Fisher 846 Electro-Pneumatic Transducer by Transmitter Shop

Input Signal:-

Standard Performance:

4 to 20 mA DC, 4 to 12 mA DC, or 12 to 20 mA DC. Field adjustable split ranging.

Multirange Performance:

4 to 20 mA DC. Consult factory for split range input.

Output Signal⁽¹⁾:-

Standard Performance:

(Consult factory for split range output)

Direct Action (Minimum span of 6 psi)

Typical outputs: 0.2 to 1.0 bar (3 to 15 psi).

Rangeability between 0.1 and 1.2 bar (1 and 18 psi).

Reverse Action (Minimum span of 11 psi)

Typical outputs: 1.0 to 0.2 bar (15 to 3 psi)

Rangeability between 1.2 and 0.1 bar (18 and 1 psi)

Multirange Performance:

Direct Action (Minimum span of 6 psi)

Typical outputs: 0.2 to 1.9 bar (3 to 27 psi), 0.4 to2 bar (6 to 30 psi), and 0.3 to 1.7 bar (5 to 25 psi)
Rangeability between 0.03 and 2.3 bar (0.5 and 33 psi).

Reverse Action (Minimum span of 11 psi)

Typical outputs: 1.9 to 0.2 bar (27 to 3 psi), 2 to0.4 bar (30 to 6 psi), and 1.7 to 0.3 bar (25 to 5 psi)
Rangeability between 2.3 and 0.03 bar (33 and 0.5 psi)

Supply Pressure⁽²⁾:-

Standard Performance:

1.2 to 1.6 bar (18 to 24 psi)

Multirange Performance:

0.2 bar (3 psi)(3) greater than the maximumcalibrated output pressure

Maximum:

2.4 bar (35 psi)

Supply Pressure Medium:-

Clean, dry air

Per ISA Standard 7.0.01:

A maximum 40 micrometer particle size in the airsystem is acceptable. Further filtration down to 5micrometer particle size is recommended. Lubricant content is not to exceed 1 ppm weight (w/w) orvolume (v/v) basis. Condensation in the air supplyshould be minimized

Per ISO 8573-1:

Maximum particle density size: Class 7

Oil content: Class 3

Pressure Dew Point: Class 3 or at least 10°C less thanthe lowest ambient temperature expected

Supply Pressure Medium:-

Standard:

6.4 m3/hr (240 scfh) at 1.4 bar (20 psi) supply pressure

Multirange:

9.7 m3/hr (360 scfh) at 2.5 bar (35 psig) supply pressure

Maximum Steady-State Air Consumption⁽⁴⁾:-

0.3 m3/hr (12 scfh) at 1.4 bar (20 psi) supply pressure

Temperature Limits⁽²⁾:

Operating: -

-40 to 85 ? (-40 to 185 ?)

Storage: -

40 to 93 ? (-40 to 200 ?)

Humidity Limits:

0 to 100% condensing relative humidity

Performance⁽⁵⁾:

Note:

The performance of all 846 I/Ps is verified using computer automated manufacturing systemsto ensure that every unit shipped meets its performance specifications.

Linearity, Hysteresis, and Repeatability:

±0.3% of span.

Temperature Effect (total effect including zero and span):

±0.07%/ ? (0.045%/ ?) of span

Vibration Effect:

±0.3% of span per g during the following conditions:5 to 15 Hz at 4 mm constant displacement15 to 150 Hz at 2 g. 150 to 2000 Hz at 1 g.per SAMA Standard PMC 31.1, Sec. 5.3, Condition 3,Steady State.

Shock Effect:

±0.5% of span, when tested per SAMA Standard PMC 31.1, Sec. 5.4.

Supply Pressure Effect:

Negligible

Electromagnetic Interference (EMI):

Tested per IEC 61326-1 (Edition 1.1). Meets emission levels for Class A equipment (industrial locations) and Class B equipment (domestic locations). Meets immunity requirements for industrial locations

Leak Sensitivity⁽⁴⁾:

Less than 1.0% of span for up to4.8 m3/hr (180 scfh) downstream leakage

Overpressure Effect:

Less than 0.25% of span form is application of up to 7.0 bar (100 psi) supply pressure for less than 5 minutes to the input port.

Reverse Polarity Protection:

No damage occurs from reversal of normal supply current (4 to 20 mA) or from misapplication of up to100 mA.

Connections:

Supply Air, Output Signal, and Output Gauge:

1/4-18 NPT internal connection

Electrical:

1/2-14 NPT internal conduit connection

Adjustments:

Zero and Span:

screwdriver adjustments located in terminal compartment.

Remote Pressure Reading (RPR)

Jumper selectable, ON or OFF, if unit includes option

Frequency Range:

0 to 10,000 Hz

Amplitude:

: 0.4 to 1.0 Vp-p

Required Operating Voltage with Remote pressure Reading Off

Min. 6.0 V (at 4 mA)

Max. 7.2 V (at 20 mA)

Required Operating Voltage with Remote Pressure Reading On

Min 6.4 V (at 4 mA)

Max. 8.2 V (at 20 mA)

Electrical Classification

Hazardous area:

CSA C/US— Intrinsically Safe, Explosion-proof,Non-Incendive.

FM— Intrinsically Safe, Explosion-proof, Non-Incendive.

ATEX— Intrinsically Safe, Flameproof, Type n

IECEx— Intrinsically Safe, Flameproof

Refer to Hazardous Area Classifications and Special Instructions for “Safe Use” and Installation in Hazardous Locations in Section 2 for additional information

Electrical Housing: Tropicalization (Fungus test per MIL-STD-810)

CSA C/US— Type 4X

FM— Type 4X

ATEX— IP66⁽⁶⁾

IECEx— IP66⁽⁶⁾

Other Classifications/Certifications

INMETRO— National Institute of Metrology, Quality, and Technology (Brazil)

KGS— Korea Gas Safety Corporation (South Korea)

NEPSI— National Supervision and Inspection Centre for Explosion Protection and Safety of Instrumentation (China)

Construction Materials

Housing:

Low-copper aluminum with polyurethane paint, or 316 stainless steel.

O-Rings:

Nitrile, except silicone for sensor O-rings.

Options

Fisher 67CFR filter regulator, supply and output gauges or tire valve remote pressure reading, module cover with multiple stroke ports, stainless steel housing, or stainless steel mounting bracket.

Weight

Aluminum:

2.9 kg (6.5 lb) excluding options

Stainless Steel:

6.7 kg (14.8 lb) excluding options<