Veris Technologies pH Manager - Operating Instructions - Manual (Page 48)

Pub.# OM17-MSP-pH
6-3
4. Wash system malfunctioning: no water being pumped
-are there at least 10 gallons of water in tank?
-are pumps running? If not, check electrical connections and 12 volt power to them
-check pressure switch on pump
—wiggle wire, disconnect and reconnect; direct wire if needed
-is filter plugged?
-is ball valve open?
-disconnect quick couplers to help pumps prime
5. pH readings seem erroneous or won’t calibrate
-Use pH simulator to test External Controller and Veris instrument. Re-test with pH simulator
set to High Impedance
Figure 5
-check for moisture around BNC connectors and for proper installation and fit of the BNC cover
over BNC connections (if the pH simulator readings are not close to the default settings, blow
compressed air into BNC ports on external control module)
6. Sampling shoe plugging
-verify if shoe is plugged: wash electrodes to create a wet sample in the shoe; in manual mode
lower sampler to full depth and drive forward; if soil in the sampling trough is now dry, fresh soil
has entered and the shoe isn’t plugged
-to clean plugged shoe, raise implement, lower shoe manually to maximum depth, and drive
forward at high rate of speed as you lower the implement completely; if it doesn’t clear, clean
manually (put transport locks in before working under unit)
-clean cutting shoe thoroughly, especially if it has dried mud in it
-check cutting shoe and scraper for wear; replace as needed
-check scraper adjustment by manually raising and lowering sampler assembly. Does scraper
completely clean the cutting shoe face? See Field Operation section for proper adjustment
-adjust row cleaner to clear residue more completely
-adjust firming wheel down to firm soil
-lower sampling depth to engage soil with better coring properties
7. pH readings are repeatedly >.5 different or are slow to settle,
-check shoe for sample quality. If only a small amount of soil is present, reduce field speed to
retain adequate core. If crop residue is present, adjust cleaning disks to reduce crop residue in
sampling area.
Use pH simulator to test external controller and Veris
instrument.
On/Off key (Turn pH simulator OFF when test is completed)
Attach to each BNC port to test each circuit
Press Select button to toggle from 4 to 7 to 10. Light above pH
value will light. View Veris display to confirm these readings
at each simulator setting:
4 should read -2, 7 should read .6, and 10 should read 3.9.
(Note: the simulator is designed for glass electrodes; for
antimony the readings are those listed above)