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Thermocouple & RTD Temperature
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Exceptional linearity & accuracy at high update rates.
DIN Rail mounted, digitally
programmable.
Features
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Description Laureate™ 4-20 mA transmitters with the temperature signal conditioner board provide a linearized, highly accurate, stable and repeatable transmitter output for multiple thermocouple types and 100 Ohm platinum RTDs. The meter accepts the outputs of types J, K, T, E, N, R and S thermocouples, plus 100 ohm platinum RTD’s with DIN alpha of 0.00385 and ANSI alpha of 0.003925. The thermocouple or RTD and temperature range, specified in °C or °F, are user-selectable. The temperature range can be as wide as the entire span of the thermocouple or RTD type, or as narrow as 150 counts (such as 15.0°), limited only by considerations of electrical noise and digital filtering time constants. Cold junction compensation automatically corrects for temperature variations at the thermocouple reference junction at the transmitters. Open sensor indication is standard and may be set up to indicate either upscale or downscale. RTD excitation is provided by the transmitter. RTD connections can be of the 2-, 3- or 4-wire type. For 3- and 4-wire connections, the transmitter automatically compensates for lead resistance of the sensor.
All Laureate analog input meters and transmitters allow exceptionally fast read rates. Concurrent Slope (Pat 5,262,780) is a method of analog-to-digital conversion that allows up to 60 conversions per second while integrating the input over a full power cycle. Fast read rates provide true readings and fast response for PID control applications and for peak capture. The transmitters are housed in a DIN rail case that is only 22.5 mm (0.89") thick. Signal connections are via detachable screw-clamp plugs. In addition to the 4-20 mA output that would typically be used for signal transmission in an industrial environment, a 0-10V analog output is selectable. Either selection provides 12-bit (0.025%) resolution of output span and is ultra-linear, with the analog output tracking the reading that would be transmitted digitally. Output isolation from signal and power grounds is provided by a separate on-board transmitter power supply, thereby eliminating potential problems caused by ground loops. The supply can an drive 20 mA into a 500 ohm (or lower) load for 10V compliance, or 10V into 5K ohm (or higher) load for 2 mA compliance.Transmitter programming is via a three-terminal RS-232 port using Laurel's PC-based Instrument Setup Software. This software can be downloaded from this website at no charge. The required transmitter-to-PC interface cable is available from Laurel (P/N CBL03). |
All ranges for all temperature sensor types
are digitally calibrated at the factory. This eliminates the need for field calibration or
drift caused by potentiometers found in non-microcomputer based devices.
Specifications
Laureate 4-20 mA Transmitters,
Thermocouple or RTD Input
Thermocouple Input
Pt 100 RTD Input
Thermocouple & RTD
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Pinouts
Laureate 4-20 mA Thermocouple Transmitter
(shown with optional dual relay
output)
Thermocouple Transmitter Connection
RTD Connections with Excitation & Lead Compensation
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The Laureate temperature transmitter allows 2-, 3- and 4-wire RTD hookup to the J5 connector. The transmitter applies an excitation current of 0.2 mA, which it monitors to make ratiometric corrections for excitation supply variations. In 2-wire hookup, the transmitter senses the voltage drop across the 100 ohm RTD and both lead wires. The effect of the lead wires can be measured and subtracted by shorting out the RTD during transmitter setup. In 3- and 4-wire hookup, the transmitter senses the voltage drop across the 100 ohm RTD and both lead wires as well as the voltage drop across the RTD and one lead wire. This allows the transmitter to determine the effect of one lead wire and mathematically subtract the effect of both lead wires. |
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| Operation as a
Fast ON/OFF Controller or Supervisory Monitor
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With the optional dual solid state relay output
option, which has a typical response
time of only 17 ms, Laureate temperature meters
and transmitters can
serve as extremely fast and accurate ON/OFF controllers
for closed-loop temperature control.
They can also serve as
supervisory process monitors and provide alarms or shutoffs when processes exceed normal
limits.
Ordering
Guide
Laureate 4-20 mA Transmitters,
Thermocouple or RTD Input
| Create a model
number in this format: TA202JF. This example calls out a
4-20 mA output transmitter, standard main board, 95-240
Vac power, isolated dual solid state relays, and a
temperature signal conditioner set for thermocouple Type
J, -347°F to 1400°F in = 4-20 mA out. Includes plug-in screw terminal
connectors. |
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Transmitter Type |
TA Laureate 4-20 mA Transmitter. | $235 |
| Main Board | 2 Standard Main Board. | NC |
| Power |
0 Isolated 95-240 Vac & 90-300 Vdc 1 Isolated 12-30 Vac & 10-48 Vdc. |
NC $30 |
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Setpoint Output |
0 None. 2 Isolated Dual Solid State Relays. |
NC $30 |
| Signal Input |
Thermocouples JC Thermocouple Type J, -210°C to 760°C. JF Thermocouple Type J, -347°F to 1400°F. KC Thermocouple Type K, -347°C to 1372°C. KF Thermocouple Type K, -408°F to 2501°F. TC Thermocouple Type T, -257°C to 400°C. TF Thermocouple Type T, -430°F to 752°F. EC Thermocouple Type E, -240°C to 1000°C. EF Thermocouple Type E, -400°F to 1830°F. NC Thermocouple Type N, -240°C to 1000°C. NF Thermocouple Type N, -410°F to 2370°F. SC Thermocouple Type S, -46°C to 1768°C. SF Thermocouple Type S, -51°F to 3214°F. RC Thermocouple Type R, -45°C to 1768°C. RF Thermocouple Type R, -49°F to 3213°F. |
NC |
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RTDs (100
Ohm Platinum) P385C RTD Alpha .00385, -202°C to 850°C. P385F RTD Alpha .00385, -331°F to 1562°F. P392C RTD Alpha .003925, -202°C to 631°C. P392F RTD Alpha .003925, -331°F to 1168°F. |
NC | |
| Note: The same temperature signal conditioner board can be user configured for all thermocouple and RTD types listed. Temperatures for each type are spanned by a single range. | ||
| Accessories |
CBL03 RS-232 cable, TA to RS-232 computer
port. CBL02 Adapter, RS-232 cable to USB computer port. |
$19 $39 |
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Order from distributors for shipment to USA or Canada. |
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Order online for international shipment. |
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Resource Pages |
