
Transmitter M400 124
© 02 / 2010 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter M400
Printed in Switzerland 52 121 378
Parameter Sub parameter Value Unit
Cal constants
(analog sensors)
Cond / Res
M = 0.1,
A = 0.0
cm
–1
Ω
Cond / Ind
M = 2.1750,
A = 0.0
cm
–1
Ω
O2 high
S = –70.00
A = 0.0
nA
nA
O2 low
S = –350.00
A = 0.0
nA
nA
pH incl. ISFET
S = 100.0,
Z = 7.0
%
pH
pH – mV S = 1.0, Z = 0.0
CO
2
S = 100.0
Z = 7.0
%
pH
Temperature
M = 1.0,
A = 0.0
Ω
Analog Out 1 Ch A – pH (M400 Type 1, 2, 3) MΩ-cm
Ch A – Conductivity
(M400 Type 1 Cond Ind )
S/cm
2 Ch A – Temperature °C
3 Ch B – pH (M400 Type 1, 2, 3) MΩ-cm
Ch B – Conductivity
(M400 Type 1 Cond Ind)
S/cm
4 Ch B – Temperature °C
All analog out Mode 4 – 20 mA
Type Normal
Alarm Off
Hold mode Last value
Conductivity
Resitivity
Value 4 mA
0.1
10
µS/cm
MΩ-cm
Value 20 mA
10
20
µS/cm
MΩ-cm
Dissolved Oxygen (M400, type 2) Value 4 mA 0 %sat
Value 20 mA 100 %sat
Dissolved Oxygen (M400, type 3) Value 4 mA 0.000 ppb
Value 20 mA 100.0 ppb
pH incl. ISFET Value 4 mA 2.000 pH
Value 20 mA 12.00 pH
Dissolved carbon dioxide Value 4 mA 0 hPa
Value 20 mA 100 hPa
Temperature Value 4 mA 0 °C
Value 20 mA 100 °C
Set point 1 Measurement a
Type Off
Conductivity
Resistivity
High Value
0
0
S/cm
MΩ-cm
Low Value
0
0
S/cm
MΩ-cm
O2 High Value 50 % sat
Low Value 0 % sat
pH (incl. ISFET) High Value 12 pH
Low Value 0 pH
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