Yokogawa EXAxt PH450 4-Wire Analyzer for pH and ORP - Manual (Page 55)

47
IM 12B07C05-01E
9
QUALITY
INSPECTION
2/3
QIS 12B07C05-01E
This test is done on the “HIF” display of “Factory Mode”.
a. Touch the [Setup] icon.
b. Touch the [Commissioning].
c. Touch the [Advanced setup].
d. Touch the [Factory adjustment].
e. Enter a password.
f. Select the [Factory Mode] in “Key.”
g. Select the [HIF] in “Execute.”
Select the [Input1(pH)] in “mV input.” When the standard voltage source to the
corresponding value of “Simulation input (mV)” in Table 1 is set, check the data display
and the value must be within the range shown in Table 1.
Table 1
Simulation input (mV) Check Point (pH) Data Display (pH)
414.1 0 0 ±0.01
0 7 7 ±0.01
-414.1 14 14 ±0.01
After the above test is completed, select the [Input1(ORP)] in “mV input.”
When the standard voltage source to the corresponding value of “Simulation input (mV)”
in Table 2 is set, check the data display and the value must be within the range shown in
Table 2.
Table 2
Simulation input (mV) Check Point (ORP) Data Display (mV)
-1500 -1500 -1500 ±1
0 0 0 ±1
1500 1500 1500 ±1
After the above test is completed, touch the [Exit] to return to the “HIF” display.
3.4 Temperature Indication Check
Following Section 3.3, select the [PT1000] in “Temperature” of the “HIF” display.
In this state, change the resistance of the decade resistance box and check the data
display. The value on the data display must be within the range shown in Table 3.
Table 3
Temperature (°C)
Resistance (Ω) of
Decade Resistance Box
Data Display (°C)
–10 960.9 –10 ±0.3
25 1097.3 25 ±0.3
120 1460.6 120 ±0.3
After the above test is completed, touch the [Exit] to return to the “HIF” display.
3.5 Current Output Test
Following Section 3.4, select the [Check] in “mA outputs” of the “HIF” display. “Set value
4.000 mA” appears at the bottom of the display. Select “Next value” in the “Command”
and touch “Enter,” the value on the data display increases in steps of 4 mA. Check the
current outputs 1 and 2 corresponding to the data display, the current output must be
within the range shown in Table 4.