Hanna-instruments HI 254 Bedienungsanleitung PDF herunterladen (Seite 26)

CHR n Change the instrument range according with the parameter

value (n):

 n=0 pH range/0.001 resolution

 n=1 pH range/0.01 resolution

 n=2 pH range/0.1 resolution

 n=3 mV range

 n=4 Relative mV range

COMMANDS REQUIRING AN ANSWER

pH? Causes the instrument to send the pH reading. If the range is set

to mV, Err6 is received.

MV? Causes the instrument to send the mV reading. If the range is set

to pH, Err6 is received.

MR? Causes the instrument to send the relative mV reading. If the

range is set to pH or mV, Err6 is received.

TM? Causes the instrument to send the temperature reading.

RAS Causes the instrument to send a complete set of readings in

according with the current range:

 pH, mV and temperature reading on pH range.

 mV and temperature reading on mV range.

 Rel mV, absolute mV and temperature reading on Rel

mV range.

MDR Requests the instrument model name and firmware code.

PAR Requests the setup parameters setting (instrument ID, calibra-

tion alarm time-out, pH range, beep status).

NSL Requests the number of logged samples.

GLP Requests the calibration data record.

LOD xxx Requests the xxx

record logged data (Err3 is sent when xxx

is an invalid record number).

LOD ALL Requests all logged data.

Note:  Err8 is sent if instrument is not in measurement mode.

 Err7 is sent if mV are asked during pH calibration mode.

 NAK (21) character is sent when the instrument receives an

unknown or a corrupted command.

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Hanna-instruments HI 254 Bedienungsanleitung Seite 26