RS 445-9557 User Manual

Laser, PHOTO
TACHOMETER

RS 445-9557

TABLE OF CONTENTS

1. FEATURES...................................................................... 1

2. SPECIFICATIONS............................................................ 1

3. FRONT PANEL DESCRIPTION..........................................

.

3

3-1 Reflectin

g

Mark........................................................3

3-2 Laser Li

g

ht Beam..................................................... 3

3-3 Monitor indicator......................................................3

3-4 Display.................................................................... 3

3-5 Measurin

g

Button.....................................................3

3-6 Memory Call Button.................................................

.

3

3-7 Battery Compartment............................................... 3

4. MEASURING PROCEDURE...............................................

.

4

5. OPERATION PROCEDURE FOR MEMORY RECALL........ 4

6. BATTERY REPLACEMENT................................................. 4

1. FEATURES

*Laser li

g

ht detecting source, long measuring range up to 2
meters, it is useful in the RPM measurement application
where the machine would be a risk to the operator or
close access is difficult or not possible.

* Wide measurin

g

range from 10 to 100,000 RPM, 0.1

RPM resolution for the measured value < 1000 RPM.

* Microprocessor based circuit, crystal time base, hi

g

h

precision with 0.05% accuracy.

*Hi

g

h visible LCD display gives RPM reading exactly with

no

g

uessing or errors & saves battery energy.

* Memory with recall function, the last value, max., value,

min. value will be stored into the memory automatically.

* The use of durable, lon

g

lasting components, includin

g

a strong, light weight ABS plastic housing, assures
almost maintenance free performance for many years.

2. SPECIFICATIONS

Display 5 digits, 10 mm ( 0.4" ) LCD ,

with function annunciation.
Measurement & Range 10 to 99,999 RPM.
Resolution 0.1 RPM ( <1,000 RPM).

1 RPM ( 1,000 RPM ).
Accuracy ( 0.05% + 1 digit ).

1

Detecting 50 - 2,000 mm typically.
distance

* Spec. of detecting distance are that under

the size of reflecting tape is 10 mm square
& the measuring RPM value is 1,800 PPM.
The max. detecting distance may change
under different environment, different
reflecting tape or the measuring RPM
beyond 1800 PRM.

Laser light * Less than 1 mW.
source * Class 2 laser diode. Red. Wave

len

g

th is 645 nm approximately.
Time base Quartz crystal, 4.194 MHz.
Circuit Exclusive one-chip of microcomputer

LSI circuit.
Operating Temp. 0 - 50 蚓 ( 32 - 122 蚌).
Operating Humidity Less than 80% R.H.

Memory Last / Max. / Min. ... value.

Battery 4 x 1.5V AA ( UM-3 ) battery.
Power Consumption Approx. DC 20 mA.
Size 190 x 72 x 37 mm

( 7.5 x 2.8 x 1.5 inch )
Weight 250g ( 0.55 lb )/including battery.

Accessories Carrying case...................... 1 PC

Included Reflecting tape marks

( 600 mm )......................... 1 PC

Operation manual............... 1 PC

2

3. FRONT PANEL DESCRIPTION

Fig. 1

3-1 Reflecting Mark 3-5 Measuring Button
3-2 Laser Light Beam 3-6 Memory Call Button
3-3 Monitor indicator 3-7 Battery Compartment
3-4 Display

3

4. MEASURING PROCEDURE

Apply a reflecting mark to the object being measured.
Depress the " Measuring Button " ( 3-5, Fig. 1 ) & align
the " Laser Light Beam " ( 3-2, Fig. 1 ) with the applied
target. Verify that the " Monitor Indicator " (3-3, Fig. 1)
lights when the target pass through the light beam. Release
the " Measuring button " when the reading stabilizes ( about
2 seconds ).

CAUTION :

LASER RADIATION -

DO NOT STARE INTO
LASER BEAM

* Class II laser products.

Note :
If the measured RPM values is very low, for example
less than 50 RPM, recommend to attach more
"Reflecting Marks" to the object average. It will get
the real RPM with high resolution, precisely & fast
sampling time when divided the reading values by the

no. of the " Marks ".

4

5. OPERATION PROCEDURE FOR MEMORY

RECALL

1) The readout of " last value ", " max. value " & " min. value "

can be obtained immediately & memorized into the
circuit automatically before turning off the " Measuring
Button ".

Fig. 2

2) When finish the measuring procedures ( after release the

measuring button ), the memorized values can be displayed
on the LCD display whenever :
a)

First push the " Memory Call Button " ( 3-6, Fig. 1 ) -

To display the last value ( " LA " and the " last value "
will be displayed alternately ).

b)

Second push the " Memory Call Button " -

To display the maximum value ( " UP " and the " max.
value " will be displayed alternately ).

c)

Third push the " Memory Call Button " -

To display the minimum value ( " dn " and the " min.
value " will be displayed alternately ).

5

6. BATTERY REPLACEMENT

1) When the LCD display appear " LO ", it is necessary to

replace the battery, However in-spec measurement may
still be made for several hours after low battery indicator
appears before the instrument become inaccurate.

2) Slide the " Battery Cover " ( 3-7. Fig 1 ) away from the

meter and remove the batteries

3) Replace with new batteries correctly into the battery

compartment and reinstate the cover.

6

0011-DT2234BL-RS