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Performance Check / Calibration of Multinarameter Water Oualitv Meter

Equiprnent Ref. No.

Model No.

Date of Calibration

ET/EW008/010 Manufactuler

Serial No.

Calibration Due Date

YSI

Pro DSS 18E105421

21612023 l/912023

Results

1. Temperatule

(Method Reference: Section 6 of intelnation Accleditation New Zealand Technical Guide no. 3 Second edition March 2008

Working Thermometel Cal ibration

Tolerance Limit ("C): + 2.0

2,pH

Reference: APFIA 19ed 4500-H+ B)

Tolerance Limit (pH unit): + 0.10

3. Conductivity

Reference: APFIA 19ed 2510 B)

Tolerance Limit (pS/cm): + 10.0%

4. Salinity

(Method Reference: APHA l9ed 2520 B)

Expected Reading (g/L) Displayed Reading (g/L) Toletance (o/o)

10.0 9.97 -0.3

20.0 19.68 -1.6

30.0 30.04 0.1

Tolelance Limit (g/L): + 10.0%

Tolerance (oC)

Reading of Reference Thermometer' (oC) Displayed Reading ("C)

0.1

15.6 15.7

25.2 0.1

2s.1

-0.1

29.3 29.2

Tolerance (pl-l unit)

Expected Readine (pH unit) Displayed Reading (pH unit)

4.00

6.86

9.1 8

Displayed Reading (pS/cm) Tolemnce (7o)

Expected Reading (pS/cm)

145.6 +0.3

145.2

+0.6

1414 1423

+0.8

12892 13004

56393 -0.6

56761

Page I of2

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Performance Check / Calibration of Multinarameter Water Oualitv Meter

Equipment Ref. No.

Model No.

Date of Calibration

Manufacturer

Serial No.

Calibration Due Date

ET/EW/008/010

Pro DSS

2/6/2023 U9t2023

YSI

I 8E1 05421

5. Dissolved Oxygen

Reference: APHA 19ed 4500-0 G)

Tolerance Limit (mgll-): + 0.20

6. Turbidity

(Method Reference: APHA l9ed 2130 B

Tolerance Limit (NTU): x10.0%

Displayed Reading (ms./L) Tolerance (me/L)

Expected Reading (mg/L)

+0.08

1.73 1.81

4.49 -0.1 3

4.62

-0.0s

s.91 5.86

Tolerance (o/o)

Expected Readins (NTU) Displayed Reading (NTU)

10.2 +2.0

+1.75

40 40.7

102.5 +2.5

100

-0.70

400 397.2

The equipment complies # / dees-ne+eomply # with the specified requirements and is deemed acceptable # / una€€€ptabl.e-# for use.

u Delet. as appropriate

Calibrated by Approved by

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