Ec Sensor Replacement Procedure; Replacement Parts - Honeywell EC-FX-NH3 Instruction And Installation Manual

threshold (5ppm) on the EC-FX output and below the first alarm level of 25 ppm
(8 mA). This could be an early warning that a small leak or breach in the NH
system could have occurred in which a constant background of NH
False alarms or brief activation of alarm 1 may also be an indicator of the
presence of background or low level NH
If it is discovered that the EC-FX was exposed to a continuous leak of NH
more than 6 hours), it is recommended to allow the sensor to stabilize in clean air
for 48 hours and re-calibrate.

EC Sensor Replacement Procedure

•
•
•
•
•
Honeywell Analytics' recommendation is to check the calibration of all new
sensors with certified calibration gas. Follow the procedure in the Calibration
section of this manual.

Replacement Parts

For replacement parts, contact Honeywell Analytics. Be sure to have the model
number and serial number of the unit.
Calibration parts:
EC-FX-CK
EC-FX-CK1
EC-FX-CK2
EC-FX-CA
Remove the old EC sensor.
Plug in new EC sensor, making sure connector pins are
positioned correctly. Be sure ribbon cable is snug under
plastic clip (see Figure 8, Note 4 on page 28).
Allow sensor to stabilize until output reaches 4 mA ±0.5
mA.
Perform manual SensorCheck
TM
SensorCheck section.
Follow the span calibration procedure on page 23.
ECFX cal kit 17/34L .300LPM reg
ECFX cal kit 29L .300LPM reg
ECFX cal kit 58/103L .300LPM reg
Calibration Adaptor for EC-FX
.
3
TM
using the procedure in the
OPERATOR MANUAL
3
is present.
3
(for
3
32