Page 6
Issue/Rev. 0.2 (7/00)
Your WCM 7300 Into Operation
Mechanical Installation
For best results, install the probe with the following
requirements:
Probe is in a vertical piping section (in-line probe
only).
Flow is from bottom to top (in-line probe only).
If probe is installed on a pressure vessel, the probe
must be installed in piping prior to dump valve.
Air or gaseous content is minimized.
Note: The probe must be full of oil for proper opera-
tion.
Caution: Operating the instrument while the probe
is empty or partially filled will not damage the
instrument, however, invalid readings or under-
range indication will occur.
Electrical Installation
Connect 18-32 Vdc to the terminal block inside the
back (non-windowed) cover of the instrument. The
power connections are marked “+24V” and “24V GND”.
Note: For initial operation, only power is required.
The LCD display will provide the necessary informa-
tion to verify operation. To connect the analog outputs
and/or the relay alarm, refer to the detailed section on
electrical connections.
Field Calibration
The WCM 7300 has been factory tested, however, it
must be field calibrated as follows.
Warm Up
Apply power to the WCM 7300. Allow the instrument
to be powered for at least 10 minutes before calibrat-
ing the unit.
1. Bring system into operation with normal flow through
the probe. Allow the temperature to stabilize.
Note: Since the unit is not yet field calibrated,
Error advisory messages may flash on the display.
Ignore these until after calibration.
2. Take a grindout for water in the oil. For calibration
purposes, the oil should preferably have less than
1% water in it.
3. With the condulet cover removed, depress all three
buttons at the same time.
4. When the display reads Program Mode, release
the buttons. You are now in programming mode.
5. Press the Left Arrow button three times and then
the Up Arrow button twice.
6. The unit should be displaying Last Cut x.xx% where
x.xx is the Cut Value used for the last calibration.
Ignore this for now.
Quick Steps for Putting
Note: If you entered the sequence in Step 5 incor-
rectly, the display will be reading something
different. To start over, press Enter until past the
display that says Program Done. Then restart at
Step 3.
7. Press Enter to proceed to the next display.
8. The display will now say “Do Cal? YN”. The N
should be flashing (meaning no). Select Y (yes)
by pressing the Left Arrow key. The Y will now be
flashing.
9. Press Enter to confirm yes and proceed to the next
display.
10. The display should now read “CAL with X CUT”
where X is 1 or 2. The number will be flashing.
Pressing the Up Arrow key will toggle the number
between 1 and 2. Select 1 if this is the initial
calibration. Select 2 if you are entering the second
cut for Auto TC. (See pages 4 and 5.)
11. Press Enter to proceed to the next display.
12. The display will now be reading “ENTER CUT
x.xx%” where x.xx is the cut value to be used for
calibration. Press both the Up Arrow and the Left
Arrow keys at the same time to zero the display.
Using the Up Arrow and Left Arrow keys, enter the
grindout value (in the x.xx positions) obtained in
Step 2 above.
13. Press Enter to accept the Cut and to Proceed to
the next display.
14. The display will now read “Manual TC = xxxx,
where xxxx is some number. This is the tempera-
ture compensation (TC) factor. It is what sets the
temperature compensation for Dk changes with
temperature. If you want no compensation, enter
0, otherwise, enter 600 for a 5% unit, 450 for a
10% unit, and 200 for a 25% unit.
15. Press Enter to accept the TC and proceed to the
next display.
16. The display will now read “20 mA = xx.xx%”.
Where xx.xx is the full scale span desired for the
4-20 mA loop. 4 mA will always be equal to 0.00%
water, and the 20 mA value is equal to the water
% entered here. Enter the value desired by using
the up and left arrow keys. Press “Enter” to accept
the 4-20 mA span and to proceed to the next dis
play.
17. The display will now read “Set Pt = x.xx%”.
This is the water cut value at which the relay and
indicator light go to bad oil as shown by the indica-
tor light blinking red. Enter the value with the Up
Arrow and Left Arrow buttons.
18. Press Enter to accept the setpoint and to proceed
with the next display.
19. The display will now read “Delay = xxxx Sec.” This
is the number of seconds the unit will allow bad oil
until the relay goes into bypass. Enter the desired
value with the Up Arrow and Left Arrow buttons.
