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Laurel Electronics provides
digital panel meters / controllers, totalizers, counters, loop-powered meters,
temperature meters, for all types of transducers or process indication &
control. |
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Laureate™
Thermocouple & RTDTemperature Panel Meters
(High
accuracy plus linearized transmitter & control outputs) |
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Features |
| Input
for thermocouple types J, K, T, E, N, R, S. |
Input
for 100 ohm platinum RTDs with DIN and ANSI curves |
| High
accuracy & repeatability. |
99.99%
full scale accuracy. |
| 4
1/2 digit resolution to ±19,999 for direct readout
in mV, V, mA or A. |
Celsius,
Fahrenheit, Kelvin or Rankine scales. |
| Selectable
1º or 0.1º resolution. |
2,
3 or 4-wire RTD connection with lead resistance
compensation. |
| Upscale
or downscale open sensor indication. |
Up
to 60 conversions per second. |
| Peak
value display. |
AC
or DC powered. |
| Green
or red display. |
NEMA
4X, 1/8 DIN case. |
| Optional
dual relays, 4-20 mA & 0-10 V analog output,
RS-232/485 I/O, parallel BCD output, and low voltage
AC or DC power. |
Certified
to UL 3101-1, CAN/CSA-C22.2, EN 61010-1 (CE Mark). |
Click
to Order RTD Panel Meter
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Description |
| Laureate™
digital panel meters with the temperature signal
conditioner board provide highly accurate, stable
and repeatable temperature indication 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 type, range and
resolution (1° or 0.1°) are selectable from
the front panel or via the serial interface. Display
in Kelvin or Rankine can be selected by offsetting
the Celsius or Fahrenheit range.
Cold junction
compensation automatically corrects for temperature
variations at the thermocouple reference junction at
the meter. Open sensor indication is standard and
may be set up to indicate either upscale or
downscale. RTD excitation is provided by the meter.
RTD connections can be of the 2-, 3- or 4-wire type.
For 3- and 4-wire connections, the meter
automatically compensates for lead resistance of the
sensor.
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 meters.
All Laureate
digital panel meters 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 control
applications. Display of peak value is standard.
Plug-in isolated
analog output, dual-setpoint controller and
RS-232/485 communications or BCD output boards can
upgrade the Laureate from stand-alone monitor to
system interface and control. The Laureate
temperature meter can serve as a highly accurate,
isolated, 4-20 mA transmitter.
Laureate panel
meters are available with a red or green LED
display. Blanking of leading, non-significant zeros
simplifies reading. The 1/8 DIN case is water tight
to NEMA 4X (IP-65) from the front when mounted in
the panel. |
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Click
to Order RTD Panel Meter
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Specifications |
| Thermocouple
Input |
| TC
Type |
Range |
Conformity
Error |
| J |
-210°C
to +760°C
-347°F to +1400°F |
0.09°C
0.16°F |
| K |
-244°C
to +1372°C
-408°F to +2501°F |
0.1°C
0.17°F |
| T |
0°C
to +400°C
-257°C to 0°C
+32°F to 752°F
-430°F to +32°F |
0.03°C
0.2°C
0.05°F
0.36°F |
| E |
-240°C
to +1000°C
-400°F to +1830°F |
0.18°C
0.32°F |
| N |
-245°C
to +1300°C
-410°F to +2370°F |
0.10°C
0.17°F |
| R |
-45°C
to +1768°C
-49°F to +3214°F |
0.17°C
0.31°F |
| S |
-46°C
to +1768°C
-51°F to +3213°F |
0.12°C
0.22°F |
| Applicable
to all TC types |
| Calibration |
NIST
Monograph 125 (IPTS-68) |
| Input
resistance |
1
Gohm |
| Input
current |
100
pA |
| Max
lead resistance |
1
Gohm max for rated accuracy |
| Span
tempco |
±0.003%
of reading/ºC |
| Reference
junction tempco |
±0.02
deg/deg |
| Span
tempco |
±0.003%
of reading/ºC |
| Overvoltage
protection |
125
Vac |
| NMR
at 50/60 Hz |
80
dB plus selectable digital filter from 80 ms
to 9.6 s time constant |
| CMR,
DC-60 Hz |
120
dB with 500 W imbalance |
| CMV,
DC-60 Hz |
250
Vac from power and earth grounds |
| Open
sensor indication |
Flashes
full-scale |
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| Pt
100 RTD Input |
| RTD
Alpha |
Range |
Conformity
Error |
DIN
.00385 |
-202°C
to +850°C
-331°F to +1562°F |
0.03°C
0.05°F |
ANSI
.003925 |
-202°C
to +631°C
-331°F to +1168°F |
0.04°C
0.07°F |
| Applicable
to all RTD types |
| Calibration,
DIN |
IEC
751 (IPTS-68) |
| Calibration
ANSI |
NIST
Monograph 126 |
| Configuration |
2,
3 or 4-wire connection |
| Excitation
current |
0.2
mA |
| Span
tempco |
±0.003%
of reading/ºC |
| Zero
tempco |
±0.03
deg/deg |
| Sensor
lead resistance |
2-wire,
10 mdeg/W/deg up to 10 W |
|
tempco per conductor |
3
& 4-wire, 10 mdeg/W/deg up to 100 W |
| Overvoltage
protection |
125
Vac |
| Open
sensor indication |
Flashes
full-scale |
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| Thermocouple
& RTD |
| Display |
A-to-D
Conversion |
Power |
Environmental |
Readout
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5
digits, 7-segment, 14.2 mm (.56")
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Technique |
Concurrent
Slope™ (Pat 5,262,780) |
Voltage,
std. |
85-264
Vac and 90-370 Vdc |
Operating
Temperature |
0°C
to 55°C |
| Color |
Red
or green LED |
A-to-D
Rate |
60/s
at 60 Hz, 50/s at 50 Hz |
Voltage,
opt.
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8-28
Vac and 9-37 Vdc |
Storage
Temperature |
-40°C
to 85°C |
| Indicators |
Minus
sign, 2 red LED lamps |
Output
Update |
56/s
at 60 Hz, 47/s at 50 Hz |
Frequency |
DC
or 49-440 Hz |
Relative
Humidity
Protection |
95%
at 40°C, non-condensing
NEMA-4X (IP-65) when panel mounted |
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Display
Update |
3.5/s
at 60 Hz, 3/s at 50 Hz |
Power
isolation |
Safety-rated
to 250 Vac, meter ground to earth ground,
DC to 60 Hz, 4.2 kVp per High Voltage Test |
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Click
to Order RTD Panel Meter
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RTD
Connections with Excitation & Lead Compensation |
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The Laureate
temperature meter allows 2-, 3- and 4-wire RTD hookup to
the J5 connector. The meter applies an excitation current
of 0.2 mA, which it monitors to make ratiometric
corrections for excitation supply variations. |
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In
2-wire hookup, the meter 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 meter setup. |
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In 3-
and 4-wire hookup, the meter 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 it to determine the effect of one lead wire and
mathematically subtract the effect of both lead wires. |
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Sample
Applications |
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Operation
as a 4-20 mA Transmitter |
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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 ºC or ºF 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 closed-loop and
PID control applications. |
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Operation
as a Fast Controller |
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With
the optional 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. |
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Operation
as a Supervisory Monitor |
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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 |
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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. |
Click
to Order RTD Panel Meter
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FLW,
Inc - 3505
Cadillac Ave - Bldg E - Costa Mesa, CA. - 92626 - USA - Ph (714) 751 -
7512 - Fax (714) 751 - 0213
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