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42545A Datasheet(PDF) 5 Page - Extech Instruments Corporation. |
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42545A Datasheet(HTML) 5 Page - Extech Instruments Corporation. |
5 / 8 page Model 42545A V4.1 02/08 5 The MODE button options The MODE button is used to access the programming functions of the instrument. The selected function is displayed on the bottom line of the LCD. Each parameter is listed below with an explanation for its use. Press the MODE button to step from one parameter to the next. EMS (Emissivity Value) To change the emissivity value, use the UP and DOWN arrows (the range is 0.10 to 1.00). The current emissivity setting is always shown at the top of the LCD display. A setting of 0.95 covers about 90% of all applications and, when in doubt, should be set as such. Emissivity is discussed in a dedicated section of this manual. MAX (Maximum function) In the MAX mode, only the highest reading encountered in the current measurement session is displayed MIN (Minimum function) In the MIN mode, only the lowest reading is displayed DIF (Max minus Min value) In the DIF mode, the MAX less the MIN is displayed. AVG (Average value) In the AVG mode, all of the readings in the current measurement session are averaged and the value is displayed. HAL (High Alarm setting) The temperature that, when exceeded, causes the audible/visual alarm to trip. LAL (Low Alarm setting) The temperature that, when exceeded high to low, causes the audible/visual alarm to trip. High and Low Alarm Feature The Model 42545a has an alarm feature whereas a High Alarm setting and a Low Alarm setting can be programmed by the user. When either Alarm point is reached the meter will alert the user via an audible beep and LCD display icon. Follow the steps below: 1. Press the MODE button until the HAL (High Alarm) parameter is displayed. Use the UP and DOWN arrow keys to set the desired High Alarm temperature setting. 2. Press the MODE button until the LAL (Low Alarm) parameter is displayed. Use the UP and DOWN arrow keys to set the desired Low Alarm temperature setting. 3. When an alarm limit is reached, the audible alarm will sound and the display icon HIGH or LOW will appear on the LCD. 4. Note that if the bottom switch (located in the battery compartment) is set to OFF, the audible alarm will be disabled. |
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