Verify Using Dry Standard Cvm; Zero Point Setting - Hach ULTRATURB sc User Manual

4.6 Verify using dry standard CVM

4.7 Zero point setting

1. Open the MAIN MENU.
2. Choose SENSOR SETUP and accept.
3. Choose the related sensor and accept.
4. Choose VERIFY and accept.
5. Choose STANDARD and accept.
6. Shut-off the feed and accept TURN OFF SAMPLE INLET.
7. Drain the measuring chamber via the lower feed union and accept DRAIN
MEAS. CHAMBER.
8. Open the screw top and remove the sealing plug and wiper holder.
9. Carefully dry the measuring chamber.
10. Clean the CVM module with a cloth ( included in the accessory setof the CVM
modul).
11. Guide the CVM module into the measuring chamber.
The arrow mark must point downwards!
Ensure that the spring-loaded ball engages by turning slightly in the sample
feed opening on the measuring chamber, see Figure).
Accept INSERT CVM DRY STANDARD.
12. Accept x.xxx TRBFNU.
13. Remove the CVM module and accept REMOVE CVM MODULE .
14. Re-fit the sealing plug and wiper holder and accept REPLACE WIPER
HOLDER AND CAP.
15. Screw back on the screw top and accept TIGHTEN CAP.
16. Re-connect the feed and accept CONNECT SAMPLE INLET.
17. Open the feed and accept VER. READY OPEN INLET.
18. Accept OUTPUT ACTIVE.
1. Open the MAIN MENU.
2. Choose SENSOR SETUP and accept.
3. Choose the related sensor and accept.
4. Choose CALIBRATE and accept.
5. Choose OFFSET and accept.
6. Shut off the feed and drain the measuring chamber. Connect a membrane
filter (LZV325) to the measuring chamber feed. Open the feed and accept
POUR 0 STD INTO MEAS. CHAMBER.
7. Accept PRESS ENTER WHEN STABLE x.xxx TRBFNU.
8. Set the zero point and accept CALIBRATE (x.xxx TRBFNU).
9. Accept CAL READY OUTPUT ACTIVE.
Operation
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