Hach POCKET COLORIMETER II Instruction Manual

1—52
Specê Secondary Standards for DPD Chlorine, continued
Note:
Before proceeding, make sure the instrument is in the low (LR) range channel.
See Switching Ranges on page 2—4.
Using the Spec√ Standards
1. Place the colorless Spec√ blank into the cell holder with the alignment
mark facing the keypad. Tightly cover the cell with the instrument cap.
2. Press
ZERO. The display will show “0.00”.
3. Place the STD 1 cell into the cell holder. Tightly cover the cell with the
instrument cap.
4. Press
READ/ENTER. Record the concentration measurement.
5. Repeat steps 3 and 4 with cells labeled STD 2 and STD 3.
6. Compare these measurements with previous measurements to verify the
instrument is performing consistently. (If these are the first measurements,
record them for comparison with later measurements.)
Note: If the instrument is user-calibrated, initial standard measurements of the Spec√
Standards will need to be performed again for the user calibration.
5957088.book Page 52 Friday, March 22, 2013 3:54 PM

Hach POCKET COLORIMETER II Specifications

General

Measurement Method	Colorimetric
Display	LCD
Operating Temperature	0 to 50 °C
Storage Temperature	-40 to 60 °C
Waterproof Rating	IP67
Weight	0.23 kg
Light Source	LED
Range	Varies by parameter
Wavelength	Varies by parameter
Battery Life	Approximately 2000 tests