All HDD12 transmitters are delivere

All HDD12 transmitters are delivered with a traceable calibration certificate for both the humidity measurement itself and the current outputs used. In addition, the transmitters can be easily checked on-site using a HMD70 handheld meter with minimal disruption to normal operations. The HMD70 connects to a digital service port on the transmitter circuit board and the transmitter reading can easily be compared to the calibrated reference probe on the HMD70. The need for laboratory calibrations can be significantly reduced if standard operating procedures are defined. This way only transmitters that deviate from a preset limit defined in the handheld reference instrument need to be sent for calibration. It is also possible to adjust the measurement with the HM70. This is a good option if the measured conditions vary only slightly around a standard value. The display unit does not require calibration as the data is transmitted digitally between the sensor and the display. The transmitters are interchangeable and use a generic communication format that allows the swapping of sensors without any configuration or setup, for example if some transmitters need to be sent offsite for calibration or service.