Introduction - Honeywell 854 ATG Series Instruction Manual

1

Introduction

The Honeywell Enraf 854 ATG (Advanced Technology Gauge) measures the liquid level and can be
programmed to measure two additional interface levels.
The 854 ATG has four programmable level alarms, and also provides diagnostic information. This information
can be displayed on the internal display, the Portable Enraf Terminal (PET) as well as on remote systems.
Optionally, the instrument can be provided with software for density measurement of the stored product.
The 854 ATG can be supplied with an optional board (called: HCU board) to interface optional equipment as:
• Spot temperature element (Pt100 RTD)
• Average temperature element (VITO MTT/LT temperature probe, MRT element, MPT element)
• Water bottom probe (VITO water probe, VITO combi probe or external HART water probe)
• Pressure transmitters (for vapour pressure measurement, HIMS density measurement)
• Analog 4-20 mA level output
The above functions are separately available or in combinations as with the previous MPU, HPU, HSU and
TPU optional boards. Refer to the below table:
Sales code
option board
th
(4 position)
B
C
J
U
V
W
X
Y
Notes:
1 HART device(s) can be:
• HART pressure transmitters for vapour pressure measurement or HIMS density measurement
• HART water bottom probes.
2 With sales code Y (all HCU functions), the spot temperature measurement
is disabled if a VITO temperature probe is present.
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Available functions
HCU board
Spot temperature Pt100 RTD
VITO temperature and/or water probe
VITO temperature and/or water probe + HART device(s)
Spot temperature Pt100 RTD + HART device(s)
Analog level output
Analog level output + VITO temperature and/or water
probe
Analog level output + VITO temperature probe
Analog level output + Spot temperature Pt100 RTD +
VITO temperature and/or water probe + HART device(s)
Introduction
Emulation
mode
TPU-2/ HSU
HPU
HPU
HSU
MPU
HCU
MPU
HCU