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PUSH
BUTTON
THERMOCOUPLE
TEMPERATURE
TRANSMITTER
SEM203TC
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- PUSH
BUTTON
TC
Selection
- PUSH
BUTTON
Ranging
- Galvanically
Isolated
- Temperature
Linear
- Low
Cost
- 8
Standard
Thermocouples
Types
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INTRODUCTION
The
SEM203TC
is
the
latest
in
a
series
of
temperature
transmitters
from
SandeliusInstruments
that
do
not
require
a
PC,
trim
pots,
switches
or
jumpers
in
order
to
calibrate.
Instead,
the
SEM203TC
uses
a
simple
push
button
on
the
unit
to
both
select
the
thermocouple
type
and
range
the
transmitter.
The
SEM203TC
incorporates
the
latest
digital
technology
assuring
drift
free
linearization,
not
available
with
analog
designs.
Galvanic
isolation
is
standard.
The
SEM203TC
is
available
in
three
versions,
each
accepting
a
choice
of
three
different
thermocouple
types.
An
on
board
LED
indicates
the
successful
completion
of
ranging,
TC
selection
and
provides
indication
of
sensor
health.
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Thermocouple
Selection
1.
Depress
and
hold
button
down
and
then
apply
power
to
the
unit.
2.
Release
button.
3.
Depress
button
one,
two
or
three
times
to
select
specific
thermocouple
type.
(Model
dependant.
For
Model
SEM203TC-1:
once
for
"K",
twice
for
"J",
three
times
for
"T").
The
LED
will
blink
with
each
depression.
After
several
seconds
the
LED
will
flash
the
number
times
corresponding
to
the
TC
selected.
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Ranging
1.
Connect
a
thermocouple
simulator
to
input
and
a
24
VDC
power
supply
to
output.
2.
Set
the
simulator
to
the
temperature
desired
at
4ma.
Press
and
HOLD
the
button
down
until
the
LED
starts
to
blink.
3.
Set
the
simulator
to
the
temperature
desired
at
20ma.
Press
and
release
the
calibration
button.
The
LED
blinks
and
then
stops,
confirming
the
unit
is
calibrated.
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ORDER
CODE
.SEM203TC/1
Thermocouples
K,
J,
&
T
.SEM203TC/2
Thermocouples
R,
S,
&
B
.SEM203TC/3
Thermocouples
J,
F,
&
E
.For
SEM203TC
Special
Configuration
Ranges
and
Downscale
Burnout
.please
contact
sales
office. |
SPECIFICATION
@
68
°F
INPUT
/
OUTPUT
SENSORS
AND
RANGES
| .INPUT |
.SEM203TC |
| .Sensor
&
Range |
.SEM203TC/1
.K
(-328
to
2498°F)
.J
(-328
to
2192°F)
.T
(-328
to
752°F)
.SEM203TC/2
.R
(0
to
3200°F)
.S
(0
to
3200°F)
.B
(0
to
3308°F)
.SEM203TC/3
.J
(-328
to
2192°F)
.F
(-328
to
2192°F)
.E
(-328
to
1832°F)
.Other
combinations
available
.to
special
order |
| .Default
Range |
.203TC/1
=
K
(0
to
1832°F)
.203TC/2
=
R
(0
to
2912°F)
.203TC/3
=
J
(0
to
1832°F) |
| .Accuracy |
.±0.04%
FS,
±0.04%
Rdg
or
0.9°F
.(which
ever
is
greater) |
| .Linearization
Standard |
.BS4937
/
IEC
584-1 |
| .Input
/
Output
Isolation |
.50VDC
(tested
to
200V) |
| .Cold
Junction
Error |
.±0.3°F |
| .Cold
Junction
Tracking |
.0.03°F/°F |
| .Cold
Junction
Range |
.-4
to
158°F |
| .Thermal
Drift |
.Zero
=
±2.3µV/°F
Typical |
| .Span
=
100
ppm |
| .Sample
Rate |
.500ms
per
sample |
| .Minimum
Span |
.20°F |
| .Sensor
Lead
Length |
.Max
length
10
feet
to
Maintain
CE
Compliance |
| .Terminals |
.Screw
Terminals |
OUTPUT
| .Output
Range |
.4
to
20
ma
-
2
Wire
Loop
Powered
.(Can
be
ranged
20
to
4
ma) |
| .Max.
Output
Range |
.3.8
to
22
ma |
| .Operating
Voltage |
.8
to
30
V |
| .Accuracy |
.±5
µA |
| .Burnout |
.Up-Scale
22ma
(Down-Scale
to
order)
.Red
programming
LED
comes
on
when
.temperature
is
outside
operating
range |
| .Thermal
drift |
.0.17
µA/°F |
| .Response
Time |
.500
ms
to
Reach
70%
of
Final
Value |
| .Loop
Resistance |
.Max.
800
ohms
@
24
VDC |
| .Loop
Sensitivity |
.0.4
µA/V |
| .Protection |
.Reverse
connection
protected |
| .Terminals |
.Screw
Terminals |
| .Warm-up
Time |
.2
minutes
to
full
accuracy |
| .Display |
.Slow
flash
indicates
programming
mode
.Full
on
indicates
out
of
range
sensor |
| .Switch |
.Momentary
Push
Button |
APPROVALS
| .EMC |
.Emissions |
.BS
EN
50081-1 |
| .Susceptibility |
.BS
EN
50082-2 |
ENVIRONMENTAL
| .Ambient
operating
range |
.-4
to
158
°F |
| .Ambient
storage
temperature |
.-40
to
194
°F |
| .Ambient
humidity
range |
.0
to
95%
RH
(non-condensing) |
ENCLOSURE
| .Material |
.ABS |
| .Flammability |
.UL
94
HB |
| Calibration
Period |
.12
months
to
maintain
published
specifications.
.5
years
to
twice
specifications. |
| Warranty |
.5
years |
SEM203TC
Instruction
Manual
Call
(713)
861-1100
for
literature
and
pricing.
If
you
prefer
to
ask
for
information
via
the
internet,
email
info@sandelius.com.
© 2001 Sandelius Instruments, Inc.
- All Rights Reserved
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