Omega cl310 User Manual page 29

5.2-1 HART™ Resistor Selection
The CL310 can be set-up so that the 250 ohm resistor required for
HART™ configuration devices resides inside the CL310. Enabling
the CL310's internal 250 ohm resistor eliminates the need to
manually add a series resistor during a HART™ calibration process.
NOTE: When the CL310's internal 250 resistor is enabled, maximum
load driving capability drops from 1000 ohms @ 20mA to 750 ohms
@20mA.
Enable/Disable Procedure
1. Remove the battery cover and remove the 2 screws that are
at the top of the case.
2. Remove the 2 screws on the bottom or lower portion of the
case.
3. Gently remove the top half of the case from the bottom.
4. Figure 10a. shows the location of the HART™ jumpers.
5.3 Measuring Pressure
Note: The CL310 is compatible with OMEGA Pressure Modules. The
accessory PCL-PMA is required for pressure measurement.
Note: Pressure is not read from modules with frequency or pulse train
mode enabled.
To avoid a violent release of pressure in a pressurized system, shut off
the valve and slowly bleed off the pressure before you attach the
pressure module to the pressure line.
To avoid mechanically damaging the pressure module, never apply
more than 10 ft-lb. of torque between the pressure module fittings, or
between the fittings an the body of the module.
To avoid damaging the pressure module from overpressure, never
apply pressure above the rated maximum printed on the module.
To avoid damaging the pressure module from corrosion, use it only
with specified materials. Refer to the pressure module documentation
for material compatibility.
To measure pressure, follow these steps:
1. Connect the pressure module to the calibrator as shown in Figure
18.
The calibrator can measure pressure on both the upper and the
lower display. This makes it possible to measure pressure in two
different units at the same time.
Warning!
Caution
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