SPECIFICATIONS
Accuracy specifications presented herein are ob-
tained by comparison with primary standards
traceable to the National Institute of Technology
(NIST). These specifications are obtained in ac-
cordance with the ISO Guide to the Expression of
Uncertainty in Measurement (GUM). Mensor also
adheres to ANSI/NCSL-Z540. If there is an excep-
tion to the requirements and recommendations of
Z540 during a calibration the exception is noted on
the individual calibration certificate.
Mensor reserves the right to change these specifi-
cations without notice.
MEASURE SPECIFICATIONS
Accuracy
0.010% FS including linearity, hysteresis, re-
peatability and temperature after zeroing at the
operating temperature over the calibration inter-
val. Optional 0.025% FS accuracy available.
Precision
0.003% FS.
Calibration Stability
0.010% FS for 180 days after re-zeroing. Op-
tional 0.025% FS accuracy instruments are
0.025% for 180 days after re-zeroing.
Pressure Ranges
Standard Ranges:
Psia: 0-5 to 0-2,000 max.
Psig: 0-0.36 to 0-2,000 max.
Bi-directional, Vacuum: -0.36 to +0.36 min.,
-atm to 2,000 max.
Measurement Units
Refer to Table 9.1 in the Appendix section.
Resolution
Up to 1 PPM.
Calibration Adjustments
Zero may be offset up to ±16 psi either from the
front panel, or over a remote bus.
Span may be adjusted up to ±0.1% of the sensor
full scale value, either from the front panel, or
over a remote bus.
Calibration Interval
Initially, the recommended period between cali-
brations is 180 days. This period may be ex-
tended as confidence is gained in the span
stability.
Measurement Filter
The measurement filter is a user adjustable filter
that takes the specified percentage of the pre-
vious reading plus (1 - [filter % divided by 100])
x the new reading. If two consecutive readings
are further apart than the user-specified filter
window, the previous reading is reset to the new
reading value.
CONTROL SPECIFICATIONS
External Pressure Requirements
Reference Pressure: Atmosphere for gauge mod-
els. Permanent vacuum for absolute models.
Source Pressure (for ranges >5 psi): Instrument
air or dry nitrogen at pressure equal to FS plus
10 psi or 110% of FS. Accurate external regula-
tion is not required.
Exhaust Pressure: Atmospheric exhaust for
gauge pressure control above 0.05 psig. Vacuum
source required for gauge control below 0.05
psig and absolute pressure control. A vacuum
pump is recommended for gauge control of posi-
tive pressures below 0.25 psig.
External Volume Requirements
Up to 1/2 liter.
Stability of Controlled Pressure
>2 psi: ±0.004% FS
<2 psi: ±0.008% FS
Minimum Control Pressure
Gauge and Absolute Instruments (positive
pressure): Exhaust pressure plus 0.05% FS, or
exhaust pressure plus 0.025 psia, whichever is
greater.
PCS 400 SPECIFICATIONS
www.mensor.com 7-1
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