RKI Instruments SD-705EC - Manual (Page 27)

PT2E-1140
・ When open the lid, wait for wore than 30 seconds after put off the power supply.
If not, explosion proof performance can not be guaranteed.
・ It becomes measuring mode for about 25 seconds after powered ON. The detector
may give an alarm if the sensor is not stabled enough. Please make necessary
treatment not to make trouble outside even if an alarm is activated.
CAUTION
＊
(8) Connect voltmeter to TP0(+) and TP3(-) on the printed circuit board inside detector
and confirm the sensor set potential.
Adjust the set potential to designated value with potentiometer VSET VR.
(9) Fasten the lid with hexagonal socket headed bolts tightly.
Make warm up according to “3-2 Warm up Operation”. Then make zero and
span adjustment respectively according to “4-3 Gas sensitivity Calibration method.”
＊ NOTE
After sensor replacement, be sure to carry out zero and span adjustments.
Accordingly, it is recommendable to contact with our local agent for sensor
replacement.
４−９ Fuse Change Method
When open the lid, wait for more than 30 seconds after put off the power supply.
If not, explosion proof performance can not be guaranteed.
！ CAUTION
(1) Turn OFF power supply to the unit.
(2) Remove 6 hexagonal socket headed screw and lid in the front, and remove the fuse on
the internal board. (For the fuse position, refer to Page 5. Internal View).
(3) Install the attached fuse (0.5A), install the lid and 6 hexagonal socket headed screws,
and tighten these screws.
(4) Turn ON power supply to this unit. Confirm that the operation is normal. If not, refer to 5.
Abnormality and Countermeasures.
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