Myron L 729II - Manual (Page 29)

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5. If not, adjust the CAL control marked “4mA” until
the DVM indicates 4mA, see figure III.B.3.
6. Press the Full Scale Test Switch, the DVM should
indicate 20 milliamps.
7. If not, adjust the CAL control marked “20mA” until the
DVM indicates 20mA. See figure III.B.3.
8. Calibration is complete
9. Turn power OFF.
10. FOR RESISTIVITY: Remove jumper from Black(BK)
and White(WT) connectors. For Conductivity, go to
step 11.
11. Reconnect sensor wires to sensor terminal block as
shown in figure III.B.4. (*For Resistivity models,
remove the jumper from the black and white
terminals and install the black and white sensor
wires.)
12. Carefully reinstall the front panel, bottom first, ensure no
wires have been pinched between enclosure and front
panel.
13. Reinstall the four (4) screws and tighten.
14. To operate, turn power ON.
MYRON L
COMPANY
Figure III.B.4.
SP1 HYS1
FUSE*
115/
230
}
DIS
3S
INC
SPC
0-10VDC
MAIN CIRCUIT BOARD ASSEMBLY
751 756
752 757
753 758
754 759
4-20
CONNECTOR
CONNECT 4AO
HARNESS HERE
FS SW
FULL SCALE
TEST SWITCH
PWR C GD NC NO CM
BK WT RD GN NU R- R+
SENSOR LEADS
TRANSFORMER
UP
CAL
CHS GND
-121
2000µS
PA
RA
DEC
4-20
REMOVE T
O INST
ALL
SECOND RELA
Y
JUMPER
Figure III.B.5.
(+)
(-)
+ SO PO PI
SO PO PI
-
(+) SIGNAL OUT
POWER OUT
POWER IN +
DVM
Self - Powered
NC
Remote - Powered
(+)
(-)
+
-
(+)
SIGNAL OUT
POWER OUT
POWER IN +
DVM
Remote
Power
Supply
NC
+
-