Ashcroft ZT11 Manuel d'instructions d'installation et d'entretien - Page 5

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Installation and Maintenance Instructions
for ZT11 High Purity Transmitter
•
Product protection class IP67 may be
impaired if the tightening nut for the cable to
the M12 connector (optional) proves insuffi-
cient. Be sure to tighten securely to counter
possible vibration; tightening torque: 3.54 to
4.43 in. lb.
Do not
not perform any wiring procedures
when powering the unit.
6.3 Specifications of the cable with M-12 connector
(optional)
If using a connector that has not been supplied by Ashcroft,
please make sure your connector meets the following
specifications.
CONNECTOR
PUR Cable (Oilproof)
TERMINAL ARRAY
Straight
L Type
(1) Zinc die-casting
(nickel-plated)
Material
(2) TPU (Green)
(3) PUR)
Cable Length (L)
2m or 5m
Conductor Cross
0.34mm
Section
Core Diameter
1.27mm
Including Insulation
External Cable
4.7mm
Diameter
* The protection structure of the cable with M-12 connector is protection class IP67
or higher in a mating state.
•
The cable is comprised of a 4-wire system
m
CAUTION:
(white, black, blue, brown), however, the
white and black wires are not used.

7. Principle of Operation

The transmitter's sensing diaphragm converts pressure to an
electrical signal by use of strain gages. The circuit is a full-
bridge system where the strain gages are positioned on all
four bridge sides and detect the amount of strain. An electrical
signal, in proportion to the strain amount, is then amplified to a
specific value by the electrical circuit and transmitted as direct
current output.
© Ashcroft Inc. 2020, 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: 203-378-8281, Fax: 203-385-0357, www.ashcroft.com
All sales subject to standard terms and conditions of sale. ZT11_Transducer_im_RevA_(I&M011-10274)_04-03-20
PVC Cable (Stainless Nut)
1) Stainless
(2) TPU (Black)
(3) PVC)
2m or 5m
2
2
(22AWG)
0.34mm
(22AWG)
1.52mm
5.2mm
Block diagram (4 to 20mA DC/2-wire system)

8. Zero and Span Calibration

1) Prior to powering the unit, double-check to make sure all
wires have been properly connected. Verify that voltage and
amperage ratings of the power supply and internal resistance
of the external adaptation equipment are within the rated
range of the instrument's load resistance. Lastly, re-confirm
that the pressure transmitter has been installed within an
operating environment that complies with the explosion-
proof specification.
(2) Zero adjustment can be performed once the unit has been
powered for a 15-minute warm-up period. Zero adjustment
can be performed by removing the rubber plug located at
the top of the enclosure. Refer to "9-2. Adjustment" (below)
to adjust properly.
Observe the following precautions
while operating:
• Do not apply any pressure above that refer-
enced on the product's label.
• Do not adjust wiring or insert/remove the
connector while the device is powered, as
m
this may damage the device and/or cause
CAUTION:
an electric shock. All wiring should be con-
nected in accordance to the product wiring
m
diagrams.
WARNING:
• If used with corrosive gas, it is highly
recommended that the pressure transmitter
be fully purged with nitrogen gas prior to
being removed for maintenance or other
servicing. Leaving corrosive gas within a
device will accelerate corrosion by forming
strong acid or alkaline substance generated
internally by moisture or oxygen within the
atmosphere.
9. Maintenance and Adjustment
9.1 Maintenace
Routine inspection should be conducted at least once every
6 months with device recalibration or zero adjustment being
performed as necessary. Product should only be inspected by
properly trained personnel.
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