Chapter 1. The Kaye Validator AVS
Kaye Validator AVS User’s Manual 7
1.4.2 Sensor Input Modules (SIMs)
The Validator AVS uses Sensor Input Modules to provide secure connection of sensors to
the Validator AVS while protecting the electronics from draft, dust, humidity, electrical
noise and mechanical shock. SIMs are designed to be wired once and used repeatedly.
You can wire SIMs yourself, or buy pre-wired SIMs to reduce preparation time. Once the
SIMs are wired, you can calibrate multiple harnesses at the same time and store them for
later use.
Figure 3: Sensor Input Module
The Validator AVS can be configured for up to 4 SIMs. Each SIM has:
• Sensor inputs: TC-SIMs have 12 sensor input connections, RTD SIMs can connect 6
RTD sensors, 4-20mA SIMs can connect 12 sensors and one connection for an
external power supply
• A memory chip to store calibration offsets, SIM serial number, slot location, and the
serial number of the Validator AVS measurement board where calibration was
performed
• A cold junction reference RTD to maintain measurement accuracy in different
environmental conditions
Using 4 SIMs, you can attach up to 48 inputs in any combination of thermocouples,
voltage, or current inputs. A dedicated 4-20 mA SIM is also available with 12 4-20 mA
inputs and one connection for an external power supply.
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