U.S. GAUGE PMT PRODUCTS PRESSURE TRANSDUCERS BULLETIN DB-851 PART #K796381 Model 851 Series Pressure Transmitter F E AT U R E S A miniature, low-priced fullfeatured transmitter--just 1 lb. (450 grams) All welded 316 stainless steel construction and wetted parts (no aluminum) Ranges from 0-3 (0.2 bar) to 0-5000 psig (350 bar) +0.25% accuracy Zero and span adjustability Full 5:1 range turndown FM & CSA Explosion-proof and intrinsically safe 4-20 mA output at 12-40 VDC Water tight cable or conduit connection optional 1/2" NPT Female process connection or flush mount version MODEL 851 SERIES PRESSURE TRANSMITTERS Straight in-line construction for a slim profile 24 inch (61 cm) cable standard PMT QUALITY COMMITMENT AMETEK's commitment to quality in pressure measurement technology is unequalled in the industry. Behind every Model 851 transmitter are 20 years of piezoresistive sensor chip and stainless steel diaphragm/oil isolation technology. Over these years AMETEK has developed and perfected test EFFECTIVE: 5/99 methods and quality checks to ensure that every transmitter will operate within specification in tough environments for years of service. The most advanced automated test systems in the industry are used to characterize and final test every transmitter. In addition, every transmitter goes through numerous quality checks which verify secure assembly methods all the way through the production process. Nothing less than a 100% quality level is accepted. With this PMT quality commitment and our zero-defect philosophy, the AMETEK warranty is backed with confidence. SUPERSEDES: 5/95 U.S. GAUGE * PMT PRODUCTS 820 Pennsylvania Blvd., Feasterville, PA 19053 U.S.A. * TEL: (215) 355-6900 * FAX: (215) 355-2937 * www.ametekusg.com Model 851 Series Pressure Transmitters DESCRIPTION The Model 851 is the most durable, accurate and cost-effective pressure transmitter presently available. It is designed for years of stable performance in even the toughest environmental and media conditions, such as refineries, petrochemical facilities, paper & pulp plants, and waste water treatment facilities. Approvals include FM and CSA for both intrinsic safety and explosionproof ratings. The Model 851 also meets NACE standards for offshore applications, and a one year warranty is standard with every unit. The small size and light weight of the Model 851 transmitter eliminate the need for complicated mounting hardware and mechanical supports, thereby reducing installation time substantially. The in-line connection permits simple field wiring without the need for additional hardware, adding to the speed and ease of installation. Its slim profile allows for mounting in places too tight for most other transmitters. A 4-20 mA output is standard with a 12-40 VDC power supply. The Model 851 is bench adjustable, allowing for calibration of zero and span. With the cover sealed double O-ring assembly, this transmitter is weather proof and capable of direct spray, clean-in-place applications. O P E R AT I O N The heart of the Model 851 pressure transmitter is a silicon piezoresistive sensing chip. This miniature microetched semiconductor gives a voltage output proportional to the applied pressure. This chip is isolated from the process media by a stainless steel diaphragm. A silicone oil or other specified fill fluid is used to transmit the process pressure to the sensor. A surface mount amplifier board, enclosed in a sealed chamber, is used to convert the millivolt signal from the sensor to a calibrated 4-20 mA transmitter output. Transmitter electronics are surge protected. Each transmitter is tested over both pressure and temperature ranges, and a thick film compensator circuit is used to bring the output of the sensor into specification. After compensation, every transmitter is tested a second time for pressure and temperature effects to ensure that it meets performance specifications. DIMENSIONS IN (MM) 2 CONDUCTOR CABLE (PLUS GROUND) 24" STANDARD 2 CONDUCTOR CABLE (PLUS GROUND) 24" STANDARD 2 CONDUCTOR CABLE (PLUS GROUND) 24" STANDARD 1/2" - 14 NPT CONDUIT CONNECTION (OPTIONAL) 1/2" - 14 NPT CONDUIT CONNECTION (OPTIONAL) 1.25 (31.8) DIA. 1.25 DIA. (31.8) 1.25 DIA. (31.8) 6.45 (163.8) 7.36 (186.9) 1/2" - 14 NPT MODEL 851 TRANSMITTER 6.29 (159.8) 1/2" - 14 NPT MODEL 851 TRANSMITTER MODEL 851 FLUSH MOUNT TRANSMITTER S P E C I F I C AT I O N S FUNCTIONAL SPECIFICATIONS SERVICE: Liquid, gas or vapor. RANGE LIMITS: 0/3 to 0/6 psi (0/.2 to 0/.4 bar) 0/6 to 0/15 psi (0/.4 to 0/1 bar) 0/3 to 0/15 psi (0/.2 to 0/1 bar) 0/6 to 0/30 psi (0/.4 to 0/2.1 bar) 0/20 to 0/100 psi (0/1.4 to 0/6.9 bar) 0/60 to 0/300 psi (0/4 to 0/20.7 bar) 0/200 to 0/1000 psi (0/14 to 0/69.0 bar) 0/600 to 0/3000 psi (0/40 to 0/206.9 bar) 0/1000 to 0/5000 psi (0/70 to 0/344.8 bar) OUTPUT: 4-20 mADC, limited to 30 mADC. POWER SUPPLY: 12 to 40 VDC with reverse polarity protection. LOOP RESISTANCE: 1400 ohms max at 40 volts. VIBRATION EFFECT: +0.1% of upper range limit for 3 g to 200 Hz. POSITION EFFECT: Zero shifts up to 0.01 psi. OVERRANGE EFFECTS: +0.15% Full Scale per 200% of maximum range. PHYSICAL SPECIFICATIONS MATERIALS OF CONSTRUCTION: Process Wetted Parts: 316 Stainless Steel Diaphragm (Models 851F): Hastelloy "C" Non Wetted Parts: 316 Stainless Steel; VITON "O" Ring Fill Fluid: DC 200 Silicone (Standard) Process Connection: Reference Model Code Electrical Connection: Reference Model Code Weight: 1 lb. (450 grams) Cable Length: 24 inches (61 cm), 22 AWG CLASSIFICATIONS FACTORY MUTUAL: Intrinsically safe for Class I, II, III Division I, Groups A, B, C, D, E, F, G for hazardous locations per AMETEK Dwg. BK750407. Entity Requirement: Imax = 225mA, Vmax = 36V, Ci = 0.126 f., Li = 0 mH Explosion Proof for Class I, II, III Division 1, Groups C, D,E, G, for hazardous locations. NEMA 4 Enclosure. Conduit seal must be within 18" of transmitter. CANADIAN STANDARDS ASSOCIATION: Exia-Intrinsically safe for Class I, Division 1 & 2, Groups A, B, C, D; Class II, Groups E, F, G when connected per AMETEK Dwg. BK750483. Explosion Proof for Class I, Division 1, Groups B, C, D; Class II, Groups E, F, G; Class III for Hazardous locations. Enclosure 4, Temperature Code T3C (160o C) C A L I B R AT I O N MODCAL II CALIBRATION SYSTEM* TURNDOWN: 5:1. ZERO ADJUST: +10%. SPAN ADJUST: +10%. TEMPERATURE LIMITS: Electronics (Ambient): -40o F to 140o F (-40o C to 60o C) Process Interface: -40o F to 212o F (-40o C to 100o C) Storage: -40o F to 212o F (-40o C to 100o C) OVERRANGE: 300% upper range limit. HUMIDITY LIMITS: 0-100% RH. PERFORMANCE SPECIFICATIONS ACCURACY: +0.25% of calibrated span including linearity, hysteresis and repeatability. (BFSL) RESPONSE TIME: Time constant of 20 milliseconds. STABILITY: +0.5% of upper range limit for six months. TEMPERATURE EFFECT: (includes zero and span) Compensated: -20o F to 180o F (-29o C to 82o C) GROUND POSITIVE NEGATIVE TURNDOWN (COURSE) ADJUSTMENT SPAN ADJUSTMENT Between 30o F and 130o F (-1o C and 54o C): +1% of URL per 50o F (28o C) Between -20o F and 180o F (-29o C and 82o C): +1.6% of URL per 50o F (28o C) POWER SUPPLY EFFECT: +0.005% Full Scale per volt. SURGE PROTECTION: Standard. *Contact factory for information on calibration system. ZERO (FINE) ADJUSTMENT Model 851 Series Pressure Transmitters O R D E R I N G I N F O R M AT I O N MODEL NUMBER 851-T-G-0015-C-L-S-A-S-(0-15 PSI) MODEL 851 ELECTRONIC PRESSURE TRANSMITTER PROCESS CONNECTION T = 1/2" NPT F = FLUSH1 PRESSURE TYPE G = GAUGE PRESSURE RANGE 3015 = 3-15 PSI (.2 to 1 bar) 0006 = 0/3 To 0/6 PSI (0/0.2 to 0/0.4 bar) 0015 = 0/6 To 0/15 PSI (0/0.4 to 0/1 bar) 0030 = 0/6 To 0/30 PSI (0/0.4 to 0/2.1 bar) 0100 = 0/20 To 0/100 PSI (0/1.4 to 0/6.9 bar) 0300 = 0/60 To 0/300 PSI (0/4 to 0/20.7 bar) 1000 = 0/200 To 0/1000 PSI (0/14 to 069.0 bar) 3000 = 0/600 To 0/3000 PSI (0/40 to 206.9 bar) 5000 = 0/1000 To 0/5000 PSI (0/70 to 0/344.8 bar) ELECTRICAL CONNECTION N = STANDARD NUT/CABLE3* C = 1/2" NPT FEMALE CONDUIT CONNECTION/CABLE* DIAPHRAGM L = 316L STAINLESS STEEL H = HASTELLOY TYPICAL WIRING DIAGRAM RECEIVER/CONTROLLER (BLACK) FILL S = SILICONE AGENCY APPROVAL A = FACTORY MUTUAL (FM) AND CANADIAN STANDARD ASSOC. (CSA) IS & EXP. PROOF2 C = FACTORY MUTUAL (FM) AND CANADIAN STANDARD ASSOC. (CSA) IS1 POWER SUPPLY COUPLING (FLUSH ONLY) S = 316 SS COUPLING; TEFLON GASKET P = 316 SS PLUG, COUPLING; TEFLON GASKET N = NO COUPLING; TEFLON GASKET (RED) (GREEN) SHIELD/DRAIN CALIBRATED RANGE 1/2" NPT CONDUIT 1. Flush Connection only available up to 300 PSI (20 bar). 2. Explosion Proof Approval requires "C" electrical connection option. 3. Not available with agency approval "A", FM/CSA explosion-proof. *Cable length is 24" (22 AWG) standard. GROUND NEGATIVE TURNDOWN (COURSE) ADJUSTMENT Example: 851-T-G-0015-C-L-S-A-S (0-15 PSI) POSITIVE ZERO (FINE) ADJUSTMENT 1/2" NPT Connection, Pressure Type Gauge, 0/6 To 0/15 PSI (0/0.4 to 0/1 bar), Female Conduit Connection/Cable, 316L Stainless Steel, Silicone Fill, Factory Mutual (FM) and Canadian Standard Assoc. (CSA) IS & Exp. Proof, 316 Stainless Steel Coupling and Teflon Gasket, 0-15 PSI Calibrated Range SPAN ADJUSTMENT SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE U.S. GAUGE * PMT PRODUCTS 820 PENNSYLVANIA BLVD., FEASTERVILLE, PENNSYLVANIA 19053 U.S.A. TEL: (215) 355-6900 * FAX: (215) 355-2937 * www.ametekusg.com (c) 1999, by AMETEK, Inc. All rights reserved. 2.5M699 (110048)