Gas sensitivity calibration method – RKI Instruments SD-705EC User Manual

Page 21

PT2E-1140

LCD indication

Displays set potential

Zero adjustment mode

Span adjustment mode

4mA adjustment mode

Alarm point set mode

Alarm test mode

Point skip set mode

＜Common operation ∼ To enter maintenance mode＞

① To enter maintenance mode, press MAINTENANCE switch● by control key for

3 seconds in normal measuring mode.

② When entered maintenance mode after 3 seconds, 4-20mA output becomes 2.5mA

and SKIP light is flickering. Release control key after entered.

③ Change indication number with pressing UP▲ or DOWN▼ switch by control key.

And press SET switch● when the mode you want to enter is indicated.

＜Common operation∼To change the mode＞

① Display goes to MENU when press MAINTENANCE switch● during each mode.

② Change indication number with pressing UP▲ or DOWN▼ switch by control key.

And press SET switch● when the mode you want to enter is indicated.

＜Common operation∼To cancel maintenance mode＞

① Display goes to MENU when press MAINTENANCE switch● during each mode.

② To recover measuring mode, press MAINTENANCE switch● for 3 seconds during

③ When entered measuring mode, SKIP light goes off and indicating as it is measuring mode.

４−３ Gas Sensitivity Calibration Method

The following tools and jigs are necessary for zero and span adjustments.

・ Gas sampling bag
・ Calibration adaptor
・ Calibration gas
・ Control key