Bacharach H-25C, Инструкция

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H-25C Instruction Manual
Instruction 3015-0216
30
3.1.3 What to Do If the CAL FAIL Indicator Appears
If the CAL FAIL indicator appears during calibration, no calibration is performed. When CAL FAIL
indicator appears, one of the following five fail codes is displayed on the data display area while the
instrument stabilizes.
Take appropriate action for the displayed fail code.
E - 1 (no sensor sensitivity)
E - 2 (sensor sensitivity too low)
E - 3 (sensor sensitivity too high)
E - 4 (calibration gas pressure adjustment failed)
E - 5 (unstable sensor sensitivity)
(1) E-1 (No Sensor Sensitivity)
This fail code is displayed if the sensor does not detect the calibration gas. The three most likely
possible reasons for this are :
•
Sensor sensitivity is unstable due to poor adjustment, or the sensor has reached the end of its
service life.
[Action] Try repeating the calibration. If " CAL FAIL " appears again, see Subsection 6.2.8 and
take appropriate action.
•
The calibration gas is not being sucked in from the probe AM FLOW " is displayed ).
•
The capillary is plugged and the calibration gas cannot flow out from the CAL PORT.
(2) E .2 (Sensor Sensitivity Too Low) or E - 3 (Sensor Sensitivity Too High)
This fail code is displayed if the sensor sensitivity is outside the calibration range.
[ Action] Adjust the sensor sensitivity.
The tolerance range is 60 to 150% on the bar graph (the 150% end of this range is the lower
sensitivity end). Sensitivity outside the tolerance range is indicated as follows:
Use the HEATER variable resistor in the setup area to adjust sensor sensitivity. The HEATER
variable resistor changes the voltage of the sensor heater. If the sensor sensitivity is too low, turn the
knob clockwise. If the sensitivity is too high, turn the knob counterclockwise.
This adjustment cannot be completed simply by watching the sensitivity display while turning the
knob. Repeatedly check the sensitivity by performing calibration after each adjustment (turn the knob
about 30 to 90 degrees each time). Wait at least three minutes after each adjustment before
performing the calibration so that the sensor temperature has time to stabilize. Repeat the
adjustment and calibration procedure until the bar graph reaches 90, 100, or 110%.