The TACHTROL20 Rate Meter, Model T77250-10, provides the versatility and flexibility needed to
accommodate virtually any rate measuring application. The meter has the ability to scale for direct
readout in terms of the units being measured. Whether a machine produces bottles, cloth, wire, or
beverage mix, operation is enhanced when the rate readout is expressed directly in bottles/min.,
feet/min., gallons/min., or whatever units are needed in plant applications.
The TACHTROL20 can accommodate magnetic pickups, logic sensors, and NPN open collector sensors.
The pulses are received and scaled, so the desired display can be achieved. The meter is programmed
through both the front panel buttons and DIP switches. Once the programming is complete, the front
panel buttons can be disabled by a DIP switch setting.
The meter has been specifically designed for harsh industrial environments. With a NEMA 4X/IP65 sealed
bezel and extensive testing to meet CE requirements, the meter provides a tough, yet reliable application
solution.
SAFETY SUMMARY
All safety related regulations, local codes and instructions that appear in the literature or on equipment
must be observed to ensure personal safety and to prevent damage to either the instrument or equipment
connected to it. If equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
152 Knotter Dr.
Cheshire CT 06410 USA
PH: 203-271-6000 Fax: 203-271-6200
www.aiteksensors.com
CAUTION:
Risk of Electric shock
CAUTION: Risk of Danger
Read complete instructions prior to
installation and operation of the unit. TM5-250_B
2
LP0859X 10/10
TABLE OF CONTENTS
Safety Summary…………………………………………………………..1
General Meter Specifications………………………..……………..2
Installing the Meter……………………………………………………….5
Setting the Switches……………….…………………………….….….6
Wiring the Meter…………………………………………………….……..7
Reviewing the Front Buttons and Display…………………...9
Scaling the Meter ………………………………………………….……..9
Programming the Meter………………………………….……….….11
GENERAL METER SPECIFICATIONS
1. DISPLAY: 6-digit, 0.56" (14.2 mm), 7-segment red LED. Decimal points are programmed by front
panel keys.
2. POWER:
AC Power: 115/230 VAC, switch selectable. Allowable power line variation ±10%, 50/60 Hz, 6 VA. @
100 mA max.
Isolation: 2300 Vrms for 1 min. to input and DC Out/In.
DC Power: 10 to 16 VDC @ 100mA max.
3. SENSOR POWER: 9 to 17.5 VDC @ 100mA max.
4. KEYPAD: 3 programming keys, the ▼ (Down Arrow) key can also function as the front panel reset
button.
5. INPUT: (DIP switch selectable)
Accepts pulses from a variety of sources including NPN-OC, PNP-OC, TTL Outputs and Magnetic
Pickups.
Logic: Input trigger levels V il, = 1.5 V max.; V ih, = 3.75 V min.
Current Sinking: Internal 7.8 K? pull-up to +12 VDC, I max = 1.9 mA
Current Sourcing: Internal 3.9 K? pull-down, 8 mA max. @30 VDC max.
MAGNETIC PICK-UP:
Sensitivity: 200 mV peak
Hysteresis: 100 mV
Input impedance: 3.9K? @ 60 Hz
Maximum input voltage: 40 V pk-pk, 30 Vrms
6. INPUT FREQUENCY RANGE:
Max Frequency: 25 KHz
Min Frequency: 0.01 Hz
Accuracy: ±0.01%
7. MEMORY: Nonvolatile EEPROM retains all programmable parameters and display values. TM5-250_B
3
LP0859X 10/10
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