AMETEK APMi Series Crystal APMi Intrinsically Safe Pressure Module Instruction Manual
- June 4, 2024
- AMETEK
Table of Contents
AMETEK APMi Series Crystal APMi Intrinsically Safe Pressure Module
Overview
INTRODUCTION
The Crystal APMi series of intrinsically safe pressure modules allow you to
add additional pressure measurement capability to your HPC50 pressure
calibrator. The APMi uses the same reliable, high accuracy, digital
temperature compensated technology found in Crystal products, housed in a
rugged enclosure with a selectable-length cable to connect to your HPC50
calibrator. Two APMi modules can be connected to a single HPC50 calibrator.
Note: Currently, the HPC50 is the only Crystal calibrator supported by
the APMi pressure module.
Note: This manual includes information on the APMi modules only. For
details on the operation of the HPC50 Series, please refer to the User Manual.
What’s Included
Each unit includes an APMi pressure module, an interface cable of your choice
(1, 3, or 10 meter), a fitting of your choice (1/4 NPT Male, 1/4 BSP Male, or
M20 x 1.5 Male), an ISO 17025 Accredited Calibration Certificate (NIST
traceable), and AMETEK product CD. Crystal Engineering calibration facilities
are A2LA accredited, (#2601.01) which is internationally recognized by ILAC
Operation
ADVANCED PRESSURE MODULE (APMi) INSTRUCTIONS
Pressure Connection
Crystal CPFSystem: Medium Pressure Female (MPF) (1/4” medium pressure tube
system with 7/16-20 threads). See our CPF Brochure for further information.
U.S. Patent No. 8,794,677 CPF o-ring size and material: AS568A-012, Viton 80
durometer (P/N 3981). For most applications CPF Fittings can be hand tightened
for use up to 10 000 psi/ 700 bar/ 70 MPa (no tools required). Wrench
tightening is recommended (to achieve a metal-to-metal cone seal) for
applications where chemical compatibility of the process fluid and the o-ring
are a concern, or for pressures above 10 000 psi/ 700 bar/ 70 MPa. We
recommend a tightening torque of 120 in-lbs ±20 in-lbs. Please note this is
only a fraction of the typical torque required to seal a 1/4” NPT fitting. If
a torque wrench isn’t practical to use, the fittings can be assembled as
follows: Hand tighten fitting fully until the cone has bottomed out. Tighten
an additional 20º using a wrench. Apply a small amount of media-compatible
lubricant to the gland threads and male cone to increase fitting life, reduce
the likelihood of galling, and promote sealing.
Measuring Vacuum
All ranges of the APMi can be used to measure moderate vacuum. Ranges 300 psi/
30 bar/ 3 MPa and below are calibrated for vacuum use. When measuring pressure
less than ambient barometric conditions, a minus sign (-) will appear.
CAUTION: The APMi is not recommended for continuous use at high vacuum.
Overpressure Conditions
The APMi will read pressure up to approximately 110% of the rated pressure
range. The HPC50 Calibrator will display an overpressure warning. For example,
above 110% of the range, “OL” will display on the HPC50, indicating an
Overload Alarm. The zero function does not affect when the “OL” is displayed
to indicate overpressure. So depending on the zero value, it is possible that
the display will indicate “OL” without the maximum pressure being displayed.
For instance, if a 100 psi APMi is zeroed when 30 psi is being applied, it
will indicate that the overpressure condition has been reached at 80 psi.
(i.e., 110% x 100 psi – 30 psi = 80 psi). Overpressure can affect accuracy,
but the effect is only temporary unless the sensor has been damaged. See
Specifications for maximum allowable overpressure ratings.
Specifications
ACCURACY
psi (Gauge Pressure)
- 18 to 28° C
- 0 to 30% of Range: . . . . . . . . . . . . . . .±(0.01% of Full Scale)
- 30 to 110% of Range: . . . . . . . . . . . .±(0.035% of Reading)
- *Vacuum :* . . . . . . . . . . . . . . . . . . . . . . .±(0.05% of Full Scale * )
- 20 to 50° C
- 0 to 30% of Range: . . . . . . . . . . . . . . .±(0.015% of Full Scale)
- 30 to 110% of Range: . . . . . . . . . . . .±(0.050% of Reading)
- *Vacuum :* . . . . . . . . . . . . . . . . . . . . . . .±(0.05% of Full Scale * )
psiA (Absolute Pressure with BARO Option)
All absolute accuracies are equivalent to the gauge pressure accuracies, except as noted below.
- 15 psi/1 bar/100 kPa Range: . . . . .Gauge Accuracy +0.005 psiA
- 30 psi/3 bar/300 kPa Range: . . . . .Gauge Accuracy +0.005 psiA
- 100 psi/10 bar/1MPa Range: . . . . .Gauge Accuracy +0.002 psiA
Includes all effects of linearity, hysteresis, repeatability, temperature, and stability for one year. Exposure to environmental extremes of temperature, shock, and/or vibration may warrant a more frequent recertiffcation period. APMi modules must be exercised and re-zeroed whenever exposed to significant changes in environmental conditions to achieve these specifications. To exercise a module, cycle the module between zero (ambient barometric pressure) and the pressure of interest. A properly exercised module will return to a zero reading (or return to the same ambient barometric reading). All models indicate vacuum, but vacuum specification applies only where specified. Not recommended for continuous use at high vacuum. Refer to XP2i-DP data sheet for gauges that are intended for continuous high vacuum use. The BARO option for the HPC50 Series allows you to toggle between gauge and absolute pressure using the same APMi module.
SENSOR
- Wetted Materials. . . . . . . . . . . . .(wrench tight) 316 stainless steel (finger tight) 316 stainless steel and Viton® with internal o-ring (15 psi/1 bar/100 kPa) 316 stainless steel and Viton®
- Diaphragm Seal Fluid . . . . . . . .Silicone Oil
- Connection . . . . . . . . . . . . . . . . . .Crystal CPF Female
All welded, with a permanently filled diaphragm seal. Metal to metal cone seal; O-ring can be removed if necessary. 1/4″ male NPT adapter is included unless BSP or M20. 1/4″ medium pressure tube system is compatible with HIP LM4 and LF4 Series, Autoclave Engr SF250CX Male and Female Series.
OUTPUT
- Pressure Resolution . . . . . . . . . .up to 6 digits
- Display Update . . . . . . . . . . . . . .up to 10 per second
Pressure resolution and display update are the maximum values available. The resolution of your Crystal device may be different.
ENCLOSURE
- Dimensions . . . . . . . . . . . . . . . . . .2.9 x 1.1 in (74.0 x 27.0 mm)
- Weight . . . . . . . . . . . . . . . . . . . . . .0.39 lbs (176.0 g)
ACCURACIES, RANGES, AND RESOLUTIONS
Ordering Information
SAMPLE PART NUMBERS
- APMi30PSI ……………. . 30 psi APMi with a 1/4″ NPT male pressure fitting and 1 meter cable.
- APMi700BAR-BSP-3M . . . 700 bar APMi with a 1/4″ BSP male pressure fitting and 3 meter cable.
- APMi10MPA-M20-10M. . . 10 MPa APMi with an M20x1.5 male pressure fitting and 10 meter cable.
Pressure Conversions
- 1 PSI =
- 27.6806 inches of water column (water at 4°C [39.2°F])
- 703.087 millimeters of water column (water at 4°C [39.2°F])
- 70.3087 centimeters of water column (water at 4°C [39.2°F])
- 2.03602 inches of mercury (mercury at 0°C [32°F])
- 51.7149 millimeters of mercury (mercury at 0°C [32°F])
- 6.8948 kilopascals
- 0.070307 kilograms per square centimeter
- 0.068948 bar
- 68.948 millibar
- 0.0068948 megapascals
HAZARDOUS LOCATIONS
The HPC50 Series calibrator with an APMi module has a rating of:
- II 1G Ex ia IIC T4/T3 Ga
- FTZU 18 ATEX 0043X
The APMi can be connected and disconnected in Hazardous Areas.
Exia Intrinsically Safe and Non-Incendive for Hazardous Locations: Class I, Division 1, Groups A, B, C, and D; Temperature Code T4/T3. Class I, Zone 0, AEx ia IIC T4/T3 Ga. Sécurité intrinsèque et non incendiaire pour dangereux Lieux: Classe I, Division 1, Groupes A, B, C, and D; Code de température T4/T3. Classe I, Zone 0, AEx ia IIC T4/T3 Ga.
Entity Parameters
- Ui = 5.0 V
- li = 740 mA
- Pi = 880 mW
- Ci = 9.2 µF
- Li = 12 µH
Certifications
We declare that the APMi is in accordance with the ATEX Directive,
Electromagnetic Compatibility Directive, the Pressure Equipment Directive, and
RoHS Directive per our declaration(s).
Support
CALIBRATION
If adjustment is required, we recommend returning the APMi to the factory.
Factory service offers benefits you won’t find anywhere else. Factory
calibration tests your APMi utilizing NIST traceable standards, resulting in
calibration certificates that provide performance data and uncertainties. Our
calibration
facilities are A2LA accredited (cert #2601.01) to ISO 17025:2005 & ANSI/NCSL
Z540-1-1994. A2LA is internationally recognized as an accreditation body by
the International Laboratory Accreditation Cooperation, ILAC. Furthermore,
upgrades may be available to add or enhance operating features. We designed
the product to last, and we support it so that you can get the most from your
investment. Under normal operating conditions, we recommend the APMi be
calibrated on an annual basis. Your quality system may require more or less
frequent calibration, or your experience with the gauge, or operating
environment may suggest longer or shorter intervals. There are no internal
potentiometers. The APMi has a “span factor” (userspan), set to approximately
1 (as shipped from the factory). As components age this may need to be changed
to a value slightly higher or lower, to slightly increase or decrease all
readings. This adjustment can be made with a computer through our free
CrystalControl software. “Zero” the APMi, then record the displayed pressure
for two or more pressure points. Determine if the APMi would benefit from an
overall increase or decrease of the indicated pressures. Adjust the userspan
value accordingly and validate the results.
ACCESSORIES AND REPLACEMENT PARTS
- MPM-1/4MPT CPF Male to 1/4″ Male NPT Fitting Included as standard
- MPM-1/4BSPM CPF Male to 1/4″ Male BSP Fitting Included with -BSP
- MPM-M20x1.5M CPF Male to M20 Male Adapter Included with -M20
WARRANTY
Crystal Engineering Corporation warrants the APMi (Advanced Pressure Module)
to be free from defects in material and workmanship under normal use and
service for one (1) year from date of purchase to the original purchaser. It
does not apply to batteries or when the product has been misused, altered or
damaged by accident or abnormal conditions of operation. Crystal Engineering
will, at our option, repair or replace the defective device free of charge and
the device will be returned, transportation prepaid. However, if we determine
the failure was caused by misuse, alteration, accident or abnormal condition
of operation, you will be billed for the repair.
CRYSTAL ENGINEERING CORPORATION MAKES NO WARRANTY OTHER THAN THE LIMITED
WARRANTY STATED ABOVE. ALL WARRANTIES, INCLUDING IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE, ARE LIMITED TO A PERIOD
OF ONE (1) YEAR FROM THE DATE OF PURCHASE. CRYSTAL ENGINEERING SHALL NOT BE
LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER IN
CONTRACT, TORT OR OTHERWISE.
Note: (USA only) Some states do not allow limitations of implied
warranties or the exclusion of incidental or consequential damages, so the
above limitations or exclusions may not apply to you. This warranty gives you
specific legal rights and you may have other rights which vary from state to
state.
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