APPENDIX C – APPROVAL INFORMATION
ST51A/ST75A/ST75AV Mass Flow Meters
94
Fluid Components International LLC
Specific Conditions of Use per FM16ATEX0008X
1. The ambient temperature range and applicable temperature class of the sensor probe is based on the maximum process temperature
for the particular application as follows; T6…T1 for T
ambient
of -40 °C to +65 and T
process
of -40 °C to +260 °C. Probe assembly design
temperatures are part number dependent. Low temperature models have design temperatures from -40°C to +121°C. Medium
temperature models have design temperatures from -40 °C to +260 °C.
2. Process Temperature: Maximum process temperature range is -40 °C to +260 °C. Process temperature varies for flow element installed. The
relationship between the temperature class, the maximum surface temperature and the process temperature is as follows:
Sensing Element:
T6 / T85°C for a process temperature range of -40 °C to +39 °C.
T5 / T100°C for a process temperature range of -40 °C to +54 °C.
T4 / T135°C for a process temperature range of -40 °C to +89 °C.
T3 / T200°C for a process temperature range of -40 °C to +154 °C.
T2 / T300°C for a process temperature range of -40 °C to +177 °C.
T1 for a process temperature range of -40 °C to +260 °C.
3. Consult the manufacturer if dimensional information on the flameproof joints is necessary.
4. The painted surfaces of the Mass Flow Meter may store electrostatic charge and become a source of ignition in applications with a
low relative humidity <~30% relative humidity where the painted surface is relatively free of surface contamination such as dirt, dust,
or oil. Guidance on protection against the risk of ignition due to electrostatic discharge can be found in IEC TR60079-32 (in
preparation). Clean painted/unpainted surfaces using a water dampened cloth only.
5. The probe when remotely located from the enclosure has flying lead conductors that requires the remote probe to be connected to a
suitably certified Ex d or Ex e terminal box for connecting to the external supply circuit.
6. Customer to supply wire rated 10 °C minimum above maximum ambient temperature of installation location to a suitably certified Ex d
or Ex e terminal box.
Summary of Contents for ST51A
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