Fluke 721EX Specifications
Fluke 721 Precision
Pressure Calibrator
Technical Data
Pressure calibration and temperature
measurement for custody transfer applications
The Fluke 721 Precision Pressure Calibrator with dual
isolated pressure sensors is the ideal tool for gas custody
transfer applications allowing you to take simultaneous static
and differential pressure measurements with a single tool.
Product highlights
The 721 can be configured by
selecting either a 16 PSI
(1.1 bar) or 36 psi (2.48 bar) low
pressure sensor then add any of
7 high pressure ranges including 100, 300, 500, 1000, 1500,
3000 or 5000 psi (6.9, 20, 24.5,
69, 103.4, 200, 345 bar).
Ideal for gas flow calibration
•
(custody transfer) applications
Two isolated, stainless steel,
•
pressure sensors with
0.025 % accuracy
Pt100 RTD input for tempera-
•
ture measurement, (probe
optional)
Measures 4 to 20 mA signals
•
Internal 24 V loop power
•
supply can power a transmitter under test
Measure up to 30 V dc, check
•
24 V loop power supplies
Extend pressure measure-
•
ment range with connection
to external 700 series pressure modules (29 ranges)
Large backlit graphic display
•
can display up to three inputs
simultaneously
Store five instrument setups
•
for recall and use
Specifications 1-year
Low pressure sensor High pressure sensor
Model Description Range sensor 1 Resolution
Fluke-721-1601 Dual Sensor Pressure Cali-
brator, 16 PSIG, 100 PSIG
Fluke-721-1603 Dual Sensor Pressure Cali-
brator, 16 PSIG, 300 PSIG
Fluke-721-1605 Dual Sensor Pressure Cali-
brator, 16 PSIG, 500 PSIG
Fluke-721-1610 Dual Sensor Pressure Cali-
brator, 16 PSIG, 1000 PSIG
Fluke-721-1615 Dual Sensor Pressure Cali-
brator, 16 PSIG, 1500 PSIG
Fluke-721-1630 Dual Sensor Pressure Cali-
brator, 16 PSIG, 3000 PSIG
Fluke-721-1650 Dual Sensor Pressure Cali-
brator, 16 PSIG, 5000 PSIG
Fluke-721-3601 Dual Sensor Pressure Cali-
brator, 36 PSIG, 100 PSIG
Fluke-721-3603 Dual Sensor Pressure Cali-
brator, 36 PSIG, 300 PSIG
Fluke-721-3605 Dual Sensor Pressure Cali-
brator, 36 PSIG, 500 PSIG
Fluke-721-3610 Dual Sensor Pressure Cali-
brator, 36 PSIG, 1000 PSIG
Fluke-721-3615 Dual Sensor Pressure Cali-
brator, 36 PSIG, 1500 PSIG
Fluke-721-3630 Dual Sensor Pressure Cali-
brator, 36 PSIG, 3000 PSIG
Fluke-721-3650 Dual Sensor Pressure Cali-
brator, 36 PSIG, 5000 PSIG
-14 psi to +16 psi
-0.97 bar to 1.1 bar
-14 psi to +36 psi
-0.97 bar to 2.48 bar
sensor 1
0.001 psi,
0.0001 bar
Accuracy
sensor 1
% of
0.025
full scale
Range sensor 2 Resolution
-12 psi to +100 psi
-0.83 bar to 6.9 bar
-12 psi to +300 psi
-0.83 bar to 20 bar
-12 psi to +500 psi
-0.83 bar to 34.5 bar
0 psi to +1000 psi
0.00 bar to 69 bar
0 psi to +1500 psi
0.00 bar to 103.4 bar
0 psi to +3000 psi
0.00 bar to 200 bar
0 psi to +5000 psi
0.00 bar to 345 bar
-12 to +100 psi
-0.83 bar to 6.9 bar
-12 psi to +300 psi
-0.83 bar to 20 bar
-12 psi to +500 psi
-0.83 bar to 34.5 bar
0 psi to +1000 psi
0.00 bar to 69 bar
0 psi to +1500 psi
0.00 bar to 103.4 bar
0 psi to +3000 psi
0.00 bar to 200 bar
0 psi to +5000 psi
0.00 bar to 345 bar
sensor 2
0.01 psi
0.0001 bar
0.01 psi
0.001 bar
0.01 psi
0.001 bar
0.1 psi
0.001 bar
0.1 psi
0.001 bar
0.1 psi
0.01 bar
0.1 psi
0.01 bar
.01 psi
0.0001 bar
0.01 psi
0.001 bar
0.01 psi
0.001 bar
0.1 psi
0.001 bar
0.1 psi
0.01 bar
0.1 psi
0.01 bar
0.1 psi
0.01 bar
Accuracy
sensor 2
0.025 % of
full scale
% of
0.035
full scale
0.025
% of
full scale
% of
0.035
full scale
General specifications
Instrument setup recall Last used on power-up
Environmental Operating temperature -10 °C
to +50 °C
Storage temperature (without
batteries) -20 °C to +60 °C
Altitude 2,000 meters
Ingress protection IP-40
Power requirements 6.0 v dc
Battery life >35 hours, typical usage
Batteries required (4) Standard AA cells
Dimentions (HxWxD) 7.9” X 4.3” X 2.3” (20 cm X
11 cm X 5.8 cm)
Weight 03539 kg (1 lb 3 oz)
Connectors/ports pressure Two, 1/8 in NPT, 700P Series
Pressure Module; RTD Probe
2 Fluke Corporation Fluke 721 Precision Pressure Calibrator
Electrical and temperature measurement 1-year
Function Range Resolution Accuracy
mA measure 0 to 24 mA 0.001 mA ±0.015% of rdg
±0.002mA
VDC measure 0 to 30 VDC 0.001V ±0.015% of rdg
±0.002V
*Temperature
measure (RTD/
Ohms)
Loop power supply 24V N/A 24 mA @ 24V
*Temperature measurement requires optional Fluke-720RTD Pt-100 RTD probe
available as an accessory
Temperature effect
No effect on accuracy on all functions from 15 °C to 35 °C
Add ± 0.002
-40 °C to 150 °C
(-40 °F to 302 °F)
% F.S./°C for temps outside of 15 °C to 35 °C
0.01 °C, 0.01 °F ±0.015% of rdg
±0.02 ohms;
±0.1°C (±0.2°F)
±0.25 degC (±0.45
degF) combined
uncertainty when
using 720 RTD
probe accessory
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