ENMET IR-6000 - Manual (Page 8)

IR-6000 Hydrocarbon Sensor/Transmitter ENMET Corporation
6
6.0 Zero Calibration
N OTE : Unlike most gas detector transmitters an IR transmitter only requires that a zero calibration be preformed. Application
of a target gas is a performance “check” only.
6.1 Clean Environment
The IR-6000 is factory zeroed and spanned. Unlike catalytic sensors, the IR-6000 typically does not require routine field span
gas calibration to ensure proper operation.
In a relatively clean environment, zero and performance check should done once every 6 months. To check the performance,
expose the
IR-6000 to a known level of the target gas and verify that the reading is adequately close to the known level.
6.2 Dirty or Dusty Environment
When the application is a dirty dusty environment, the IR-6000 should be checked more frequently.
The IR-6000 can be calibrated for almost any hydrocarbon using a calibration gas of the hydrocarbon that is to be detected
(target gas). The IR-6000 is required to be spanned with gas only one time with the target gas. Typically, this is done at the
factory, but it is possible to field span the device by connecting the IR-6000 to a computer and using the software package
option. Contact ENMET for availability.
6.3 Normal Calibration
It is recommended that a cylinder of “clean air” be used to reform the zero calibration. Cylinder 20.9 air is ENMET part
number 03296-209. If the sensor is located in an area that is known to be free of the hydrocarbon gases then ambient air can be
used as a zero reference.
If a cylinder is used for the zero calibration, there is a calibration port on the bottom of the sensor for a 1/8” ID tubing
connection.
If the Monitor is reading slightly up scale and it is known that no combustible gas is in the area, the IR-6000 can be zeroed by
touching the white wire to the black wire for 10 seconds.
7.0 Specifications
Detection Method Diffusion
Output (analog) 4–20 mA (Source type), max. 1000 Ohm load at 24 V DC supply voltage
Response Time T50 < 5 seconds
T90 < 10 seconds
Construction Sensor housing is nickel-plated aluminum and stainless steel.
Optional stainless steel model available.
Ingress rating IP54
Accuracy +/- 3% LEL, 0 to 50% LEL (Lower Explosive Limit)
+/- 5% LEL, 51 to 100% LEL
Operating Temperature Rating -40
°
to +70
°
C at 0 to 99% RH (non-condensing)
Operating Voltage 24 V DC , Operating range: 18 to 32 V DC measured at the detector head
Power Consumption 5 Watts Max.
Max. Current Draw(at 24 V DC ) Average: 210 mA, Peak: 400 mA
Approvals CSA, Class 1, Division 1, Groups B, C and D
N OTE : All specifications stated in this manual may change without notice.