Option Description
2-Point Calibration Appropriate for gases with two main constituents. Requires two calibration
gases.
3-Point Calibration Appropriate for gases with three main constituents. Use only if recommended by
customer support. For more information, see Three-point calibration.
6. Select the number of the calibration that you want to perform.
a) When CAL NUMBR appears, activate Select, then scroll through the list of options.
b) When the desired option appears, activate Select, then store the selection.
The device can store up to four independent calibration ranges. All calibrations must have the same
calibration type (2-point or 3-point). Each calibration can use different calibration gases.
7. Set the low-density calibration point. See Figure 5-2.
a) Connect the lower calibration gas to the calibration gas inlet 1 (H).
b) Set the pressure regulator on the lower calibration gas tank to the appropriate sample pressure
for your installation.
Note
Make sure the process gas inlet valve (D) is closed.
c) Set the gas selector valve (A) to the calibration gas inlet 1 position and open the outlet valve (C).
d) Set the process/calibration selector valve (B) to the calibration position.
e) Activate SCROLL until ENTER GAS LOW appears, then activate SELECT.
f) Enter the specific gravity, molecular weight, or relative density of the calibration gas that is
flowing through the system and store the value by activating both SCROLL and SELECT at same
time until the previous menu appears.
g) Activate SCROLL.
h) When CAL GAS LOW appears, activate Select to start the calibration.
i) During the calibration, activate SCROLL to observe the Sensor Time Period and Stability values
during the calibration.
j) Wait between 3 to 15 minutes for the system to stabilize. When Stability is Good, activate
Select.
If measurement does not stabilize after 30 minutes, activate SCROLL to abort the calibration.
k) Activate Select again to accept the calibration value.
l) As the gas flows, select the Start button and observe the Sensor Time Period and Stability
values.
8. Set the high-density calibration point.
a) Connect the higher calibration gas to the calibration gas 2 inlet (I).
b) Set the pressure regulator on the higher calibration gas to the appropriate sample pressure for
your installation.
Configuration and Use Manual Purging and calibration
MMI-20020954 March 2021
Configuration and Use Manual 35
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