Manual

Model K1 Pressure Transmitter
BULLETIN PT-1
APPLICATIONS
Hydraulic, refrigeration, machine tool,
test/measurement, pump control, HVAC,
medical, construction equipment and
all general purpose industrial process
a
pplications
FEATURES:
• 0.5% and 1.0% accuracy
•
Vac.-20,000 psi pressure range
• FM approved (optional)
• Superior long-term stability and
repeatability
• Stainless steel NEMA 4X enclosure
• Current/voltage output
• Wide range of electrical connections
available
• Optional panel meter digital display –
see Ashcroft model 2269
The Ashcroft
®
K1 is a proven and versa-
tile pressure transducer/transmitter incor-
porating polysilicon thin film technology.
Modern low-pressure chemical vapor dep-
osition methods provide simple, stable
molecular bonds between the metal
diaphragm and a polysilicon strain gage
bridge. There are no epoxies or bonding
agents to contribute to signal instability
or drift. The integral metal diaphragm and
polysilicon bridge are virtually unaffected
by shock, vibration or mounting.
These transmitters are offered in many
standard pressure ranges with either cur-
rent or voltage output signals. Transmitter
performance is directly traceable to the
NationaI Institute of Standards and
Technology. A calibration test certificate is
available with each transmitter.
PERFORMANCE SPECIFICATIONS
Accuracy Class (Span): ±0.5% ±1.0%
Includes non-linearity
(Terminal Point Method), hystere-
sis, non-repeatability, zero offset
and span setting errors
Best Fit Straight Line (BFSL) ±0.25% ±0.4%
Non-linearity
Interchangeability ±0.5% ±1.0%
Durability: 10
8
cycles 20/80% span with negligible
performance change
Stability: ±0.5% Span/yr
ENVIRONMENTAL SPECIFICATIONS
Temperature Limits:
Storage: –54 to 121°C (–65 to +250°F)
Operating: –28 to 82°C (–20 to +180°F)
Comp. Range: –28 to 71°C (–20 to +160°F)
Thermal Coefficients: (68°F (20°C) ref.) % Span/°F:
Accuracy Class: 0.5% 1%
ZERO ±0.028% ±0.04%
SPAN ±0.028% ±0.04%
Optional (0.5% Accuracy Class only):
ZERO ±0.014% N/A
SPAN ±0.014% N/A
Multiply thermal zero coefficients by 1.5 on 0/30
psi, vac/15 range and by 3 on 0/15 and vac/0
ranges
Humidity: No performance effect at 95% relative
humidity-noncondensing
FUNCTIONAL SPECIFICATIONS
Standard Ranges (psi) gauge, compound:
0/15* 0/300 0/5000 vac./60*
0/30* 0/500 0/7500* vac./45*
0/60* 0/750 0/10,000* vac./30*
0/100 0/1000 0/15,000* vac./15*
0/150 0/2000 0/20,000* vac./0*
0/200 0/3000
*1% accuracy ranges only.
Consult factory for nonstandard ranges\.
Overpressure Limits (F.S.):
15- 3000- 7500-
2000 5000 20,000
Proof 200% 150% 120%
Burst 800% 300% 150%
Vibration Sweep: Less than ±0.1%F.S. effect for
0-2000 Hz at 20 g’s in any axis
Shock: Less than ±0.05% F.S. effect for 100 g's,
20ms shock in any axis
Response Time: Less than 5 ms
Position Effect: Less than 0.01% F.S.
ELECTRICAL SPECIFICATIONS
Output Signal (consult factory for options):
4-20mA (2 wire)
1-5 Vdc (3 wire)
1-6 Vdc (3 wire)
1-11 Vdc (3 wire) (minimum excitation 15 Vdc)
Power Requirements: 10-36 Vdc unregulated,
<3mA for voltage output
LOOK FOR THIS AGENCY
MARK ON OUR PRODUCTS
Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USA
Tel: [phone] • Fax: [phone]
email: [e-mail] • www.ashcroft.com
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
© Ashcroft Inc. 2009 11/10
Ash Bul PT-1:Layout 11/12/10 1:59 PM Page 1