Perma Pure Baldwin-Series M225 - Manual (Page 10)

Section F: LED Indicators 10
F: LED I
NDICATORS
The Model M225 has four green and two red LED operating indicators. These
indicators are arranged vertically on the front of the cooler with the right side
corresponding to CH1 and the left to CH2. The bottom green LED’s indicate the
READY operating temperature status, normally set for 10
° C (50 ° F). After the set-
point temperature is reached, the sample pump may be turned on by other devices.
When the impinger temperature is below 10
° C (50 ° F) the ready LED’s will be on.
Above this temperature, the ready LED’s will be off. The middle green LED’s
(applicable when the alarm relay option is installed) are ON when there is NO water
carry over and OFF when there IS water carry over. The red LED’s at the top are
the thermocouple failure indicators. When this occurs, the red LED stays illuminated.
The M225 cooler has an analog voltage output. This output is factory standard at 0-
2.5 VDC = 0-25
° C. The connector for this output is located on the bottom of the
cooler. It is labeled “Analog Out” (TB1).