OVERVIEW. Monarch PORTABLE 1071-4860-122, Phaser Tach & Phaser Tach®, 1071-4860-122

BATTERIES

The Tachometer operates from four ‘AA’ size batteries which are located under the hinged top of the instrument. To access these batteries, grip the tapered cover at the optical lens end of the instrument and pull up. The cover is hinged at the display end of the instrument and pivots fully out of the way. It may also be convenient to keep a spare supply of reflective tape in the free area underneath this cover.

The instrument will provide six to eight hours of continuous operation on a single set of batteries, depending on the type used. The instrument is provided with a built-in charging network, which works in conjunction with the optional NiCad batteries. The optional recharger plugs into the single jack located next to the optical lens at the front end of the instrument.

Fourteen to sixteen hours is required for a complete recharge. When the battery voltage in the Phasar-Tach is getting low, the display will blink

“LO BAT” to indicate that the batteries need to be replaced.

NOTE: Only use model R-5B (115 Vac) or R-6B (230 Vac) rechargers with NiCad batteries. Do not attempt to charge non-rechargeable batteries.

ALWAYS DISPOSE OF BATTERIES IN A SAFE AND RESPONSIBLE

MANNER.

CLEANING

To clean the instrument, wipe with a damp cloth using mild soapy solution.

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Humidity: Maximum relative humidity 80% for temperature up to 88 °F [31 °C] decreasing linearly to 50% relative humidity at 104 °F [40 °C]

Dimensions (LxWxH):6.13” x 3.25” x 1.75 “ plus 4.75” handle

[155.7 mm x 82.6 mm x 44.5 mm x 120.7 mm]

Weight: 1.25 lbs [0.57 kg]

OVERVIEW

Each Phasar-Tach model combines the accuracy and safety of a non-contact optical tachometer with the convenience and ease of operation of a pistol grip instrument. The instrument provides non-contact measurement of rotational speed to an accuracy of .01% of reading. It reads RPM directly to the nearest RPM, and a ‘on-target’ indicator is provided to verify the instrument is properly aligned on a target and receiving valid information.

OPERATION

The Tachometer measures rotational speed from a single pulse per revolution.

This pulse is supplied by marking the rotating shaft with reflective tape in an easily accessible location. The Tachometer is equipped with a built-in incandescent or laser light source providing a beam which is aimed at the reflective tape located on the rotating shaft. The pulse from the reflective tape is received back through a single lens reflex optical system and detected by a photocell inside the instrument. The Tachometer then computes the rotational speed and displays it to a resolution of 1 RPM.

To operate the Phasar-Tach, simply aim it at the reflective tape while holding it at a distance of 1 inch [25.4 mm] to 3 feet [0.9 m] for incandescent lamp units or up to 15 feet [4.6 m] for laser units (observe laser safety precautions). Squeeze the pistol grip trigger, and read the indicated speed.

The on-target indicator must be on. The display is updated twice per second.

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