KROHNE OPTIMASS 2400 - Manual (Page 13)

DEVICE DESCRIPTION
2
13
OPTIMASS 2400
www.krohne.com 07/2014 - 4003533101- MA OPTIMASS 2400 R01 en
If the meter continues to display the message: "Sensor: Sensor signal low" you MUST assume
that the primary seal (tubes) has failed and the appropriate action MUST be taken.
Gases Gases Gases Gases (Example model code: OPTIMASS 2400C S250 - GAS)
Pressure / temperature data: Pressure / temperature data: Pressure / temperature data: Pressure / temperature data:
OPTIMASS 2400 -45°C...+130°C and 500...14000 kPa
Pressures and/or temperatures may be further limited by tube, temperature, connection and Ex
limits. Consult the meter nameplate and relevant documentation for full details.
On all meters operating on gas measurement the casing of the meter is fitted with a burst disc. If
the primary seal (tube/s) fails leakage will occur from the burst disc. Install the meter so that the
burst disc is pointing away from personnel.
Regular maintenance of the burst disc: Regular maintenance of the burst disc: Regular maintenance of the burst disc: Regular maintenance of the burst disc:
Carry out regular maintenance checks on burst discs for leakage and/or blockages. On all
OPTIMASS meters, the primary seal is considered to be the measuring tube of the meter. The
materials of construction of the measuring tube/s are described within the relevant sections of
this handbook and the customer’s product and any other fluid flowing through the tube must be
compatible with the material of construction. If failure of the primary seal is suspected then the
process line should be de-pressurised and the meter removed as soon as it is safe to do so.
Please contact customer service for servicing or replacement of the meter.
2.4 Temperature differential and thermal shock
Temperature differential Temperature differential Temperature differential Temperature differential
The maximum difference between ambient temperature and process (operating) temperature is
100°C / 212°F.
Thermal shock Thermal shock Thermal shock Thermal shock
Thermal shock occurs when there is a sudden and extreme change (shift) in process
temperature. To avoid thermal shock, refer to the following table for the maximum temperature
shift.
Meter Meter Meter Meter Maximum temperature shift Maximum temperature shift Maximum temperature shift Maximum temperature shift
S100 +90°C / +194°F (+110°C / +230°F with a maximum operating pressure of 40 barg / 580 psig)
S150 +80°C / +176°F
S250 +50°C / +122°F
CAUTION!
Operation outside these limits may result in shifts in density and mass flow calibration. Repeated
shocking may also lead to premature failure of the meter! However, higher thermal shocks are
possible at lower working pressures. For more information, please contact your nearest
representative.
MA_OPTIMASS_2400_en_140515_4003533101_R01.book Page 13 Thursday, July 31, 2014 5:08 PM