Thermo Scientific NESLAB EX Series Installation, Operation And Maintanance Manual page 53

Table 2 Read Status
BIT d1
b.7 = 1 RTD1 Open Fault
b.6 = 1 RTD1 Shorted Fault
b.5 = 1 RTD1 Open
b.4 = 1 RTD1 Shorted
b.3 = 1 0
b.2 = 1 0
b.1 = 1 0
b.0 = 1 0
BIT d4
b.7 = 1 Buzzer On
b.6 = 1 Alarm Muted
b.5 = 1 Unit Faulted
b.4 = 1 Unit Stopping
b.3 = 1 Unit On
b.2 = 1 Pump On
b.1 = 1 0
b.0 = 1 Heater On
**LED bits in REQ STATUS1 byte d5
LED State LED Flashing
OFF 0
ON 0
FLASHING 1
Invalid 1
b.7 = most significan bit
b.0 = least signifcant bit
Table 3 Qualifier Byte
10 hex
20 hex
11 hex
21 hex
Example: The temperature of 45.6°C would be represented by the qualifier 11 hex, followed by the 2 bytes 01 C8
hex (456 decimal).
d2
RTD2 Open Fault
RTD2 Shorted Fault
RTD2 Open Warn
RTD2 Shorted Warn
RTD2 Open
RTD2 Shorted
RTD2 Controlling
HTC Fault
d5
RTD2 Controlling
Heat LED Flashing**
Heat LED On
0
0
0
0
0
LED On
0
1
1
0
0.1 precision, no units of measure
0.01 precision, no units of measure
0.1 precision, °C units
0.01 precision, °C units
d3
High Fixed Temp Fault
Low Fixed Temp Fault
High Temp Fault
Low Temp Fault
Low Level Fault
High Temp Warn
Low Temp Warn
Low Level Warn
B - 5