HEL-700 Series Temperature Sensors Datasheet by Honeywell Sensing and Productivity Solutions

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MICRO SWITCH Sensing and Control
Temperature Sensors HEL-700 Series PLATINUM RTDs
FUNCTIONAL BEHAVIOR
RT = R0(1+AT+BT2-100CT3+CT4)
RT = Resistance (W) at temperature T (°C)
R0 = Resistance (W) at 0°C
T = Temperature in °C
A = a + a d B = -a d CT<0 =-a b
100 1002 1004
CAUTION
PRODUCT DAMAGE
The inherent design of this component causes it to be
sensitive to electrostatic discharge (ESD). To prevent
ESD-induced damage and/or degradation, take normal
ESD precautions when handling this product.
Trim
Tolerance
Standard
±0.2%
Optional
±0.1%
Temperature
(°C)
±R
()
±T
(°C)
±R
()
±T
(°C)
-200 6.8 1.6 5.1 1.2
-100 2.9 0.8 2.4 0.6
0 2.0 0.5 1.0 0.3
100 2.9 0.8 2.2 0.6
200 5.6 1.6 4.3 1.2
300 8.2 2.4 6.2 1.8
400 11.0 3.2 8.3 2.5
500 12.5 4.0 9.6 3.0
600 15.1 4.8 10.4 3.3
ACCURACY VS TEMPERATURE
EL-700 platinum RTDs are available in two base
resistance trim tolerances: ±0.2% or ±0.1%. The
corresponding resistance interchangeability and tempera-
ture accuracy for these tolerances are:
NIST CALIBRATION
NIST traceable calibration provides resistance readings at
1, 2 or 3 standard temperature points to yield a resis-
tance versus temperature curve with up to 10 times better
accuracy. A calibration report is as follows:
Calibration 1 Point 2 Point 3 Point
T(°C) ±
T (°C) ±
T (°C) ±
T (°C)
-200 0.9 -- --
-100 0.5 0.27 0.15
0 0.03 0.03 0.03
100 0.4 0.11 0.08
200 0.8 0.2 0.1
300 1.2 0.33 0.13
400 1.6 0.5 0.17
500 2.0 0.8 0.25
600 2.6 1.2 0.33
CONSTANTS
Alpha,
α
(°C
-1
)0.003750
±0.000029 0.003850
±0.000010
Delta
, δ
(°C) 1.605 ± 0.009 1.4999 ± 0.007
Beta
, β
(°C)
0.16 0.10863
A
(°C
−1
)3.81x10
-3
3.908x10
-3
B
(°C
−2
) -6.02x10
-7
-5.775x10
-7
C
(°C
−4
)
-6.0x10
-12
-4.183x10
-12
Both
β
= 0 and C = 0 for T > 0°C
RESISTANCE VS TEMPERATURE CURVE
P __4
2 Honeywell  MICRO SWITCH Division For application help, call 1-800-537-6945
PLATINUM RTDs Temperature Sensors HEL-700 Series
ELECTRICAL INTERFACING
Fig. 1 illustrates the most common method of measur-
ing an RTD. As RT increases or decreases with tempera-
ture, Vo increases or decreases. An op-amp is used to
observe Vo. Lead wire resistance, L1 and L2, add to the
RTD leg of the bridge and may affect the temperature
reading.
Fig. 2 is a simple circuit that provides a voltage output
linear to within 0.1% or a ±0.3°C (0.5°F) error over a
range of -40°C to +150°C (-40°F to +302°F).
Fig. 3 illustrates one way to detect one particular
temperature, if required in an application. The potentiom-
eter may be adjusted to correspond to the desired
temperature.
MOUNTING DIMENSIONS (for reference only) mm/in
HEL-705
HEL-707
HEL-711, HEL-712
HEL-716, HEL-717
4,75
0.08
2,18
0.19 305,0
12.0
Teflon
0.08
6,35
0.25
2,18
305,0
12.0
Fiberglass
Teflon or Fiberglass
2,80
0.11
15,24
0.60 305,0
12.0
3,18
0.12
15,24
0.60
Teflon or Fiberglass
305,0
12.0
Fig. 3: Adjustable Point (Comparator) Interface
Fig. 2: Linear Output Voltage
1K 10K10K10K10K10K10K10K10K
10K10K10K10K10K10K10K10K
V
R=IV
1K
9K
-Vs
-
+Vs
+
+10V
10K10K10K10K10K10K10K10K
10K10K10K10K10K10K10K10K
RT-Vs
-
+
+Vs
T
Vo=.001R
RT
2K
2K
Vs=5V
-
+
Vo
2K
5K
2K
Fig. 1: Wheatstone Bridge 2-Wire Interface
L
1
L
2
R
T
R
3
R
2
R
1
V
o
+Vs
Honeywell Honeywell
MICRO SWITCH Sensing and Control
Temperature Sensors HEL-700 Series PLATINUM RTDs
MICRO SWITCH
Honeywell Inc.
11 West Spring Street
Freeport, Illinois 61032
Printed with Soy Ink
on 50% Recycled Paper
WARRANTY and REMEDY
Honeywell warrants goods of its manufacture as being
free of defective materials and faulty workmanship.
Contact your local sales office for warranty information.If
warranted goods are returned to Honeywell during the
period of coverage, Honeywell will repair or replace
without charge those items it finds defective. The
foregoing is Buyers sole remedy and is in lieu of all
other warranties, expressed or implied, including
those of merchantability and fitness for a particular
purpose.
While we provide application assistance, personally,
through our literature and the Honeywell website, it is up
to the customer to determine the suitability of the
product in the application.
Specifications may change at any time without notice.
The information we supply is believed to be accurate and
reliable as of this printing. However, we assume no respon-
sibility for its use.
For application assistance, current specifications,
or name of the nearest Authorized Distributor, contact
a nearby sales office. Or call:
1-800-537-6945 USA
1-800-737-3360 Canada
1-815-235-6847 International
FAX
1-815-235-6545
INTERNET
www.honeywell.com/sensing
info@micro.honeywell.com

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