Hanna Instruments HI 93551R Instruction Manual

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Hanna Instruments HI 93551R Instruction Manual Manual pdf 8 page image

1514The average mode will calculate the average for a period of up to24 hours. If a different mode is selected for that channel, theaverage will no longer calculate and the value will be lost.At the end of the 24 hour period, the "AVG" tag will blink toindicate that sampling has stopped, and the displayed value isthe last average calculated.If a probe is removed or over-range is reached while in averagemode, the display shows flashing dashes and blinking "AVG" tag.The average value is lost and will not restore even if the conditionrestores. To start the average cycle again, either press CLR or re-enter the average mode.• While in T1-T2 (not for HI 93551R), pressing DISP will switchbetween 4 displays:Note: Pressing T1/T2 to change the channel will not alter theinformation chosen to be displayed for each channel (DISP).For example, if T1 is in average mode, the average will continueto be calculated even if the user press T1/T2 to see T2.Note: Relative/average modes cannot be entered if dashes are shownin the main portion of the LCD.Note: The auto-off time is disabled whenever a channel is set toaverage mode.SERIAL PORT COMMUNICATION(HI 93551R & HI 93552R only)HI 93551R and HI 93552R feature an RS232 output for transfer-ring measurement data (once every second for HI 93551R and onceevery 2 seconds for HI 93552R) to devices provided with RS232 input(PC or printer).The communication protocol has been designed to transmit to thereceiving unit all the displayed information.The communication is unidirectional (meter to receiving unit only) andthe transmissions consist in a 32-character ASCII string, compatiblewith our optional HI 92000 software.The 32-character data string is structured as follows:Main portion of the LCD• byte 0 probe type: K-thermocouple (k)• bytes 1, 2 measurement channel: T1, T2, T1-T2 (Td)• byte 3 measurement mode: Normal (blank), Relative (R),Average (A), Average done (a)• byte 4 operating mode: Hold (H), Memory recall (M)• byte 5 blank character• bytes 6-10 measurement: reading (XXX.X or blank XXXX),over-range (OVRG blank), no data (blank ----)• byte 11 temperature unit: C, F• byte 12 blank characterSecondary LCD, left portion• bytes 13, 14 info description: low temperature (Lo), T1 (T1)• byte 15 blank character• bytes 16-20 measurement: reading (XXX.X or blank XXXX),over-range (5 blanks), no data (blank ----)• byte 21 blank characterSecondary LCD, right portion• bytes 22, 23 info description: high temperature (Hi), T2 (T2)• byte 24 blank character• bytes 25-29 measurement: reading (XXX.X or blank XXXX),over-range (5 blanks), no data (blank ----)• byte 30 • byte 31 line feed

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