Table 1
Maximum medium temperatures for EEx m flowmeters DN10-20
Maximum medium temperature ( in °C)
Temperature
class
(for gasses)
T
a
=
40°C
40 < T
a
=
50°C
50 < T
a
=
60
°C
T6
80
80
80
T5
95
95
80
T4
130
130
80
T3
150
150
80
