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M400E Ozone Analyzer Operator’s Manual Theory of Operation
11.3.4.5. Thermocouple Inputs and Configuration Jumper (JP5)
In its base configuration, the M400E analyzer does not include any thermocouple sensors, however in
instruments where the optional metal wool scrubber (OPT-68) is installed one thermocouple is used to sense the
temperature of the scrubber. By default, this single thermocouple input is plugged into the TC1 input (J15) on
the relay PCA. TC2 (J16) is currently not used.
Table 11-2: Thermocouple Configuration Jumper (JP5) Pin-Outs
TC INPUT
JUMPER
PAIR
DESCRIPTION FUNCTION
1 – 11
Gain Selector
Selects preamp gain factor for J or K TC
OUT = K TC gain factor; IN = J TC gain factor
2 – 12
Output Scale Selector
Selects preamp gain factor for J or K TC
OUT = 10 mV / °C; IN = 5 mV / °C
3 – 13
Type J Compensation
When present, sets Cold Junction Compensation
for J type Thermocouple
4 – 14 Type K Compensation
When present, sets Cold Junction
Compensation for K type Thermocouple
TC1
5 – 15 Termination Selector
Selects between Isolated and grounded TC
IN = Isolate TC; OUT = Grounded TC
TC2
NOT USED
Input Gain Selector 1 – 11
Type J Compensation 4 – 14
Output Scale Selector 2 – 12
Type J Compensation 3 – 13
Termination Selector 5 – 15
TC2
Not Used
TC1
Figure 11-11: Thermocouple Configuration Jumper (JP5) Pin-Outs
Table 11-3: Thermocouple Settings for Optional Metal Wool Scrubber
TC
TYPE
TERMINATION
TYPE
OUTPUT
SCALE TYPE
JUMPER
BETWEE
N PINS
JUMPER
COLOR
K
ISOLATED 10mV / °C
4 – 14
5 – 15
PURPLE
04315 Rev. C1 205