Intrinsically Safe Piezoresistive Pressure Transmitters
Series 23 (S)Y Ei / 25 Y Ei / 26 Y Ei

For gas and dust atmospheres

These piezoresistive pressure transmitters are approved for use in highly explosion risk areas of group II (gas and dust).

The Y-line transmitters have an extremely small temperature error. This is achieved using an additional circuit containing a temperature sensor that subdivides the temperature range into fields that are 1,5 Kelvin (K) wide. The TK zero and TK compensation values are calculated for each field and programmed into the additional circuit. During operation, these values are fed into the analogue signal path depending on the temperature. Each temperature is the „calibration temperature” for this transmitter. The accuracy thereof is mainly determined by linearity. 120 fields are available, representing a possible temperature range of 180 K. The wider the temperature range, the greater the amount of testing that is needed to minimise the inaccuracy of the mathematical model.

Note:
The Series 23 (S) Ei, Series 25 (S) Ei, 26 Ei have been replaced by this Series.
The data sheet on the Series 23 (S) Ei, Series 25 (S) Ei, 26 Ei is yet available under:
Data Sheet Series 23 (S) Ei, Series 25 (S) Ei, 26 Ei