HDI 2522, User Manual

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HDI 2522 Position Indicator Gauge
IECEX/ATEX User’s Manual – HDI 2522, Rev A | November,2019
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1.C.5 Personnel Qualifications
CAUTION :
Anyone testing the equipment should have basic electrical understanding, knowledge of
circuitry, and use of a multi-meter. The customer should read the entire manual prior to opening the
display or testing. Any modifications to the HDI 2522 system will void the one year warranty and
jeopardize the IECEX certifications.
Section 2 – HDI 2522 Series Position Indicating Gauge Systems
Overview
2.A System Overview
The HDI 2522 position indicator gauge is a standalone and intrinsically safe electronic indicator gauge
system powered with the HDI field replaceable internal 3.6 Vdc power pack. This battery provides the
power to run the internal circuitry of the gauge assembly, including its display and microcontroller. The
internal battery does not provide the power to drive the 4-20 mA loop (if equipped). The indicator gauge
system requires minimal power during normal operation. The gauge is designed for continuous
operation but can be turned off by the user if desired. The gauge will retain its calibration information
even when powered down. The battery life is guaranteed for one year of continuous operation.
All HDI position indicator gauge Displays are comprised of a liquid crystal display (LCD) display that
includes both a numeric (5 digit) representation (for accuracy) and a bar-graph representation (for trend)
and low battery alarm indicator.
The 2522 gauge system will enable the user to have either a 4-20mA output signal (as an added option)
for chart recording or PLC integration or with the ability to have a slave gauge display to repeat the same
position reading at a different location. The HDI 2522 is configured to allow for a maximum of two slave
gauge displays in addition to the master.
The 2522 gauge systems are shipped as matched and calibrated systems, comprised of the gauge
head and potentiometer assembly. The potentiometer assembly is matched to the head appropriately
and both serialized. Once calibrated, are a matched set.