Probe Adjustment and Loop Validation

On-site probe adjustment
	The M3 transmitter features a service connector that can be accessed without disturbing the output signals. Service cable ACRLXB5 is used to connect the service connector of the M3 to the HygroPalm 3 portable indicator.
	Using the HygroPalm 3 indicator and ACRLXB5 service cable, the following can be done: a) 1-point adjustment of the HygroClip S probe against a reference probe connected to the HygroPalm b) single- or multi-point adjustment against a reference environment (requires a humidity generator). When no humidity generator is available, ROTRONIC offers easy-to-use certified humidity standards to generate known humidity values It is also possible to calibrate the HygroClip probe while removed from the transmitter. This allows a periodic rotation of the probes.
Validation of the signal loop To validate the entire measuring loop: transmitter, wiring and central processing unit, the signals of the M3 transmitter can be displayed locally with the HygroPalm 3 indicator. If so desired, the HygroClip probe can be replaced with a certified probe simulator that generates known fixed humidity and temperature values.

Probe adjustment in the metrology lab (using a HygroLab indicator)
	HW4 Software: software based probe calibration is both simple and precise: there are no hard-to-reach, hard-to-adjust potentiometers. HW4 offers a high level of flexibility in selecting the calibration reference, giving the user complete control over the calibration process. HW4 features the following calibration modes: Humidity: 2, 3 or 4 points Temperature: 2 points 1-point adjustment function (offset) for both humidity and temperature When adjusting humidity against a ROTRONIC humidity standard, HW4 automatically corrects the value of the standard to reflect the temperature of calibration (see note). HW4 also offers the possibility of saving and printing a probe adjustment protocol.
	ROTRONIC HygroGen: this humidity-temperature generator is primarily designed for the calibration of humidity instrumentation. It is completely self-contained, requiring no external resources except mains power, and is light enough to be portable for use on-site. Suitable for all types of humidity-temperature probes Fast equilibrium to move from one condition to another Generates an extremely stable humidity and temperature environment Smart chamber design minimizes temperature and humidity gradients Range: 5 to 50°C and 5 to 95 %RH Chamber accepts up to five probes Data loggers can be inserted in the chamber Available with different models of chamber door Stainless steel enclosure ROTRONIC HygroGen
	Certified Humidity Standards: if you do not have access to a humidity generator, the ROTRONIC humidity standards offer a reliable and convenient way to generate a reference humidity condition during probe calibration. The ROTRONIC standards are shipped with an internationally accepted certificate, meeting in full the requirements of quality systems such as ISO 9000. The standards are available in boxes of 5 glass ampoules of the same value, and can be stored indefinitely. Standards in the range of 5 to 95 %RH are non-saturated aqueous salt solutions. The 0 %RH humidity standard is made of small granules of a highly porous ceramic. A Material Safety Data Sheet is available for each standard. Note: the value of the standards does not depend on barometric pressure (altitude)
	ER-15 calibration device: this is a small airtight container that fits on the probe and seals around the humidity sensor. During calibration, a known reference humidity is produced inside the calibration device by means of a humidity standard.