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“Doing more with less” is a requirement every process manufacturer
faces today. To maintain product quality, reduce waste, improve
efficiency and conform to regulatory standards, instruments that
measure process variables such as temperature and pressure must be
calibrated at regular intervals. Selecting the right calibrator for
the job, however, can be tricky—especially when attempting to
balance precision and versatility with cost. Less expensive than
high-end multi-product calibrators, yet more precise and versatile
than handheld field calibrators, the 7526A is a “best fit” for
instrument shops that value precision, versatility and economy.
The user interface includes cursor controls, function keys and a
ten-key keypad, making it easy to navigate through intuitive menus;
store and recall up to nine setpoints for each input/output
parameter; enter RTD or SPRT coefficients; and easily change
display units with a key press. With two LCD displays, you can
easily view both source and measurement results simultaneously.
For increased efficiency and calibration throughput, or to operate
an automated test system (ATE), combine the 7526A with MET/CAL®
Plus Calibration Management Software. MET/CAL Plus is a powerful
application for creating, editing and testing calibration
procedures and collecting and reporting results on a wide variety
of instruments. It includes MET/CAL® software– the industry leading
software for automated calibration, and MET/TEAM™ Express–a
dedicated system to manage your test and measurement assets. Or
choose MET/TEAM™ standard edition for fully-featured enterprise
calibration asset management, with optional modules for on-site
calibration, commerce management, and customer web portal. The
7526A standard computer interface includes RS-232 and GPIB
(IEEE-488). A USB-to-serial adapter cable is also included with the
calibrator as standard.
Calibrating the electronics portion of a temperature transmitter is
only a part of a complete calibration. You also need to calibrate
the temperature sensor itself, whether an RTD or thermocouple.
Ignoring the sensor can be a mistake, because temperature sensors
are responsible for more than 75% of the output errors in
temperature transmitters. You can calibrate the temperature sensor
individually, or calibrate both the sensor and the transmitter as a
system using a dry-block calibrator such as the Fluke Calibration
914X Series Field Metrology Wells. The Field Metrology Wells were
designed specifically with process calibration in mind—optimizing
speed to temperature, portability, stability and accuracy. The
7526A and a 914X dry-block calibrator make a perfect combination
for calibrating just about any temperature transmitter.
The P5500 series of comparison test pumps can be used with the
7526A and Fluke 700P and 750P series pressure modules to generate
or control test pressures. The unique test port configuration
allows for easy, tool-free connections of a wide variety of
connection sizes and types, including NPT, BSP, and metric threads.
The P5510 includes a built-in hand pump to generate vacuum or
positive pressure up to 300 psi (2 MPa). The P5513 allows for
precise control of pneumatic pressures up to 3000 psi (20 MPa). An
external pressure supply is required. The P5514 allows for
generation of hydraulic pressures up to 10 000 psi (70 MPa). The
P5515 includes a built-in priming pump and screw pump that allows
for pressure generation up to 20 000 psi (140 MPa). Both the P5514
and P5515 can be used with oil or water. Special versions are
available with ethylene propylene seals for use with more
aggressive fluids.
DC voltage, output | |||
Range [1] | Absolute Uncertainty, ± (ppm of output + μV), 1-yr | Resolution | |
0 to 100 mV | 30 | 3 | 1 μV |
0 to 1 V | 30 | 10 | 10 μV |
0 to 10 V | 30 | 100 | 100 μV |
0 to 100 V | 30 | 1 mV | 1 mV |
TC Output and Input | |||
–10 mV to 75 mV | 30 | 2 μV | 1 μV |
[1] All outputs are positive only unless otherwise noted
DC voltage, isolated input | |||
Range | Absolute Uncertainty, ± (ppm of reading + mV), 1-yr | Resolution | |
0 to 10 V | 100 | 0.2 | 100 μV |
10 V to 100 V | 100 | 2.0 | 1 mV |
DC Current, output | |||
Range[1] | Absolute Uncertainty, ± (ppm of reading + μA), 1-yr | Resolution | |
0 to 100 mA | 50 | 1 | 1 μA |
[1] For line voltages less than 95 V, ±100 ppm of reading
DC current, isolated input | |||
Range | Absolute Uncertainty, ± (ppm of reading + μA), 1-yr | Resolution | |
0 mA to 50 mA | 100 | 1 | 0.1 μA |
0 mA to 24 mA [1][2] (Loop Power) | 100 | 1 | 0.1 μA |
[1] Loop Power: 24 V ±10%
[2] HART Resistor: 250 Ω ± 3%
Resistance, output | |||
Range | Absolute Uncertainty, tcal ± 5 °C, ± Ohms, 1-yr | Resolution | Nominal current |
5 Ω to 400 Ω | 0.015 | 0.001 Ω | 1 to 3 mA |
5 Ω to 4 kΩ | 0.3 | 0.01 Ω | 100 μA to 1 mA |
Resistance, input | |||
Range | Absolute Uncertainty, ± (ppm of reading + Ω), 1-yr | Resolution | |
0 Ω to 400 Ω | 20 | 0.004 | 0.001 Ω |
0 Ω to 4 kΩ | 20 | 0.04 | 0.01 Ω |
Sample thermocouple accuracy, input/output (does not include all available TC types)[1] | |||
TC type | Temperature Range (°C) | Absolute Uncertainty, tcal ±5 °C, ± (°C), 1-yr [2] | |
Min | Max | ||
J | -210 | 1200 | 0.09 |
K | -250 | 1372 | 0.1 |
S | -50 | 1767 | 0.29 |
T | -250 | 400 | 0.11 |
[1] See extended specifications for all TC types
(B,C,E,J,K,L,N,R,S,T,U,XK,BP)
[2] Best accuracy within specified TC temperature range
Sample RTD and thermistor, output (does not include all available RTD types)[1] | |||
RTD Type | Temperature Range (°C) | Absolute Uncertainty, tcal ±5 °C, ± (°C), 1-yr | |
Min | Max | ||
Pt 385, 100 Ω | -200 | 800 | 0.05 |
YSI 400 | 15 | 50 | 0.007 |
[1] See extended specifications for all RTD types: Pt-100 (385, 3926, 3916), Pt- 200, Pt-500, Pt-1000, Ni-120, Cu-427, SPRT
Sample RTD and thermistor, intput (does not include all available RTD types)[1] | |||
RTD Type | Temperature Range (°C) | Absolute Uncertainty, tcal ±5 °C, ± (°C), 1-yr | |
Min | Max | ||
Pt 385, 100 Ω | –80 | 100 | 0.020 |
100 | 300 | 0.024 | |
300 | 800 | 0.038 | |
YSI 400 | 15 | 50 | 0.007 |
[1] See extended specifications for all RTD types: Pt-100 (385, 3926, 3916), Pt- 200, Pt-500, Pt-1000, Ni-120, Cu-427, SPRT
General specifications | ||
Standard interface | RS-232, IEEE-488 (GPIB) | |
Temperature performance | Operating: | 0 °C to 50 °C |
Calibration (tcal): | 18 °C to 28 °C | |
Storage: | –20 °C to 70 °C | |
Electromagnetic compatibility | CE: Conforms to EN61326; operation in controlled EM environments | |
Temperature coefficient | Temperature coefficient for temperatures outside tcal 5 °C is 10% of the 90-day specification (or 1 year if applicable) per °C | |
Relative humidity | Operating: | <80% to 30 °C |
<70% to 40 °C | ||
<40% to 50 °C | ||
Altitude | Operating: | 3,000 m (9,800 ft) max |
Non-operating: | 12,200 m (40,000 ft) max | |
Safety | EN/IEC 61010-1:2010 3rd Edition, UL 61010-1:2012, CAN/CSA 22.2 No. 61010-1-12 | |
Analog low isolation | 20 V | |
Line power | 120 V~: | 100 V to 120 V |
240 V~: | 220 V to 240 V | |
Line frequency | 47 Hz to 63 Hz | |
Line voltage variation | ± 10 % about setting | |
Power consumption | 15 VA maximum | |
Dimensions | Height: | 14.6 cm (5.75 in) |
Width: | 44.5 cm (17.5 in) | |
Depth: | 29.8 cm (11.75 in) | |
Weight (without options) | 4.24 kg (9.35 lb) |