Emerson Net Safety Millennium II SC310, Manual

Page: 23 / 40

Procedure
1. Confirm successful power up of Transmitter, (green blip/blink of status LED every
second: no fault indicated).
2. Bypass any output alarms (recommended).
3. For analog model connect a standard current meter to the transmitter’s Test Jacks
(not required but gives visual confirmation).
4. Press and hold the “ push button ” (or activate the “ Reed switch ” using the magnet)
for at least 15 seconds, the status LED flashes green fast, and then goes solid green
(first solid green).
Keep holding “
push button ” or magnet, after which, status LED goes solid red.
When this occurs, release “ push button ” or remove magnet.
5. When the current output is 3 mA (indicated by analog models) and the Status LED is
once again solid green (second solid green), apply zero gas (clean air).
Recommendation: Flow ZERO AIR at a rate of 0.5 liter per minute or more to the
sensor.
6. When the current output is 3.3 mA (indicated by analog models) and the Status LED
is flashing red, apply specific calibration gas (50% of full span).
Recommendation: Flow span gas at a rate of 0.5 liter per minute to the sensor for
direct sensor calibrations. If sensor is remotely mounted and long tubing run is
used, increase gas flow rate (e.g.1.0 liter per minute) to ensure tubing length does
not affect calibration results.
7. When the current output is 3.6 mA (indicated by analog models) and the Status LED
is solid green, remove the gas.
8. Apply zero gas (clean air) again to purge the system.
9. After the sensor is purged of gas, the detector will return to normal operation.
Note
When calibrating with the Millennium II Basic Transmitter always use 50% span gas
(half the scale). Calibration gas
MUST be air balanced for SC310 sensors. Calibration
instructions are also accessed using the HART
®
Communicator with the Analog/
HART model transmitter. For HART Menu Structure/Tree, see Millennium II Basic
Transmitter manual .
Zero calibration option
This option is useful if the sensor’s zero point has drifted as a result of a change in the
ambient conditions.
The Zero calibration option is selected if a sensor is only being zeroed (this not a complete
calibration).
The application of span gas is not required, as only the sensor’s zero point is adjusted.
Ensure that no contaminants are present, if the surrounding air is to be used for Zeroing. If
Zero calibration is needed, at
Step 4 above, hold the push button or activate Reed switch
(for 6-9 seconds) using the magnet, until the status LED goes solid green, and then release
the switch. Zero calibration will begin immediately.
Safety Manual Maintaining
00809-0100-4310 May 2021
Net Safety SC310 23