RKI Instruments GD-K11D - Manual (Page 15)

Model GD-K11D Operator’s Manual Start Up • 11
Start Up
This section describes procedures to start up the Model GD-K11D and place the Model
GD-K11D into normal operation.
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the power wiring is correct and secure (see the “Installation” section on
page 8.)
3. Turn on or plug in the incoming power at the power source end, then place the Model
GD-K11D’s power switch in the ON position.
4. Verify that the PW/TR (power) light is on.
5. Verify that the flowmeter ball is between the two lines on the flowmeter. If necessary,
use the flow adjust valve to adjust the flow rate to the sensor, so the flowmeter ball is
between the two lines.
6. Verify that the incoming sample line is not leaking. To test the sample line, plug the
open end of the sample line with your thumb. If the flowmeter ball drops to the
bottom of the flowmeter, the incoming sample line is not leaking.
CAUTION: Allow the Model GD-K11D to warm up for 30 minutes (2 hours for ammonia
transmitters) before you continue with the next section. If the sensor keeper batteries
are dead and the Model GD-K11D has been off power for an extended period of time,
allow the Model GD-K11D to warm up overnight.
Setting the Zero Reading
CAUTION: If you suspect the presence of toxic gas in the monitoring environment, use the
calibration kit and the zero air calibration cylinder to introduce “fresh air” to the
sensor and verify an accurate zero setting.
1. Verify that the Model GD-K11D is in a fresh air environment (environment known to
be free of toxic gas.)
2. Press and hold down the MODE button until 1. appears on the display screen
(approximately 3 seconds).
The SKIP light flashes.
3. Press the ∆ button twice to display 3.
4. Press the SET button.
The ZERO light flashes, and the gas reading appears on the display screen. The Model
GD-K11D is prepared to adjust the zero reading.
5. Use the ZERO potentiometer to adjust the display reading to zero.