Model 88 Pressure Transmitter
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Catalog excerpts

Model 88 Pressure Transmitter - 1

Tel: 215-355-6900 www.ametekpmt.com Model 88 Features A miniature, low-• priced, full-featured transmitter— just 1.67 lb. • All welded 316 stainless steel construction and wetted parts (no aluminum) • Ranges from 0 to 3 to 0 to 5000 psig (0 to 0.2 to 0 to 350 bar) • ±0.25% accuracy • Zero and span adjustability • Full 5:1 range turndown • Integral junction box • FM and CSA explosion-proof and intrinsically safe • 4 to 20 mA output at 12 to 40 VDC • 5-year warranty • CENELEC-approved version available Operation The heart of the Model 88 pressure transmitter is a silicon piezoresistive sensing chip. This miniature microetched semiconductor gives a voltage output proportional to the applied pressure. The chip is isolated from the process media by a stainless steel diaphragm. A silicone oil or other specifi ed fi ll fl uid is used to transmit the process pressure to the sensor. An amplifi er PCB enclosed in a sealed chamber is used to convert the millivolt signal from the sensor to a calibrated 4 to 20 mA transmitter output. Feedthroughs for EMI and RF protection are used between the amplifi er board and the terminal housing. Each transmitter is tested over both pressure and temperature ranges. A compensator circuit is used to bring the output of the sensor into specifi cation. After compensation, every transmitter is tested a second time for pressure and temperature effects to ensure that it meets performance and specifi cations. Description The Model 88 is the most durable, accurate and costeffective pressure transmitter presently available. A fullfeatured, all stainless steel transmitter, it is designed for years of stable performance in even the toughest environmental and media conditions. Approvals include FM and CSA for both intrinsic safety and explosion-proof ratings. CENELEC approval for intrinsic safety available. The Model 88 also meets NACE standards for offshore applications. A fi ve year warranty is standard for the 88C. The small size and light weight of the Model 88 transmitter eliminates the need for complicated mounting hardware and mechanical supports, thereby reducing installation time substantially. The integral junction box permits simple field wiring without the need for additional hardware, adding to the speed and ease of installation. A 4 to 20 mA output is standard with a 12 to 40 VDC power supply. With all 316 stainless steel welded construction, the Model 88 is compatible with corrosive media and hazardous environments. With the cover retained by a stainless steel chain and no internal jumpers for span turndown, losses due to misplaced or dropped parts are eliminated. Pressure Transmitter

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Model 88 Pressure Transmitter - 2

Tel: 215-355-6900 www.ametekpmt.com PMT Quality Commitment AMETEK’s commitment to quality in Pressure Measurement Technology is unequalled in the industry. Behind every Model 88 transmitter is more than 20 years of piezoresistive sensor chip and stainless steel isolation technology. Over these years AMETEK has developed and perfected test methods and quality checks to ensure that every transmitter will operate within specifi cation in tough environments for years of service. The most advanced automated test systems in the industry are used to characterize and fi nal test every transmitter....

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Model 88 Pressure Transmitter - 3

Tel: 215-355-6900 www.ametekpmt.com • Temperature Limits: Electronics (Ambient): -40° to 140° F (-40° to 60° C) Process Interface: -40° to 212° F (-40° to 100° C) Storage: -40° to 212° F (-40° to 100° C) • Overrange: 300% upper range limit • Humidity Limits: 0 to 100% RH Performance Specifi cations • Accuracy: ±0.25% of calibrated span including linearity, hysteresis and repeatability • 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 to 180º F (-29° and 82° C) Between 30°...

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Model 88 Pressure Transmitter - 4

820 Pennsylvania Boulevard • Feasterville, PA 19053 • U.S.A. Tel: 215-355-6900 • Fax: 215-354-1802 • www.ametekpmt.com Model Numbering: 88 pressure transmitter 88 Pressure transmitter Approval C FM and CSA certifi ed D CENELEC certifi ed Pressure ranges 001 3 to 15 psi (21 to 104 kPa) 002 0/6 to 0/15 psi (0/0.4 to 0/1 bar) 003 0/15 to 0/30 psi (0/1 to 0/2 bar) 004 0/20 to 0/100 psi (0/1.4 to 0/7 bar) 005 0/60 to 0/300 psi (0/4 to 0/20 bar) 006 0/200 to 0/1000 psi (0/14 to 0/70 bar) 007 0/600 to 0/3000 psi (0/40 to 0/200 bar) 008 0/1000 to 0/5000 psi (0/70 to 0/350 bar) NON-STD 0/3 to 0/6...

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