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P499 Series Electronic Pressure Transducers Product/Technical Bulletin 1

The P499 Series Electronic Pressure Transducers are

compact, economical, rugged, direct-mount pressure

transducers designed for use in commercial

refrigeration and air conditioning applications. These

transducers produce an analog signal based on the

sensed pressure.

The P499 Series transducers feature environmentally-

protected electronics with stainless steel construction.

The digitally-compensated P499 transducers are highly

accurate over a broad temperature range, resisting the

effects of wide ambient temperature swings, high

humidity, condensation, and icing. The pressure port is

machined from a solid piece of 17-4PH stainless steel.

No O-rings, organic materials, or welds are exposed to

the pressure media, allowing for a leak-proof, all-metal,

sealed pressure system.

The P499 transducers operate with all pressure media

compatible with 17-4PH stainless steel, including most

non-corrosive refrigerants. They are also suitable for

use with ammonia.

The P499 Series provides transducers in numerous

pressure ranges, covering most common refrigeration

and air conditioning applications. These transducers

may also be used in other non-corrosive fluid

applications.

Figure 1: P499 Electronic Pressure Transducers,

Style 47 Fitting (Left) and

Style 49 Fitting (Right)

Table 1: Features and Benefits

Features Benefits

Single-Piece Machined Stainless Steel Pressure

Port

Provides a durable assembly, eliminates potential of refrigerant loss

due to O-ring or weld failures; resists damage due to physical shock,

vibration, and pressure pulsations.

Environmentally-Protected (IP67) Electronics Withstand the effects of adverse conditions associated with typical

Heating, Ventilating, and Air Conditioning (HVAC) and Refrigeration

applications, including freeze/thaw applications on suction lines.

Reliable, Repeatable Performance and Long

Operating Life

Minimizes service and replacement costs.

Available in Numerous Pressure Ranges Providing a single line of transducers for all refrigeration and

air conditioning application needs.

Slender Body Design Facilitates use of deep-socket wrenches for ease of installation;

requires zero turning radius.

1% Total Error Band Provides high-accuracy performance.

CE and UL Agency Listings Allow for global applications.

P499 Series Electronic Pressure Transducers

Product/Technical Bulletin

P499xxx-x

Code No. LIT-12011190

Part No. 24-7664-2659, Rev. B

Issued June 26, 2008

Supersedes June 13, 2007

Summary of content (8 pages)

PAGE 1
P499 Series Electronic Pressure Transducers Product/Technical Bulletin P499xxx-x Code No. LIT-12011190 Part No. 24-7664-2659, Rev. B Issued June 26, 2008 Supersedes June 13, 2007 The P499 Series Electronic Pressure Transducers are compact, economical, rugged, direct-mount pressure transducers designed for use in commercial refrigeration and air conditioning applications. These transducers produce an analog signal based on the sensed pressure.
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IMPORTANT: P499 Series Electronic Pressure Transducers are intended to provide a signal to operating controls under normal operating conditions.
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Installation To mount the P499 transducer: See Mounting and Wiring for information on installing the P499 Series Electronic Pressure Transducers. 1. Hand thread the P499 transducer to the pressure tap point. Parts Required 2. Tighten the connection using the wrench flats provided to avoid damaging the transducer. P499 transducers require wire harnesses for all models that do not have an integral cable. Use Table 2 to select a wire harness.
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Checkout 0 to 10 VDC Versions Before applying power, check all wiring connections. After applying power, operate controlled equipment under normal conditions and use a reliable set of pressure gauges to verify that the transducer and the associated control are operating properly. 0.5 to 4.5 VDC Ratiometric Versions To verify that the transducer is working properly: 1.
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3. Measure the current between the transducer SUPPLY (red wire) and COMMON (black wire) with a multimeter set to measure milliamperes (mA). This is the measured output current. Ordering 4. Compare the ideal output current (Step 2) to the measured output current (Step 3). If the current from measured output current differs greatly from the ideal output current, replace the transducer.
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Table 3: Standard 0.5 to 4.5 VDC Ratiometric P499 Transducer Models with Packard Electrical Connections Product Code Number Pressure Fitting Pressure Range1 Individual or Kit2 P499RAP-101C 1/8”-27 NPT External Thread (Style 49) 0 to 100 psi (0 to 6.9 bar) Individual P499RAP-102C 0 to 200 psi (0 to 13.8 bar) Individual P499RAP-105C 0 to 500 psi (0 to 34.5 bar) Individual 0 to 750 psi (0 to 51.7 bar) Individual 0 to 100 psi (0 to 6.9 bar) Individual 0 to 500 psi (0 to 34.
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Table 5: Standard 4 to 20 mA P499 Transducer Modelswith Packard Electrical Connections Product Code Number Pressure Fitting Pressure Range1 Individual or Kit2 P499AAP-101C 1/8”-27 NPT External Thread (Style 49) 0 to 100 psi (0 to 6.9 bar) Individual 0 to 500 psi (0 to 34.5 bar) Individual 0 to 750 psi (0 to 51.7 bar) Individual 0 to 100 psi (0 to 6.9 bar) Individual 0 to 500 psi (0 to 34.5 bar) Individual 0 to 750 psi (0 to 51.
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Technical Specifications P499 Series Electronic Pressure Transducers Pressure Ranges 0 to 100 psi, 0 to 200 psi, 0 to 500 psi, 0 to 750 psi Maximum Working Pressure 2x Pressure Range; short duration; infrequent, abnormal condition Burst Pressure 5x Pressure Range Vacuum 30 microns (0.03 mm Hg); short term Media Compatibility All media compatible with 17-4PH stainless steel, including ammonia Output Signal 0.5 to 4.5 VDC, 0 to 10 VDC, or 4 to 20 mA Supply Voltage 0.5 to 4.