Avoiding Mechanical Damage
To avoid damaging the pressure module, never apply more
than 10 ft.-lb. of torque between the pressure module fitting
and the body of the module. Always apply appropriate torque
between the pressure module fitting and connecting fittings
or adapters. Figure 1 shows the correct and incorrect ways
to use a wrench when applying torque to the pressure
module fitting.
1 bar
100 kPa
RANGE
Figure 1.
Avoiding Overpressure Damage
Applying pressure in excess of the BURST PRESSURE
specified on the pressure module can destroy the pressure
module. Burst pressure is 2X full scale for the 700P29 and
700P30, and 1.5X full scale for the 700P31.
Avoiding Corrosion Damage
To avoid damaging the pressure module from corrosion, use
it only with a medium that is compatible with Hastelloy C276.
Recommended Measurement Technique
For best results, it is recommended that the module be
pressurized to full scale and then vented to zero pressure
(atmosphere) prior to zeroing and making measurements
with the 700 Series calibrator.
Pressure Calibration Kit
The Fluke 700PCK Pressure Calibration Kit makes it possible
to calibrate pressure modules at ambient temperature with a
precision pressure calibrator or dead weight tester. The
accuracy of the dead weight tester or pressure calibrator
must be significantly better than the pressure module
specification. A 386 or better PC and Windows
®
3.1 or later
are required. The kit is an optional accessory available from
your distributor or Fluke.
Performance Test
If you need to check that the pressure module meets its
accuracy specification, use a dead weight tester or suitable
pressure calibrator. The accuracy of the dead weight tester or
pressure calibrator should be significantly better than the
pressure module specification. Proceed as follows to verify
that a pressure module is operating within specification:
1. Read the pressure value with no externally applied
pressure to make sure the 0% of scale is correct. When
reading the pressure with a 700 Series calibrator, press
the CLEAR (ZERO) key to remove any zero offset.
Note
The pressure zero function is available on Fluke 701
and 702 calibrators with V1.3 or later software.
Contact a Fluke Service Center to upgrade your
V1.0, V1.1, or V1.2 calibrator.
2. Connect the pressure module to a dead weight tester.
3. Set the dead weight tester to 20% of the pressure
module’s full scale value.
4. Make sure the reading agrees with the dead weight
tester value within the specification in Table 1.
5. Set the dead weight tester to 40, 60, 80, and 100% of
full scale and compare the respective readings.
6. If temperature sensitivity is of concern, repeat steps 1
through 5 at various controlled temperatures.
Table 1. Specifications
1
(% of full span)
Model
4
Range
2
Reference Uncertainty
(23
°
±
3
°
C)
Stability
(1 Year)
Temp
(0
°
to 50
°
C)
Total Uncertainty
3
700P29
0 to 3000 psi
0 to 20680 kPa
0 to 207 bar
0.050%
0.010%
0.020%
0.080%
700P30
0 to 5000 psi
0 to 34500 kPa
0 to 345 bar
0.050%
0.010%
0.020%
0.080%
700P31
0 to 10000 psi
0 to 69000 kPa
0 to 690 bar
0.050%
0.010%
0.020%
0.080%
1.
Use of pressure zero function is required to achieve these specifications. Contact a Fluke Service Center to upgrade your Fluke 701 or 702 V1.0,
V1.1, or V1.2 Calibrator.
2.
Available pressure units (psi, kPa, bar, inHg, mmHg, inH
2
0, ftH
2
0, kg/cm
2
, mmH
2
0) are determined by the calibrator being used.
3.
Accuracy specifications apply for 1 year for 0 to 100% of full span from 0 to 50
°
C. Typical uncertainty is 1% of full span from -10
°
C to 0
°
C.
4.
Maximum non-destructive pressure: 2X maximum rated pressure for P29 and P30, 1.5X for P31.
5.
Specifications reflect a confidence interval of 95%.
