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.

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 KΩ pull-up to +12 VDC, I max = 1.9 mA

Current Sourcing: Internal 3.9 KΩ pull-down, 8 mA max. @30 VDC max.

MAGNETIC PICK-UP:

Sensitivity: 200 mV peak

Hysteresis: 100 mV

Input impedance: 3.9KΩ @ 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.