01
Corporate Headquarters
2900 Saturn St #B
Brea, CA 92821, USA
Salt Lake City Office
1364 West State Rd. Suite 101
Pleasant Grove, UT 84062, USA
Phone: 714-998-6899 Fax: 714-998-6999 Email: sales@additel.com
Pressure / Process Calibration Equipment
Rev # 20191106
OVERVIEW
Gauge pressure Differential pressure
At rst glance, the 672 series precision pressure calibrators look like an ordinary pressure gauge. But this series is
much more than ordinary, and denitely more than just a pressure gauge—it’s a pressure calibrator! With advanced
microprocessor technology and state-of-the-art silicon pressure sensors, the 672 series precision pressure calibrators
provide a pressure calibration solution for gauges, transmitters, and switches over a wide pressure range. The 672
is the size of a pressure gauge but with the functionality of a calibrator: It measures pressure precisely with a built-
in pressure sensor, as well as reads the current or mV produced by a transducer. It can even supply an excitation
voltage to power sensors or transmitters during calibration. In order to reach 0.02%FS accuracy up to 10,000 psi
(700 bar) and 0.1%FS accuracy up to 60,000 psi (4,200 bar), every silicon pressure sensor has been specially aged,
tested, and screened before assembly. The 672 series precision pressure calibrators are unmatched in performance
and reliability.
FEATURES
Digital Pressure Calibrators
Additel 672
Pressure ranges to 60,000 psi (4,200 bar)
HART Communication capability
Measure mA or V, and with 24V loop power
Easy-to-use, inexpensive pressure calibrator with
uncertainty better than 0.02%FS
New Ranges to 60,000 psi (4,200 bar)
Pressure ranges to 60,000 psi (4,200 bar)
Measure mA with 0.01% RD + 1.5 μA accuracy
Measure V with 0.01% RD + 1.5 mV accuracy
Power transmitters during test using 24V loop supply
Pressure switch test
HART Communication capability
Advanced temperature compensation
Dual readout
Min/Max/Hold to capture changing measurements
Data logging
Large, easy to read display with 6-digit resolution
Backlit display
Rechargeable battery or AC adapter
ISO17025 accredited calibration with data (Included)
Pressure / Process Calibration Equipment
02
Corporate Headquarters
2900 Saturn St #B
Brea, CA 92821, USA
Salt Lake City Office
1364 West State Rd. Suite 101
Pleasant Grove, UT 84062, USA
Phone: 714-998-6899 Fax: 714-998-6999 Email: sales@additel.com
Rev # 20191106
Accuracy
ADT672-02: 0.02% of full scale
ADT672-05: 0.05% of full scale
>20,000 (1,400 bar): 0.1% FS
Gauge Types
Gauge pressure, compound pressure, absolute pressure,
differential pressure
Display
Description: Dual-line 6 full digit FSTN LCD with LED
Backlight
Display rate: 3.5 readings per second (Default setting).
Numeral display height: 16.5mm (0.65")
Pressure Units
Pa, kPa, MPa, psi, bar, mbar, kgf/cm
2
, inH
2
O@4°C
mmH
2
O@4°C, inHg@0°C, mmHg@0°C
Environmental
Compensated Temperature: 14°F to 122°F (-10°C to
50°C)
Operating Temperature: 14°F to 122°F (-10°C to 50°C)
Storage Temperature: -4°F to 158°F (-20°C to 70°C)
Humidity: <95%
Pressure Port
≤15,000 psi: 1/4NPT male, 1/2NPT male, 1/4BSP
male, 1/2BSP male, M20×1.5 male
>15,000 psi: 1/4HP female or 1/4HP male
*1/4HP female: Autoclave F-250-C, 9/16" - 18 UNF-2B
*1/4HP male: Autoclave M-250-C, 9/16" - 18 UNF-2A
Differential Pressure: 0.236 inch (Ø6 mm) test hose
Other connections available per request
Over Pressure
Warning
120%
Electrical
Connection
0.156 inch (Ø4mm) sockets
Electrical
Measurement
Accuracy
Voltage DC: ±30.0000V, ± (0.01%RD + 1.5 mV)
Current DC: ±30.0000mA, ± (0.01%RD + 1.5 μA)
DC 24V: 24V±0.5V, MAX:50mA, Protect at: 120mA
Switch
[1]
: Status OPEN/CLOSED
Power
Battery: Rechargeable Li-ion polymer battery
Li-Battery working time: 40 hours
Recharge time: 4 hours
External power: 110V/220V power adapter (DC10V)
Enclosure
Case material: Aluminum alloy
Wetted parts: 316L SS
Dimension: Ø120mm X 46mm depth X 184mm height
Weight: 0.7kg
Protection Level: IP30
Data Logging
Storage capacity: 30 les, 40 records per le
Mode: manual and automatic
Hourly-record: record the data every hour
Interval-record: set by user
Compliance
CE Marked
Communication
RS232 (DB9/F, environmentally sealed)
Baud rate: 1200, 2400, 4800, 9600
Data length: 8 bits
Stop bit: 2 bits
Address: from 1 to 112
Warranty
1 year
Compound Pressure
P/N
Pressure Range
M e d i a Accuracy(%FS)
[1]
Burst
Pressure
(psi) (bar)
CP2 ±2 ±0.16 G 0.05 3×
CP5 ±5 ±0.35 G 0.02 (0.05) 3×
CP10 ±10 ±0.7 G 0.02 (0.05) 3×
CP15 ±15 ±1 G 0.02 (0.05) 3×
CP30 -15 to 30 -1 to 2 G 0.02 (0.05) 3×
CP100 -15 to 100 -1 to 7 G, L 0.02 (0.05) 3×
CP300 -15 to 300 -1 to 20 G, L 0.02 (0.05) 3×
[1] FS specication applies to the span of the range
Gauge Pressure
[1]
P/N
Pressure Range
Media
[2]
Accuracy(%FS)
Burst
Pressure
(psi) (bar)
V15 -15 -1.0 G 0.02 (0.05) 3×
GP2 2 0.16 G 0.05 3×
GP5 5 0.35 G, L 0.05 3×
GP10 10 0.7 G, L
[3]
0.02 (0.05) 3×
GP15 15 1.0 G, L
[3]
0.02 (0.05) 3×
GP30 30 2.0 G, L
[3]
0.02 (0.05) 3×
GP50 50 3.5 G, L 0.02 (0.05) 3×
GP100 100 7.0 G, L 0.02 (0.05) 3×
GP150 150 10 G, L 0.02 (0.05) 3×
GP300 300 20 G, L 0.02 (0.05) 3×
GP500 500 35 G, L 0.02 (0.05) 3×
GP600 600 40 G, L 0.02 (0.05) 3×
GP1K 1,000 70 G, L 0.02 (0.05) 3×
GP2K 2,000 140 G, L 0.02 (0.05) 3×
GP3K 3,000 200 G, L 0.02 (0.05) 3×
GP5K 5,000 350 G, L 0.02 (0.05) 3×
GP10K 10,000 700 G, L 0.02 (0.05) 3×
GP15K 15,000 1,000 G, L 0.05 (0.1) 2×
GP20K 20,000 1,400 G, L 0.05 (0.1) 1.5×
GP25K 25,000 1,600 G, L 0.1 1.5×
GP30K 30,000 2,000 G, L 0.1 1.5×
GP36K 36,000 2,500 G, L 0.1 1.5×
GP40K 40,000 2,800 G, L 0.1 1.35×
GP50K 50,000 3,500 G, L 0.1 1.2×
GP60K 60,000 4,200 G, L 0.1 1.1×
[1] Sealed gauge pressure for above 1,000 psi
[2] G=Gas, L=Liquid
[3] 0.02% FS for gas media only
SPECIFICATIONS PRESSURE RANGE
[1] 1V~12V if switch has detective voltage
03
Corporate Headquarters
2900 Saturn St #B
Brea, CA 92821, USA
Salt Lake City Office
1364 West State Rd. Suite 101
Pleasant Grove, UT 84062, USA
Phone: 714-998-6899 Fax: 714-998-6999 Email: sales@additel.com
Pressure / Process Calibration Equipment
Rev # 20191106
ORDERING INFORMATION
Model Number
Model
Accuracy:
02-0.02% of full scale
05-0.05% of full scale
10-0.1% of full scale
Range type:
PSI-range by psi
BAR-range by bar
H
2
O-range by inH
2
O
Pressure port type:
N-1/4NPT male
N2-1/2NPT male
B-1/4BSP male
B2-1/2BSP male
M-M20X1.5 male
AF-Autoclave F-250-C female
AM-Autoclave M-250-C male
Pressure range P/N:
See pressure range table
Optional Accessories
ADT672 GP300 PSI02 N
Model
number
Description
9702 Spare rechargeable Li-ion polymer battery for 672
9816
Spare 110V/220V external power adapter (DC 10V)
for ADT22X and ADT672 calibrator
9502
Additel/Log II real time data logging and graphical
software for 681 and 672
9530-BASIC
Additel/Acal Automated calibration software with
asset management, basic version
9530-NET
Additel/Acal Automated calibration software with
asset management, network version, Includes server
installation and 1 user license
9050 USB to RS232 (DB9/M) Adapter
9050-EXT RS 232 (DB9/M) extension cable, 9 feet
9900-672 Carrying Case for one 672 digital pressure gauge
9022
Spare 2 pieces test leads (1.5-meter) and 2 pieces
alligator clips
Absolute Pressure
P/N
Pressure Range
Media Accuracy(%FS)
Burst
Pressure
(psi) (bar)
A P 5 5 0.35 G 0.1 3×
AP10 10 0.7 G 0.1 3×
AP15 15 1.0 G 0.1 3×
AP30 30 2.0 G 0.1 3×
AP50 50 3.5 G 0.1 3×
AP100 100 7.0 G , L 0.05 (0.1) 3×
AP300 300 20 G , L 0.05 (0.1) 3×
AP500 500 35 G , L 0.05 (0.1) 3×
AP1K 1,000 70 G , L 0.05 (0.1) 3×
A P 3 K 3,000 200 G , L 0.05 (0.1) 3×
AP5K 5 , 0 0 0 350 G , L 0.05 (0.1) 3×
Accessories Included
110V/220V external power adapter (DC 10V)
2 pieces test leads (1.5-meter) and 2 pieces alligator clips
2 pieces 0.236 inch (Ø6 mm) test hose
(for differential pressure gauge only)
Additel/Land software
(free download at www.additel.com)
Manual
ISO 17025 accredited calibration certicate
Differential Pressure
P/N
Pressure Range
Media
Accuracy
(%FS)
[1]
Burst
Pressure
Static
Pressure
Range
(inH
2
O) (mbar)
DP1 ±1 ±2.5 G 0.05
[2]
100× ±10 psi
DP2 ±2 ± 5 . 0 G 0.05
[2]
100× ±10 psi
DP5 ±5 ±10 G 0.05
[2]
50× ±10 psi
DP10 ± 1 0 ±25 G 0.05
[2]
20× ±10 psi
DP20 ±20 ±50 G 0.05 20× ±10 psi
DP30 ±30 ±75 G 0.05 20× ±10 psi
DP50 ±50 ±160 G 0.05 3× ±10 psi
DP100 ±100 ±250 G 0.02 3× ±15 psi
DP150 ±150 ±350 G 0.02 3× 50 psi
DP300 ±300 ±700 G 0.02 3× 50 psi
[1] FS specication applies to the span of the range. Accuracy includes
one year stability.
[2] 0.05%FS accuracy (incl 6 months stability). One year accuracy is
0.05%FS calibration accuracy combined with 0.05%FS one year stability.
Pressure / Process Calibration Equipment
04
Corporate Headquarters
2900 Saturn St #B
Brea, CA 92821, USA
Salt Lake City Office
1364 West State Rd. Suite 101
Pleasant Grove, UT 84062, USA
Phone: 714-998-6899 Fax: 714-998-6999 Email: sales@additel.com
Rev # 20191106
Percentage of Reading Accuracy
Application Note
Understanding Accuracy Specifications for Digital Pressure Sensors – Percentage of Full Scale Versus
Percentage of Reading
Specications for digital pressure gauges can sometimes seem confusing or overwhelming, especially, if you are
unfamiliar with the terminology. Some pressure sensors will specify accuracy as a percent of full scale (FS) while
others provide the specication as a percent of reading. So why are there different ways of specifying the accuracy of
pressure sensors and is percent of reading more accurate than percent of full scale or vise versa? This brief technical
note will discuss the two differences and answer these questions.
Accuracy as a percentage of reading is accomplished by multiplying
the accuracy percentage by the pressure reading. Thus, the lower
the pressure measurement, the better the accuracy. Instruments that
have a percent reading specification are accompanied with a floor
specication. The oor specication takes into account uncertainties
such as resolution and measurement noise which may be negligible
at higher pressures but are of much more significance at lower
pressures.
For example, an accuracy specification may read 0.1% of reading
for 20 to 100% of range and 0.02% of full scale below 20% of the
range. The 0.02% of full scale specication is considered the oor
specication. To understand the accuracy of the sensor, the user is
then required to know where the oor spec is applicable and the full
scale of the sensor.
This method of specication is often used because it aligns well with
the typical performance of pressure gauges. Typically, the closer you
measure to barometric pressure the better the performance of the
gauge. Figures 1 and the graph below show an example specication
for a 100 psi gauge and its accuracy in psi.
Figure 1 - Percent reading accuracy example
Full scale: 0 to 100 psi
Accuracy: 20 to 100% FS: 0.1% of reading
0 to 20% FS: 0.02% of FS
psi
Accuracy
(psi)
0 0.02
0.02%FS10 0.02
20 0.02
0.1% of
Reading
30 0.03
40 0.04
50 0.05
60 0.06
70 0.07
80 0.08
90 0.09
100 0.10
05
Corporate Headquarters
2900 Saturn St #B
Brea, CA 92821, USA
Salt Lake City Office
1364 West State Rd. Suite 101
Pleasant Grove, UT 84062, USA
Phone: 714-998-6899 Fax: 714-998-6999 Email: sales@additel.com
Pressure / Process Calibration Equipment
Rev # 20191106
Percentage of Full Scale Accuracy
A Comparison of Percent of Full Scale and Percent of Reading Accuracies
Accuracy as a percentage of full scale is calculated by multiplying the
accuracy percentage by the full scale pressure of the gauge. This is
obviously a more simple method of specication and is most commonly
used in industry because it is easy to calculate and interpret. Denoting the
accuracy as percent full scale is a more conservative way of specifying
the pressure sensor because typically the sensor doesn't perform the
same over its full range. It usually will perform more accurately as you
approach barometric pressure. This type of specication is most common
for industrial gauges which make it easier to compare one gauge versus
another. Figure 2 is an example specication for a 100 psi gauge and its
accuracy in psi.
psi
Accuracy
(psi)
0 0.05
0.05%FS
10 0.05
20 0.05
30 0.05
40 0.05
50 0.05
60 0.05
70 0.05
80 0.05
90 0.05
100 0.05
psi
Accuracy
(psi)
0.1% of
Reading
0.05% of FS 0.02% of FS
0 0.02 0.05 0.02
10 0.02 0.05 0.02
20 0.02 0.05 0.02
30 0.03 0.05 0.02
40 0.04 0.05 0.02
50 0.05 0.05 0.02
60 0.06 0.05 0.02
70 0.07 0.05 0.02
80 0.08 0.05 0.02
90 0.09 0.05 0.02
100 0.10 0.05 0.02
So you may ask, "Which is more accurate?" The answer is that it depends
on the pressure being measured. In the two examples given, the gauge
specied at 0.1% of reading is more accurate as you measure lower
pressures in its range. However, as you move above 50% of the range,
the gauge specied at 0.05% of full scale becomes more accurate than
the 0.1% of reading gauge. This can be seen clearly in the chart (left)
and graph (below) where the two gauges are compared in terms of psi
accuracy. To properly compare these, two gauges you should convert the
accuracy to pressure units, such as psi or bar. Then they can be properly
matched one against another in like units of measure.
In conclusion, one method of specication is not better than another, it
is just different. Given this difference it becomes important to know how
to interpret the different specications types and be able to compare one
versus another.
