Omega 657 User guide

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SERIES 657

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RELATIVE HUMIDITY/TEMPERATURE TRANSMITTERS

Dual Channel Design for Simultaneous 4-20 mA Output Signals

CALIBRATION SERVICES AVAILABLE

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SPECIFICATIONS
Service: Drycleanair.

Range: Relativehumidity:0to100%;Temperature:32to212°F(0to100°C).
Accuracy: Relativehumidity:±2%(10to90%RH),±3%(0to10%and90to100%

RH);Temperature±1°F(0.5°C).

Temperature Limits: 32to140°F(0to60°C).
Pressure Limits: 1psi(.07bar).
Compensated Temperature Range: 32to140°F(0to60°C).
Power Requirements:10-35VDC.
Output Signal:2channelseach4-20mA.LooppoweredontheRHchannel.
Electrical Connections: 4 screw type terminals.
Mounting Orientation: Mount in any position.
Probe: 657-1:SS5/16˝x10˝(0.8x25.4cm);657C-1:5/16˝x9-1/10˝(0.8x23.1

cm).

Weight: 657-1:5.5oz(156g);657C-1:10oz(284g).

ACCESSORIES
Model Description
A-158

Splitange

A-159

Mounting gland

657 657C

The Series 657 Relative Humidity/Temperature Transmitters provide two
4-20 mA channels to produce separate output signals for both relative humidity
and temperature. These devices deliver ±2% accuracy for humidity and ±1°F for
temperature measurements. Stainless steel probe can be easily mounted to most
ductwork using either of the two optional kits below.

BENEFITS/FEATURES

• PolymerlmhumidityandthinlmRTDtemperaturesensorsofferhighlyreliableand

stable measurements.

• Remotemounthousingoffersinstallationexibility(657-1)

• Ruggeddie-castaluminumhousingisgreatforindustrialapplications(657C-1)

APPLICATIONS

• Cleanroommonitoring

•HVAC/buildingcontrolmonitoring

MODEL CHART
Model Description
657-1

RH/temperaturetransmitter

657C-1

RH/temperaturetransmitter-conduithousing

OPTIONS
To order add sufx: Description

-NIST NISTtraceablehumiditycalibrationcerticate

Example: 657C-1-NIST

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A-158 A-159

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1/2 NPT

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Humidity/Temperature

Transmitters

225