Meriam M334 4-20 Milliamp Loop Calibrator - Manual (Page 6)

Accessories
AC ADAPTOR (200 to 240 VAC) Part No. 020-0100
AC ADAPTOR (100 to 120 VAC) Part No. 020-0101
Ni-MH 1 Hour Charger w/4 Ni-MH AA Batteries Part No. 020-0103
Warranty
Our equipment is warranted against defective material and workmanship (excluding batteries) for a
period of three years from the date of shipment. Claims under warrantee can be made by returning
the equipment prepaid to our factory. The equipment will be repaired, replaced or adjusted at our
option. The liability of Meriam is restricted to that given under our warrantee. No responsibility is
accepted for damage, loss or other expense incurred through sale or use of our equipment. Under
no condition shall Meriam be liable for any special, incidental or consequential damage.
SETTING UP VALVES
When setting up a valve it is important to correctly set the end stops. Use the Meriam Model M334
to supply the 4 to 20 mA control signal to stroke the valve. Select “SOURCE” and the Meriam Model
M334 will use the internal power source for outputting current or switch to 2-WIRE SIMULATOR to
stroke a valve using any pre-existing installed loop power supply as the power source.
Example:
1) Disconnect the 4-20 mA control wires from the Current-to Pressure (I/P) converter or the actuator.
2) Connect the Meriam Model M334 following the connection diagrams on the prevous pages for
Simulate 2-Wire Transmitters
3) Move the EZ-CHECK™ switch e to “4.00 mA”/”0.0%” and adjust the fully closed stop on the
actuator.
4) Turn the Meriam Model M334’s knob r slowly counterclockwise and verify that the actuator and
valve don’t move. Repeat steps 3 & 4 until no movement is detected.
5) Move the EZ-CHECK™ switch e to DIAL and quickly back to “4.00 mA”/”0.0%” then turn the
Meriam Model M334’s knob r clockwise. The actuator and valve should begin to move.
6) Move the EZ-CHECK™ switch e to “20.00 mA”/”100.0%” and adjust the fully open stop on the
actuator.
7) Turn the Meriam Model M334’s knob r slowly clockwise and verify that the actuator and valve
don’t move. Repeat steps 6 & 7 until no movement is detected.
8) Move the EZ-CHECK™ switch e to DIAL and quickly back to “20.00 mA”/”100.0%” then turn
the Meriam Model M334’s knob counterclockwise. The actuator and valve should begin to move .
Application Notes
Meriam Process Technologies
10920 Madison Ave. • Cleveland, OH 44102 Tel: 216.281.1100 • Fax: 216.281.0228 • [email protected] • www.meriam.com