• History files date stamp (see Section 3.4.2)
• Delays of all alarm conditions (see Section 3.2.1)
• Semimonthly, automatic sensor tests (see Section 3.5)
2.3.4.3 Non Volatile Memory
The nonvolatile memory allows the Hydran M2-X to retain its data even during
the following events:
• Disconnection of the Hydran M2-X’s battery.
• Failure of the ac power supply.
• Update of the Hydran M2-X’s embedded software.
The Hydran M2-X’s nonvolatile memory is used to retain the following data:
• Setup > Temperature Setup
• Service > Sensor Param
• View Readings > View History > View Sensor Card History
2.4 Hydran M2-X Sensor
Never touch the gas detector or moisture sensor inside the
Hydran M2-X sensor. Touching them may damage the
Hydran M2-X sensor and void the warranty.
2.4.1 Overview
The Hydran M2-X sensor is composed of a permeable-membrane gas detector
and a thin-film capacitive humidity sensor.
The Hydran M2-X sensor (see Figure 2-7) is made of brass. It consists of the
following parts:
Figure 2-7: Parts of the Hydran M2-X Sensor
1. O-ring: To assure the water tightness of the enclosure.
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