RKI Instruments RI-215A - Manual (Page 24)

24 • Parts List RI-215A Operator’s Manual
Appendix A: Changing the Detection Range
The RI-215A can be setup for one of three detection ranges: 0 - 2,000 ppm; 0 - 5,000 ppm; 0
- 9990- ppm. When the RI-215A is ordered, the detection range must be specified. If it is
necessary to change the detection range in the field, this can be done in Maintenance
Mode.
WARNING: The RI-215A is not an active gas monitoring device during the full scale
adjustment procedure.
Perform the following to change the detection range.
1. With the RI-215A on and in Measuring Mode, locate the function switches on the
bottom of the unit.
2. Press and hold the MODE switch (M) for 3 seconds to enter Maintenance Mode. The
display will show “1” to indicate Zero Adjustment Mode.
3. Press the Up ( ∆) switch until the display shows “3” to indicate Full Scale Adjustment
Mode.
4. Press the SET switch (S) to enter Full Scale Adjustment Mode. The display will show a
full scale value with a flashing decimal point after the first digit, for example
“2.000“.
5. Use the Up ( ∆) and Down ( ∇) switches to scroll through the full scale value choices
until the desired full scale value is displayed.
6. Press the SET switch (S) to accept the displayed full scale value. The display will again
show a “3”.
7. Press the MODE switch for 3 seconds to exit Maintenance Mode and return to
Measuring Mode.
8. Calibrate the RI-215A as described in "Calibration" on page 22.
WARNING: The RI-215 must be calibrated after the detection range is changed. The
RI-215A readings will not be accurate unless a calibration is performed.