28
Instruction Manual Mi170 Bench Meter
The instrument will answer for this command with:
<STX> <answer
>
<ETX>
where: <STX> is 02 ASCII code character (start of text)
<ETX> is 03 ASCII code character (end of text)
<answer>:
<ACK> is sent for a recognized command
<CAN> is sent when the instrument is logging
<Err6>/<Err8> is sent when the command is incorrect or the instrument is
not in measurement mode.
COMMANDS REQUIRING AN ANSWER
The instrument will answer for these commands with:
<STX> <answer> <checksum> <ETX>
where the checksum is the bytes sum of the answer string sent as 2 ASCII characters.
All the answer messages are with ASCII characters.
REC
Causes the instrument to send a complete set of readings in according with the
EC range.
RTD
Causes the instrument to send a complete set of readings in according with
the TDS range.
RNC
Causes the instrument to send a complete set of readings in according with
the NaCl range.
MDL
Requests the instrument model name and firmware code (16 ASCII chars).
INF
Requests the calibration data and the setup parameters.
SAM
Requests the number of logged samples (12 chars).
LDEC
Requests the xxx
th
EC record logged data.
LDTD
Requests the xxx
th
TDS record logged data.
LDNC
Requests the xxx
th
NaCl record logged data.
LAEC
Requests all EC Log on demand.
LATD
Requests all TDS Log on demand.
LANC
Requests all NaCl Log on demand.
Notes
:
• “Err8” is sent if the instrument is not in measurement mode.
• “Err6” is sent if the requested range is not available.
• “Err4” is sent if the requested set parameter is not available.
• “Err3” is sent if the Log on demand is empty.
• Invalid commands will be ignored.
5
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SPECIFICATIONS
(
*
)
Uncompensated conductivity (or TDS) is the conductivity (or TDS) value without temperature compensation.
Range
EC
0.00 to 29.99 µS/cm
30.0 to 299.9 µS/cm
300 to 2999 µS/cm
3.00 to 29.99 mS/cm
30.0 to 200.0 mS/cm
TDS 0.00 to 14.99 mg/L (ppm)
15.0 to 149.9 mg/L (ppm)
150 to 1499 mg/L (ppm)
1.50 to 14.99 g/L (ppt)
15.0 to 100.0 g/L (ppt)
up to 400.0 g/L (uncompensated TDS)* with 0.80
conversion factor
NaCl 0.0 to 400.0%
Temp -20.0 to 120.0
°
C (-4.0 to 248.0
°
F)
Resolution
EC
0.01 µS/cm
0.1 µS/cm
1 µS/cm
0.01 mS/cm
0.1 mS/cm
TDS
0.01 mg/L
0.1 mg/L
1 mg/L
0.01 g/L
0.1 g/L
NaCl
0.1%
Temp 0.1
°
C (0.1
°
F)
Accuracy
(@25 °C / 77 °F)
EC
±1% of reading ±(0.05 µS/cm or 1 digit)
TDS
±1% of reading ±(0.03 mg/L or 1 digit)
NaCl
±1% of reading
Temp ±0.4
°
C (±0.8
°
F)
