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1
107 Kitty Hawk Lane, P.O. Box 2145, Elizabeth City, NC 27906-2145
Model: CAT3-AC-MIL
800-628-4584 252-331-1997 FAX 252-331-2886
www.hofferflow.com
E-mail: info@hofferflow.com
AC Powered Microprocessor
Controlled Transmitter
USER'S MANUAL
HP-325
March 2025
107 Kitty Hawk Lane
P.O. Box 2145
Elizabeth City, NC 27909
●
●
1-800-628-4584
(252) 331-1997
Fax (252) 331-2886
●
●
www.hofferflow.com
email: info@hofferflow.com
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Related Manuals for Hoffer Flow Controls CAT3-AC-MIL
Summary of Contents for Hoffer Flow Controls CAT3-AC-MIL
- Page 1 Safety 107 Kitty Hawk Lane, P.O. Box 2145, Elizabeth City, NC 27906-2145 Model: CAT3-AC-MIL 800-628-4584 252-331-1997 FAX 252-331-2886 www.hofferflow.com E-mail: info@hofferflow.com AC Powered Microprocessor Controlled Transmitter USER’S MANUAL HP-325 March 2025 107 Kitty Hawk Lane P.O. Box 2145 Elizabeth City, NC 27909 ●...
- Page 3 NOTICE HOFFER FLOW CONTROLS, INC. makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. This manual has been provided as an aid in installing, connecting, calibrating, operating, and servicing this unit.
- Page 4 LIMITED WARRANTY HOFFER FLOW CONTROLS, INC. ("HFC") warrants HFC's products ("goods") described in the specifications incorporated in this manual to be free from defects in material and workmanship under normal use and service, but only if such goods have been properly selected for the service intended, properly installed and properly operated and maintained.
- Page 5 The manual contains the information required to install, operate, maintain, and repair a CAT3-AC-MIL Flow Rate Signal Converter. The CAT3-AC-MIL unit is intended to provide ship personnel with the ability to monitor the flow of fuel and other liquids. HP-325...
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- Page 7 CONTENTS FORWARD ------------------------------------------------------------------------ i CONTENTS ----------------------------------------------------------------------iii Safety ------------------------------------------------------------------------ 1 Compliance ---------------------------------------------------------------- 3 Specifications -------------------------------------------------------------- 5 Model Number Designation ---------------------------------------- 6 Operation ------------------------------------------------------------------ 7 Preamplifier ----------------------------------------------------------- 7 Microcontroller ------------------------------------------------------- 7 Analog Output -------------------------------------------------------- 8 Scaled Pulse Output ------------------------------------------------- 9 Communications Interface ------------------------------------------ 9 Installation ---------------------------------------------------------------101 Power Supply -------------------------------------------------------- 11 Flowmeter Input ----------------------------------------------------- 11...
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- Page 9 Safety SAFETY The CAT3-AC-MIL Fuel Metering unit is designed to satisfy the safety requirements for shipboard use. The safety precautions and warnings described here are to be observed at all times. Additional precautionary messages appear throughout this manual. WARNING: Risk of Electric Shock Remove AC power cable before opening enclosure or servicing.
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- Page 11 Compliance COMPLIANCE This instrument is designed to conform to the EMC-Directive of the Council of European Communities 89/336/EEC. This instrument has been certified to meet MIL-S-901D for shock and vibration and MIL-STD-461F for EMI compliance. HP-325...
- Page 12 Compliance This page intentionally left blank. HP-325...
- Page 13 Specifications SPECIFICATIONS Input Signal Type: Magnetic pick up Input frequency range: 0.2 Hz to 4 KHz Signal level: 10 mV rms to 30 Vdc Power supply: 120Vac, 50mA max Analog Output: 4-20mA, 24mA overflow condition Analog Output Response Time: 1/8 sec.* Load resistance: Max 650 Ohms at 24 Vdc Accuracy:...
- Page 14 Operation Model Number Designation MODEL CAT3-MIL-( PULSE INPUT LINEARIZED PULSE OUTPUT LINEARIZED ANALOG OUTPUT POWER SUPPLY ALARM OUTPUT ENCLOSURE STYLE SPECIAL FEATURES PULSE INPUT MODEL CAT3-MIL-( )-( )-( ( A ) OPTION MAG COIL, PULSE, DRY CONTACT LINEARIZED PULSE OUTPUT MODEL CAT3-MIL-( )-( )-( )-( )-( ( B )
- Page 15 Operation OPERATION The CAT3-AC-MIL is an AC powered microprocessor-based transmitter, which provides pulse and analog outputs. The flowmeter input circuitry will accept a magnetic type pickup, pulse and contact closure. Optional 20-point linearization is available to correct for flowmeter non-linearity, improving overall system accuracy.
- Page 16 Flowrate is in gal/min. Frequency is in Hertz. Analog Output CAT3-AC-MIL provides an analog output current that is proportional to the flow rate. The analog output is scaled as follows: 4 mA = 0 GPM 20mA = Max Flow Rate in GPM If the calculated flowrate is greater than the 20mA setting, the current is set to 24mA to indicate an “Over-range”...
- Page 17 Operation Scaled Pulse Output CAT3-AC-MIL Pulse Output can be configured for turbine raw frequency or for unit of measure scaled for the least significant digit of the internal total. A scaling factor of 1, 10 or 100 is available to reduce or increase the resolution of the pulse output.
- Page 18 Operation This page intentionally left blank. HP-325...
- Page 19 Installation INSTALLATION Power Supply AC Power (100-240 VAC) AC power for CAT3 requires an optional circuit board, PCA182. The Alarm option (PCA184) is not available when the AC Power option is equipped. SIG+ SIG- ANLG PULSE+ PULSE- PCA180 PL UG AC MALE NEUTRAL Flowmeter Input The Preamp circuitry for conditioning the flow signal is located on PCA180.
- Page 20 Select 1, 10, 100. Number of output pulses can be divided by 1, 10, 100. The divider is used when output frequency exceeds the CAT3-AC-MIL max allowable number of 100Hz. Note: Number of output pulses can be also reduced by changing Total Decimal Places.
- Page 21 Installation Pulse Frequency: Sets Frequency/Pulse Width for output pulse. Select 1, 2, 4, 8, 100 cps. (cps - cycles per second). Note: Output pulse duty cycle is about 50%. Changing pulse frequency sets pulse width per below table. Pulse Frequency Hz Pulse Width or cps less than...
- Page 22 Operation Analog Output CAT3-AC-MIL provides an Analog Output option that will output an analog current or voltage that is proportional to the flow rate. Analog Output – AC Power SIG+ SIG- ANLG PULSE+ PULSE- LOAD PLUG AC MALE NEUTRAL PCA183 4–20 mA Output...
- Page 23 When installing CAT3-AC-MIL, it is a good practice to use shielded cables for all input and output signals. The shield should be connected to the earth ground lug on the CAT3-AC-MIL. The shield on the opposite end of the cable should be left open.
- Page 24 Operation Flowmeter Installation and Initial Startup The performance of the turbine flowmeter is affected by the fluid swirl and non-uniform velocity profiles. It is advisable not to locate the meter run immediately downstream of pumps, partially opened valves, bends or other similar piping configurations. In addition, the area surrounding the flowmeter should be free of sources of electrical noise such as motors, solenoids, transformers and power lines which may be coupled to the pickoff device.
- Page 25 Preventative Maintenance PREVENTATIVE MAINTENANCE Introduction Hoffer Flow Controls Flow Measurement Systems are constructed to give a long service life in the targeted measuring field and service environment. However, problems do occur from time to time and the following points should be considered for preventive maintenance and repairs.
- Page 26 Preventative Maintenance This page intentionally left blank. HP-325...
- Page 27 Troubleshooting 7. TROUBLESHOOTING Introduction The troubleshooting techniques in this chapter are designed to isolate and locate the area of failure and to present the procedures for the replacement of subassemblies to make the system operational. Troubleshooting Procedures The required test equipment for troubleshooting is as follows: Digital Multimeter: Fluke Model 8060A or equal.
- Page 28 Troubleshooting ohms between pin A and pin B. A short or an open indicates a defective pickup coil and the pickup coil must be replaced. With an established flowrate, configure the digital multimeter to measure AC volts, using the two volt scale.
- Page 29 Troubleshooting Replacing the Electronics If the electronics are determined to be faulty, follow the steps below to remove and replace the unit. Turn off the power supply. Open the Style 5 enclosure and unplug the 10-pin and 2-pin terminals from the headers. Remove the top plate screw from the blue enclosure to disconnect ground wire.
- Page 30 Troubleshooting This page intentionally left blank. HP-325...
- Page 31 Appendix A – Default Configuration – Default Configuration Appendix A Factory default configuration: FIELD Value TAG NUMBER 10000000 LINEARIZATION Average K FACTOR DECIMAL POINTS AVERAGE K FACTOR 1.00 NUMBER OF LINEARIZATION POINTS FREQUENCY 1 4999.981 FREQUENCY 2 4999.982 FREQUENCY 3 4999.983 FREQUENCY 4 4999.984...
- Page 32 Appendix A – Default Configuration FIELD Value K FACTOR 16 1.00 K FACTOR 17 1.00 K FACTOR 18 1.00 K FACTOR 19 1.00 K FACTOR 20 1.00 CORRECTION FACTOR 1.000 TOTAL UNITS RATE UNITS MAX SAMPLE TIME 4 MA SETTING 00000.000 20 MA SETTING 99.999...
- Page 33 External power must be supplied to the CAT3-AC-MIL in order to communicate. Communications with the CAT3-AC-MIL also requires the use of the HOFFER HIT2A-301 Communications Cable and the Hoffer Windows Device Configuration Software. The computer...
- Page 34 Appendix C – Drawings – Drawings Appendix C HP-325...
- Page 35 Appendix C – Drawings HP-325...
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