BH112JD Series JETCAL® Engine Analyzer
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Portable engine test sets & trimmers Cockpit Temperature Indicator Test The tester provides a simulated thermocouple output to check the calibration of high impedance (null balance) or low impedance (current drawing) temperature indicators. malfunction is indicated. The JETCAL® Analyzer can then be used as a troubleshooting device to check cockpit temperature indicator calibration, thermocouple harness circuit and insulation resistance. Thermocouple Harness Tests The accuracy of current drawing engine temperature indicators is dependent upon the resistance of the thermocouple harness. The BH112JD can be used to accurately measure the resistance of any harness to 40 ohms, as well as insulation resistance to 200,000 ohms. Portable engine test sets & trimmers In addition to checking the engine thermocouple system, the JETCAL® Analyzer can be used to test continuous-wire fire detection systems and thermal switches. By using a special air leak detector, maintenance personnel can locate air leaks at engine parting surfaces, bleed air ports, and anti-ice and air conditioning ducts. Probe Control Photo Courtesy of Department of Defense The Probe Control Section contains the power supply and controls required for the operation of the heater probes, including the connector and switch required to perform spread tests. JETCAL® Engine Analyzer 1 To test the engine thermocouple harness, a heater probe is placed over each engine thermocouple. The BH112JD JETCAL® Analyzer controls the power applied to the probes to maintain them at a preselected test temperature. Since the probe is precisely fitted to the engine thermocouple, the probe and thermocouple are maintained at the same temperature. A thermocouple embedded in the probe accurately measures the probe temperature. If the aircraft thermocouple temperature displayed on the JETCAL® Analyzer or cockpit indicator is outside the acceptable probe temperature specified in the manual, a The BH112JD JETCAL® Engine Analyzer provides a superior combination of capabilities in a ruggedized, portable test set. The BH112JD JETCAL® Engine Analyzer is designed to: • Functionally check and troubleshoot the temperature measuring system in aircraft turbine engines without running the engines, saving fuel and engine life. • Accurately monitor, record and print critical engine parameters during engine trim. Probe Control Module A Interconnect - Provides connection to Trimmer Section. POWER INLET CABLE INTERCONNECT CABLE B Power Input - 115 or 230 VAC, 50 to 400 Hz, Single Phase Main Power Input SPREAD ADAPTER CABLE INTERCONNECT INTERCONNECT POWER INPUT HEATER CABLE HEATER CABLE FUSE - 20 BUSS FUSE - 20 PROBE POWER C Spread Cable - Connection for Spread Cable. Input Parameter Flexibility Basic engine test parameters-temperature, speed and pressure-can all be scaled to the exact requirements of the engine being tested. • Engine speed can be scaled in %RPM, direct RPM or in frequency (Hz). • Externally measured pressure can be displayed in inHg, psi, ft-lb or %Torque. • Internally measured pressure can be displayed in inHg or psi. • Engine Select Switch allows the operator to select the specific calibration and scale factors appropriate for the engine under test. • Scale factors can be easily entered into memory for up to ten different engine types. • nstructional prompts are provided on the tester I display throughout the scaling procedure. ENGINE HARNESS STAINNER INPUTS HEATER PROBE D Heater Cable - Connection for power and temperature signal to Junction Box or Heater Probe. TEMP SELECT HEATER CABLE E Junction Box - Heater probe terminal connection. F HOWELL INSTRUMENTS, INC. FORT WORTH, TEXAS U.S.A. HEATER PROBE F Heater Probe (model no. and quantity determined by engine application). Probe Control Module Inc. • 8945 South Freeway Howell Instruments, • caling information is retained permanently in S memory unless changed by the operator. • Fort Worth, Texas 76140 www.howellinst.com • 817-336-7411 • Fax: 817-336-7874 • info@howellinst.com ©2009 Howell Instruments, Inc. PET112JD 1 JETCAL® is a registered trademark of Howell Instruments, Inc. Howell Instruments, Inc. 8945 South Freeway Fort Worth, Texas 76140 www.howellinst.com 817-336-7411

Portable engine test sets & trimmers Portable engine test sets & trimmers Speed/Frequency Measurement Data Printout The speed/frequency measurement system is designed to display engine speed when supplied with input signals from standard aircraft tachometer generators or from monopole pickups. The RPM Select Switch allows any one of three speed inputs to be selected: The BH112JD is a ruggedized unit capable of operating in severe environmental conditions (–40 to +70 °C ambient temperature) encountered on the flight line. The BH112JD is designed to store data for printout by an internal...