Measuring Pressure - Martel MC1210 Reference Manual

5.3 Measuring Pressure

Find Quality Products Online at:
Figure 17. Connection Using Current Loop
5.2-1 HART™ Resistor Selection
The MC1210 can be set-up so that the 250 ohm resistor required for Hart™ configuration
devices resides inside the MC1210. Enabling the MC1210's internal 250 ohm resistor
eliminates the need to manually add a series resistor during a Hart™ calibration process.
NOTE: When the MC1210'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.
Note: The MC1210 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.
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.
GlobalTestSupply
www.
Warning!
.com
23
sales@GlobalTestSupply.com