User Guide

10
Under normal application, adjustment on this
module may not be necessary.
If routine check is required, the following
procedures shall be performed.
• Follow the procedure at page 7 to per-
form calibration on the transmitter mod-
ule (using a ammeter).
• Simulate a 4.00 mA loop current for the
transmitter (i.e. pH 0.00 as Electrode in-
put) and check for display reading.
• Simulate a 20.00 mA loop current for the
transmitter (i.e. pH 14.00 as Electrode
input) and check for display reading.
Note: when the instrument is used in con-
junction with the Hanna indicator
HI 8510T or controllers HI 8710T,
HI 8711T, the calibration can also be
performed on the indicator/controller.
In this case slight calibration adjust-
ment can be made on the indicator/
controller even if the whole system
calibration is advised, always starting
from the transmitter.