The Tachtrol 2 speed / rate monitor is a single input digital instrument designed to offer fast reponse, high-precision monitoring of speed or rates. It displays measured values in engineering units: RPM, FPM, frequency or other values.

Its period mode measurement, using an on-board microcomputer, produces response and precision not attainable using conventional industrial speed instruments, at a price that is considerably lower than comparable products on the market today.

A simple method for setting an input conversion factor makes it exceptionally easy to adjust the instrument to display engineering units from most frequency-producing sensors. You just enter the scaling factor and type of sensor, and Tachtrol is ready to run.

Features and Advantages
• Single-channel precision speed or rate monitoring.
• Period mode measuring system.
• Field adjustable mormalization.
• Five-digit auto-ranging .56" LED display; full or partial auto-ranging with leading zero suppression.
• Updates twice per second.
• Wide frequency range: 1 Hz to 30 KHz, switch selectable to low range, 0.1 Hz to 1 KHz.
• Active or passive sensor input: Accepts any pulse output device, magnetic sensor or digital sensor.
• Panel mount DIN standard housing.
• Indicates reverse direction of rotation by minus sign on display.
• Fast response.
• High precision.
• Low cost.
• Easy set-up using DIP switches.
• High precision: ± .05% of displayed value.
• Rugged: designed to meet MIL-810C shock and vibration.
• Operating temperature range 0-50° C.

Applications
Monitoring speed of:
• Compressors
• Conveyors
• Printing presses
• Paper machines
• Electronic motors
• Pipeline pumps
• Marine engines and shafts
• Rolling mill drives
• Packaging lines
• Flow transducers
• Variable speed drives

Specifications
Signal Input
Type: Switch selectable for AC balanced differential input (passive sensors) or TTL compatible for use with bidirectional pickups. A TTL logic (on the direction terminal 3) produces a negative speed indication.

AC Input ( sine wave):
Input Impedance =2K ohms
Sensitivity @ 1KHz =200 mVrms
Max. Voltage Input =25 Vrms
CMRR =>40 db @ 1KHz, ref. to input amplifier threshold.

Pulse Input (TTL compatible):
Input Impedance =2K ohms
Min. Pulse Width =10 µs (30 KHz range) or 200 µs (1 KHz range)
Logic 0 =V in < .5V
Logic 1 =V in >1.5V
(+12 VDC @ 50mA supplied for powered sensors)

Frequency Response: Switch selectable in two (2 ) ranges. 1 Hz - 30 KHz or .1 Hz to 1 KHz.

Power Supply
120 Vac ±10%, 50-60 Hz
12 Vdc +3V, -2V.
15 watts maximum power.

Display Output
Accuracy: ± .03% typ., ± .05% maximum (% of reading)

Resolution: Five (5) digit resolution for display values from 1.0000 to 99999. Four (4) digit resolution for display values <1.000. When fixed decimal is used, fixed position will determine resolution.

Type: .56" red, seven (7) segment LED display with red filtered lens.

Response Time: For f-in > 2Hz Display response = .5 sec. + 1/f-in sec.
For .1Hz - 2Hz Display response = 1/f-in sec.

Adjustment Range: Input frequencies amy be scaled for display by an internally adjustable constant (C). The display indication is C x input frequency. C amy be set from 1.000 x 10^-7 to 9.999 x 10^+7.

Environmental
Temperature: 0°C to 50°C operating,
-40°C to 80°C storage

Vibration: Designed to meet MIL-810C, method 514.2, Procedure VII, and Figure 514.2-6. Curve V (1.5 g's 10-200 HZ)

Shock: Designed to meet MIL-810C, method 516.2, Procedure I, Figure 516.2-2 for ground equipment (30 g's half sine).

Enclosures: Panel mount 1/2 DIN case standard. Optional enclosures designed to meet NEMA 4 and NEMA 4X. Hazardous location enclosure meets NFPA / NEC, Class I - groups B, C, D; Class II - groups E, F & G, UL standard 886 and CSA standard C22.2 No. 30 1970.

Humidity: 90% relative and non-condensing.

Electrical References: Circuit common is isolated from AC power, AC ground and case. DC Power is referenced to circuit common. Passive (AC) signal inputs are balanced. Active sensors require terminal two (2) connection to terminal five (5). This references the active sensor to circuit common.