Lawson Labs, Inc.

Specification Sheet

MODEL 17B DIFFERENTIAL MULTIPLEXER

Multiplexers & Multiplexed Amplifiers

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Manual
.rtf .pdf .zip

ANALOG INPUTS:: 16 fully differential inputs.
INPUT RANGE:: +/- 5.75 volts.
INPUT OVERVOLTAGE PROTECTION: 120 volts transient 65 volts continuous.
SETTLING TIME:: 1 millisecond.
ON RESISTANCE: 20K ohms typical.
OFF RESISTANCE: 100 megohms typical.
CONTROL INPUTS:: 4 total
6 volt logic, negative true. Compatible with all Lawson Labs A/D cards.
POWER REQUIREMENT: 105-135 VAC, 50-60HZ, 6 Watts.
SIZE: 6.25 x 3.75 x 2 inches.
PRICE: $165.00
OPTIONS: DC powered, panel mounting $20.00

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MODEL 20B THERMOCOUPLE AMPLIFIER

Multiplexers & Multiplexed Amplifiers

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Manual
.rtf .pdf .zip

THERMOCOUPLE INPUTS

6 fully differential channels.

INPUT OVERVOLTAGE PROTECTION

120 volts transient.

65 volts continuous.

INPUT IMPEDANCE

100,000 megohms typical.

LINEARITY

0.05% of full scale.

SETTLING TIME

400 microseconds.

OVERALL ACCURACY

System accuracy not including thermocouple conformity error is +/- 1 degree Centigrade with the Model 20B at room temperature. The standard linearization programs add 0.5 degrees C variation.

COLD JUNCTION COMPENSATION

Exposing the Model 20B to a step change of 20 degrees Centigrade will cause a temporary additional measuring error of less than 0.5 degrees Centigrade.

RANGE

The Model 20B accommodates the full range of all common thermocouple types. Platinum thermocouple users may want a custom gain setting for improved resolution.

CONTROL INPUTS

6 volt logic, negative true. Compatible with all Lawson Labs A/D cards.

POWER REQUIREMENT

105-135 VAC, 50-60HZ, 6 Watts.

SIZE

6.25 x 3.75 x 2 inches.

PRICE

Base unit	$195.00
OPTIONS
7-channel general purpose amplifier, gain=50	no charge
Premium low-noise amplifier	$25.00
Custom gain setting (x2 to x400)	$20.00
DC powered, panel mounting	$20.00

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MODEL 20BA THERMOCOUPLE AMPLIFIER

Multiplexers & Multiplexed Amplifiers

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Manual
.rtf .pdf .zip

The Model 20BA is the same as the Model 20B (listed above)
with the following differences.

The Model 20BA is a 8-Channel General Purpose Differential Amplifer version of the 20B.

The standard gain is x50. Options include custom gain (1 to 400) and a premium amplifer option.

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MODEL 35B THERMOCOUPLE AMPLIFIER

Multiplexers & Multiplexed Amplifiers

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Manual
.rtf .pdf .zip

VB302 sample app, application documentation

THERMOCOUPLE INPUTS

14 fully differential channels.

INPUT OVERVOLTAGE PROTECTION

120 volts transient
65 volts continuous.

INPUT IMPEDANCE

100,000 megohms typical.

LINEARITY

0.05% of full scale .

SETTLING TIME

500 microseconds.

OVERALL ACCURACY

+/- 1 degree Centigrade with the Model 35B at room temperature not including thermocouple conformity error. The standard linearization programs add 0.5 deg. C variation.

COLD JUNCTION COMPENSATION

Exposing the Model 35B to a step change of 20 degrees Centigrade will cause a transitory error of less than 0.5 deg. C.

TEMPERATURE RANGE

The Model 35B accommodates the full range of all common thermocouple types. Platinum TC users may want a custom gain setting for improved resolution.

CONTROL INPUTS

6 volt logic, negative true. Compatible with all Lawson Labs A/D cards.

POWER REQUIREMENT

105-135 VAC, 50-60HZ, 6 Watts.

SIZE

6.25 x 3.75 x 2 inches.

PRICE

Base unit	$350.00
OPTIONS
16-channel general purpose amplifier, gain=50	no charge
Premium low-noise amplifier	$25.00
Custom gain setting (x2 to x400)	$20.00
DC powered, panel mounting	$20.00

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MODEL 35BA GENERAL PURPOSE AMPLIFIER

Multiplexers & Multiplexed Amplifiers

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Manual
.rtf .pdf .zip

The Model 35BA is the same as the Model 35B (listed above)
with the following differences.

The Model 35BA is a 16-Channel General Purpose Differential Amplifer version of the 35B.

The standard gain is x50. Options include custom gain (1 to 400) and a premium amplifer option.

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