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
•
1/8 DIN case sealed to NEMA-4X from front panel
•
Optional serial I/O: Ethernet, USB, RS232, RS485, Ethernet-to-RS485 converter
•
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 714-434-6131 • 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 714-434-6131 • www.laurels.com 2
RTD Connections with Excitation & Lead Compensation
In 4-wire hookup, different pairs of leads are used to apply the
excitation current and sense the voltage drop across the RTD,
so that the IR drop across the excitation leads is not a factor.
In 3-wire hookup, the meter senses the combined voltage drop
across the RTD plus two excitation leads. It also senses the
voltage drop across one excitation lead, and then subtracts twice
this voltage from the combined total. This technique effectively
subtracts all lead resistance and compensates for ambient
temperature changes if the two excitation leads are identical.
In 2-wire hookup, the meter senses the combined voltage drop
across the RTD and both lead wires. The voltage drop across the
lead wires can be measured by shorting out the RTD during meter
setup, and this voltage is then automatically subtracted from the
combined total. However, changing resistance of the lead wires
due to ambient temperature changes will not be compensated.
RTD hookup can be via 2, 3 or 4 wires to the J5 connector. The meter applies an
excitation current of 256 µA (Pt100 and Ni120) or 5 mA (Cu10).
Application Examples
Operation as a 4-20 mA Transmitter
With the optional analog output board, Laureate temperature meters can serve as superb, isolated 4-20 mA
transmitters. The analog output is scaled to the display,
which is linearized to °C or °F and is exceptionally
accurate. The analog output further tracks the high read
rate of the meter, at up to 60 readings per second at 60 Hz
power. Fast update rates are beneficial in many closedloop and PID control applications.
Operation as a Fast Controller
With the dual contact relay or dual solid state relay output
board options, Laureate temperature meters can serve as
extremely fast and accurate ON/OFF controllers for
closed-loop temperature control. Multiple setpoint
operating modes are individually selectable for each relay,
as explained in the dual-setpoint controller section. Relay
duty cycles and chatter can be minimized with
programmable hysteresis and time delays. High duty
cycles and extremely fast response times are possible with
the solid state relay, which has a typical response time of
only 17 ms.
Operation as a Supervisory Monitor
By using the optional dual contact relay or dual solid state
relay output options, Laureate temperature meters can
monitor processes and provide alarms or shutoffs when
these processes exceed normal limits. A band deviation
operating mode can be selected for each relay, where an
alarm is generated whenever the reading is a selected
number of counts above or below the setpoint. Relay
operation can be selected as latching or non-latching.
When an alarm or shutdown condition is reached, a
latched output will remain in the alarm condition until it is
reset by a front panel pushbutton, via the serial interface,
or via the rear connector.
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 3
Ordering Guide
Create a model a model number in this format: L1110P385C, IPC
DPM Type L Laureate Digital Panel Meter
Main Board 1 Standard Main Board, Green LEDs
2 Standard Main Board, Red LEDs
Power
(isolated)
Relay Output
(isolated)
Analog Output
(isolated)
Digital Interface
(isolated)
RTD Signal
(isolated)
Add-on Options BL Blank Lens without Button Pads
0 85-264 Vac
1 12-32 Vac or 10-48 Vdc
0 None
1 Two 8A Contact Relays
2 Two 120 mA Solid State Relays
3 Four 8A Contact Relays
4 Four120 mA Solid State Relays
0 None
1 Isolated 4-20 mA, 0-20 mA, 0-10 V, -10 to +10V
0 None
1 RS232
2 RS485(dual RJ11 connectors)
4 RS485 Modbus (dual RJ45 connectors)
5 USB
6 USB-to-RS485 device server
7 Ethernet
8 Ethernet-to-RS485 device server
P385C Pt 100 DIN RTD, -202°C to 850°C
P385F Pt 100 DIN RTD, -331°F to 1562°F
P392C Pt 100 ANSI RTD, -202°C to 631°C
P392F Pt 100 ANSI RTD, -331°F to 1168°F
N672C Ni 120 RTD, -100°C to +260°C
N672F Ni 120 RTD, -148°F to +500°F
C427C Cu 10 RTD, -100°C to +260°C
C427F Cu 10 RTD, -148°F to +500°F
CBL01 RJ11-to-DB9 Cable
CBL02 USB-to-DB9 Adapter
CBL05 USB Cable, A to B
IPC Splash-proof Cover
BOX1 NEMA-4 Enclosure
BOX2 NEMA-4 Enclosure plus IPC
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 4
Mechanical
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 5
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