Instruction manual
10.0 OTHER FUNCTIONS    SM425 INSTRUCTION MANUAL 
10.4 Reset 
Resetting is a restart of the analyzer. The equipment is reset by turning the power off and then back on. 
An analyzer processor restart can also be initiated without cycling power. Resetting is required if any of 
the following error conditions occur: 
1.  Error 1 – if the cell voltage is defective 
2.  Error 2 – if a temperature alarm occurs 
3.  Error 3 – if the A/D converter is defective 
4.  Error 4 – if an EEPROM write error occurs 
For details on error conditions, refer to Section 0, “Troubleshooting”. 
If any of the above problems occur, the equipment turns off the power to the detector heater. To cancel 
the error, reset the equipment following the steps below or turn the power off and then back on. 
Make sure there is no problem with the detector or converter before cycling power. 
If resetting does not clear the error condition, turn the power off and troubleshoot the problem according 
to the instructions in the Troubleshooting section (Section 0). 
Reset the equipment using the following instructions: 
1.  Press the Setup key in the Basic panel display screen to display the Execution/Setup display 
screen. 
2.  Press the Reset key on the Execution/Setup display screen. The Reset display screen shown in 
Figure 10-13 appears. 
3.  Choose Start reset key and then press the [Enter] key to reset the equipment. The equipment will 
then be in its warm-up state. 
Figure 10-13 Reset Display 
10.5 Handling of the ZO21S Standard Gas Unit 
The following instructions describe how to flow zero and span gases using the ZO21S Standard Gas Unit. 
Use the ZO21S Standard Gas Unit, to calibrate a system classified as System 1, according to the 
following procedures. 
42500001 REV A    167 










