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2 6 6 H S H MODBUS TR A N S M IT TE R |
P R E SSU R E/ T EM P ER AT U R E M U LT I VA R I A B L E | O I/ 2 6 6 H SH M T- EN R E V. A
3.2 Range & Span consideration
The 2600T Transmitter Specification Sheets provide all information concerning the Range and Span limits in relation to
the model and the sensor code.
The terminology currently used to define the various parameters is as follows:
URL: Upper Range Limit of a specific sensor. The highest value of the measured value that the transmitter can
be adjusted to measure.
LRL: Lower Range Limit of a specific sensor. The lowest value of the measured value that the transmitter can
be adjusted to measure.
URV: Upper Range Value. The highest value of the measured value to which the transmitter is calibrated.
LRV: Lower Range Value. The lowest value of the measured value to which the transmitter is calibrated.
SPAN: The algebraic difference between the Upper and Lower Range Values. The minimum span is the
minimum value that can be used without degradation of the specified performance.
TD: (or Turn Down Ratio) is the ratio between the maximum span and the calibrated span.
The transmitter can be calibrated with any range between the LRL and the URL with the following limitations:
LRL ≤ LRV ≤ (URL - CAL SPAN)
CAL SPAN ≥ MIN SPAN
URV ≤ URL
4 Opening the box
4.1 Identification
The instrument is identified by the data plates shown in
Figure 2. The certification plate (ref. A): contains the
certification related parameters for use in Hazardous area.
The Nameplate (ref. B), always made of AISI 316 ss, provides
information concerning the model code, maximum working
pressure, range and span limits, power supply, output signal,
diaphragms material, fill fluid, range limit, serial number,
maximum process working pressure (PS) and temperature
(TS).
The Tag plate, instead, provides customer tag number and
calibrated range.
Both certification and tag plates are supplied self-adhesive
attached to the electronics housing, as standard. Option I2
allows to select these plates as metal AISI 316 ss fastened to
the electronics housing with rivets.
The instrument may be used as a pressure accessory
(category III) as defined by the Pressure Equipment Directive
2014/68/EU. In this case, near the CE mark, you will find the
number of the notified body (0474) that have verified the
compliance. 266 pressure transmitters are in compliance
with EMC 2004/108/CE*.
