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11.7 CALIBRATION USING THE KEYPAD
See the appendix for the keypad field calibration procedure.
12 CLEAR FIELD CAL
The Clear Field Calibration function restores the instrument to the last factory calibration.
12.1 CLEAR FIELD CAL USING THE SERIAL INTERFACE
Press "Esc"
The unit will return the command prompt "H2scan:"
Type "x" then hit "Enter" and follow the prompt to clear the field calibration.
12.2 CLEAR FIELD CAL USING THE KEYPAD
See the appendix for the keypad clear field calibration procedure.
13 MESSAGES
In this section XXX refers to a number
13.1 WARMUP_XXX
Warmup_XXX is displayed when the sensor is turned on or reset. It will start at a time programmed
at the factory and count down to 0.
13.2 SETTLE
When the sensor is waiting for the die temperature to stabilize, "Settle" (truncated on the LCD) is
displayed. The settling time varies depending on the sensor and local conditions and could take up
to five minutes.
13.3 WAIT_XXX
This message usually appears counting down a delay.
For example, during field calibration the sensor is expecting the gas to be applied for a certain
length of time. In this case WAIT_XXX will appear counting down the remaining time.
Wait_100 continuously displayed is a special case. It appears when the sensor is waiting for an
event that will not occur at a particular time. Once this event occurs it changes to a counter
initialized to some value (Wait_XXX) and counts down from there.
During field calibration "Wait_100" commonly appears in the third stage in which it is waiting for 0%
after 2% hydrogen. In this case the event for which it is waiting is 0% hydrogen, so it could display
"Wait_100" between settling and 0%. If 0% occurs before the temperature settles, it will display
"Settle" until the temperature is stable, then "Wait_XXX" which will count down to zero.
If it is displayed for more than five minutes, cycle the power to the unit. It should return to normal
operation.
13.4 HTROFF
The "htroff" error could be caused by one of several error conditions that cause the 2605 to turn off
the sensor heater. Sometimes the error occurs because of a transient condition ("glitch"). If "htroff"
is displayed, cycle the power to the unit. It should return to normal operation. If the error is
permanent, the unit must be returned to H2scan for examination.
90000012 R8
HY-ALERTA™ 1600, Intrinsically Safe Area Hydrogen Monitor
OPERATING MANUAL
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