1523/1524 Reference
Thermometers
Measure, graph and record
three sensor types with one tool
Technical Data
Finally, a reference thermometer
as versatile as you are
The new 1523/24 Reference Thermom-
eters from Fluke Calibration measure,
graph, and record PRTs, thermocouples,
and thermistors. These new thermometer
readouts deliver high accuracy, wide mea-
surement range, logging, and trending, all
in a handheld tool you can take anywhere.
The 1523/24
lets you handle
field applications,
laboratory measure-
ments, and data
logging with ease.
And with the dual
channel measure-
ment capabilities
of the model 1524,
you can do twice
the work in half
the time.
Make accurate,
consistent
measurement...anywhere
You need accuracy for compliance, prod-
uct yields, energy savings, and consistent
results. The 1523/24 uses current reversal,
a technique used in high-end instruments
that eliminates thermal EMFs, for precision
temperature measurements. Specifications
are guaranteed from –10 °C to 60 °C
ambient. Special precision resistors and
a highly stable reference voltage source
keep 1523/24 accuracy virtually insensi-
tive to environmental temperature.
Like all Fluke handheld tools, the
1523/24 Reference Thermometers endure
rigorous testing in temperature extremes
and under harsh conditions of vibration, so
you can take it with confidence anywhere
you need to go. An optional magnetic
hanger allows you to hang the thermom-
eter for easy viewing while freeing your
hands to focus on the job.
• High accuracy
• PRTs: up to ± 0.011 °C
• Thermocouples: up to ± 0.24 °C
• Precision thermistors: ± 0.002 °C
Two models
• 1523: Single channel
standard model with
memory for 25 readings
• 1524: Two channels;
memory for logging
15,000 measurements;
real-time clock for time
and date stamps
1 RS-232 serial interface connector. For
PC communications, uploading and down-
loading data from memory and from the
probe INFO-CON connectors.
2 Sensor connector (PRT, thermocouple, or
thermistor)
4 External power adapter connection, for
continuous use without changing batteries.
Alternatively, 3 AA batteries will last more
than 20 hours in the field.
The 1523 Reference Thermom-
eters are versatile single-channel
thermometers that measure,
graph and record three sensor
types with one tool. Support for
PRTs/RTDs, thermocouples, and
thermistors provide flexibility to
choose the right probe for the job.
Two models let you make the
best choice for your application
Monitor trends in the lab or in
the field
See trends graphically on the 1523/24
thermometer’s 128x64-backlit LCD
display. You can change the graph’s
resolution at the touch of a button. Now
it is easy to see when the temperature
is stable (without statistics or long de-
lays) or to monitor processes over time
to verify correct operation.
Hold readings on the display at the
touch of a button, or document up to 25
readings and associated statistics for
easy retrieval. Statistics include the av-
erage maximum and minimum values,
and the standard deviation. View them
through the display or by uploading
it to a PC via RS-232 connection and
9940 I/O TookKit software, included
free. To monitor and log more data over
time, use a PC and optional LogWare II
software.
RS-232-to-USB adapters are avail-
able for those who prefer USB connec-
tors. Battery power lasts at least 20
hours on three AA batteries, or use the
dc power adapter for extended periods
of measurement. Power saving features
can be enabled or disabled for longer
battery life or greater convenience.
INFO-CON connectors ensure
correct temperature conversion
Inside the INFO-CON, a memory chip
keeps calibration information for the
attached probe. Simply plugging in the
probe uploads the information to the
readout. The connector transfers this
information to the 1523/24 automati-
cally, ensuring the correct temperature
conversion for accurate, hassle-free
measurements.
Probes may be locked by password
to specific channels and readouts
for security or for system calibration
traceability. Plug any thermocouple
with mini-thermocouple jacks into
an optional universal thermocouple
adapter for convenient measurement.
Each thermocouple adapter or standard
connector supports reference junction
compensation (RJC) with its own inter-
nal precision thermistor.
The new 1524 Reference
Thermometers help you do twice
the work in half the time. Two
channels and three sensor types
and high-speed measurement
make you more productive and
make model 1524 the one refer-
ence thermometer you need to
own. It has all the features
of the 1523, and it’s a data
logger too. A real-time clock and
memory for 15,000 time and
date stamped measurements
mean everything you are going
to need is in this package. Log
up to three times per second, or
once every hour or other options
in between. Download the data
to a PC for analysis when you
need it.
1 RS-232 serial interface connector
2 Channel 1 sensor connector (PRT,
thermocouple, and thermistor)
3 Channel 2 sensor connector (PRT,
and thermistor)
4 External power adapter connection
1523 single-channel
thermometer
1524 two-channel
thermometer
2 Fluke Calibration 1523/1524 Reference Thermometers
Specifications
1523 1524
Input channels 1 2
Resolution PRTs and thermistors: 0.001°
thermocouples: 0.01°
Logging 25 readings with statistics 25 readings with
statistics15,000 time
and date stamped
Sample interval (normal) 1 second 1 second
(simultaneous
measurement)
Typical sample interval (fast mode)* 0.3 seconds
Sensor types PRTs, RTDs, thermistors, and thermocouples
Thermocouple types C, E, J, K, L, M, N, T, U, B, R, S
Statistics Maximum, minimum, average, standard deviation
Trending Scale: ± 10 °C (18 °F), ± 1 °C (1.8 °F), ± 0.1°C (0.18 °F),
± 0.01°C (0.018 °F), 10 minutes of real-time data
Power requirements 3 AA alkaline batteries, 12 V dc universal power supply
Size (HxWxD) 96 mm x 200 mm x 47 mm (3.75 in x 7.9 in x 1.86 in)
Weight 0.65 kg (1.4 lb)
Computer interface RS-232, 9940 I/O ToolKit software included
Safety EN61010-1:2001, CAN/CSA C22.2 No. 61010.1-04
Environmental conditions for best accuracy: 13 °C to 33 °C (55.4 °F to 91.4 °F)
Millivolt range and accuracy –10 mV to 75 mV, ± (0.005 % + 5 µV)
Internal reference junction compensation ± 0.2 °C (± 0.36 °F)
Resistance range and accuracy 0 Ω to 400 Ω ± (0.004 % + 0.002 Ω)
200 Ω to 50 kΩ ± (0.01 % + 0.5 Ω)
50 kΩ to 500 kΩ ± (0.03 %)
Temperature coefficient, voltage:
–10 °C to 13 °C , +33 °C to 60 °C
(14 °F to 55.4 °F, 91.4 °F to 140 °F)
± (0.001 %/°C + 1 mV/°C)
Temperature coefficient, resistance:
–10 °C to 13 °C , +33 °C to 60 °C
(14 °F to 55.4 °F, 91.4 °F to 140 °F)
0.0008 %/°C + 0.0004 Ω (0 Ω to 400 Ω)
0.002 %/°C + 0.1 Ω (0 Ω to 50 kΩ)
0.06 %/°C + 0.1 Ω (50 kΩ to 500 kΩ)
Excitation current, resistance 1 mA (0 Ω to 400 Ω)
10 µA (0 Ω to 50 kΩ)
2 µA (50 kΩ to 500 kΩ)
*See technical manual for sample interval details by sensor type and number of inputs.
Equivalent temperature accuracies for
selected sensors derived from primary
specifications (Ω, mV)
Temperature, thermocouples
Type Range Measure accuracies
K–200 °C to 0 °C
(-328 °F to 32 °F) ± 0.61 °C
(± 1.10 °F)
0 °C to 1370 °C
(32 °F to 2498 °F) ± 0.24 °C
(± 0.43 °F)
R–20 °C to 0 °C
(4 °F to 32 °F) ± 1.09 °C
(± 1.96 °F)
0 °C to 500 °C
(32 °F to 932 °F) ± 0.97 °C
(± 1.71 °F)
500 °C to 1750 °C
(932 °F to 3182 °F) ± 0.49 °C
(± 0.88 °F)
S–20 °C to 0 °C
(4 °F to 32 °F) ± 1.05 °C
(± 1.89 °F)
0 °C to 500 °C
(32 °F to 932 °F) ± 0.95 °C
(± 1.71°F)
500 °C to 1750 °C
(932 °F to 3182 °F) ± 0.56 °C
(± 1.01 °F)
Accuracies are based on internal reference junction com-
pensation. Refer to technical manual for greatly improved
accuracies using external reference junctions.
Accuracies of selected readout/probe
combinations (±°C)
Temperature 5616-12 5615-6 5627A-12 5610-9
-200 °C (-328 °F) 0.014 0.025 0.027 n/a
0 °C (32 °F) 0.021 0.021 0.049 0.009
100 °C (212 °F) 0.027 0.028 0.065 0.009
300 °C (572 °F) 0.040 0.043 0.103 n/a
420 °C (788 °F) 0.050 n/a 0.130 n/a
Includes readout accuracy,
probe calibration, and probe drift
Ordering Information
1523* Reference Thermometer, Handheld, 1 Channel
1524* Reference Thermometer, Handheld, 2 Channel, Data Logger
1523-P1 1523 Bundled with 5616 PRT [–200 °C to 420 °C (-328 °F to 788 °F), NIST Traceable Calibration,
100 ohm, 6.35 mm x 305 mm (1/4 in x 12 in)], Universal TC INFO-CON Connector, TPAK, and Case
1523-P2 1523 Bundled with 5628 PRT [–200 °C to 660 °C (-328 °F to 1220 °F), Accredited Calibration, 25 ohm,
6.35 mm x 305 mm (1/4 in x 12 in)], Universal TC INFO-CON Connector, TPAK, and Case
1523-P3 1523 Bundled with 5627A PRT [–200 °C to 420 °C (-328 °F to 788 °F), Accredited Calibration, 100 ohm,
6.35 mm x 305 mm (1/4 in x 12 in)], Universal TC INFO-CON Connector, TPAK, and Case
1524-P1 1524 Bundled, with 5616 PRT, Universal TC INFO-CON Connector, TPAK, and Case
1524-P2 1524 Bundled with 5628 PRT, Universal TC INFO-CON Connector, TPAK, and Case
1524-P3 1524 Bundled with 5627A PRT, Universal TC INFO-CON Connector, TPAK, and Case
*Requires an optional probe
Calibration options
1523-CAL 1523 Accredited Calibration
1524-CAL 1524 Accredited Calibration
1929-2 System Verification, PRT with Readout, Accredited
1929-5 System Verification, Thermistor with Readout, Accredited
1930 System Calibration, PRT with Readout, Accredited
1935 System Calibration, Thermistor with Readout, Accredited
1925-A Accredited Thermistor Calibration, 0 °C to 100 °C (23 °F to 212 °F)
1523/1524 Reference Thermometers Fluke Calibration 3
Calibrated
Temperature
Sensors
Recommended accessories
A wide array of accessories is
available to help you maximize
productivity, but the following
are essential for most users.
TPAK
Magnetic
Hanger
Probe and
Readout
Case
Universal
Thermocouple
Adapter
Universal
RTD Adapter
Included accessories
NIST traceable certificate of calibration, users guide, CD-ROM
(contains technical manual), 12 V dc universal power supply, RS-232
cable, 9940 I/O ToolKit software
Optional accessories
5610-9-P Probe, Precision Thermistor, Stainless Steel,
3.18 mm x 228.6 mm (1/8 in x 9 in), 0 °C to 100 °C
(32 °F to 212 °F), NIST traceable calibration
5615-6-P Probe, PRT, 100 ohm, 4.76 mm x 152.4 mm
(3/16 in x 6 in), –200 °C to 300 °C (-328 °F to 572 °F),
Accredited Calibration
5609-9BND-P Probe, PRT, 25 ohm, 6.35 mm x 305 mm
(1/4 in x 12 in), 90° bend at 9 inches,
–200 °C to 660 °C (-328 °F to 1220 °F),
Requires Calibration (i.e. 1924-4-7)
FLK80P1 80PK-1, Probe, Thermocouple, Beaded Type K
FLK80P3 80PK-3A, Probe, Thermocouple, Surface
Measurement Type K
9935-S Software, LogWare II, Single User
1523-CASE Case, 1523/1524 Readout and Probe Carrying
FLUKETPAK TPAK, Meter Hanging Kit
2373-LPRT Adapter, Lemo to Mini Grabbers (4-wire)
2373-LTC Adapter, Lemo to Universal TC (TC)
2384-P INFO-CON Connector, PRT (Gray Cap), Spare
2384-T INFO-CON Connector, TC (Blue Cap), Spare
4 Fluke Calibration 1523/1524 Reference Thermometers
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. (877) 355-3225 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.flukecal.com
©2011-2012 Fluke Calibration. Specifications subject to change without notice.
Printed in U.S.A. 2/2012 3383390B D-EN-N
Modification of this document is not permitted without written permission
from Fluke Calibration.
Fluke Calibration. Precision, performance, confidence.™
