Elma 80 223 40, User Instructions, Page: 4 / 9

Calibration of the equipment at 4Hz reading before use:
Remember :
Small current clamps M1 shall be set at: 10A Medium
current clamps C173 shall be set at: 1000mV/A Large current clamps D37N
shall be set at: 100mV/A
The receiver may be used for all those tongs, so in case one wishes,
extra clamps may be bought later.
Connect the generator to the measuring lines, so that those make a loop
(see fig.) The switch shall be set at “4Hz cont.
Connect change-over switch M1 to the receiver, and set the change-
over switch in position “Small 1000m V/A 4Hz”.
Surround the generator loop with the current clamps. Adjust the small
pot meter (8) on the side of the receiver with the mini-screwdriver, till it
shows about 100 on the display. This will then correspond to a 100%-
signal.
Thereafter, make the same adjustment for the other clamps: For C173:
Change-over switch in position “Large 1000mV/A, adjust pot. (7). For D37N:
Chang-over switch in position “Large 100mV/A, adjust pot. (6).
Give the receiver time to get stabilized. This is in particular necessary
when adjusting the largest tongs (D37N), because of high
amplification.
The system is now ready for use. Calibration is most often not
necessary for each use, but it is advisable to check after some time.