RKI Instruments GD-K11D - Manual (Page 21)

Model GD-K11D Operator’s Manual Maintenance • 17
Maintenance
This section describes maintenance procedures for the Model GD-K11D. It includes
preventive maintenance and troubleshooting procedures.
Preventive Maintenance
This section describes a preventive maintenance schedule to ensure the optimum
performance of the Model GD-K11D. It includes daily, quarterly, and biannual
procedures.
Daily
1. Verify that the PW/TR (power) light is on. If the power light is not on, see the
troubleshooting guide in this manual.
2. 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, so the flowmeter ball is between the
two lines.
3. Verify a display reading of 0 PPM. Investigate significant changes in the reading.
Quarterly
If you are not in a sensor exchange program, set the sensor’s K number as described on
page 19, then calibrate the Model GD-K11D as described on page 21.
Biannually
If you are in a sensor exchange program, replace the sensor as described on page 18.
As required
This procedure describes a test to verify that the alarm circuit is operating properly.
NOTE: This test duplicates an alarm condition. Any external alarms wired to the Model
GD-K11D will activate during this test.
1. Loosen the thumbscrew at the top of the housing.
2. Rotate the housing cover toward the bottom of the housing to gain access to the
interior of the Model GD-K11D.
3. Press and hold down the TEST button. The TEST button is the red button on the right
side of the display panel.
The SKIP light turns on indicating that the Model GD-K11D is in alarm test mode.
4. While pressing the TEST button, press the ∆ button until the display reading is greater
than the alarm point.
After the alarm delay, the AL (alarm) light turns on and the relay contacts on the
terminal strip energize. Any external alarm devices wired to the relay contact activate
when the relays contacts energize.
5. Release the TEST button to return to measuring mode (normal operation).
The display reading decreases to the normal level, and the alarm circuit automatically
resets itself.
6. Rotate the housing cover up to its original position, then tighten the thumbscrew at
the top of the housing to secure the cover to the housing.