Veris Technologies MSP EC and pH (1997-2008 floppy disk drive 1.02E) - Operating Instructions - Manual (Page 19)

Veris Technologies
Pub. #OM MSP03-1
19
2) Signal Continuity – To properly measure conductivity, good electrical signal continuity
must be present from the coulter electrode to the instrument. The Implement Test Box
(Part No. 10759) allows you to quickly check this.
Use the following method:
a) Connect the signal cable to the terminal on the test box.
b) Touch one lead of an ohmmeter to the #1 coulter blade (left hand, standing behind
the unit) and the other lead to the #1 terminal on the test box. A reading of less than
2 ohms is normal.
c) Continue to check each coulter electrode in succession, left to right.
d) If any coulter electrode exhibits no continuity or resistance higher than 2 ohms, refer
to the maintenance or trouble shooting sections for possible causes.
Note: It is advisable to perform this test on a routine basis (weekly or every 20-25 hours
of data collection) to ensure you are obtaining reliable data.
Instrument Signal Testing – The Veris MSP pH Manager is shipped with an Instrument Test Load
(Part No. 10447) that will enable you to quickly check the instrument to ensure that it is functioning
properly. To perform this test, do the following:
1) Disconnect the signal cable from the 9-pin (signal) terminal on the instrument.
2) Connect the test load to the signal terminal.
3) Switch on the unit and go into “data acquisition” mode.
4) The display should show: (approx.)
Shallow 3
Deep 27
Connect to
coulter blade
Ohmmeter
Connect one lead to Test
Box terminal (corresponding
to each coulter)
no
continuity
grounded
bolt
coulter
terminal