Using The Upper And The Lower Display For Calibration And Testing; Testing An Input Or Indicating Device; Calibrating An I/P Device - Ecom Instruments MCAL 4200 Bedienungsanleitung

2. Switch to either upper or lower display from the Main Menu.
3. Select [PRESSURE] from the primary parameters.
4. Select the desired measuring unit.
5. Zero the pressure module. The zero function on the calibrator can be found in the pressure
zeroing menu.
Note: On high pressure modules engineering units normally associated with low pressure
ranges such as, inH
high pressure module attached will cause the display to read „----".
6. Using the Upper and the Lower Display for Calibration and Testing

6.1 Testing an Input or Indicating Device

To test and calibrate actuators, recording, and indicating devices using the source functions,
follow these steps:
1. Select the lower display and choose the correct primary parameter.
2. Switch to [OUT] in the input/output control.
3. Connect the leads to the instrument and the calibrator as shown in Figure 19.

6.2 Calibrating an I/P Device

The following steps show how to calibrate a device that controls pressure:
1. Select upper display from the Main Menu, and select pressure from the primary parameters.
2. Switch to lower display from the Main Menu, and select current source [mA out] from the
primary parameters.
3. Connect the calibrator to the device as shown in Figure 20. The calibrator will simulate the
transmitter current and measure the output pressure.
4. Enter a current using the keypad.
68
Figure 18. Measuring Pressure Transmitter
O, cmH O, etc. are not valid selections. Selecting one of this units with a
2 2
Figure 19. Connections for Testing an Output Device