IOtech MultiScan 1200, User Manual

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TempScan / MultiScan User's Manual Chapter 14: System Calibration 225
System Calibration 14
Introduction……225
Calibration Setup……225
Calibration Properties……225
Calibration Protection……226
Calibration Status……226
Calibration Password……227
Calibration of Master Chassis……228
Calibration of Scanning Cards……230
Calibration of Thermocouple Scanning Cards……232
Calibration of Voltage Scanning Cards……236
Calibration of RTD Scanning Cards……237
Introduction
Prior to shipment, each TempScan/1100, MultiScan/1200, Exp/10A, and Exp/11A unit, as well as each
TempScan/1100 and MultiScan/1200 scanning card, is calibrated. Depending on your operating
guidelines, your equipment will require periodic calibration to ensure accuracy at all times. The
industry standard for this calibration is once every six months.
Calibration can be performed via the traditional manual method or via a software-automated method.
Manual calibration is supported by operating in
Calibration Mode , in which a specific set of commands
is provided. Meanwhile, software-automated calibration is provided by using ScanCal, which is
included with the installation of TempView.
Note:
Using ScanCal is not essential. But if you have access to a PC with Windows 3.X or
Windows 95, we strongly suggest using this application. See chapter
ScanCal .
The following text discusses the traditional manual method of calibration. For more information on
the software-automated method of calibration using ScanCal, see chapter ScanCal .
Calibration Setup
Calibration Properties
For proper results, the TempScan/1100 or MultiScan/1200 master chassis and each scanning card must
be calibrated separately. The master chassis contains an on-board battery-backed-up NV-RAM (Non-
Volatile Random-Access Memory) and each card contains an on-board EEPROM (Electronically
Erasable Programmable Read-Only Memory) for saving calibration constants, allowing for card-
swapping within a system, card-swapping between systems, as well as system expansion. Calibration
relates to the master chassis and scanning cards as follows:
* Master Chassis: Calibrated for channel offset and channel gain only.
* Option Cards: Calibrated for channel offset, channel gain, and cold junction sensor offset (if
thermocouples are used).