WM281/291 User’s Manual
Michell Instruments
7
INstallatIoN
2.7
Interchangeable Sensor Module
The WM281/291 Transmitters are equipped with the interchangeable, Hygrosmart I7000
sensor module. The ‘plug-in’ type connection allows for a rapid, low-cost replacement
operation, and significantly reduces maintenance costs.
The labels of all I7000 sensor modules include:
•
the serial number
•
the date of calibration
2.8
Calibration Reference Equipment
The following calilbrators are available for the WM281/291 Transmitters:
•
503 - Humidity calibrator - for calibration checking purposes
•
S904 - Humidity calibrator - for calibration purposes
•
Optical cooled mirror calibrator - for laboratory calibration purposes
2.9
Certificate of Conformity
The WM281/291 Transmitters are delivered with a Certificate of Conformity and a
calibration report for each individual transmitter.