1551A Ex/1552A Ex
Intrinsically Safe
“Stik” Thermometer
The new “gold standard”
of industrial temperature
calibration
Designed
to go where
you work
Finally, a digital substitute
for your mercury-in-glass
thermometers! Accurate
and repeatable to ± 0.05 °C
over its full range, the
1551A/1552A “Stik”
Thermometer is the new
“gold standard” of industrial
temperature calibration.
Whether working outdoors
in environments where
potentially explosive gases
may be present or on the
floor of a processing plant,
the intrinsically-safe, battery-
operated, portable reference
thermometer is designed to
go where you work.
Features at a glance
Accuracy of ± 0.05 °C (± 0.09 °F)
•
over full range
Intrinsically safe (ATEX and
•
IECEx compliant)
Two models to choose from
•
(-50 °C to 160 °C or -80 °C to 300 °C)
User-configurable temperature
•
trend/stability indicator
2 2
Display temperature in °C or °F
•
Optional data logging to internal memory
•
300-hour battery life
•
Percent battery-life and low-battery indicator
•
NVLAP-accredited, NIST-traceable calibration
•
included
Thermometer probe and digital
readout combined into one unit
The stainless steel probe and digital readout are
fixed together and calibrated as a system. The
accuracy specification is easy to understand since
it includes all uncertainty components, including
drift, for up to one year
display rotates 90° making it easy to read from
any angle. A user-configurable stability/trend
indicator lets you know when your temperature is
stable enough to record an accurate measurement.
A user-settable auto-off function extends typical
battery life to three hundred hours. A low-battery
indicator and stop-measure function prevent
erroneous measurements from being made due to
low battery life. A simple three-point calibration
function allows you to easily and accurately
calibrate the “Stik” Thermometer. Data logging to
internal memory of up to 10,000 time-stamped
measurements is optionally available.
1
. The large backlit LCD
Why calibrate process
temperature sensors?
Because temperature greatly effects the
accuracy of a volumetric measurement, process
manufacturers of chemical, pharmaceutical, food or
petroleum products require accurate temperature
measurements—especially for processes where
quality or custody transfer are regulated by
government agencies. Since all temperature
sensors are subject to drift with time, regular
calibration or verification against a reliable
reference thermometer is required. Finding a
reference thermometer that is accurate, repeatable
and robust, however, can be challenging.
What’s wrong with my
reference thermometer?
Industrial reference thermometers available
on the market today, such as mercury-in-glass
thermometers (or “ASTM thermometers”) and
portable electronic thermometers are useful, but
both come with inherent problems. Although
accurate and repeatable, mercury thermometers are
fragile. The risk of a mercury spill poses potential
hazards to the environment and to the health of
personnel. Many of the United States and European
Union countries have already banned their use in
industrial applications. Some organizations have
replaced their mercury thermometers with more
durable portable electronic thermometers, only to
discover that the RTD probes lack the repeatability
and dependability required of a legitimate
reference thermometer.
The best alternative to
mercury thermometers
The Fluke “Stik” Thermometer is accurate, stable
and durable, making it the best alternative to
mercury thermometers and existing electronic
thermometers. The thin-film RTD sensor
incorporates the same characteristics of other
premium reference thermometers designed by
Hart Scientific, but it is more robust and less
susceptible to drift. Accuracy and repeatability,
however, are not sacrificed for improved durability.
Using a glass-stem mercury- or spirit-filled
thermometer at different immersion depths, or
at significantly different ambient temperatures
from which it was calibrated, may require the
application of emergent-stem corrections that can
be tedious but necessary to calculate an accurate
measurement. This isn’t required with the “Stik”
Thermometer. The sensor of the 1551A Ex
requires a minimum immersion depth of only
7 cm (2.8 in), with no appreciable effect on the
measured temperature due to heat loss through
stem conduction.
Some digital thermometers can become less
accurate when used outside a narrow range of
ambient temperatures. This isn’t the case for
the “Stik” Thermometer. Your measurement
remains accurate in ambient temperatures
from -10 °C to 50 °C (14 °F to 122 °F).
With a superior probe design combined
with electronic functions that assist
accurate measurement, the “Stik”
Thermometer surpasses the
capabilities of other digital
thermometers and is
the perfect substitute
for your mercury
thermometers.
1
In order to minimize sensor
drift, the probe should
always be protected
from mechanical shock.
3
Easy-to-use,
one-handed
menu navigation
7 8
6
1
2
543
The digital display and probe
1
are fixed together as a system.
The hinge allows the display
to rotate 90° to easily view the
measurement from any angle.
Easily power up with the press
2
of a button and after a short selftest, start making measurements
within seconds. The power key is
slightly recessed inside the plastic
molded case to protect against
accidental power off.
Max/Min/Trend/Up key allows you
3
to see the maximum or minimum
temperature since the most recent
power up. The trend function tells
you the positive or negative rate
of temperature change in degrees
per minute.
The Setup/Down key lets you step
4
through submenus and adjust
field values down.
The Enter/Backlight key allows
5
you to accept changes while in
the setup menus or turn on the
backlight.
User-selectable resolution
6
(0.1, 0.01, 0.001)
7
Temperature displayed in °C or °F.
The stability/trend indicator tells
8
you if your temperature source
is trending upward or downward
(pictured trending up). A flat
bar indicates that the
temperature source and
thermometer are stable within
the user-selected stability window
(0.01, 0.1, 1.0, 10.0).
4
4
Five reasons to replace mercury thermometers
1. Since the “Stik” Thermometer does not
contain mercury, it is not subject
to government-imposed bans.
Government agencies worldwide have
either banned or are seeking to ban
the use and transportation of industrial
mercury thermometers—this seems to
be a growing trend.
2. The stainless steel probe sheath of the
“Stik” Thermometer is far more robust
than the glass stem of a mercury
thermometer and better suited for
industrial environments. And since the
“Stik” thermometer does not contain
mercury, the risk of an accidental
mercury spill is eliminated.
3. When considering cost of ownership,
a digital thermometer is less expensive
than a mercury thermometer. With
a mercury thermometer, you either
invest in equipment or you hire out to
clean up after a mercury spill.
4. Mercury thermometers cannot be
adjusted after calibration. The actual
temperature must be calculated by
applying corrections to the measured
temperature. This costs time and is
susceptible to calculation error. A
digital thermometer does the math
for you—the displayed temperature
accurately represents the actual
measured temperature.
5. Emergent-stem corrections may
also be required if the mercury
thermometer is not used under the
same conditions under which it was
calibrated. A digital thermometer
doesn’t require that you match
calibration conditions to achieve
an accurate measurement. You’re
only required to meet the minimum
immersion requirements—which is
only 7 cm (2.8 in) in the case of
the 1551A Ex.
5
5
1551A Ex/1552A Ex Specications
Specifications 1551A Ex 1552A Ex
Temperature range -50 °C to 160 °C
(-58 °F to 320 °F)
Accuracy (1 year) ± 0.05 °C (± 0.09 °F)
Display units °C, °F
Sensor type 100 Ω thin-film RTD 100 Ω wire-wound PRT
Probe temperature coefficient 0.00385 Ω/Ω/°C nominal
Sensor length ≤ 10 mm ≤ 30 mm
Sensor position (from sheath tip) 3 mm (0.1 in)
Minimum immersion depth
1
7 cm (2.8 in) 12 cm (4.8 in)
Probe sheath material SST
Response time 4.8 mm diameter probe (3/16 in): 14 seconds
6.35 mm diameter probe (1/4 in): 21 seconds
Probe hysteresis ± 0.01 °C
Temperature resolution Selectable: 0.1, 0.01, 0.001 (default 0.01)
Sample rate Selectable: 0.5 seconds, 1 seconds, 2 seconds (default 1 seconds)
Operating temperature range
-10 °C to 50 °C (14 °F to 122 °F)
readout
Storage temperature -20 °C to 60 °C (-4 °F to 140 °F)
0 % to 95 % RH, non-condensing
2
Optional data logging
Logging intervals
Up to 10,000 time-stamped readings stored to internal memory
2
2 seconds, 5 seconds, 10 seconds, 30 seconds, or 60 seconds;
2 minutes, 5 minutes, 10 minutes, 30 minutes, or 60 minutes
Damping Moving average of the most recent 2 to 10 readings
(ON/OFF, 2, 5, 10)
Communications RS-232 stereo jack (access calibration parameters only)
AC power None
DC power Three AAA batteries, typical battery life of 300 hours
without LCD backlight
EMC compliance EN61326:2006 Annex C; CISPR II
Edition 5.0-2009; Class “B”
Enclosure rating IP50
Electronics dimensions
(H x W x D)
114 mm x 57 mm x 25 mm
(4.5 in x 2.25 in x 1.0 in)
Weight 196 g (6.9 oz)
Calibration (included) NVLAP-accredited, NIST-traceable
Characterization CVD ITS-90
1
Per ASTM E 644
2
See ordering information for optional data logging configurations
-80 °C to 300 °C
( -112 °F to 572 °F)
6
6
Ordering information
1551A Ex
1551A-9 Thermometer, Fixed RTD,
-50 °C to 160 °C,
4.8 mm x 229 mm (3/16 in x 9 in)
1551A-12 Thermometer, Fixed RTD,
-50 °C to 160 °C,
6.35 mm x 305 mm (1/4 in x 12 in)
1551A-20 Thermometer, Fixed RTD,
-50 °C to 160 °C,
6.35 mm x 508 mm (1/4 in x 20 in)
1551A Ex Datalogging options
1551A-9-DL Thermometer, Fixed RTD,
-50 °C to 160 °C,
4.8 mm x 229 mm (3/16 in x 9 in)
with Datalog
1551A-12-DL Thermometer, Fixed RTD,
-50 °C to 160 °C,
6.35 mm x 305 mm (1/4 in x 12 in)
with Datalog
1551A-20-DL Thermometer, Fixed RTD,
-50 °C to 160 °C,
6.35 mm x 508 mm (1/4 in x 20 in)
with Datalog
1552A Ex
1552A-12 Thermometer, Fixed PRT,
-80 °C to 300 °C,
6.35 mm x 305 mm (1/4 in x 12 in)
1552A-12-DL Thermometer, Fixed PRT,
-80 °C to 300 °C,
6.35 mm x 305 mm (1/4 in x 12 in)
with Datalog
Accessories
1551-CASE Case, 1551-2, Carrying
1551-CBL Cable, RS-232 155X
Standard accessories include: NVLAP-accredited report
of calibration, User’s Guide on CD-ROM, three AAA batteries
Note: Model number appended with a -9, -12, -20
indicates probe sheath length in inches. All probe diameters
are 6.35 mm (1/4 in) with the exception of the 1551A-9,
which is 4.8 mm diameter (3/16 in).
7
7
Fluke Calibration.
Precision, performance, confidence.
Fluke Calibration
PO Box 9090, Everett, WA 98206 U.S.A.
Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands
For more information call:
In the U.S.A. (800) 443-5853 or
Fax (425) 446-5116
In Europe/M-East/Africa +31 (0) 40 2675 200 or
Fax +31 (0) 40 2675 222
In Canada (800)-36-FLUKE or
Fax (905) 890-6866
From other countries +1 (425) 446-5500 or
Fax +1 (425) 446-5116
Web access: http://www.fluke.com
©2010 Fluke Corporation.
Specifications subject to change without notice.
Printed in U.S.A. 11/2010 3947275A B-EN-N
Pub-ID 11698-eng
Modification of this document is not permitted
without written permission from Fluke Corporation.
™
2
Loading...