H-25C Instruction Manual
Instruction 3015-0216
48
(4) Return the " HEATER " variable resistor adjustment shaft to its starting position. First, turn it
counterclockwise until you reach the limit of rotation, then turn it back clockwise 12 full turns.
(5) Adjust the sensor sensitivity so that the bar graph indicates a value between 80 and 110% (see
Subsection 3.1.3).
5.5
Replacing the Disc Filter
If liquid is sucked in by mistake or the gas suction too weak even after replacing the
probe filter, check the disc filter in the instrument ( see page 6 - 2 , tiger 6.1 any liquid or contamination,
replace the disc filter.
Note: If any liquid is sucked in, dry the inner tube before replacing the filter.
Note the following when replacing the filter:
•
Turn the power switch off.
•
Since the disc filter distinguishes the inflow direction from the outflow direction, mount it correctly. The
shape of the filter case on the gas-inflow side is simpler than on the gas-outflow side.
5.6
Replacing the Fuse
If the instrument will not operate at all when you apply power, check the fuse. The fuse is mounted inside
the power cable connector on the main unit rear. You will also find a spare fuse stored in the connector.
These fuses are attached to a cover, which also serves as the fuse holder; use a flat-blade screwdriver to
open this cover.
If the fuse connected in the circuit is open, replace it with the spare fuse.
[Fuse Ratings] - 3.15A, 250V, fast-blow, miniature type (Bacharach part number: K9346JD)
