Extech Instruments 461960 User manual

User's Guide
RPM Controller / Monitor
Model 461960
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
Back to the Extech 461960 Product Page
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com

461960 V1.1 8/07
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Introduction
Congratulations on your purchase of the Extech 461960 RPM Controller/Monitor. This
meter is shipped fully tested and calibrated and, with proper use, will provide years of
reliable service.
Features
∗Professional Tachometer ( RPM, m/min., ft/min. ) monitor and controller.
∗Build in control relay and alarm relay.
∗Alarm Relay will close when the measured value reaches the high or low alarm
value.
∗Control Relay will close when the measured value reaches the control value.
∗Hysteresis value setting for control and alarm function.
∗Set the number of input pulses per revolution.
∗Settable roller diameter for the surface speed ( m/min., ft/min. ) function.
∗Works in conjunction with the optional proximity or photo sensor.
∗Large easy to read red LED display.
∗RS232 computer interface for use with optional software.
∗Microprocessor circuit ensures high accuracy and provides special functions and
features.
∗Standard 96 X 48 mm DIN case.
∗Optional data acquisition software.
Warranty
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects
in parts and workmanship for one year from date of shipment (a six month limited warranty
applies to sensors and cables). If it should become necessary to return the instrument for
service during or beyond the warranty period, contact the Customer Service Department at
[phone] ext. 210 for authorization or visit our website www.extech.com for contact
information. A Return Authorization (RA) number must be issued before any product is
returned to Extech. The sender is responsible for shipping charges, freight, insurance and
proper packaging to prevent damage in transit. This warranty does not apply to defects
resulting from action of the user such as misuse, improper wiring, operation outside of
specification, improper maintenance or repair, or unauthorized modification. Extech
specifically disclaims any implied warranties or merchantability or fitness for a specific
purpose and will not be liable for any direct, indirect, incidental or consequential damages.
Extech's total liability is limited to repair or replacement of the product. The warranty set
forth above is inclusive and no other warranty, whether written or oral, is expressed or
implied.

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Safety
International Safety Symbols
Caution : Risk of electric shock !
This symbol, adjacent to a terminal, indicates that, under normal use, hazardous
voltages may be present
Caution : Risk of electric shock !
This symbol, adjacent to another symbol or terminal, indicates the user must refer
to the manual for further information.
Equipment protected throughout by Double Insulation or Reinforced Insulation.
Safety Procedures
∗Do not use fingers or any tool to touch the Wire Terminals.
∗Do not exceed 0.5A relay contact load.
∗The instrument contains no user serviceable parts and should not be opened
by the user.
∗Repair or service should be done by a qualified technician only.
∗Always apply the correct ACV power voltage
∗Cleaning - Only use the dry cloth to clean the plastic case !
Operating conditions
∗Comply with EN61010. Transient overvoltage at Mains Supply 2500V.
∗Pollution Degree 2.
∗Altitude up to 2000 meters.
∗Indoor use.
∗Relative humidity 80% max.

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Meter Description
1. Display
2. PV ( process value ) indicator
3. SV ( set value ) indicator
4. Set Button
5. ▼Button
6. ▲Button
7. Function Button
8. Control relay indicator
9. Alarm relay indicator
10. RPM indicator
11. ft/min indicator
12. m/min indicator
13. Wire terminals
14. Case holder
15. RS232 terminal
Terminal connections
Do not input an over voltage to the AC input terminals
1. Input the ACV power (90 to 260 ACV) to T1, T2.
2. Connect the "Control Relay" output from T3, T4.
3. Connect the "Alarm Relay" output from T5, T6. 3)
4. Connect the proximity or photo sensor to the input terminal T8, T9, T10.
T8 is DC 12 V power supply terminal.
T9 is the ground ( - ) terminal.
T10 is the pulse input terminal.

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Operation
RPM measurement
1. Apply power to the meter.
2. Press the “Function Button" once until the "RPM” and the "PV" indicators
are on.
3. The display will indicate the RPM value.
4. The RPM value equals :
Total input signal (pulse) per min.
Number of pulses per revolution
Example:
If the total signal (pulse) input per minute is 5,124, the number of pulses per revolution
is set to 1, the RPM value will be; 5,124/1 = 5,124
Surface speed ( m/min., ft/min. ) measurement
1. Apply power to the meter
2. Press the "Function” button once until the "m/min” indicator is on. The display will
show the m/min. value.
3. Press the "Function” button once until the "ft/min” indicator is on. The display will
show the ft/min. value.
4. Under the surface speed measurement, the "PV” indicator will also light.
5. To calculate m/min:
Total input signal ( pulse ) per min. x roller diameter ( cm ) x 3.14
÷ 100
Number of pulses per revolution
Example: If the total input signal (pulse) per minute is 501, the number of pulses per
revolution is set to 1, the roller diameter is 10 cm the m/min. value will be;
501/1 x 10 x 3.14/100 = 157.3
6. To calculate ft/min:
Total input signal ( pulse ) per min. x roller diameter ( cm ) x 3.14
÷ 30.48
Number of pulses per revolution
Example: If the total input signal (pulse) per minute is 501, the number of pulses per
revolution is set to 1, the roller diameter is 10 cm the ft/min. value will be;
501/1 x 10 x 3.14/30.48 = 516.1

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1st layer setting procedures
CtSP Control value setting
LoLt Low limit value setting
HILt High limit value setting
Control Value Setting
1. Press the "Set” button" once, the display will show " CtSP ", the meter is now ready
for the " Control value " setting.
2. Use the "▼” button and the "▲” to adjust the desired "Control value".
Note: When adjusting the value, the "SV” indicator will light.
Low Limit Value Setting
1. Press the "Set” button" twice, the display will show " LoLt ", the meter is now ready
for the " Low Limit value " setting.
2. Use the "▼” button and the "▲” to adjust the desired "Low limit value ".
Note: When adjusting the value, the "SV” indicator will light.
High Limit Value Setting
1. After setting the "Low Limit" value, press the "Set” button twice, the display will
show "HILt", the meter is now ready for the humidity "High Limit" value setting.
2. Use the "▼” button and the "▲” to adjust the desired "High limit value ".
Note: When adjusting the value, the "SV” indicator will light.
1st layer setting considerations;
1. Under the normal display, if the "Function” button is set to the "RPM function" and
the "RPM” indicator is on, then the 1st layer setting procedures will ready for the
"RPM" function.
2. Under the normal display, if the " Function” button is set to the "m/min. function",
and the "m/mi” indicator is on, then the 1st layer setting procedures will ready for
"m/min." function.
3. 3) Under the normal display, if the "Function” button is set to the "ft/min. function"
and the "ft/min” indicator " is on, then the 1st layer setting procedures will ready for
"ft/min." function.

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2nd layer setting procedures
PULS Pulse no. per revolution setting
dIA Roller diameter value setting
CtHy Control Hysteresis value setting
ALHy Alarm Hysteresis value setting
Pulse no. per revolution setting
1. Press the "Set” button continuously for at least two seconds, the display will show
"PULS", now the meter is ready for the "Pulse no. per revolution" setting.
2. Use the "▼” button and the "▲” button to adjust the desired "Pulse no. per
revolution".
Note: When adjusting the value, the "SV” indicator will light.
Roller diameter value setting
1. After setting the "Pulse no. per revolution", press the " Set” button twice, the display
will show dIA ", now the meter is ready for the "Roller diameter value" setting.
2. Use the "▼” button and the "▲” button to adjust the "Roller diameter value" in the
unit of cm.
Note: When adjusting the value, the "SV” indicator will light.
Control Hysteresis value setting
1. After setting the "Roller diameter value", press the "Set” button twice, the display
will show “CtHy", now the meter is ready for the "Control Hysteresis value" setting.
2. Use the "▼” button and the "▲” button to adjust the desired Hysteresis value".
Note: When adjusting the value, the "SV” indicator will light.
Example: Control value : 500, Control Hysteresis value : 5
The state of the control relay will stay On for measured values up to 500. The control
relay will turn Off when the measured value goes down to 495.

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Alarm Hysteresis value setting
1. After selecting the "Control Hysteresis value" , press the "Set” button twice, the
display will show " ALHy ", the meter is now ready for the "Alarm Hysteresis” value
setting.
2. Use the "▼” button and the "▲” button to adjust the desired Alarm Hysteresis
value.
Note: When adjusting the value, the "SV” indicator will light.
Example :
High limit value : 100, Low limit value : 20, Alarm Hysteresis value : 5
1. The alarm relay will be On when measuring value up to 100. The alarm relay will
turn Off again when measuring value down to 95.
2. The alarm relay will be On when measuring value down to 20. The alarm relay will
turn Off when measuring value up to 25.
SYSTEM RESET
Power on the meter. Use two fingers to press the "Set” button and "Function” button
continuously for more than 5 seconds until the display show the text "rSt". Release the
buttons. "rSt" will flash 2 times and the display will then to the normal screen. The meter
system will be reset, all the calibration data will be cleared and the meter's internal
functions will return to the default values.

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Specifications
General Specifications
Display 4 digits red LED, digit size : 14 mm.
RPM RPM
m/min ( meter per min. )
Unit
Surface speed ft/min ( feet per min. )
Circuit Custom chip of microprocessor LSI circuit.
Sampling Time
A
pprox. 1 second.
* Input : one pulse per revolution, ≥60 RPM
Two relays: Relay 1; Control relay, Relay 2; Alarm relay
Max Load: 0.5 ACA/250 ACV 0.5 DCA/24 DCV
Relay Output
Note: Do not apply a load current that exceeds 0.5A. Large
currents will damage the relay and also void the warranty.
Setting Value Control value setting. Alarm high limit value setting. Alarm low limit
value setting. Pulse no. of each revolution. Roller diameter value
setting. Hysteresis value setting.
* Setting for RPM, m/min., ft/min.
Input Signal Time base Pulse, Quartz crystal
Sensor Power Supply DC 12 V, 50 mA max.
Data Output RS 232 PC serial interface.
Operating Temperature 32 to 122°F (0 to 50 °C).
Operating Humidity Less than 80% R.H.
Power Supply 90 to 260 ACV, 50/60 Hz.
Power Consumption
A
pprox. 4.7 VA/AC 110V. Approx. 5.3 VA/AC 220V.
Weight 384 g/ 0.84 LB.
Dimension DIN size : 96 x 48 mm.
Depth : 110 mm.
Optional Accessories Proximity sensor, 461955. * Photo sensor, 461957.
Data Acquisition software, 407001A
Electrical Specifications (23±5 °C)
Photo Tachometer : 10 to 99,999 RPM
Range
Surface Speed ( m/min. ) :0.05 to 9,999 m/min.
Surface Speed ( ft/min. ) :0.2 to 32,805 ft/min.
A
ccurac
y
± ( 0.1 % + 1 digit ).
0.1 RPM < 1,000 RPM
1 RPM 1,000 to 9,999 RPM
RPM
10 RPM 10,000 to 99,999 RPM
0.01 m/min. <100 m/min.
0.1 m/min. 100 to 999 m/min.
m/min.
1 m/min. 1,000 to 9,999 m/min.
0.1 ft/min. < 1000 ft/min.
1 ft/min. 1,000 to 9,999 ft/min.
Resolution
ft/min.
10 ft/min. 10,000 to 32,805 ft/min.
•Above specification tests under the environment RF Field Strength less than 3
V/M & frequency less than 30 MHz only.

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E
461955 Proximity Sensor Specifications (23±5 °C)
Output method PNP, NO(normal open)
Sensing direction Vertical.
Sensing distance 4 mm.
Operating voltage 10-30 VDC.
Standard Sensing object Iron 18 x 18 x 1 mm.
Current consumption 8 mA, no load.
Response frequency 600 Hz.
Output current 250 mA max.
Leakage current 1.1 mA.
Residual voltage 0.9 VDC.
Operating Temperature -4 to 158°F (-20 to 70 °C)
Operating Humidity 35 to 95% RH.
Wire Dimension 4.7 mm Dia. x 2 m x 3 cores.
Cable length 6 ft (1.8 meters)
461957 Photoelectric Sensor Specifications
Range Up to 6000 RPM (100 Hz)
Power 12 - 24VDC ±10%; Consumption: 40mA max.
Response time < 1ms
Output NPN transistor; Max load 80mA
Photo beam color Green
Photo beam wavelength 5500 Angstroms
Cable length 6 ft (1.8 meters)
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
Back to the Extech 461960 Product Page
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com