Product Manual

1. The attached small key is for adjustment of the
manometer needle. Adjustment range: 6mmHg from
center of zero position. If needle is beyond this range,
it should be re-calibrated.
2. Put the key into air intake hole, turn in clockwise
direction; needle in the gauge will go left. Turn key in
anti-clockwise direction; Needle will go right.
3. Through such adjustment, the needle will be in exact
position of zero. Remove key when adjustment is
completed.
4. Such adjustment will not cause any discrepancy in
test result.
5. Warning: small key cannot be turned full circle of
manometer. Otherwise, mechanism will be damaged.
INSTRUCTION
Adjustment Range:±6mmHg