For these ranges the limits of the recommended span are
not 7%-120%(of the nominal span) but 30%-120%. Therefore
the model E span will be included between 0.18 and 0.72 bar,
the model F span between 0.48 and 1.92 bar(to remain in the
declared accuracy)
GENERAL
Series TP-26S transmitters, complete with diaphragm in SUS
316, measure relative pressure and level in measuring spans
between 0.042 and 1000㎏/㎠. The pressure measuring
element is a piezoresistive sensor. It is possible to choose
between sensors to satisfy the process conditions.
Span, Zero, Damping and other adjustments are made by a
Hand-Held Terminal. This terminal can be connected in
parallel to The transmitter at any point of the analog signal
wire circuit. That means that the transmitter can be adjusted
from the field or from the control room or an intermediate
junction box.
The sensor, protected from the process fluid by a diaphragm,
generates a signal corresponding to the actual pressure and it
is complete with a PTC thermistor which also transmits the
temperature of the measuring cell to the electronic system.
On the basis of these two values and of the configured
parameters the electronic system generates a standard output
signal (4 to 20mA, two wires system) and displays all the
necessary data on the LED display. The operating parameters
can be changed by means of the four pushbuttons that are
below the LED display.
Among the relevant characteristics of this microprocessor
based transmitter, are the following:
-wide rangeability for the measuring span (abt. 1 to 17)
-automatic temperature compensation in the measuring cell
REF.
NOM. RANGE
㎏/㎠
min./max.
㎏/㎠
RANGE LIMITS
min. (㎏/㎠) max.
OVERPRESS.
㎏/㎠
E* 0 / 0.6 0.042-0.72 -0.6 / 0.6 6
F* 0 / 1.6 0.112-1.92 -1 / 1.6 10
G 0 / 4 0.28-4.8 -1 / 4 16
H 0 / 10 0.7-11 -1 / 10 30
K 0 / 25 1.75-26 -1 / 25 75
L 0 / 60 4.2-61 -1 / 60 100
M 0 / 160 11.2-161 -1 / 160 250
N 0 / 400 28-401 -1 / 400 600
O 0 / 1000 70-1100 -1 /
Measuring range and span limits
General
Specifications Model TP-26S
Smart Type Pressure Transmitter
GT-321
12 - 99
(Intelligent Transmitter)
FUNCTIONAL DATA
With reference to the following, please note these
definitions:
Nominal range:(referred to the sensor mounted on the
instrument) the pressure range (included between a
minimum and a maximum values) to measure which the
sensor has been designed.
Nominal span: the pressure interval between the minimum
ａnd maximum values of the sensor nominal range. The
span is a number.
Measuring range: the pressure range between minimum
ａnd maximum for which the transmitter has been calibrated.
Measuring span: the pressure interval between minimum
ａnd maximum values of the measuring range.
Input scale initial value or zero input: minimum pressure
value included in the measuring range.
Input full scale value: maximum pressure value included in
the measuring range.
1) Transmitter Parameters.
The parameters that are available for display and setting
are:
Measuring Span: possibility to change by 0.05% steps from
120% to 7% of the nominal span. (see table).
Zero Adjustment: by 0.1% steps from -9.9% to +9.9% of
measuring span
Span Adjustment: by 0.1% steps from -9.9% to +9.9% of
measuring span
Suppression/Elevation: by 0.05% steps of nominal span
from 0 to 99% for elevation and from 0 to 93% for
suppression
Damping : adjustable by 1 sec steps from 0 to 15 sec.
Reverse Output : obtained via software
Measuring Units : for the measuring span display, one of
the following units may be selected:
mbar, bar-kPa, MPa-mmH20, mH2O,㎏/㎠.

Physical Characteristics.
Power supply : 12.35 - 30 Vdc with no load
Supply voltage to permissible load relation:
0/250 Ohm for 17.35 Vdc
0/582.5 Ohm for 24 Vdc
0/882.5 Ohm for 30 Vdc
Output signal : 4 -20mA, 2 wires
Overpressure limits :see table
Settling time : 150ms (at 27℃)
ENVIRONMENT AND CONDITIONS
Temperature
Process fluid : -20 ~ + 90℃
Housing : -20 ~ + 80℃
Handling and storage : -20 ~ + 90℃
Relative Humidity : 0 ~ 99% R.H.
LCD display reading : -10 ~ + 65℃
Performance
Unless otherwise stated performance specifications are given at
following conditions: ambient temperature = 20℃, silicone oil
filling, max span.
Unless otherwise stated, all errors are given as percentages of
max span.
Accuracy rating: it is assured within the following limits
Non linearity : resettable with 0.1% accuracy
Repeatability : ≤ 0.10%
Hysteresis : ≤ 0.10%
Dead bａnd : negligible
OPERATING INFLUENCES
Thermal drift: It is referred to -10 ~ + 65℃ range.
Zero: ±0.1%/10。K. Span: ±0.1%/10。K at nominal range.
Power supply effect :
Negligible between 12.35 and 30 V d.c.
PHYSICAL SPECIFICATIONS
Process wetted parts : SUS 316 SS
Housing : die cast aluminium alloy AL UNI 4514 finished with
epoxy resin (RAL 5014).
Filling fluid : silicon oil.
Nameplate : stainless steel, fixed on housing

Calibration
Standard: at nominal range, direct action, transmitter
mode.
Optional: at the conditions specified with the order.
Environmental protection: the transmitter is dust and sand
tight and protected against sea waves effects as defined by
IEC IP 66. Suitable for tropical climate operation as defined
in DIN 50.015.
Process connections: See table 1
Electrical connections : two cable entries on electronic
housing, 1/2" NPT and cable glａnd PG 13.5 for 7 to 12mm
diameter cable.
Terminal board : 2 terminals for signal wiring up to 1.5 mm
(14 AWG). Connection for ground and cable shield.
Mounting position : any position.
Net weight : 1.4 Kg approx.
Options
Bracket: for 2 inch pipe mounting.
Degreesing for oxygen service.
EXPLOSION PROTECTION
Classification.
Type: intrinsic safety Ex ia IIC T6, T5, T4.
Max Amb. temp.: 40℃ for T6, 55℃ for T5, 80℃ for T4.
Power supply conditions :
Condition A
No-load voltage: ≤30 V d.c.
Short circuit current: ≤120 mA.
Max transferred power: 0.75 W.
Condition B
No-load voltage: ≤25.2 V d.c.
Short circuit current: ≤152 mA.
Max transferred power: 0.95 W.
Note
Explosion proof feature
(Exd 〔ia〕 IIC T6) with the
application of barrier