MONARCH INSTRUMENT
Instruction Manual
POCKET-TACH 100
Printed in the U.S.A.
© Monarch Instrument 2001 all rights reserved
1071-4834-001
Rev 1.4
15 Columbia Drive
Amherst, NH 03031 USA
Phone: (603) 883-3390
Fax: (603) 886-3300
E-mail: sales@monarchinstrument.com
Website: www.monarchinstrument.com
WARNINGS
Do not use this instrument in any manner inconsistent with these operating instructions or under any conditions that exceed the environmental specifications stated.
Making measurements in direct contact with rotating equipment can be dangerous. Keep all
loose clothing and hair away from exposed moving machinery. Keep the hand holding the instrument well behind the back end of the Contact Tip Assembly.
Do not use this instrument for contact measurements that exceed 20,000 RPM or 20,000 IPM.
Properly replace all machinery guards after completing measurement.
DECLARA TION OF CONFORMITY
As Manufacturer:
Monarch Instrument
Division of Monarch International Inc.
15 Columbia Drive, Amherst NH 03031 USA
declares under Monarch’s sole responsibility that the product:
Product: Hand Held Tachometer
Model: POCKET-TACH 100
to which this declaration relates is in conformity with the following standards:
Low Voltage Directive:
IEC 1010-1 (EN 61010-1) Safety Requirements for Electrical
Equipment for Measurement, Control, and
Laboratory Use.
and therefore conforms with the requirements of Council Directive 73/23/EEC and
93/68/EEC relating to the low voltage directive with amendments.
For technical assistance, contact the sales organization from which you
purchased the product. If they cannot assist you, they will refer you to
the manufacturer.
1st March 1997
Manufacturer (Amherst,NH) Alan Woolfson, VP Engineering (Authorized Signature)
OPTIONS AND ACCESSORIES
CC-5 Latching Carrying Case for POCKET-TACH and
accessories
CC-6 Padded Nylon Carrying Case (supplied with
POCKET-TACH 100)
CTA-1 Contact Tip Assembly with convex and concave tips for
POCKET-TACH 100
CT-TIPS One CT-2P convex tip, one CT-3C concave tip and 1 set
of Nylatch
T-5 Reflective Tape - 5-foot (1.5M) roll, 0.5 inch (10mm) wide
CAL-N.I.S.T N.I.S.T. Traceable Certificate of Calibration (for non-con-
tact measurements only)
® fasteners
only
TABLE OF CONTENTS
TABLE OF CONTENTS
Specifications ................................................................. 1
Introduction ..................................................................... 1
Non-Contact Measurements ........................................... 2
Contact Measurements ................................................... 3
Battery ............................................................................ 6
Cleaning ......................................................................... 6
Calibration ...................................................................... 6
Options and Accessories ............................................... 7
7
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
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 POCKETTACH 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.
INTRODUCTION
POCKET-TACH 100 is a precision instrument designed to make non-contact measurements of rotational speeds from 5 to 100,000 RPM, at a distance 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 padded 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). CTA1 is supplied with convex and concave tips for rotational speed measurements of various shaft diameters. The concave tip is one inch in circumference and is used to measure and display linear speeds directly in inches
per minute.
1
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
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.
±2 counts.
6
For surface speed measurements, gently contact the side
of the concave tip flat against the surface of the object
to be measured.
NOTE: Only a moderate amount of pressure is required to keep
the contact tip in contact with the moving object. Undue pressure can cause erroneous readings and excessive wear to the Contact Tip Assembly.
3. Hold the instrument in position, and press the power
button until the reading is complete. A steady illumination of the “bull’s eye” symbol in the instrument display will indicate proper alignment of the contact tip
with the moving object.
NOTE: Rotational speed measurements read directly in RPM.
Surface speed measurements read directly in inches per
minute (IPM). (The display will not actually say IPM.)
4. When the measurement is complete, release the power
button while still in contact with the equipment.
5. Remove the instrument from contact with the equipment.
POCKET-TACH will continue to display the last reading for approximately 90 seconds and then automatically shut off.
Detaching the Contact Tip Assembly
To detach the Contact Tip Assembly, pull the grip of each of the
Nylatch
® fasteners to release them from the back of POCKET-TACH.
Remove the Contact Tip Assembly by gently pulling it from the back
of the instrument.
NON-CONTACT MEASUREMENTS
Preparation
To prepare a shaft for non-contact measurement of speed, carefully
clean an area of the shaft of all grease and dirt and apply a piece of
reflective tape to the cleaned surface. Typically, a half-inch square of
reflective tape is convenient. For smaller shafts, smaller pieces of tape
down to approximately 1/8 inch (3mm) in length may be used. Always
use the T-5 reflective tape supplied. Additional T-5 tape is available in
five-foot (1.5M) rolls (see section 8.0 Options and Accessories).
Aiming
The ergonomic design of POCKET-TACH makes the non-contact
measurement of speed extremely simple. Aim POCKET-TACH at the
reflective target using the sight bars on the top surface of the instrument as an aid in locating the target. A visible light projects from the
underside of POCKET-TACH parallel to the top surface and in line
with the sight bars. This design allows you to view the target on the
rotating shaft and the display on the instrument simultaneously.
Measuring
To measure, press and hold the power button on the front panel and
aim the instrument at the reflective tape on the shaft until a steady illumination of the “bull’s eye” symbol in the instrument display indicates
you are on target. For speeds above 200 RPM, wait for three updates
of the display for the instrument to stabilize. At lower speeds, a few
additional updates may be required for the instrument to initially “lock
on”. Once a measurement is complete, release the power button while
still viewing the target. POCKET-TACH will continue to display the
last reading for approximately 90 seconds and then automatically
shut off.
5
2
CONTACT MEASUREMENTS
(Rotational Speed or Surface Speed)
POCKET-TACH can measure rotational speed by directly contacting a rotating shaft or surface speed such as a moving belt or web. Contact measurements require the use of the CTA-1 Contact Tip Assembly. CTA-1 is
attached to the lower side of POCKET-TACH with two Nylatch
which lock into mounting holes in the bottom of the instrument.
Attaching the Contact Tip Assembly
(see Figure 1)
To assemble:
1. Pull back on the grips on the two Nylatch
Contact Tip Assembly to insure they are in the released (pulled
out) position.
CAUTION: Do not attempt to pull them beyond the unlocked
position (loose feel).
2. Insert the sight bars on POCKET-TACH into the correspond-
ing notch in the top of the Contact Tip Assembly (above the
window exposing the shaft).
POCKET-TACH 100
Contact Tip Assembly
Nylatch® fastener
Insert sight bars
into notch
Notch
® fasteners
® fasteners on the
Shaft
3. Push the Contact Tip Assembly flush against POCKETTACH so that the fasteners fit into the two mounting holes
on the underside of POCKET-TACH.
4. Secure the tip assembly by firmly pushing both Nylatch
fasteners until they snap securely in place.
5. Select either a convex or concave tip appropriate for the measurement to be made and install it firmly on the shaft extension of the CTA-1.
NOTE: The rubber tips are keyed to mate with the shaft. En-
sure the surfaces mate correctly.
Contact Tip Selection
For rotational speed measurements, use the convex (conical) tip for
shafts equipped with a turned center. Use the concave (inverted conical) tip for smaller diameter shafts.
For surface speed measurements, use
only the concave tip.
Making Contact Measurements
WARNINGS:Making measurements in direct contact with rotat-
ing equipment can be dangerous. Keep the hand
holding the instrument well behind the back edge of
the Contact Tip Assembly. Do not use this instrument for contact measurements that exceed
20,000 RPM or 20,000 IPM.
To make a measurement:
1. Start the moving object to be measured.
2. For rotational speed measurements, carefully contact
the appropriate tip (convex or concave, see section 4.2
Tip Selection) against the axial end of the rotating shaft.
®
3
Figure 1 Attaching the Contact Tip Assembly
4
Loading...