User Guide

11
pH CALIBRATION WITH FIXED
TEMPERATURE COMPENSATION
(HI 8614 & HI 8614L only)
• Take the temperature of the
buffer solutions using a
Checktemp or a thermom-
eter with a resolution of at
least 1°.
• Connect the appropriate re-
sistor to the "TEMP.
PROBE" terminals (see
page 6) depending on the
temperature of the calibra-
tion solution.
• Follow the procedure as outlined in the
calibration with automatic temperature
compensation and use the thermometer
reading to adjust the trimmer until the
ammeter reads the value according to
the following table.
°C
INPUT
-VE LO
O
P
+VE LO
O
P
TEM
P
. PRO
B
E
0
5
10
15
20
25
30
35
40
45
50
55
60
32
41
50
59
68
77
86
95
104
113
122
131
140
4.01
4.00
4.00
4.00
4.00
4.01
4.02
4.03
4.04
4.05
4.06
4.07
4.09
8.576
8.565
8.565
8.565
8.565
8.576
8.587
8.599
8.610
8.622
8.633
8.645
8.667
7.13
7.10
7.07
7.04
7.03
7.01
7.00
6.99
6.98
6.98
6.98
6.98
6.98
12.137
12.103
12.069
12.034
12.023
12.000
11.989
11.977
11.966
11.966
11.966
11.966
11.966
10.32
10.24
10.18
10.12
10.06
10.01
9.96
9.92
9.88
9.85
9.82
9.79
9.77
15.789
15.697
15.629
15.560
15.491
15.434
15.377
15.331
15.285
15.251
15.217
15.182
15.159
°C °FpHmApHmApHmA
Temperature 4.01 pH Buffer 7.01 pH Buffer 10.01 pH Buffer