88
4.2.8 111BIR cell temperature control
Fig. 32: IR cell temperature control
TP28 is the test point for measuring the set point of the IR temperature against
TP1=GND.
At 3000 mV the temperature is 27°C growing with 10 mv /°C.
4.2.8.1 Examples
3.10V 37°C
3.30V 57°C
This is the adjustable temperature range of the cell in normal cases. This
temperature range is adjustable when there is a jumper set on position 6-Lo
temperature of JP1 and mainly there is no jumper on position 5-Hi Temp of JP1. In
other words, when no jumper is set, this temperature range is already by default. A
jumper in position 6-Lo Temp will keep this range, so there is no difference, but the
jumper will be available when a jumper is elsewhere really needed.
3.73V 100°C
3.98V 125°C
This temperature range is available for heated paths only. They are the paths for
measuring water resp. hydrogen in the analyzers CW and CHS and possibly later
in CHNS analyzers. In order to have the temperature adjustable in the above
range, a jumper has to be set on position 5-Hi Temp. of JP1.