User manual VAISALA HMP130Y

[. . . ] INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1. 1 HMI41 with calibration option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1. 2 Selecting the HMI41 calibrator function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OUTPUT SCALE SELECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Acknowledge the setting with ENTER and turn the HMI41 off with the ON/OFF button. You can now calibrate the transmitter (see Chapter 3). 2. 3. 2 Current output selection mode (I) NOTE When calibrating the transmitters with current outputs, make sure that the output loop is terminated. If the transmitter has current outputs, its temperature range is given to the HMI41 with the current output selection mode (I). Select the I selection mode with buttons v or w and acknowledge the selection with ENTER. A text similar to the following is displayed: set Numbers on the display are blinking, and you can now select the output (0. . . 20 or 4. . . 20 mA) with buttons v or w according to the transmitter to be calibrated. Acknowledge the selection with ENTER and a text similar to the following is displayed: 1996-08-29 5 HMI41 Calibration Option Operating Manual 19116ZZ-U218en-1. 1 T T set °C °C Lo Numbers on the second line are blinking. They indicate the lower limit of the transmitter's temperature range currently stored in the HMI41 memory. You can now set the lower limit with buttons v (number up) or w (number down) to correspond to that of the transmitter. Acknowledge the setting with ENTER: T T set Hi °C °C Numbers on the first line start to blink. They indicate the upper limit of the transmitter's temperature range currently stored in the HMI41 memory. You can now set the upper limit with buttons v (number up) or w (number down) to correspond to that of the transmitter. Acknowledge the setting with ENTER and turn the HMI41 off with the ON/OFF button. They indicate the current range of the the transmitter's RH channel currently stored in the HMI41 memory. Select the range with buttons v or w to correspond to that of the transmitter. A text similar to the following is displayed: RH % set Lo Numbers on the second line are blinking. They indicate the lower limit of the transmitter's RH range currently stored in the HMI41 memory. You can now set the lower limit to correspond to that of the transmitter. Set the limit with buttons v or w and acknowledge the setting with ENTER: RH % set Hi Numbers on the first line start to blink. They indicate the upper limit of the transmitter's RH range currently stored in the HMI41 memory. Text in the 1996-08-29 11 HMI41 Calibration Option Operating Manual 19116ZZ-U218en-1. 1 lower righthand corner is Hi. You can now set the upper limit to correspond to that of the transmitter. Set the limit with buttons v or w and acknowledge the setting with ENTER. The HMI41 goes on to T channel settings and a text similar to the following is displayed: T set 2. 3. 4. 2 Temperature channel T set Numbers on the second line are blinking. [. . . ] · After having completed the calibration, press MODE if you wish to perform a temperature calibration (see below), or ON/OFF (disconnect the cable). 3. 3 Temperature calibration As the temperature sensor is extremely stable, temperature calibration should be used for check-ups only. Before starting the temperature calibration, leave the transmitter and the HMI41 to the same room at least for an hour so that their temperatures have enough time to equalize. If the difference between the readings is less than 0. 5 °C, make no adjustments. [. . . ]