MSA Chillgard RT - Figure 4-3 B. Zero Calibration Continued

4-7
4-7
N
OTE: The span gas must be appropriate for monitor calibration.
For many applications, a span gas cylinder of the
refrigerant of interest is available from MSA. If a span gas
cylinder of the specific refrigerant is not available, MSA has
determined an appropriate synthetic span gas. See
TABLE 4-1 for calibration cylinders available from MSA. If
a synthetic span gas is used (such as pentane for
ammonia monitors or use R134a for 404a calibration),
refer to the calibration label on the inside of the monitor
door (FIGURE 4-5).
Set t
he unit to the value given on the "synthetic span" label shown
in FIGURE 4-5.
Figure 4-3b. Zero Calibration Continued