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The STX 2100 Series Differential Pressure Transmitter complements the RTX 1000 Series, providing a complete family of Smart gauge, absolute and differential units. The transmitter utilizes a micromachined capacitance silicon sensor with state of the art microprocessor technology to provide exceptional performance and functionality. Features
- Accuracy upto 0.04%
- Ranges from 1mbar to 32 bar
- 100:1 rangeability
- Line Pressure up to 160 bar
- 2-wire 4-20mA with HART® protocol
- Robust Design
- Local zero and span adjustment
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Specification Functional Specifications
| Type: FKC...5 |
Smart, 4 to 20mA DC + Hart® digital signal |
| Service |
Liquid, gas, or vapour |
| Pressure Ranges |
Static Pressures to 160 bar
Span from 1 mbar to 30 bar
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| Over Range Limit |
To maximum static pressure limit |
| Output Signal |
4 to 20mA DC (linear or square root) with digital signal superimposed on the 4 to 20mA signal |
| Power Supply |
Transmitter operates on 10.5V to 45V DC at transmitter terminals
10.5V to 32V DC for the units with optional arrester.
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Hazardous locations
| Authority (Digit 10= ) |
Intrinsic safety |
| ATEX (K) |
Ex II 1 G |
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Ex ia IIC T5 (-40°C ≤ Ta ≤ +50 °C) |
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Ex ia IIC T4 (-40°C ≤ Ta ≤ +70 °C) |
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IP66/67 |
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Entity Parameters: |
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Ui ≤ 28 Vdc, Ii ≤ 94.3 mA, Pi ≤ 0.66 W |
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Ci = 36 nF/26 nF for models with/without Arrester |
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Li = 0.7 mH/0.6 mH for models with/without Analog |
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Indicator |
| Authority (Digit 10= ) |
Type n Nonincendive |
| ATEX (P) |
Ex II 3 G |
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Ex nA II T5 (-40°C ≤ Ta ≤ +70 °C) |
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IP66/67 |
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Electrical ratings |
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Model without arrester: |
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Ui ≤ 45 Vdc, 4-20 mA loop powered, Pi ≤ 1.0125 W |
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Model with arrester: |
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Ui ≤ 32 Vdc, 4-20 mA loop powered, Pi ≤ 1.0125 W |
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Optional Analog indicator is not available for type “n� |
| Authority (Digit 10= ) |
Flameproof |
| ATEX (X) |
Ex II 2 GD |
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Ex d IIC T6 (-40°C ≤ Ta ≤ +65 °C) |
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Ex d IIC T5 (-40°C ≤ Ta ≤ +85 °C) |
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Ex tD A21 IP66/67 T 85°C |
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Ex tD A21 IP66/67 T 100°C |
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Electrical ratings |
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Model without arrester: |
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Ui ≤ 45 Vdc, 4-20 mA loop powered, Pi ≤ 1.0125 W |
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Model with arrester: |
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Ui ≤ 32 Vdc, 4-20 mA loop powered, Pi ≤ 1.0125 W/td> |
| Zero/Span Adjustment |
Zero and span are adjustable externally from the adjustment screw (span adjustment is not available with 9th digit code “L, P, M, Q, S, N�). |
| Damping |
The time constant is adjustable between 0 to 32 seconds. |
| Zero Elevation/Suppression |
-100% to +100% of URL |
| Normal/Reverse Action |
Selectable |
| Indication |
Analog indicator or 5-digit LCD meter, as specified. |
| Burnout Direction |
If self-diagnostic detects transmitter failure, the analog signal will be driven to either “Output Hold�, “Output Overscale� or “Output Underscale� modes.
“Output Hold�:
Output signal is held as the value just before failure happens.
“Output Overscale�:
Adjustable within the range 20.0mA to 22.5mA
“Output Underscale�:
Adjustable within the range 3.2mA to 4.0mA
Output limits conforming to NAMUR NE43 by order.
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| Loop-check output |
Transmitter can be configured to provide a constant signal between 3.2mA and 22.5mA. |
| Temperature Limit |
Ambient: -40 to +85°C
(-20 to +80°C for LCD indicator)
(-40 to +60°C for arrester option)
(-10 to +60°C for fluorinated oil filled transmitters)
Ambient and process temperature restrictions apply to versions approved for use in hazardous locations.
Process: -40 to +120°C for silicone fill sensor -20 to +80°C for fluorinated oil fill sensor
Storage: -40 to +90°C |
| Humidity Limit |
0 to 100% RH |
| Local Configurator with LCD display (Option) |
Local configurator with 3 push button and LCD display. |
| Programmable Output linearization Function |
Output signal can be characterized with “14 points linear approximation function�. |
| Reference conditions, silicone oil fill, 316L SS isolating diaphragms, 4 to 20mA analog output in linear mode. |
| Accuracy Rating |
(including linearity, hysteresis, and repeatability) |
| Max span above 320 mbar model: |
For spans greater than 1/10 of URL: ±0.065% of span or ±0.04% of span (optional) For spans below 1/10 of URL: |
| Max span 10 mbar, 60 mbar model: |
For spans greater than 1/10 of
URL: ±0.1% of span For spans below 1/10 of
URL: ( 0 .1 X U R L ) Span ± 0.05+0.05 % of span |
| Stability |
±0.1% of upper range limit (URL) for 10 years for 6th digit code 3, 5, 6, 8. |
| Temperature Effect |
Effects per 28°C change between the limits of -40°C and +85°C |
| Range code (6th digit in Code symbols) |
Zero shift |
Total effect |
“1�/10mbar
“2�/60mbar |
±(0.125 + 0.1 * URL/Span )% |
±( 0.15 + 0.1 * URL/Span)% |
“3�/320mbar
“5�/1300mbar
“6�/5000mbar
“8�/30000mbar |
±( 0.075 + 0.0125 * URL/Span)% |
±( 0.095 + 0.0125 * URL/Span)% |
Double the effects for material code (7th digit in codes symbols) “H�, “M�, “T�, “B�, “L� and “U�
| Static pressure effect |
| Static pressure code (5th digit in Code symbols) |
Zero shift (% of URL) |
“1�/10mbar sensor
“2�/60mbar sensor |
±0.2%/2bar
±0.2%/32bar |
“2�
“3�
“4� |
±0.035%/69 bar |
Double the effects for material code (7th digit in codes symbols) “H�, “M�, “T�, “B�, “L� and “U�
| Overrange effect |
| Static pressure code (5th digit in Code symbols) |
Zero shift (% of URL) |
“1�/10mbar sensor
“2�/60mbar sensor
“2�
“3�
“3� |
±0.3% /2bar
±0.1% /32bar
±0.1% /100bar
±0.1% /160bar FKC35,36,38
±0.15% /160bar FKC33 |
Double the effects for material code (7th digit in codes symbols) “H�, “M�, “T�, “B�, “L� and “U�
| Supply Voltage Effect |
Less than 0.005% of calibrated span per 1V |
| Update Rate |
60 msec |
Response Time
(at 63.2% of output signal)
Range code
(6th digit in code symbols) |
Time constant (at 23°C) |
Dead time |
| “1� |
0.33 s |
0.12 s |
| “2� |
0.3 s |
| “3“ |
0.12 s |
| “5� through “8� |
0.08 s |
| Response time = time constant + dead time |
| Mounting Position Effect |
Zero shift, less than 1.2 mbar for a 10° tilt in any plane.
No effect on span.
This error can be corrected by adjusting Zero. |
| Vibration Effect |
> ±0,25% of span for spans greater than 1/10 of URL.
Frequency 10 to 150Hz, acceleration 39.2m/sec2 . |
| Dielectric Strength |
500V AC, 50/60Hz 1 min., between circuit and earth. |
| Insulation Resistance |
More than 100MΩ at 500V DC. |
| Internal Resistance for External Field Indicator |
12Ω max. (connected to test terminal CK+ and CK-) |
Performance Specifications for Square Root Output
| Accuracy rating Output Span |
| Output |
Span |
|
over 0.1 Ã URL |
below 0.1 Ã URL |
| 50 to 100% |
±0.065 % |
±(0.015+0.05 Ã 0.1 Ã URL/Span)% |
| 20 to 50% |
±0.163 % |
±2.5 Ã (0.015+0.05 Ã 0.1 Ã URL/Span)% |
| 10 to 20% |
±0.325 % |
±5 Ã (0.015+0.05 Ã 0.1 Ã URL/Span)% |
| Max span 10mbar, 60mbar model |
| Output |
Accuracy |
| 50 to 100% |
±0.1 % |
| 20 to 50% |
±0.25% |
| 10 to 20% |
±0.5 % |
| Temperature Effect |
Effects per 28°C change between the limits of -40°C and +85°C |
| Range code |
Shift at 20% output point |
| “1� and “2� |
±( 0 .3 7 5 + 0 .2 5 *URL/Span)%/28°C |
| “3� through “9� |
± ( 0.24 +0.03125 *URL/Span) %/28°C |
| Low Flow Cut-off |
Customer configurable for any point between 0 to 20% of output |
Physical Specifications
| Electrical Connections |
1/2-14 NPT, Pg13.5 or M20Ãâ€â€1.5 |
| Process Connections |
1/4-18 NPT on 54mm centers, as specified.
Meets DIN 19213.
option: 1/2NPT for oval flanges |
| Process-wetted parts material |
| Material code (7th digit in Code symbols) |
Process cover |
Diaphragm |
Wetted sensor body |
Vent/drain |
| V |
316L SS(*1) |
316L SS |
316 SS |
316 SS |
| W |
316L SS(*1) |
Hastelloy-C |
316 SS |
316 SS |
| H |
316L SS(*1) |
Hastelloy-C |
Hastelloy-C
lining
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316 SS |
| J |
316L SS(*1) |
316L SS + Gold coating |
316SS |
316 SS |
| M |
316L SS(*1) |
Monel |
Monel lining |
316 SS |
| T |
316L SS(*1) |
Tantalum |
Tantalum
lining
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316 SS |
| B |
Hastelloy-C
lining
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Hastelloy-C |
Hastelloy-C
lining
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Hastelloy-C
lining
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| L |
Monel
lining
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Monel
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Monel
lining
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Monel
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| U |
Tantalum lining |
Tantalum |
Tantalum
lining |
Hastelloy-C |
Notes: *(1) ASTM CF8M Remark: Sensor gasket: Viton o-ring or PTFE square section gasket. Availability of above material design depends on ranges and static pressure. Refer to “Code symbols�.
| Non-Wetted Parts Material |
Electronics housing:
Low copper die-cast aluminum alloy finished with
polyester coating (standard), or 316 stainless steel, as
specified.
Bolts and nuts:
• Cr-Mo alloy (standard) up to 160 bar,
316 stainless steel for static pressure up to 100 bar max.
SS630 or SS660 for static pressure > 100 bar.
Fill fluid:
Silicone oil (standard) or fluorinated oil
Mounting bracket:
304 stainless steel |
| Environmental Protection |
IEC IP67 and NEMA 6/6P |
| Mounting |
Without mounting bracket: direct mounting on manifold
(optional)
With optional mounting bracket: for 50mm (2�) pipe or
direct wall mounting. |
| Mass {Weight} |
Transmitter approximately 3.1 to 3.6kg without options.
Add; 0.5kg for mounting bracket
4.5kg for stainless steel housing (option) |
Optional Features
| Indicator |
A plug-in analog indicator (2.5% accuracy).
An optional 5-digit LCD meter with engineering unit is also available.
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| Local Configurator with LCD Display |
An optional 5 digits LCD meter with 3 push buttons |
| Arrester |
An optional 5-digit LCD meter with engineering unit is also available. |
| Oxygen Service |
Special cleaning procedures are followed throughout the process to maintain all process wetted parts oil free.
The fill fluid is fluorinated oil. |
| Chlorine Service |
The fill fluid is fluorinated oil. |
| Degreasing |
Process-wetted parts are cleaned, but the fill fluid is standard silicone oil. Not for use on oxygen or chlorine measurement. |
| NACE Specification |
Metallic materials for all pressure boundary parts comply with NACE MR-01-75. 630/304 or 660/660 stainless steel bolts and nuts comply with NACE. |
| Optional Tag Plate |
An extra stainless steel tag with customer tag data is wired to the transmitter. |
| Vacuum Service |
Special silicone oil and filling procedure are applied.
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Code Symbols STX 2100
Notes*:
1. Not Used
2. Turn down of 100 : 1 is possible, but it should be used at a span greater than 1/40 of the maximum span for better performance.
3. Max. static pressure 100 bar for SS 316 bolts/nuts; for static pressure > 100 bar, please specify SS 630 or SS 660 bolts
4. Gold coating on wetted measuring cell parts for Hydrogen service - Hydroseal version - gold/ceramic coating is available upon request.
5. Process cover with lining has only side vent-drain facility
6. Process cover with PVDF insert with 1/2-18 NPT side process connection/ no vent drain, other upon request - square section PTFE gasket
7. When no code can be found in the current code symbols, place* in concerned code digit(s) and add* in 16th digit
8. Our stainless steel bolts/nuts in SS630 and SS660 are in conformity with the NACE requirements and must be used for NACE service
9. Not Used
10. Process connection on the bottom side.
11. Not Used
12. Pressure > 160 bar not used
13. SS660 bolts/nuts have to be used for oil & gas applications
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