ENMET EX-5000 - Manual (Page 7)

Catalytic S/T ENMET Corporation
5
Figure 3: Catalytic Combustible Gas Sensor/Transmitter
1. Apply the calibration gas associated with the S/T to the sensor. See to Figure 3.
2. Allow the gas to flow 3 minutes.
3. Use the magnet to adjust the span potentiometer up or down, until the display reads the calibration gas value.
4. Remove the calibration gas.
5. In clean air, adjust the zero point if necessary, using the magnet to adjust the zero potentiometer.
6. If the zero point adjustment is large, greater than 10% LEL, apply the calibration gas again, and make a second
span adjustment.
7. Calibration is complete.
2.3 Standard Range and Alarm LED
The standard range is 0-100%LEL of the combustible gas being monitored, with 100%LEL producing 20mA in the
loop. The red alarm LED is set to turn on at the high alarm level of the gas. The high alarm level and particular gas
are indicated above the LED.
Red ‘Alarm’ LED
Zero +
Zero
––
Span
––
Span +
Calibration Cover 03620-012
use with sensor 03070-001
Calibration Cover 03620-015
use with sensor 03070-003
Fitting to
calibration cover
Regulator
Gas Cylinder