Features

RS-485 MODBUS Serial Output

4-20mA Analog Output

12-28 VDC Operation

Automated Non-Intrusive Calibration

Fully Adjustable Alarm Relay

Lower wiring costs

Liquid Crystal display with back light

Description

Ultra 1000 series is a microprocessor based addressable sensor for detection of combustible gases. The self- contained sensor features user friendly interface and menu driven calibration procedure and configuration.

The complete sensor consists of a stainless steel sensor head assembly, a user connection board and a transmitter board assembly. All of the sensor electronics are enclosed in an explosion proof instrument box. The unit’s modular design allows easy maintenance, troubleshooting and high reliability.

The unit provides a 4-20mA signal proportional to 0 to 100% of the detection range. In addition the sensor may be addressed via MODBUS RTU interface. The MODBUS output provides sensor status, alarm & fault conditions. Alarm levels can be programmed via MODBUS RTU or via magnetic switch on the face of the transmitter board assembly.

Ultra 1000 can be calibrated in less than 2 ½ minutes. The calibration and the set-up parameters are retained in a non-volatile memory.

Specifications

Sensor Type

Continuous diffusion Catalytic Bead

Measuring Range

0 to 100 % LEL

Repeatability

± 2 % Full scale

Zero Drift

< 5% per year

Response Time

50 < 10 seconds T90 < 30 seconds with 100% LEL methane gas applied

Classification

Class I, division 1, Groups B,C & D

Operating Temperature

-40°F to +158°F (-40°C to +70°C)

Operating Humidity

10% to 90% RH, non-condensing

Display

2 lines by 8 Character LC Display with back light

Mechanical Specifications

Length: 7 inches (178 mm)

Width: 5 inches (127 mm)

Height: 4.5 inches (114 mm)

Status Indicators

LC Display for gas concentration, Alarm relay status, calibration mode and sensor fault status.

Input Power

14-28 VDC. 24 VDC nominal

Power Consumption

150mA @ 24 VDC Typical

Alarm Relays

Fully programmable. 0 to Full scale range of the sensor. Latching or Non-Latching.

Relay Ratings

SPDT Form “C” type Relay contacts

5 Amps @ 250 VAC or 30 VDC

Analog Output

Linear 4-20mA (300 Ohms max. load)

2.0 mA - Calibration mode

< 1.0 mA - Sensor malfunction

Interface

RS-485 MODBUS RTU (2 wire) at 9600 Baud rate

Calibration

Non-Intrusive activated by internal magnetic switch

Cable Entry Hub