Bacharach H25-IR Manuale Utente

H25-IR 

Operation 

 

Instruction 3015-4342 

35

 

When the instrument’s diagnostics detects that a fault has occurred, the word “FAULT” appears in place of 
the Gas Type, and an audible beep occurs every 2 seconds.  

 

 
 

 

 
 

The cause of the fault can be determined by viewing the Diagnostic menu’s Last Fault function. To display 

the Diagnostics menu, first press both the ENT and ESC buttons on either the instrument’s front panel or 
Smart probe at the same time to display the Main menu. Next, use the Up and Down buttons to highlight 

“DIAGNOSTICS” and then press ENT to display the Diagnostics menu.  
 
Main Menu:  

 

SYSTEM 

 LOG 
 SETUPS 

 CAL 

DATA 

 DIAGNOSTICS 
 FACTORY

 

 

 
 

 

Select “LAST FAULT” to display the Last Fault screen. Refer to Section 5.1.2 Last Fault for a listing of the 
type of faults that are tracked by the diagnostics, and for information on how to possibly correct the fault. 

 
Once the cause of the fault has been corrected, the FAULT message and the audible beep are 

automatically turned OFF. 

 
 

The instrument maintains its accuracy under varying atmospheric conditions by performing an 

atmospheric pressure check either once every hour, or immediately after calibration (refer to Section 
Error! Reference source not found. Error! Reference source not found.). When a PCHK is 

performed, the unit beeps once, the pump stops, a valve opens exposing the pressure sensor to the 
atmosphere, and “PCHK” appears at the bottom-right of the display. During this time the instrument 

measures the current atmospheric pressure, and then uses this value along with the current temperature 

and the ideal gas law to compute the gas level. When the pressure check is complete (approximately 5 
seconds), the unit beeps, the valve closes, and the pump restarts. 

 

 
 

 

 
 

 

The RS-232 connector located on the rear of the instrument (refer to Section 1.7.2 Rear View) is used to 
flash the instrument’s memory. Refer to Section 5.3 Flashing Memory. 

 
 

 

Oz/yr 

R134A 

SETUP 

          PCHK 

Pressure check being performed

 

SENSOR DATA 

 LAST 

FAULT 

 

IR EMITTER 

 PRESSURE 

Fault has occurred

Oz/yr 

FAULT 

SETUP 
SM  SRCH