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3.3-2 Using Resistance-Temperature-Detectors (RTDs)
The supported types of RTDs are shown in Section 8. Specifications. RTDs are
characterized by their 0°C resistance, R0. The calibrator accepts two, three, and four wire
inputs, with four wire input being the most accurate.
To use the RTD option, apply the following steps:
1. Switch to lower display [LOWER] from Main Menu.
2. Select RTD from the primary parameters. Select [IN] from input/output control.
3. Choose 2, 3, or 4-wire connection [2W, 3W, 4W]. (4-wire allows for the most precise measurement)
4. Select RTD type from the sensor types.
5. Attach RTD leads as shown in Figure 8.
Figure 8. Measuring Temperature with RTD Connection
Resistance can also be measured using this function. To do so, use the above procedure and
choose OHMS from the sensor types. This option can be used along with a table to measure
an RTD which is not programmed into the calibrator.
3.4 Measuring Pressure
Note: The ecom Pressure Module connector (700mA) needs to be purchased to connect
pressure module to calibrator.
Note: The MCAL4200 is compatible with BETA Calibrator Pressure Modules. The accessory
BPPA-100 is required for pressure measurement.
Note: Pressure is not read from modules with frequency or pulse train mode enabled.
Note: On high pressure modules engineering units normally associated with low pressure
ranges such as, inH
O, cmH
O, etc. are not valid selections. Selecting one of this units with a
2
2
high pressure module attached will cause the display to read „----".
Warning!
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.
Caution
To avoid mechanically damaging the pressure module, never apply more than 13.6 Nm
(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.
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