Azbil ALTJ 9000 Series, User Manual, Page: 35 / 68

8-1
Chapter 8 Calibration
This chapter describes the calibration work conducted by Azbil or a designated service station. Normally, calibra-
tion is not done by the user because a precision reference input device and measurement instrument are needed.
However, calibration is described here in case the user has no choice but to do it. Two kinds of calibration are
described below.
„
Calibrating the Output Signal
y
Preparation
Calibration of the output signal (adjustment of D/A conversion section) is not needed in
normal operation. Therefore, this procedure should normally not be done. If this type of
calibration is necessary, the following equipment is needed.
y
Equipment
y
Precision ammeter: 0.04 % F.S. or better
y
Precision resistor: 250 Ω
y
Communicator: CommStaff
y
Wiring for Calibration
Do the wiring while referring to the figure below. Inspect the connections to make
sure that the wiring is connected correctly and that the device and communicator are
communicating.
„
Connecting the Communicator (CommStaff) (Page 7-2)
24 V DC
power
+
−
Fig. 8-1. Wiring for calibration of output signal
y
Calibration Procedure
Connect the output signal to the ammeter and compare the values in order to calibrate for
0 % and 100 % of the analog output. For details, refer to the user's manual for the commu-
nicator shown below.
y
Field Communication Software CommStaff Model: CFS100 Instruction Manual (Smart
ALTJ™ 9000 Immersion-type Liquid-Level Device Edition), No. CM2-CFS100-2014
250 Ω
SUPPLY-
Black wire
Red wire Precision ammeter