GD-70D - 92 -
CAUTION
Do not press the SET key before the reading is stabilized.
Performing a Span Adjustment
Press the ▲ key until the SPAN screen
displays.
SPAN
MAINTENANCE
Connect Gas
Use the calibration tubing to connect the
demand flow regulator to the tubing stub on
the GAS IN fitting. Gas will begin to flow.
Allow gas to flow for 2 minutes.
Press the SET key when the reading has
stabilized.
* The reading must be above 10% of the full
scale value in order to continue.
SPAN GAS
MAINTENANCE
Disconnect the calibration tubing from the
tubing stub on the GAS IN fitting.
Using the ▲ or ▼ keys, adjust the reading to
match the concentration listed on your
calibration cylinder.
SPAN VAL
Span Adjustment Completed
The instrument will indicate whether the span
adjustment passed (OK) or failed (NG).
SPAN OK
OR
SPAN NG
To save the adjustment result, press the SET
key.
(Press the MODE key to cancel this menu.)
SPAN Y/N
After the span has been recorded, the
instrument will return to 2-2.SPAN
automatically.
SPAN END