Practical Instrument Electronics 850 - Manual (Page 25)

Page 23
Pr
eliminar
y
pH SOURCE
Choose this function to provide an output from 0.000 to 14.000
pH @ 25°C (77°F) which corresponds to 414.12 to -414.12 mV.
The source current is a nominal 20 mA to provide the driving
power to your pH receivers.
Move the power switch w to SOURCE then Double Click the
EZ-DIAL knob to get into the Menu. Turn the knob to scroll
through the settings and press the knob to make your selection.
Select pH for the FUNCTION.
Connect the output leads of the PIE 850 to the inputs of the
device being calibrated, making sure to check polarity. Red lead
from the mV (+) jack of the 850 to the plus (+) input and black
lead from the mV (-) jack to the minus (-) input.
Instantly output your SPAN and ZERO output settings by moving
the EZ-CHECK switch between HI and LO. You may also select
any third output setting (such as mid-range) using the DIAL
position on the EZ-CHECK switch. The output is adjusted in
0.001 pH increments by turning the knob
e . Press and turn the
knob for faster dialing with 0.100 pH increments.
pH Receiver Input
Controller
Transmitter
Analyzer
ACID
4.010
pH
2 1 + -
T/C
All mA∙ Read V
-
2 3
RTD
Ω
RTD
Ω
6 5
4
+
Source & Read Hz∙ mV
Source V∙ pH
- +
1
-
pH Source