Laurel Electronics Laureate RTD Temperature Panel Meter-Controller User Manual

LAUREL

ELECTRONICS, INC.

Features

•

Factory calibrated for 100Ω platinum, 10Ω copper & 120Ω nickel RTDs

•

2, 3 or 4-wire connection with lead resistance compensation

•

Highly accurate and repeatable

•

Selectable 1° or 0.°1, degrees Celsius, Fahrenheit, Kelvin or Rankin

•

Up to 60 conversions per second

•

Peak or valley display

•

Universal AC power, 85-264 Vac

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1/8 DIN case sealed to NEMA-4X from front panel

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Optional serial I/O: Ethernet, USB, RS232, RS485, Ethernet-to-RS485 converter

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Optional relay output: dual or quad relays, contact or solid state

•

Optional isolated analog output: 4-20 mA, 0-20 mA, 0-10V, -10 to +10V

•

Optional low voltage power: 10-48 Vdc or 12-32 Vac

Description

The Laureate™ RTD meter is factory calibrated for four Re-

sistance Temperature Detector (RTD) types: 100-ohm platinum
(Pt100) with DIN alpha of 0.00385, 100-ohm platinum (Pt100)
with ANSI alpha of 0.003902, 10-ohm copper with alpha of

0.00427, and 120-ohm nickel with alpha of 0.00672. The entire
span of each RTD type is presented in a single range. The RTD
type, unit of measure (°C or °F) and resolution (1°, 0.1° or 0.01°)
are selectable from the front panel or via the meter's serial
interface. Display in Kelvin or Rankin is selected by offsetting the
Celsius or Fahrenheit ranges.

RTD connections can be via 2, 3 or 4 wires. With 3 or 4-wire
connections, the meter automatically compensates for lead
resistance to the sensor. With 2-wire connection, the meter can
measure and then subtract the lead wire resistance.

All ranges for all RTD types are digitally calibrated at the
factory, with calibration factors stored in an EEPROM on the
signal conditioner board. This allows temperatures sensors and
signal conditioner boards to be changed in the field without
recalibrating the meter.

Specifications

Laureate™ RTD Temperature

Panel Meter / Controller

Digital filtering is selectable for electrically noisy environments

or resolution to 0.01°, including a batch averaging filter and an
adaptive moving average filter which provides a choice of 8 time
constants from 80 ms to 9.6 s. When a significant change in
signal level occurs, that filter adapts by briefly switching to the
shortest time to follow the change, then reverts back to the
selected time constant. In a selectable Auto filter mode, the filter
time constant is automatically selected based on detected signal
noise.

Designed for system use. Optional plug-in boards include
Ethernet and other serial communication boards, dual or quad
relay boards, and an isolated analog output board. Laureates
may be powered from 85-264 Vac or optionally from 12-32 Vac
or 10-48 Vdc. The display is available with red or green LEDs.
The 1/8 DIN case meets NEMA 4X (IP65) specifications from the
front when panel mounted. Any setup functions and front panel
keys can be locked out for simplified usage and security. All
power and signal connections are via UL / VDE / CSA rated
screw clamp plugs.

RTD

Metal

Platinum

Platinum

Nickel 0.00672 120Ω

Copper 0.00427 9.035Ω

Alpha

0.003850
(DIN)

0.003902

(ANSI)

R at

0°C

100Ω

100Ω

R at top

of range

390.48Ω
at 850°C

394.36Ω
at 850°C

380.31Ω
at 260°C

19.116Ω
at 260°C

Excitation

Current

196 µA

196 µA

196 µA

5.0 mA

Range

-200°C to +850°C

-328°F to +1562°F

-200°C to +850°C

-328°F to +1562°F

-80°C to +260°C

-112°F to +500°F

-97°C to +260°C

-143°F to +500°F

Conformity

Error

±0.03°C
±0.05°F

±0.04°C
±0.07°F

±0.05°C
±0.09°F

±0.05°C
±0.09°F

LAUREL

ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel [phone] • www.laurels.com 1

Display

Readout
Color
Indicators

Accuracy

Calibration, Pt 100 DIN
Calibration, Pt 100 ANSI
Calibration, Ni 120
Overall accuracy at 25ֲ°C
Span tempco

Electrical

Connection
Overvoltage protection
Open sensor indication
Sensor lead resistance
Tempco per conductor

A-to-D Conversion

Technique
A-to-D Rate
Output Update
Display Update

Power

Voltage, standard
Voltage, optional
Frequency
Power Isolation

5 digits, 7-segment, 14.2 mm (.56")
Red or green LED
Minus sign, 2 red LED lamps

Per IEC 751 (ITS-90)
NIST Monograph 126
DIN 43760
±0.01% of full span + conformity error
±0.003% of reading/°C

2, 3 or 4-wire
125 Vac
Flashes full-scale
2-wire, 10 mdeg/Ω/deg up to 10Ω
3 & 4-wire, 10 mdeg/Ω/deg up to 100Ω

Concurrent Slope™ (Pat 5,262,780)
60/s at 60 Hz, 50/s at 50 Hz
56/s at 60 Hz, 47/s at 50 Hz

3.5/s at 60 Hz, 3/s at 50 Hz

85-264 Vac or 90-300 Vdc (DC operation not UL approved)
12-32 Vac or 10-48 Vdc
DC or 47-63 Hz
250V rms working, 2.3 kV rms per 1 min test

Analog Output (optional)

Output Levels
Current compliance
Voltage compliance
Scaling
Resolution
Isolation

Relay Outputs (optional)

Relay Types

Current Ratings

Output common
Isolation

Serial Data I/O (optional)

Board Selections

Protocols
Data Rates
Digital Addresses
Isolation

Environmental

Operating Temp.
Storage Temp.
Relative Humidity
Protection

4-20 mA, 0-20 mA, 0-10V, -10 to +10V (jumper selectable)
2 mA at 10V ( > 5 kΩ load)
12V at 20 mA ( < 600Ω load)
Zero and full scale adjustable from -99999 to +99999
16 bits (0.0015% of full scale)
250V rms working, 2.3 kV rms per 1 min test

2 Form C contact relays or 4 Form A contact relays (NO)
2 or 4 Form A, AC/DC solid state relays (NO)
8A at 250 Vac or 24 Vdc for contact relays
120 mA at 140 Vac or 180 Vdc for solid state relays
Isolated commons for dual relays or each pair of quad relays
250V rms working, 2.3 kV rms per 1 min test

Ethernet, Ethernet-to-RS485 server, USB, USB-to-RS485 server, RS485
(dual RJ11), RS485 Modbus (dual RJ45), RS232.
Modbus RTU, Modbus ASCII, Laurel ASCII protocol
300 to 19200 baud
247 (Modbus), 31 (Laurel ASCII),
250V rms working, 2.3 kV rms per 1 min test

0°C to 60°C

-40°C to 85°C
95% at 40°C, non-condensing
NEMA-4X (IP-65) when panel mounted

LAUREL

ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel [phone] • www.laurels.com 2