Ambient Temperature / Temperature Classes - Honeywell VERSAFLOW VORTEX 200 Supplementary Instructions Manual

VERSAFLOW VORTEX 200
The marking contains the following information:
II II II II
2 2 2 2
G G G G
D D D D
Ex db Ex db Ex db Ex db
Ex eb Ex eb Ex eb Ex eb
Ex tb Ex tb
Ex tb Ex tb
Ex ia Ex ia
Ex ia Ex ia
Ex [ia] Ex [ia] Ex [ia] Ex [ia]
IIC IIC
IIC IIC
IIIC IIIC IIIC IIIC
T6...T2 T6...T2 T6...T2 T6...T2
T70 T70°C C C C
T70 T70
T70 T70 T70 T70°C...T240 C...T240 C...T240°C C C C C...T240
Gb Gb
Gb Gb
Db Db
Db Db
Table 2-6: Description of the marking

2.6 Ambient temperature / temperature classes

Because of the influence of the temperature of the product, no fixed temperature class is
assigned to vortex flowmeters. The temperature class of these devices is rather a function of the
product temperature and ambient temperature that is present and the specific device version.
The classification is outlined in the following tables.
The tables take into account the following parameters:
• Ambient temperature T
• Product temperature T
• Nominal size DN
• Heat resistance of the connecting cable
34-VF-25-137 iss.1 GLO July 2019 US
Explosion protection, group II
Equipment category 2
Gas explosion protection
Dust ignition protection
Protection type "Flameproof enclosure"
Protection type "Increased safety"
Protection type "Equipment - dust ignition protection by enclosure"
Protection type "Intrinsic safety", protection level "ia" (flow sensor, compact device)
Protection type "Intrinsic safety", protection level "ia" (flow sensor circuit, remote
version)
Gas group, suitable for gas groups IIC, IIB and IIA
Dust group, suitable for groups IIIC, IIIB and IIIA
Temperature class range, suitable for temperature class T1...T6
Maximum surface temperature of the signal converter housing without dust coating at
ambient temperature 65°C / 149°F and product temperature 65°C / 149°F
Maximum surface temperature of the flow sensor housing without dust coating at
ambient temperature 65°C / 149°F (is determined by the product temperature)
EPL, suitable for zone 1 and zone 2
EPL, suitable for zone 21 and zone 22
amb
m
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DEVICE DESCRIPTION
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