The new OMEGA™ mini infrared pyrometer is packed full of exciting new features. Its miniature sensing head measures just 18 x 45 mm (0.71 x 1.8"), making it ideal for mounting in tight spaces. A high ambient version is capable of withstanding temperatures of up to 180°C (356°F) without water or aircooling, allowing significant energy and cost savings to be made. Manufactured from 316 stainless steel and sealed to IP65, the Omega mini sensing head is ideal for food and pharmaceutical applications among many others. A wide selection of optics allows the Omega mini to focus on small or large targets at short or long distances. The special low-noise interconnecting cable is resistant to interference from movement, making the sensing head ideal for mounting on robot arms. It can be supplied in lengths from 1 to 30 m (3.3 x 98'). The electronics module is also available with a number of different options: The backlit touch screen interface provides a large, bright display of the measured temperature in digital format and a graph view that shows the history of the measured temperature. It also enables full configuration ofthe sensor including temperature range setting between -20 to 1000°C (-4 to 1832°F), adjustable filtering, peak or valley hold processing, emissivity setting and reflected energy compensation. In alarm conditions, the whole display changes color to provide an immediate and obvious alarm indication. Alarm modes and levels can be configured via the touch screen. When fitted with a MicroSD card, the Omega mini also functions as a data logger, providing a useful means of recording process temperatures for quality assurance and traceability. The user can select the sample rate and the number of samples to be taken and schedule the data logging to start at a certain time. With a 2 GB card, the user can store 28.4 million time and date stamped readings, which provides almost 1 year’s worth of data at the fastest possible sample rate of 1 per second. Output options include 4 to 20 mA, RS485 Modbus and alarm relays, which are rated 24 Vdc so there is no need for a separate trip amplifier. Other options include mounting brackets, an air purge collar, protective lens cover and laser sighting tool.
Touch Screen Specifications Touch Screen Display Format: 72 mm (2.83") resistive touch TFT, 320 x 240 pixels, backlit Configurable Parameters: Temperature range, temperature units, emissivity setting, reflected energy compensation, alarms, signal processing, Modbus address (C4-R-D models), date and time, data logging Temperature Units: °C or °F configurable Temperature Resolution: 0.1° Alarm Configuration: Two alarms with adjustable level, individually configurable as HI or LO; alarm 2 can be set to target temperature or sensing head internal temperature Signal Processing: Average, peak hold, valley hold, minimum, maximum
Specifications Maximum Temperature Span (MA-R-D Models): 1020°C (1868°F) Minimum Temperature Span (MA-R-D Models): 100°C (212°F) Output: 4 to 20 mA or RS485 Modbus Accuracy: ± 1°C or 1%, whichever is greater Repeatability: ± 0.5°C or 0.5%, whichever is greater Emissivity Setting Range: 0.20 to 1.00 Emissivity Setting Method: MA Models: Via two rotary switches in electronics box C4 and C4-R-D Models: Via RS485 MA-R-D and C4-R-D Models: Via touch screen Response Time, t90: 240 ms (90% response) Spectral Range: 8 to 14 µm Supply Voltage: 24 Vdc ± 5% Maximum Current Draw: 100 mA Maximum Loop Impedance (MA and MA-R-D Models): 900 O (4 to 20 mA output) Alarm Relays (MA-R-D and CR-R-D Models): 2 x single pole changeover alarm relays rated 24 Vdc, 1 A, isolated 500 Vdc Cable Length (Sensing Head to Electronics Module): 1 m (3.3') (standard), up to 30 m (98.4') (optional) Weight with 1 m (3.3') Cable: Approximately 390 g (14 oz) Cable Connections: Removable screw terminal blocks (see connections diagram to right) Conductor Size: 28 to 18 AWG Output Cable Gland: Suitable for cable diameters 3.0 to 6.5 mm Sensing Head: 316 stainless steel (see diagram on previous page) Dimensions: Ø18 x 45 mm Mounting: M16 x 1 mm thread Electronics Module: Die-cast aluminum Dimensions: 98 W x 64 H x 36 mm D (3.9 x 2.5 x 1.4") Mounting: Two M4 screws for wall mounting (see diagram on previous page)
I'm wondering if the 4-20mA output is isolated so that if the PLC this would be wired to had the negative side of the loop tied to ground would it still work? An electrical drawing of the analog output circuitry would be ideal.
Asked by: GPDiver
Thank you for your interest in our Products The output is not isolated, so if the PLC input is connected to ground, there could be a ground loop if the electronics module housing and/or the sensing head metalwork are grounded. This would not cause too much of an issue provided there are no switching currents in the ground, and the ground connections are all close together. We do not have an Electrical drawing of the analog output circuitry .