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Clock battery
An internal clock battery is mounted on one of the instrument's printed circuit boards. This
long-life battery keeps settings in memory from being lost whenever the Li-ion battery or
alkaline batteries are removed. This backup battery should last approximately five years and
must be replaced by an authorized Honeywell service technician. It is not user-replaceable.
To reduce the risk of ignition of hazardous atmospheres, recharge battery only in area
known to be non-hazardous. Remove and replace battery only in an area known to be
non-hazardous.
Data protection while power is off
When the instrument is turned off, all the current real-time data including last measured values
are erased. However, the datalog data is preserved in non-volatile memory. Even if the battery is
disconnected, the datalog data will not be lost.
Alkaline battery pack
An alkaline battery pack is supplied with each instrument. The pack (part number 059-3052-
000) accepts four AA alkaline batteries (use only Duracell MN1500).
Do not mix old and new batteries or different type batteries.
Handheld PID Monitors
WARNING
20
User Manual
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