Model MTH6 Tach/Hourmeter Overspeed Switch Installation and Operation Instructions

MTH-96116N

Revised 04-05

Section 20

(00-02-0778)

Please read the following information before installing. A visual inspection of this product for damage during shipping is recommended before mounting. It is your responsibility to have a qualified person install this unit.

GENERAL INFORMATION

Dimensions

WARNING

BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT

Disconnect all electrical power to the machine.

Make sure the machine cannot operate during installation.

Follow all safety warnings of the machine manufacturer.

Read and follow all installation instructions.

Side View

3-1/8 in.

(79 mm)

Mounting

Bracket

3-33/64 in.

(89 mm) Diameter

Front View

15/32 in. (12 mm)

FRANK W.

®

 

 

MFR.

3-5/8 in.

 

 

(92 mm)

 

MTH6

Diameter

SETPOINT

 

 

ENTER

Description

Microprocessor-based digital tachometer and hourmeter with a built-in overspeed switch. This Murphy instrument is highly accurate and depend- able. It measures speed and running hours and can give an alarm or shut down the engine on overspeed.

RPM data for the tachometer and overspeed switch is supplied by a mag- netic pickup or a battery charging alternator equipped with a “Tach” termi- nal (auxiliary AC terminal). The magnetic pickup is installed into the fly- wheel housing of an internal combustion engine, so that the starter ring gear acts upon it to generate a voltage pulse each time a gear tooth passes the end of the magnetic pickup.

Specifications

Power Requirements: 8-40 VDC (12, 24 or 32 VDC system).

Maximum Current:

Mounting Hole

3-3/8 in. (86 mm) Dia.

Back View

3-9/16 in.

(90 mm)

FRANK W.

®

 

MFR.

1

9

 

2

 

 

 

 

8

3

4

 

 

7

5

6

 

 

 

 

12 VDC: 0.011 A, backlight Off; 0.025 A, backlight On.

24 VDC: 0.008 A, backlight Off; 0. 015 A, backlight On.

32 VDC: 0.007 A, backlight Off; 0. 010 A, backlight On.

Operating Temperature: -4° to 158°F (-20° to 70°C).

Storage Temperature: -40° to 185°F (-40° to 85°C).

Case: 1018 Polycarbonate/Polyester blend.

Speed Input: 4.5 Vrms minimum.

Input Frequency Range: 25 Hz to 20 kHz.

Overspeed Switch Rating: 2 A, 50 VDC.

Overspeed Range: 0 to 9000 kHz.

Pulses per Revolution: 4 to 255.

Tachometer Range: 0 to 65,535 RPM.

Tachometer Accuracy: ±1% of display reading, or -2 RPM whichever is greater.

Hourmeter Range: 0 to 99999 hrs.

Hourmeter Resolution: ±0.1 hour to 9999.9; ±1 hour 10,000 and up.

Reset Hourmeter: Ground terminal #5 to reset hours to zero.

Shipping Weight: 14 oz. (435 g).

Shipping Dimensions: 5-1/2 x 5-1/2 x 5-1/2 in. (140 x 140 x 140 mm).

MTH6 Mounting Schematic

To mount the MTH6 to your panel, a 3-3/8 in. (86 mm) diameter mount- ing hole is required. Remove the mounting bracket and lock nuts (provid- ed with the unit).

Insert the MTH6 module from the front of the panel, see schematic below. Replace mounting bracket and secure in place with the lock nuts.

 

 

Mounting Hole

Mounting

 

 

Bracket

MTH6 Module

 

 

FRANK

®

 

 

W.

 

 

MFR.

 

 

SETPOINT

MTH6

 

 

 

 

Nuts to

 

ENTER

 

Secure Mounting (provided)

Panel

MTH-96116N page 1 of 2

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Murphy specifications Dimensions, Description, Specifications, MTH6 Mounting Schematic

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.