WIRING AND OPERATION

WARNING: Disconnect All Power before performing wiring operation. Keep power leads away from input leads.

 

MTH6 Back View

CAUTION: Connecting full battery

 

1

 

 

 

 

 

9

potential to terminal 9 can cause damage

 

 

 

 

 

 

to the SWICHGAGE®. Shutdown circuit

 

2

3

 

 

 

 

8

is rated for 300 mA continuous.

 

4

5

6

7

 

 

 

 

 

 

Circuit grounds out at set point.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

See Note 3

Display

 

 

 

See

 

 

 

 

Light

 

 

 

 

 

 

 

 

 

Note 1

 

 

 

Switch

 

 

 

See

 

 

 

 

 

 

 

Overspeed Load 2 A, 50 Vdc

 

 

--Supply

 

 

 

 

 

 

Note 2

(example: 518PH TATTLETALE®

 

 

+

8-40 Vdc

 

 

 

magnetic switches; SAH MINI-SIREN®;

 

 

 

 

 

 

 

TL7 Flashing Alarms)

 

 

 

 

 

 

 

 

NOTE 1: Apply momentary ground to reset

 

 

 

Magnetic Pickup

hours to zero.

 

 

 

 

 

 

 

NOTE 2: When using the MTH6 with inductive

 

Shield

 

loads, we recommend installing a

 

 

 

suppression diode across all coils.

 

 

Grd.

 

NOTE 3: Terminals 4 and 8 may be grounded

 

 

 

Alternator

on negative ground power supply.

 

 

 

 

 

 

 

NOTE 4: Alternator must be equipped with a

 

 

Tachometer

tach terminal (auxiliary AC terminal).

 

terminal

See Note 4

Wiring the MTH6 Refer to Typical Wiring Diagram, below.

Operation Sequence and Adjustments

When power is applied, the MTH6 performs an LCD test displaying counting down to zero within 3 seconds. The MTH6 will perform a normal scan, and will begin to monitor engine RPM. When the unit is in

Normal Scan, it displays RPM. The display is updated internally every second.

Viewing the Elapsed Time Hours ()

1.To view the elapsed hours, press ENTER () while in Normal Scan.

2. will be displayed followed by elapsed hours.

3.To clear/reset to zero, apply a momentary ground to terminal #5. The hourme- ter cannot be reset when a speed signal is present (normal operation).

NOTE: When speed input is present the first digit and decimal point will flash. Decimal point will NOT appear after 10,000 hours have elapsed.

Pulses Per Revolution (

) Calibration

1.To view the current pulses per engine revolution, press ENTER () while

in Normal Scan.

will be displayed followed by the running hours.

2.Press ENTER (). will be displayed followed by the present number of pulses per revolution. The factory setting is 60. Unit will display input fre-

quency with this setting.

MTH6 Module Detail

FRANK W.

®

Display

 

 

MFR.

 

Overspeed

SETPOINT

MTH6

Up

Set Point

LED (light)

 

ENTER

 

Enter or

 

 

Down

Aknowledge

 

 

3.To calculate the pulses per engine revolution () follow the instructions:

Magnetic Pickup: Determine the number of teeth on the engine’s flywheel. The number of teeth is equal to the number of pulses per engine revolution.

Battery Charging Alternator: Multiply the ratio of alternator to engine pulley diameter, times, the number of poles of the alternator divided by 2 to determine the correct pulses per engine revolution.

When the number of pulses per revolution is unknown, follow this procedure:

1. Set the pulses per revolution on the MTH6 to “60”.

2. Run the engine at a constant speed and measure the actual RPM using a hand- held tachometer or any means which measures actual RPM.

3.Read the RPM displayed on the MTH6 (this is the frequency in hertz caused by the engine speed).

4.Multiply the RPM reading on the MTH by 60, then divide by the actual RPM read by the handheld device. Set this resulting number as the pulses per revolution on the MTH6.

NOTE: If pulses per revolution are not a whole number, for example: 21.5, a setting of 21 will read slightly high and a setting of 22 will read slightly low.

4.To change the setting first remove the input signal. Press UP () to increase the value. Press DOWN () to decrease the value.

5.Once the number of pulses per revolution is set, press ENTER () to save.

is displayed indicating that the new number is saved.

6.Connect the input signal back in place (refer to typical wiring diagram at left).

Overspeed Set Point (HISP) Calibration

1.To view the current Overspeed set point, press ENTER () while the MTH6 is in Normal Scan.

2.will be displayed followed by the amount of elapsed hours.

3.Press ENTER () with elapsed time visible. will be displayed fol- lowed by the number of pulses per revolution.

4.Press ENTER (). will be displayed followed by the overspeed set point previously entered. Factory setting is 1500.

5.Press UP (), to increase the overspeed setting. Press DOWN () to decrease the setting.

6.Press ENTER (), will be displayed indicating that the new value is now saved.

Warranty

A limited warranty on materials and workmanship is given with this FW Murphy product.

A copy of the warranty may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm

FW Murphy

P.O. Box 470248

Tulsa, Oklahoma 74147 USA

+1 918 317 4100 fax +1 918 317 4266 e-mailsales@fwmurphy.com

www.fwmurphy.com

INDUSTRIAL PANEL DIVISION

P.O. Box 470248

Tulsa, Oklahoma 74147 USA

+1 918 317 4100 fax +1 918 317 4266 e-mailsales@fwmurphy.com

MURPHY DE MEXICO, S.A. DE C.V.

Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje San Luis Potosí, S.L.P.; México 78384

+52 444 8206264 fax +52 444 8206336 Villahermosa Office +52 993 3162117 e-mailventas@murphymex.com.mx www.murphymex.com.mx

FRANK W. MURPHY, LTD.

Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K. +44 1722 410055 fax +44 1722 410088 e-mailsales@fwmurphy.co.uk www.fwmurphy.co.uk

Printed in U.S.A.

In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.

MTH-96116N page 2 of 2

Page 2
Image 2
Murphy MTH6 Operation Sequence and Adjustments, Viewing the Elapsed Time Hours, Pulses Per Revolution Calibration

MTH6 specifications

The Murphy MTH6 is a state-of-the-art digital engine monitor designed for a wide range of applications in aviation and industrial settings. Known for its reliability and advanced features, the MTH6 offers users precise measurement and monitoring of critical engine parameters. This device is particularly favored for its ease of use, robust construction, and its ability to process complex data into easily interpretable readings.

One of the standout features of the MTH6 is its multi-function display that provides real-time data visualization of engine performance. Users can view vital parameters such as engine temperature, fuel pressure, oil pressure, RPM, and voltage through a bright, easy-to-read screen. The display is designed to provide clear alerts and notifications for any operational anomalies, ensuring that operators can take immediate action when necessary.

The MTH6 utilizes advanced sensor technology for accurate readings. Its built-in sensors are capable of capturing critical data with high precision, providing users with confidence in their monitoring processes. The device is also equipped with programmable alarms that allow users to set custom thresholds for various parameters, ensuring that potential issues can be identified before they escalate into serious problems.

Additionally, the Murphy MTH6 boasts a robust construction designed to withstand the rigors of demanding environments. It is built with durable materials that ensure longevity and reliability, making it suitable for both aircraft and industrial engine applications. This durability is complemented by its resistance to extreme weather conditions, vibration, and corrosive substances.

Another notable aspect of the MTH6 is its versatility in installation and integration. The device is designed to be easily mounted in various configurations, which simplifies setup in different vehicles and machinery. Its compatibility with both analog and digital inputs makes it an adaptable choice for modern engine systems.

Moreover, the Murphy MTH6 is backed by extensive customer support and service options, ensuring users have access to the information they need to maximize the benefits of their engine monitoring capabilities. With its cutting-edge technology, impressive features, and durable design, the Murphy MTH6 stands out as an essential tool for those looking to enhance engine performance monitoring and ensure operational efficiency.