QIRF Operation And Maintenance Manual
QIRF Operation Manual
May. 01, 2012
85050-301-000 Rev C
13
3. Function and Configuration
3.1 QIRF Working Mode
QIRF has four kinds of working mode:
•
Warm-up Mode: to heat up Optical Block and initialize components.
•
Monitoring Mode: to measure the gas concentration and output signals.
•
Zeroing Calibration Mode: QIRF is performing Zeroing Calibration.
•
Span Calibration Mode: QIRF is performing Span Calibration.
3.2 System Initialization
When the QIRF smart sensor is turned on, it initializes hardware and software. As the
transmitter is warming up, the optical block is heated to a constant temperature, the LCD
will display the transmitter is in warming-up procedure.
In warming-up procedure, the reading of the transmitter will always be zero and the
analog output will always be 4mA. M-Controller and Q4 Controller will display
“Warming up” in their LCD display panel. The time for stabilizing the optical block
temperature depends on the ambient temperature and input power voltage. The lower the
ambient temperature and input voltage are, the longer it takes. Normally, at 25
°
C and 24V
input voltage, it takes 15 minutes. The default warming-up timer is 24 hours, the
warming-up procedure can be aborted by pressing key [ESC] for 3 seconds. The
warming-up timer can be set again in [MENU]=>[System Setting]=>[Zero/Cal Timer].
If the warming-up procedure is not aborted, when timeouts, the transmitter automatically
starts zeroing calibration, then enters into monitoring mode. If there is an error, the LCD
will display the error and the TB1 pin 5/6 will output 2.5mA if the 4-20mA analog
outputs is enabled or 1.25VDC if the 2-10VDC analog outputs is enabled. An error
message will display on the M-Controller or Q4 Controller panel.
Note: After warming-up procedure, an error [PH-DIRTY] might appear which is
caused by low ambient temperature or low input power voltage. The error will
disappear when unit is fully stabilized. If not, see section 6. Troubleshooting.
Note: No adjustments or calibration should be performed within 24 hours.
3.3 Keypad
QIRF has four keys on the front panel. To access the keypad, the magnet tool in the
product-shipping package is needed.
•
Key [Up]: Scroll and Hold
•
Key [Down]: View current input or output details
