Honeywell Enraf VITO Instruction Manual page 9

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The 764 and 766 VITO temperature probes have 16 elements. These elements are thermocouples, and at the
cold junction a highly accurate Pt100 resistor is located to measure the absolute temperature.
The 767 and 768 VITO LT temperature probes are similar to the 764 and 766 temperature probes, but only have
9 elements.
An MRT (Multiple Resistance Thermometer) or Variable Length Thermometer comprises a number of resistance
elements of different lengths, all starting close to the bottom end of the temperature probe.
An MPT probe (Multiple Pt100 spots) consisting of 1 through 14 RTD's with 2 common ground wires.
More information about the different temperature probes can be found in the introduction section of chapters 2, 3
and 4.
The Honeywell Enraf level gauge must be equipped with a suitable option board to receive the signal from the
762 VITO Interface:
• HCU option board
• ICU_HPI option board
• FII-VT board
This instruction manual describes the commissioning settings in conjunction with the Honeywell Enraf 854 servo
level gauges, the 877 Field Display & Interface and the 97x SmartRadar level gauges. The commissioning of the
different type of probes is divided over the following chapters:
• Average temperature with VITO (combi) probes:
• Average temperature with MRT:
• Average temperature with MPT or 2 – 3 spots:
• Water bottom measurement:
Refer to the Commissioning manual SmartRadar FlexLine for the average temperature commissioning and water
bottom settings with the 990 SmartRadar FlexLine.
Instruction manual VITO
Introduction VITO Interface and average temperature probes
for Honeywell Enraf 854 servo level gauges and 877 FDI;
for Honeywell Enraf 97x SmartRadar level gauges
for Honeywell Enraf 990 SmartRadar FlexLine
chapter 2
chapter 3
chapter 4
chapter 5
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