RKI Instruments 65-2516RK - Manual (Page 11)

65-2516RK Oxygen Transmitter • 7
Start Up
This section describes procedures to start up the oxygen transmitter and place the
transmitter into normal operation.
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the power wiring to the controller is correct and secure. Refer to the
controller operator’s manual.
3. Turn on or plug in the incoming power to the controller, then turn on the controller.
4. Verify that the controller is on and operating properly. Refer to the controller
operator’s manual.
CAUTION: Allow the transmitter to warm up for 5 minutes before you continue with the next
section, “Setting the Fresh Air Signal”.
Setting the Fresh Air Signal
WARNING: Do not remove the detector housing cap or junction box cover while the
circuits are energized unless the area is determined to be non-hazardous.
Keep the detector housing cap and junction box cover tightly closed during
operation.
NOTE: If you can verify that the detector is in a fresh air environment (environment
known to be of normal oxygen content and free of toxic and combustible gases),
it is not necessary to apply zero air when verifying or setting the fresh air
reading.
The procedure below describes applying zero emission air, usually called zero air, using a
calibration kit that includes a calibration cup, calibration gas, sample tubing, and a fixed
flow regulator with an on/off knob. RKI Instruments, Inc. recommends using a 0.5 LPM
(liters per minute) fixed flow regulator.
1. Verify that the transmitter area is non-hazardous.
2. Unscrew and remove the junction box cover from the junction box.
3. Set a voltmeter to measure in the millivolt (mV) range.
4. Plug the voltmeter leads into the test points on the amplifier. Plug the positive lead
into the test point labeled TP+; plug the negative lead into the test point labeled TP-.
5. Screw the calibration cup onto the bottom of the detector.
6. Screw the regulator into the zero air calibration cylinder.
7. Use the sample tubing to connect the regulator to the calibration cup.
8. Turn the regulator’s on/off knob counterclockwise to open it. Gas will begin to flow.
9. Allow the gas to flow for 2 minutes.
10. Verify a voltmeter reading of 434 mV (±2 mV).
11. If necessary, use a flat-blade screwdriver to adjust the span pot until the voltmeter
reading is 434 mV (±2 mV).