RKI Instruments SD-705EC - Manual (Page 17)

PT2E-1140
３．Operation
３−１ Startup Method
(1) Confirm that the power is not supplied to the unit and removes 6 hexagonal socket
headed bolts and lid.
Turn ON the power switch inside the unit.
In this case, the LED and LCD do not go ON because the power is not supplied to
the unit.
(2) Install the lid and 6 hexagonal socket headed bolts.
Tighten these bolts firmly and supply power to the unit.
(3) With power ON to the unit, the “PW/TR” LED light goes ON and the LCD in the
indication window shows ” ” for about 25 seconds during which warming-up and
self-diagnosis are made. (During the period, the 4-20mA output provides output of
2.5mA).
(4) In about 25 seconds, the LCD show the gas concentration value (“0”), etc). When any
abnormality is detected in the course of self-diagnosis, “E-XX” is indicated instead of
the gas concentration value.
With this indication “E-XX”, refer to 5-1, Trouble Indication and Countermeasure.
(5) When the gas concentration value is indicated, carry out the “3-2 Warm-up” and then,
make zero and span adjustments.
The detector will be ready for measurement for about 25 seconds after power ON.
During this period, alarm may be activated if the sensor output is not stable. Make
necessary treatment at upper system or at load side not to be a problem if alarm is
given at powered ON.
Zero and span adjustments shall be done at start-up adjustment and sensor replacement.
Need special tools for these adjustment. It is recommendable to ask our agent or
RIKEN KEIKI.
＊ NOTE
CAUTION ！
３−２ Warm-up
Make warm-up operation for 2∼3 hours when making the start-up adjustment or replacing
the sensor.
３−３ Detection method
After completion of “3-1 Startup Method,” continuous detection will be started.
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