Chlorine Colorimeter

Lamotte Chlorine Colorimeter 1500 SERIES The 1500 Series of single test, direct reading colorimeters incorporates design advances that enhance reliability, improve accuracy, and simplify the calibration process, all in a portable, hand-held package. Meters are available for ammonia nitrogen, bromine, chlorine, chlorine dioxide, copper, fluoride, iron, manganese, molybdenum, nitrate nitrogen, ozone, phosphate and sulfate.

One of the Lamotte DPD Chlorine Colorimeters that we ordered is no longer functional. It will not give a chlorine reading. When using the tester the results screen shows “nan”. Searching the internet I found that the “nan” means “ not a number” and that the item is defective. How can this be fixed?

Fortunately, there is an easy fix. The NAN code indicates that the meter needs a factory reset.
You can perform the reset as follows:

1. Turn the meter ON.
2. Fortunately, there is an easy fix. The NAN code on the Lamotte Colorimeter indicates that the meter needs a factory reset.
3. You can perform the reset as follows:
4. Scroll to Editing Menu, press ENTER button.
5. Scroll to Factory Setup, press ENTER button.
6. Press the UP button to change the first digit of password to 6 (six).
7. Press ENTER button.Leave the second digit of password as 0 (zero).
8. Press ENTER button.Press the UP button to change the third digit of password to 2 (two).
9. Press ENTER button.Press ENTER button to select “Reset”.
10. Enter password “602” a second time, see steps #4 through #6 above.
11. Display will show “storing”, “working” and will cycle through gains settings as they are reset.
12. After about 10 seconds, the gains and related settings will have reset. The meter will reboot to the main menu and is now ready to use again.

Does the DPD chlorine colorimeter read up or past 50 ppm?

No it does not read that high. Here is the product range:
- 0 to 4.0 ppm Chlorine (may be extended by dilution)
- 0 to 7.0 ppm Bromine (may be extended by dilution)