CD-1300-ST
ENMET
Manual Revision Date – June 15, 2017
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7
Manual Part No. – 80003-134
4.2 Altitude Correction
The
CD-1300-ST series
is factory-calibrated for operation at sea level. When operated at higher elevations, the calibration must
be adjusted by the amount shown in the altitude correction table to the right.
Table 1: Altitude Correction
Altitude [ft]
Multiplication
Factor
0
1.0
500
1.02
1000
1.03
1500
1.05
2000
1.07
2500
1.08
3000
1.10
3500
1.12
4000
1.14
4500
1.16
5000
1.18
4.2.1 Altitude Correction Procedure
To adjust the calibration of a unit currently calibrated for sea level operation to a new altitude proceed as follows:
1.
Let the CD-1300-ST Series stabilize to the ambient CO
2
concentration, and record the reading in ppm.
2.
Multiply the reading by the scale factor corresponding to the operating altitude in the altitude correction table. For
instance if the unit is operating at an altitude of 4000 ft, the scale factor from the table is 1.14. If the concentration reads
420 ppm, multiply 420 times 1.14 giving 478 ppm. Adjust the display to read 480.
3.
Remove the CD-1300-ST Series’ cover (see cover removal procedure on
Section 3.1
).
N
OTE
: whether the shorting block at jumper JP5 is covering both pins or only a single pin, then borrow the shorting block and
slide it over the two pins of jumper JP2 (see Figure 2 Section 3.3). Use the 'UP' and 'DOWN' buttons to change the
concentration to the value just calculated.
4.
Remove the shorting block from jumper JP2 and return it to its previous position over one or both pins of jumper JP5.
5.
Replace the cover (see procedure on Section 3.4.1).
