Monarch Instrument POCKET-TACH 100 - Manual (Page 4)

SPECIFICATIONS
This product is designed to be safe for indoor use under the following conditions
(per IEC1010-1).
Temperature: 5°C to 40°C (0°F to 100°F)
Humidity: Maximum relative humidity of 80% for temperatures up to
31°C (88°F) decreasing linearly to 50% relative humidity at
40°C (100°F)
Pollution Degree: 2 per IEC 664
Power: 9VDC @ 70mA max; Battery Type IEC-6LR61, NEDA Type
1604 (PM9)
Ranges: Non-contact: 5 to 100,000 RPM
Contact:
5 to 20,000 RPM (rotational speed)
5 to 20,000 IPM (surface speed)
Accuracy: Non-contact: ±0.01% of reading
Contact:
±0.5% of reading typical
Display: 6-digit numeric LCD display with 0.3” digits, on-target indi-
cator (“bull’s eye”)
Resolution: 1 RPM
INTRODUCTION
POCKET-TACH 100 is a precision instrument designed to make non-con-
tact measurements of rotational speeds from 5 to 100,000 RPM, at a dis-
tance of up to 30 inches (0.75m) from a reflective target and at an angle of
up to 30° off perpendicular. POCKET-TACH is supplied with a CC-6 pad-
ded carrying case, 9-Volt alkaline battery and 12” of T-5 reflective tape.
N.I.S.T. traceable calibration is provided for non-contact operation.
The optional CTA-1 Contact Tip Assembly enables POCKET-TACH to make
contact measurements of rotational speeds in the range of 5 to 20,000 RPM
or surface speeds in the range of 5 to 20,000 inches per minute (IPM). CTA-
1 is supplied with convex and concave tips for rotational speed measure-
ments of various shaft diameters. The concave tip is one inch in circumfer-
ence and is used to measure and display linear speeds directly in inches
per minute.
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BATTERY
POCKET-TACH is powered from a single IEC Type 6LR61, NEDA 1604
(PM9) nine-volt dc alkaline battery (supplied). The battery is installed by
removing the sliding cover from the back of the instrument, connecting the
battery to the battery snap, and installing the battery into the compartment
with leads arranged so that they will not be damaged when replacing the
battery compartment cover.
The display flashing on and off indicates low battery, at which time POCKET-
TACH should operate for another fifteen minutes.
NOTE: Readings taken while the display is flashing are still accurate as
long as the “bull’s eye” is flashing at the same rate.
CLEANING
To clean the instrument, wipe with a damp cloth using a mild
soapy solution.
CALIBRATION
POCKET-TACH is a precision microprocessor-controlled digital instrument,
which requires no calibration. However, the accuracy of POCKET-TACH
can be verified at any time by aiming it at a fluorescent light and observing
7200
±2 counts. In countries with a 50 Hz. power line frequency, POCKET-
TACH will read 6000 ± 2 counts.
NOTE: An N.I.S.T. traceable Certificate of Calibration, applicable to non-
contact measurements only and valid for a period of one (1) year,
is provided with the instrument.
Please contact Monarch Instrument to have your POCKET-TACH
re-calibrated.
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