Aetna HP6492 Manuel d'utilisateur télécharger pdf

PRECISION SENSITIVE DIGITAL TACHOMETER

INSTAllATION INSTRUCTIONS

Special Instructions for '-SM'&'-SH' Versions

Aetna Engineering Precision Sensitive Digital

Tachometers are premium quality instruments.

Th.ey use "LSI" digital circuitry to provide an

instrument guaranteed accurate to one RPM,

that. never requires calibration, and performs

reliably in the marine environment.

The '-S_' version tachometers are supplied with

a special ratio setting designed to operate from

the signal provided from a "mag-pickup. or other

sensor which receives a particular number of

pulses-per-revolution (PPR) from the rotating

device to be measured. The PPR ratio refers to

the preset number of pulses the tachometer

must detect for each revolution of the apparatus

to be measured. The '-SM' version is rated for

use between 28 and 90 PPR and the '-SH'

version is rated for use between 90 and 255

PPR. The overc:ill tachometer performance

involvesfunctions beyond the PPR ratio, such as

filter constants and signal sensitivity. Therefore,

the correct version, '-SM' or '-SH' must be used

for the specific PPR ratio desired or satisfactory

performancewill not be realized.

The tachometers are available with either Light

Emitting Diode (LED-Model 8402) or Liquid

Crystal Display (LCD-Model 8905) readouts.

The LED is best suited for use in shaded

sunlight while the LCD should be used in

applications where the tachometer will be

exposed to direct unshaded sunlight. Both are

self-illuminated for night viewing.

The tachometers are supplied with a choice of

black or polished stainless steel bezel. The

black bezel tachometer includes a trim ring

which can be optionally used as required to

match existing. instrumentation. Aetna

tachometers also fit perfectly inside both the

round and square VDO Blue Line cases (contact

us for detailed instructions).

Mounting:

Select a mounting location where the tachometer

may be easily read. The front of the tachometer

has a gasketed glass-to-metal seal making it

suitable for use in locations exposed to rain and

spray. It uses only non-ferrous materials so it

can be located in close proximity to a compass

without significantly affecting the compass

(nevertheless, the compass adjustment should

be checked after installation; particularly

because the removed tachometers may have

been influencing the compass). The unit may be

installed in an existing standard 3-3/8 inch

diameter hole. It will fit holes up to 4 inches

when used with the optional black trim ring. If

placing the tachometer under a protective glass

cover, be sure that it is adequately ventilated to

keep the maximum temperature of the case

below 175 degrees Fahrenheit. Exceeding this

case temperature may damage the tachometer.

Mount the tachometer using the clamp and

hardware provided. In exposed locations it

should be bedded down with a bead of sealant

behind the flange. Place the tach in the raised

trim ring if it is to be used. If the trim ring is

positioned so that it will collect water, drill a

3/16" drain hole at the lowest point in the ring.

The clamp legs may be bent over or cut off to

accommodate thicker panels. An O'ring is

included for use as. a centering aid when

installing the unit in 3-3/8 inch holes. If the hole

is tight, roll the O'ring back from the flange then

insert the tach so that the O'ring rolls into the

hole as the tach is inserted. For larger holes an

Oaring type spacer may be made from a length

of appropriate diameter wire.

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Résumé du contenu

Page 1 - INSTAllATION INSTRUCTIONS

PRECISION SENSITIVE DIGITAL TACHOMETERINSTAllATION INSTRUCTIONS.Special Instructions for '-SM'&'-SH' VersionsAetna Engineering

Page 2 - Diesel Sender Installation:

Wiring:During wiring it is recommended that thenegative battery cable be removed from thebattery or the master switch(es) turned off.The tachometer ha

Page 3 - Testing:

Testing:Reconnect the battery and turn the ignition on.The display should illuminate and show "0000"indicating power is reaching the unit. S

Page 4 - INSTRUCTIONS

.Aetna DigitalTachometersSWITCH SETTINGINSTRUCTIONSFor use by Factory Authorized personnel- OnlyVersion'-SM'V-ersion'-SH'PPRSwitch

Page 5 - SWITCH SETTING INSTRUCTIONS

Aetna Digital TachometersSWITCH SETTING INSTRUCTIONSFor use by Factory Authorized Personnel OnlyVersion'-SH'PPRSwitch PositionPPRSwitch Posi

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Aetna HP6492 Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Moteur Aetna HP6492. Aetna HP6492 User's Manual Manuel d'utilisatio

Résumé du contenu

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