Output stop – Yokogawa DM8C/VD6 Liquid Density Analyzer User Manual

Page 46

< 4. OPERATION >

4-4

IM 12T03A01-02E

Digital signal (Note 1)

Measuring mode (DSPL)

Maintenance mode (1)
(MAINT)

Maintenance mode (3)
(MAINT)

Transfer to
Calibration mode

(1)

(2)

(3)

While in calibration
computation

Calibration mode
function No. transfer
or waiting for mode
transfer

Calibration mode (CAL)

Function No.
transfer (2)

Calibration start

Calibration end

Output stop

Measured
value

Hold

(Note2)

Measured
value

Hold

Analog signal

(1)

(2)

(3)

Measured
value

Hold

Measured
value

Hold

Note 1:

The density value after temperature conversion, density value at the measuring temperature and measuring liquid

temperature are transmitted in digital form. (Only the density value after temperature conversion is transmitted in analog form.)

Note 2:

The density converter displays CAL-1 or CAL-2.

Figure 4.3

Digital and Analog Signal Output Statuses

Eight function Nos. from ‘3’ to ‘A’ are provided in the calibration mode (see Table 4.1). Among
them, ‘6’ and ‘A’ are to specify the calibration computation and others are to input data required
for the calibration.

Function No. ‘3’: Sets density of calibration solution 1

Density value (g/cm

) of a calibration solution for one-point calibration or 1st calibration of two-

point calibration can be input. The input density is a data at the reference temperature.

(Note) If relation between temperature and density is well known, a density at a temperature

can be set. However, the density data at the reference temperature is recommended to
achieve accurate calibration.

Function No. ‘4’: Sets temperature of calibration solution 1

Input the temperature of the calibration solution 1 of which density at the reference temperature
is set at ‘3’.

Function No. ‘5’: Sets temperature coeffi cient of calibratio solution 1

Enter the value which is -100000 times the temperature coeffi cient (g/cm

/°C) of the liquid for

calibration 1.

(Note) The temperature coeffi cient -0.00086 g/cm3/°C becomes the value 086.

Function No. ‘6’: Starts calibration 1 (press SET key)

Pressing “SET” key executes calibration computation, or also executes the fi rst calibration of the
two-point calibration.

(Note) For calibration procedure, refer to Section 4.4.