APPENDIX C
Calibration certificates of equipment
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ETS-TESTCONSU
LT LI MITED
Performance Chec
k / Calibration of Multinarameter
W
ater Oualitv Meter
Equiprnent
Ref. No
Model No.
Date
of Caliblation
ET/EW/O08/010
Manufactuler
Selial
No.
Caliblation Due
Date
YSI
Pro DSS
18E10s421
216/2023
11912023
Results
1. Tempelatule
(Method
Reference:
Section
6
of
internation
Accleditation
New Zealand
Technical
Guide no.
3 Second
edition March
2008:
Working
Therrnometel
Calibration
Procedure)
Tolerance
Lirnit
('C):
+
2.0
2.pH
ethod
Rel'elence:
APFIA l
ged
4500-FI+
B)
Tolerance
Limit
(pH
unit):
+
0.10
3. Conductivity
(Method
Reference:
APFIA 19ed 2510
B
Tolerance
Limit
(pS/cm):
+
10.0%
4.
Salinity
(Method
Reference:
APHA 19ed2520
B)
Expected Reading
(g/L) Displayed
Reading
(g/L)
Tolerance
(%)
10.0
9.97
-0.3
20.0
19.68
-1.6
30.0
30.04
0.1
Tolerance
Limit
(g/L):
t
10.0%
Reading
of Reference
Thermornetel'
('C) Displayed
Reading
("C)
Tolerance
(oC)
15.6
15.7
0.1
2s.1
25.2
0.t
29.3
29.2
-0.1
Tolelance
(pFI
unit)
Displayed
Reading
(pH
unit)
Expected
Reading
(pH
unit)
4.00
6.86
9.18
Tolerance
(%)
Displayed
Reading
(pS/cm)
Expected Reading
(pS/cm)
+0.3
145.2
145.6
+0.6
1423
1414
+0.8
1 3004
12892
-0.6
56393
s6761
Page I of2
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H#e&ilsmH€RAA
ETS.TESTCONSULT
LI MITED
ration of Multinarameter Water
Performance Check / Calib
Oualitv Meter
Equipment
Ref. No
Model No.
Date
of Calibration
Manufacturer
Serial
No.
Calibration
Due
Date
ET/EW008/010
Pro DSS
2/612023
YSI
I 8E105421
1/912023
5.
Dissolved
Oxygen
(Method
Refereuce:
APHA
19ed 4500-O
G)
Expected
Reading
(np.lL)
Displayed
Reading
(mg/L)
Tolerance
(rne/L)
1.73
I .81
+0.08
4.62
4.49
-0.1
3
5.91
s.86
-0.05
Tolerance
Limit
(mgil):
+
0.20
6. Turbidity
Reference:
APHA 19ed
2130 B)
Tolerance
Limit
(NTU):
t 10.0%
Tolerance
(%o)
Displayed
Readins
(NTU)
Expected
Reading
(NTU)
+2.0
10
10.2
+1.75
40.7
40
+2.5
102.5
100
-0.70
397.2
400
The equipment
cornplies
n
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#
with
the specified
requirements
and
is deemed
acceptable
#
/
unaeeeptabl+#
for use
o
D.l.t.
as appropriate
Calibrated
by
Approved
by
Page
2 of 2
