Honeywell STA822, STA840, STA87L Technical Information

SmartLine

Technical Information

STA800 SmartLine Absolute Pressure

Specification 34-ST-03-85, Jan 2021

Introduction

Part of the SmartLine® family of products, the STA800 and STA80L are high performance absolute pressure transmitters featuring piezoresistive sensor technology combining pressure sensing with on chip temperature compensation capabilities providing high accuracy, stability and performance over a wide range of application pressures and temperatures. The SmartLine family is also fully tested and compliant with Experion® PKS providing the highest level of compatibility assurance and integration capabilities. SmartLine easily meets the most demanding application needs for pressure measurement applications..

Best in Class Features:

Accuracies up to 0.0375% of span standard & 0.025% of span optional

Stability up to 0.01% of URL per year for 15 years

Automatic temperature compensation

Rangeability up to 100:1

Response times as fast as 80ms

Multiple local display capabilities

External zero, span, & configuration capability

Polarity insensitive electrical connections

Comprehensive on-board diagnostic capabilities

Integral Dual Seal design for highest safety based on ANSI/NFPA 70-202 and ANSI/ISA 12.27.2

Full compliance to SIL 2/3 requirements

Modular design characteristics

Available with additional 15-year warranty

Plugged Impulse Line Detection Option

Dual/Triple Calibration Option (HART & Fieldbus Only)

Figure 1 – STA800 Absolute Pressure Transmitters feature field-proven piezoresistive sensor technology

Communications/Output Options:

4-20mA dc

Honeywell Digitally Enhanced (DE)

HART ® (version 7.0)

FOUNDATION™ Fieldbus

All transmitters are available with the above listed communications protocols.

Span & Range Limits:

				URL			LRL	Min Span
	Model			mmHgA			mmHgA	mm HgA
				(mbarA)			(mbarA)	(mbarA)
STA822/82L			780 (1040)				0 (0)	50 (65)
	Model			psia			psi (barA)	psi (barA)
				(barA)
STA840/84L			500		(35)		0 (0)	5 (.35)
STA87L			3000		(210)		0 (0)	30 (2.1)

2	STA800 Smart Pressure Transmitter

Description

The SmartLine family of gauge pressure, differential pressure, and absolute pressure transmitters is designed around a high performance piezo-resistive sensor. This one sensor actually integrates multiple sensors linking process pressure measurement with on-board static pressure (DP Models) and temperature compensation measurements resulting in the best total performance available. This level of performance allows the ST 800 to replace virtually any competitive transmitter available today. (√)

Unique Indication/Display Options

The ST 800 modular design accommodates a basic alphanumeric LCD display or a unique advanced graphics LCD display with many unparalleled features.

Basic Alphanumeric LCD Display Features

Modular (may be added or removed in the field)

0, 90,180, & 270 degree position adjustments

Configurable (HART only) and standard (Pa, KPa, MPa, KGcm2, Torr, ATM, inH2O, mH2O, bar, mbar, inH2O, inHG, FTH2O, mmH2O, mm HG, & psi) measurement units

2 Lines 16 Characters (4.13H x 1.83W mm)

Square root output indication

Advanced Graphics LCD Display Features

Modular (may be added or removed in the field)

0, 90, 180, & 270 degree position adjustments

Standard and custom measurement units available.

Up to eight display screens with 3 formats are possible

(Large PV with Bar Graph or PV with Trend Graph)

Configurable screen rotation timing (1 to 30 sec)

Display Square Root capabilities may be set separately from the 4-20mA dc output signal

Unique “Health Watch” indication provides instant visibility of diagnostics

Multiple language capability. (EN, GE, FR, IT, SP, RU, TR, CN and JP)

Diagnostics

SmartLine transmitters all offer digitally accessible diagnostics which aid in providing advanced warning of possible failure events minimizing unplanned shutdowns, providing lower overall operational costs

Configuration Tools

Integral Three Button Configuration Option

Suitable for all electrical and environmental requirements, SmartLine offer the ability to configure the transmitter and display via three externally accessible buttons when either display option is selected. Zero/span capabilities are also optionally available via these buttons with or without selection of a display option.

Hand Held Configuration

SmartLine transmitters feature two-way communication and configuration capability between the operator and the transmitter. All Honeywell transmitters are designed and tested for compliance with the offered communication protocols and are designed to operate with any Standards compliant handheld configuration device.

Personal Computer Configuration

Honeywell’s SCT 3000 Configuration Toolkit provides an easy way to configure Digitally Enhanced (DE) instruments using a personal computer as the configuration interface. Field Device Manager (FDM) Software and FDM Express are also available for managing HART & Fieldbus device configurations.

System Integration

SmartLine communications protocols all meet the most current published standards for HART/DE/Fieldbus.

Integration with Honeywell’s Experion PKS offers the following unique advantages.

o Transmitter messaging

o Maintenance mode indication o Tamper reporting

o FDM Plant Area Views with Health summaries o All ST 800 units are Experion tested to provide the highest level of compatibility assurance

STA800 Smart Pressure Transmitter	3

Modular Design

To help contain maintenance & inventory costs, all ST 800 transmitters are modular in design supporting the user’s ability to replace meter bodies, add indicators or change electronic modules without affecting overall performance or approval body certifications. Each meter body is uniquely characterized to provide in-tolerance performance over a wide range of application variations in temperature and pressure and due to the Honeywell advanced interface, electronic modules may be swapped with any electronics module without losing in-tolerance performance characteristics.

Modular Features

Meter body replacement

Exchange/replace electronics/comms modules*

Add or remove integral indicators*

Add or remove lightning protection (terminal connection)*

*Field replaceable in all electrical environments (including IS) except flameproof without violating agency approvals.

With no performance effects, Honeywell’s unique modularity results in lower inventory needs and lower overall operating costs.

Plugged Impulse Line Detection:

STA800 models are offered with a PILD option which provides indication of a plugged impulse line or process connection. When used in conjunction with a basic or advanced display, a non-critical diagnostic indication appears on the integral display. For units without an integral display, an indication can be seen via the host or hand held device when HART Protocol is utilized.

Dual/Triple Calibration:

STA800 models are optionally offered with multiple calibrations. In lieu of a standard factory calibration, units can be supplied with 1, 2, or 3 customer specified calibrations. These calibrations are stored in the meter body and provide users with factory calibrated performance at up to three different calibrated ranges. This increases application flexibility without requiring any costly recalibration or additional inventory.

Performance Specifications

Reference Accuracy:(conformance to +/-3 Sigma)

Table 1

				Maximum		Stability		Reference
						(% URL/		Accuracy1,2
Model	URL	LRL	Min Span	Turndown
						Year for 15		% Span
				Ratio		years)		Std/Opt.
STA822	780 mmHgA	0.0 mmHgA (0.0 mbarA)	50 mmHgA (65 mbarA)	15:1		0.010
	(1040 mbarA)							0.0375/0.025
STA840 500 psia (35 barA)		0.0 mmHgA (0.0 mbarA)	5 psia (0.35 barA)	100:1
STA82L	780 mmHgA	0.0 mmHgA (0.0 mbarA)	50 mmHgA (65 mbarA)	15:1		0.015		0.0375
	(1040 mbarA)
STA84L	500 psia (35 barA)	0.0 mmHgA (0.0 mbarA)	5 psia (0.35 barA)	100:1		0.010		0.0375/0.025
STA87L	3000 psi (210 barA)	0.0 mmHgA (0.0 mbarA)	30 psia (2.1 barA)	100:1

Zero and span may be set anywhere within the listed (URL/LRL) range limits.

4	STA800 Smart Pressure Transmitter

Performance Specifications

Accuracy at Specified Span and Temperature: (Combined Zero & Span, conformance to +/-3 Sigma)

Table 2

Accuracy1,2

Combined Zero & Span

Temperature Effect

(% of Span)

(% Span/ 28oC (50oF))

Reference

C

Model

URL

A

B

(see URL

D

E

Turndown

units)

780 mmHgA

8.7:1

90 (120)

0.050

0.040

<![if ! IE]> <![endif]>Accuracy

STA822

(1040 mbarA)

780 mmHgA

500 psia

25:1

20 (1.4)

0.025

0.005

STA840

(35 barA)

<![if ! IE]> <![endif]>Standard

STA82L

(1040 mbarA)

5.6:1

0.005

0.0325

140 (187)

0.050

0.080

500 psia

25:1

20 (1.4)

0.025

0.007

STA84L

(35 barA)

3000 psi (210

10:1

300 (21)

0.025

0.007

STA87L

barA)

<![if ! IE]> <![endif]>Option

780 mmHgA

8.7:1

90 (120)

0.050

0.040

STA822

(1040 mbarA)

<![if ! IE]> <![endif]>Accuracy

500 psia

25:1

20 (1.4)

0.025

0.005

STA840

(35 barA)

0.005

0.0200

500 psia

25:1

20 (1.4)

0.007

STA84L

(35 barA)

0.025

<![if ! IE]> <![endif]>High

3000 psi

10:1

300 (21)

0.007

STA87L

(210 barA)

Turn Down Effect

Temp Effect

±[ + ]

≥

± [ + (

)]

± [ + (

)]

<

Total Performance (% of Span):

Total Performance Calculation: = +/- √ (Accuracy)2 + (Temperature Effect)2

Total Performance Examples (for comparison): standard accuracy 5:1 Turndown, +/-50 oF (28oC) shift

STA822 @ 156 mmHgA: 0.253% of span	STA82L @ 156 mmHgA: 0.451% of span
STA840 @ 100 psia: 0.063% of span	STA84L @ 100 psia: 0.071% of span
	STA87L @ 600 psia: 0.071% of span

Typical Calibration Frequency:

Calibration verification is recommended every four (4) years.

Notes:

1.Terminal Based Accuracy - Includes combined effects of linearity, hysteresis, and repeatability. Analog output adds 0 .005% of span.

2.For zero based spans and reference conditions of: 25 oC (77oF), 10 to 55% RH, and 316 Stainless Steel barrier diaphragm.

STA800 Smart Pressure Transmitter	5

Operating Conditions – All Models

Parameter		Reference		Rated Condition			Operative Limits		Transportation and
		Condition							Storage
		C	F	C		F	C	F	C	F
Ambient Temperature1		25±1	77±2	-40 to 85		-40 to 185	-40 to 85	-40 to 185	-55 to 120	-67 to 248
Meter Body Temperature2
STA822/STA82L		25±1	77±2	See Figure 2			See Figure 2		-55 to 125	-67 to 257
STA840, 84L, 87L		25±1	77±2	-40 to 110		-40 to 230	-40 to 125	-40 to 257	-55 to 125	-67 to 257
Humidity	%RH	10 to 55		0 to 100			0 to 100		0 to 100
Vacuum Region - Minimum		See Figure 2.
Pressure		Operate within specifications above 25 mmHgA (33 mbarA). Short term3 exposure to full
STA822, 82L, 840,84L, 87L		vacuum will not result in damage.
Supply Voltage, Current,		10.8 to 42.4 Vdc at terminals (IS versions limited to 30 Vdc)
and Load Resistance		0 to 1,440 ohms (as shown in Figure 3)
(HART & DE)
Maximum Allowable		STA822, 82L = 780 mmHgA, 1,040 mbarA
Working Pressure		STA840, 84L = 500 psia, 35 barA
(MAWP) 4, 5
		STA87L = 3,000 psia, 210 barA

1LCD Display operating temperature -20 C to +70 C Storage temperature -30 C to 80 C.

2Silicone 704 minimum temperature rating is 0oC (32oF). CTFE minimum temperature rating is -30 C (-22 F).

3Short term equals 2 hours at 70 C (158 F)

4Units can withstand overpressure of 1.5 x MAWP without damage

5Consult factory for MAWP of ST 700 transmitters with CRN approval

6	STA800 Smart Pressure Transmitter

1000		] [
	9
		] [	Operative
	8
	7		Limit
	6
	5
	4		Rated Operating Area
	3
	2		Silicone Oil
			200®
100
	9
	8		CTFE
	7
	6
Measured	5
Pressure	4
mmHgA	3
25 mmHgA	2
(33.3 mbarA)			Silicone Oil
			704®
	10
	9
	8
	7
	6
	5
	4
			LEGEND:
	3

2													Rated operating area
													Contact Marketing
													Applications for "special"
1.0				] [									quote.
9
8
7
6
5
4						NOTE: Short term exposure (2 hours at
3							70°C/158°F) to hard vacuum will not
2							result in damage.
0.1				] [
-40		-30	-20	0 40	50		60	70	80			90		100	110	120	ºC
-40		-22	-4	32 104	122		140	158	176			194		212	230	248	ºF

Meter Body Temperature

23065

Figure 2 - Measured pressure versus meter body temperature chart for STA722, 72L

Figure 3 - Supply voltage and loop resistance chart & calculations

STA800 Smart Pressure Transmitter	7

Performance Under Rated Conditions – All Models

	Parameter		Description
	Analog Output		Two-wire, 4 to 20 mA (HART & DE Transmitters only)
	Digital Communications:		Honeywell DE, HART 7 protocol or FOUNDATION Fieldbus ITK 6.0.1 compliant
			All transmitters, irrespective of protocol have polarity insensitive connection.
	HART & DE Output Failure			Honeywell Standard:	NAMUR NE 43
	Modes		Compliance:
	(NAMUR for DE Units requires		Normal Limits:	3.8 – 20.8 mA	3.8 – 20.5
	selecting display and		mA
	configuration buttons or factory		Failure Mode:	≤ 3.6 mA and ≥ 21.0 mA	≤ 3.6 mA and ≥
	configuration)		21.0 mA
	Supply Voltage Effect		0.005% of span per volt.
	Transmitter Turn on Time		HART or DE: 2.5 sec
	(includes power up & test
			Foundation Fieldbus: Host dependant
	algorithms)
	Response Time		DE/HART Protocol	FOUNDATION Fieldbus
	(delay + time constant)		80ms	150ms (Host Dependant)
	Damping Time Constant		HART: Adjustable from 0 to 32 seconds in 0.1 increments. Default Value: 0.5
			seconds
			DE: Discrete values 0, .16, .32, .48, 1, 2, 4, 8, 16, 32 seconds. Default Value: 0.48
			seconds
	Vibration Effect		Less than +/- 0.1% of URL w/o damping
			Per IEC60770-1 field or pipeline, high vibration level (10-2000Hz: 0.21
			displacement/3g max acceleration)
	Electromagnetic		Meets IEC61326
	Compatibility
	Lightning Protection Option		Leakage Current: 10uA max @ 42.4VDC 93C
			Impulse rating:
			8/20uS	5000A (>10 strikes)	10000A (1 strike min.)
			10/1000uS 200A (> 300 strikes)