STK135 pressure transmitter 4 to 20mA HART absolute smart pressure transmitter

Features and Benefits

• Maximum range turndown 100:1
• Backlight LCD display for the dark environment
• Separate electronics and connection compartments
• Housing can be rotated through 330 O
• Excellent stability
• Optionl: Hart or ModbusRTU/RS485

• For application in the process engineering
• Suit for liquids, vapour or gases
• Preferred areas of use are: process engineering chemical industry
• Oil and gas industry

Measuring range (ceramic sensor)
Pressuregauge(kPa)	-2.5...2.5		0...5		0...10	-10...10	0...20	0...40
OverpressurePmax(kPa)	250		-0.075		-0.075	600	600	600
Pressuregauge(kPa)	0...100		-40...100		-100...100	0...200	-100...400
OverpressurePmax(MPa)	1		1		1	1.8	2.5
Pressuregauge(MPa)	-0.1...1		-0.1...2		-0.1...4	-0.1...7
OverpressurePmax(MPa)	4		4		6	10.5
Pressureabs.(kPa)	0...20		0...100		0...200	0...400	0...500
OverpressurePmax(kPa)	0.6		1		1	2.5	2.5
Pressureabs.(MPa)	-0.1...1		-0.1...2		-0.1...4	-0.1...7
OverpressurePmax(MPa)	4		4		6	10.5
Output signal
2-wire-system		4...20mAwithsuperimposedsignalforHARTprotocoldigitalcommunication
3-wire-system(optional)		1...5V
Signalrange-4to20mA		3.8mA...22.8mA
Signalonalarm		3.8mA/22.8mA/Othersonrequest
Electrical protection
Insulationresistance		>250MΩ
Short-Circuitprotection		Permanent
Reversepolarityprotection		Nodamage,andnofunction
Overvoltageprotection		500V
Performance
Accuracy				Nominalrange0.1%
				0.25%accuracyforrangeturndown4:1
				0.5%accuracyforrangeturndown10:1
Powersupplyeffect				Negligible
Vibrationeffect				<0.01%ofURL/gwhentested200Hzinanyaxisrelative
Thermaleffect				±0.05%/10K
Compensatedtemperaturerangeofsensor				-20...80℃
Permissibleload				≤50(V-12)Ω
Stability				0.1%FSO/Year
Switchondelay				5s
Damping				0to100s,step:0.1s
Responsetime				200ms(withoutconsiderationofelectronicdamping)
Selfstabilityconfiguration				0to2%
Filterconfigured				0to160uA
Adjustability				Threepushbuttons
Communicationresistance				Typ.250Ω

Dimensions( mm )

The STK135 can be operated in the following ways:

Using the three keys above the instrument directly at the mounting point

for calibrating zero point and span at the touch of a button.

Or

Operating remotely using the HART protocol

-e.g. via HARTTalker and a PC with the SENSE operating programm HART Tran

Operation of push buttons

The STK135 can be programmed via three buttons.

Following parameters can be adjusted: scaling, decimal point, damping, display model, fix output current, and reset.

HART-commnication via HART-protocol the possibility of setting zero and span value is given.

HART-communicatin, which can run via PC, note-book, PDA, measured values and parameters become transparent and

are available on every step of the signal circuit.

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