User Manual

I
NSTRUCTI ONS FOR USE OF EXTERNAL
EASY ZERO™ ADJUST FEATURE*
1. LOOSEN RING-LOCKING SCREW A.
2. OBTAIN REQUIRED ADJUSTMENT BY
ROTATING KNOB B CLOCKWISE OR
COUNTER-CLOCKWISE.
3
. TIGHTEN SCREW A DOWN ON KNOB B.
*
Applicable only for test gauge with hinged
r
ing design.
ADDI TI ONAL
CALI BRATI ON I NSTRUCTI ONS
1) “Standards shall have nominal errors no greater than
1
⁄4 of these permitted for the gauge being tested.”
(Ref: ASME B40=100-1998)
2) The instrument used as the calibration standard
should have a maximum range no greater than 2x
that of the gauge being tested. (i.e. Do not use a
400psi standard to test a 15psi gauge.)
3) “Known pressure shall be applied at each test point
on increasing pressure (or vacuum) from one end to
the other end of the scale. At each test point the
gauge shall be . . .
lightly tapped, and then read . . .”
(Ref: ASME B40.1 ¶ 6.2.4.1)
4) To read gauge indication, move eye over red pointer
tip at OD of printed dial until red reflection in mirror
band is no longer visible, and then read the pointer
position in reference to the dial.
B
RING
A
© Ashcroft Inc., 250 E. Main St., Stratford, CT 06614-5145, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale.
I&M008-10082 11/01 RevB (250-2917-4) AMR 10/07
ASHCROFT
®
Type 1082 Test Gauge
Calibration Procedure – Pressure Range
Fi g. 1
17