Replacing components, Replacing the detector, Replacing the fuse – RKI Instruments RI-215A User Manual
Page 21
RI-215A
Operator’s Manual
Replacing Components • 21
Replacing Components
The section includes procedures to replace the sensor and fuse.
Replacing the Detector
The CO
2
gas detector inside the RI-215A is a factory replacement part. Should you
determine that the RI-215A’s gas detector is no longer working or is working improperly,
you will need to ship the RI-215A to RKI Instruments, Inc. to have the detector replaced.
Replacing the Fuse
1. Turn off the power to the RI-215A.
2. Remove the base plate of the RI-215A.
•
Using a small screw driver, press down on the small tab on top of the
•
Model RI-215A.
•
While pushing down on the tab, gently move the base plate away from the front
housing of the RI-215A.
CAUTION: Be very careful not to pull on the cable assembly connected to the RI-215A’s internal
printed circuit board when removing the base plate. Pulling on the cable assembly
may damage the printed circuit board.
•
Completely separate the base plate from the front housing.
3. Find the fuse on the left side of the printed circuit board. Carefully remove the fuse
from the bracketing holding it on the printed circuit board.
4. Insert a new fuse in the brackets. The replacement fuse must be 0. 5A, 125 V or 250 V
(5 mm x 20 mm).
5. Reassemble the base plate and the front housing of the RI-215A in the reverse order as
described in step 2 above. Line up the bottom of the base plate with the front housing,
then carefully snap the base plate and front housing together.
6. Turn the power back on to the RI-215A.
•
The LCD shows
abnormally high or low
CO
2
readings but other
gas detection instru-
ments show a normal
level of CO
2.
•
The RI-215A may
need to be
recalibrated.
1.
Recalibrate the unit.
•
Unable to zero or span
reading during
calibration.
•
The calibration
cylinder is low,
outdated, or defective.
1.
Verify that the calibration cylinder
contains an adequate supply of sample.
2.
If difficulties continue, contact RKI.
Table 3: Troubleshooting the RI-215A
Symptoms
Probable Causes
Recommended Action