You can find out more about the applications for the Tracker 280 by visiting our applications section or download related documentation from the area to the right. If you need additional advice, then contact us with no obligation to discuss your requirements further.

Dual Input Channel Digital Panel Meter for Pulse, TTL, AC, Contact Closure and Encoder Signals

Data Track has designed the Tracker 280 digital panel meter for demanding industrial applications that use sensors with AC or pulse outputs. The Tracker 280 is suitable for use as a frequency panel meter, pulse meter, counter / timer and flow rate indicator. The digital panel meter is also suitable for other measurement and display only applications or can act as a transmitter using its analogue output.

You can use the alarm option on the Tracker 280 panel meter as an alarm trip or batch controller. The unit is fitted with a serial communication interface as standard allowing it to be used as a front-end device for PC-based systems. The combination of the dual inputs together with the power and flexibility of the software, allows customers and distributors to reduce stock and spares inventory to a minimum. The Tracker 280 panel meters are styled to match other panel meters in the Tracker 200 range.

You can directly connect the Tracker 280 panel meter to most popular process sensors including AC magnetic pickups and pulse output devices. You can scale all the input types to display values in your preferred engineering units. You are able to use the internal crystal controlled clock or calibrate to a known external standard. We provide transducer excitation as standard, giving 5 or 12V DC. An 8-point user linearisation feature can be used to compensate for non-linear sensor outputs in frequency and timer applications.

Encoder measurement offers bi-directional pulse counting. A further 4 times resolution is available when used in Quadrature Mode. You can use the Tracker 280 panel meter in conjunction with:

• Rotary Encoders
• Optical Encoders
• Linear Encoders
• Incremental Encoders
• Transducer Excitation Supplies

We fit 5V and 12V DC supplies as standard to power most sensor types.

Serial Communications

Data Track supply the Tracker 280 series of panel meters with RS422/485 2 or 4-wire serial communications as standard. This interface allows computer-based systems to read values (e.g. the measured value) and write values (e.g. alarm setpoints) to and from the instrument. The Tracker 280 has 3 protocols including the widely used MODBUS-RTU.

Alarm and Batching Control Outputs (T284 & T285)

The Tracker 284 panel meter is fitted with two relay outputs and the Tracker 285 panel meter has four TTL outputs. Setpoints can be adjusted at the time of configuration and can be password protected or adjusted using the buttons on the front panel. Each alarm can be used in High, Low or Deviation mode. Outputs can be configured to give a pulse for a user selectable time period, and can be latching with independent delay times for both on and off conditions. In addition they can be set to be energised or de-energised when in the alarm condition or when a batch (count) value is reached.

Analogue Output

The Tracker 280 can transmit a measured value as a 0 to 10 volt, 0 to 20mA or 4 to 20mA signal to an other device such as a chart recorder or data logger. The fully isolated output can be scaled for any portion of the display range e.g. 4 to 20 mA = 500.00 to 800.00 (Litres/m). The analogue output can be configured to re-transmit rate, time or totalised (6 LSD) values.

Input Functions

• Allows the input signal to be inverted.
• Allows the input count, frequency or time to be converted into engineering units.
• Scale and Linearise also allows an eight-point user linearisation to be applied to compensate for non-linear sensor output signal rates, e.g. turbine flow meters.
• Pre-Scaler for totalising values. This allows the totalled values to be in different engineering units, or at a different resolution, from the real-time measured value.
• Low frequency cut off allows low input frequencies to be regarded as zero (user adjustable).

Universal Power Input

Wide ranging 90–265V AC input allows world-wide installation.

Download the related product documentation using the links at the top of this page or contact us without obligation to discuss your requirements further.