Yokogawa DM8C/VD6 Liquid Density Analyzer - Manual (Page 45)

< 4. OPERATION >
4-3
IM 12T03A01-02E
4.2 Operation
4.2.1 Operation Mode
Operation of the Model DM8 vibration type density meter ruled by the mode as shown in Table 4.1.
Measuring mode (DSPL), calibration mode (CAL) and maintenance mode (MAINT) are transferred
with the mode transfer switch.
Table 4.1 Operation Modes and Function No.
MODE SW
FUNCTION
NO.
Contents Display
Measuring
mode
(DSPL) No display
1
2
Displays density (at reference temperature)
Displays density (measured value)
Displays measuring liquid temperature g/cm 3
g/cm 3
°C
Calibration
mode (CAL) 3
4
5
6
7
8
9
A
Sets density of calibration solution 1
Sets temperature of calibration solution 1
Sets temperature coeffi cient of calibratio solution 1
Starts calibration 1 (press SET key)
Sets density of calibration solution 2
Sets temperature of calibration solution 2
Sets temperature coeffi cient of calibratio solution 2
Starts calibration 2 (press SET key) . g/cm 3
. °C
–x10 -5 g/cm 3 /°C
CAL-1 (displays density after calibration)
. g/cm 3
. °C
–x10 -5 g/cm 3 /°C
CAL-2 (displays density after calibration)
Maintenance
mode
(MAINT) 1.
2.
3.
4.
5.
6.
7.
8.
9.
A.
B.
C.
D.
Canceles protect (enter 77)
Displays frequency (density)
Displays frequency (temperature)
Checks output signal
Checks LED (press SET key)
Sets low limit of the output range
Sets high limit of the output range
Sets reference temperature of measuring liquid
Sets temperature coeffi cient of measuring liquid
Sets detector constant A
Sets detector constant B
Displays detector calibration coeffi cient C (span)
Displays detector calibration coeffi cient D (zero) 7 7
Hz
Hz
 %
- LED - (fl ash 5 times)
. g/cm 3
. g/cm 3
. °C
–x10 -5 g/cm 3 /°C


(1) Measuring mode (DSPL): Mode for normal operation
An analog output in this mode is density value at the reference temperature.
Moreover, density value at measuring liquid temperature and temperature of measuring liquid
are digitally output. The density value at the reference temperature (without function No. display),
the density value at measuring liquid temperature (No.1) or the measuring liquid temperature
(No.2) can be displayed by selecting function No. Use FUNCTION key to select the FUNCTION
No.
(2) Calibration mode (CAL): Mode for calibration. Sets or specifi es data required for
calibration.
During this mode the analog and digital outputs are held (at the values just before the holding).
However, digital data output stops during calibration function No. ‘6’ or ‘A’.
When calibration computation ends holding is released and measured data are again output until
function No. ‘6’ or ‘A’ is transferred to another No.