the calibration tubing length to some length where the end of the tubing to the gas
canister is still accessible or increase the calibration gas flow rate between the calibration
gas cylinder and sensor.
Refer to
for an example of the sensor separation. For tubing lengths less than 10
ft. (3 m), use a 0.5 LPM regulator, and for lengths greater than 10 ft. (3 m) use a 1.0 LPM
regulator. On initial install, always confirm readings directly at the transmitter by applying
a known gas concentration to the sensor and compare the output from the transmitter.
Readings should be accurate to the gas concentration applied, taking into account the
sensor accuracy specifications in
Figure 2-1: Sensor Separation Example
A. Controller
B. Apply calibration gas.
C. Tubing for calibration gas
D. Sensor
E. Calibration cup
F. Conduit
G. Junction box
H. Approximately knee level
2.4
Mounting
Prior to mounting the sensor to the transmitter or junction box enclosure apply suitable
grease (jet lube, etc.) to the threading of the
¾
-in. female national pipe thread (FNPT)
conduit entry of the enclosure as well as the threading on the sensor
¾
-in. male national
pipe thread (MNPT) fitting. This aids in protecting the enclosures from water. After
Install
Reference Manual
November 2020
00809-0100-4303
10
Emerson.com/FlameGasDetection
