Tanaka APM-7 Maintenance Manual - page 13
12
２
.３ Displaying Temperature Unit and Temperature Correction
２
.３.１
Displaying Temperature Unit
APM-7 is capable of displaying temperature in degree C and degree F. When APM-7 is shipped
out, temperature unit is set to degree C as default, and it can be switched to degree F as follows:
(1)
Press Right-Left key to select Temp cal (blinking) from the MENU screen, then press
FUNCTION key. The following Temperature Calibration Screen will appear.
(2)
Press Right-Left key to brink the temperature unit, then change the unit by pressing
Up-Down key.
(3)
Press RESET key to return.
Fig. 7 Temperature Correction Screen
２
.３.２ Temperature Calibration
(1) Preparation
(a) Prepare ASTM-9C and 10C mercury-in-glass thermometer. (Use ASTM 9F and 10F when
the temperature unit setting is
o
F, and convert following temperature value to degree F.)
(b) loosen 4 screws, then lift Arm Cover upward.
(c) Remove the Flash Detector from Test Cover carefully and keep it away from the Cover.
Note that the tip of Flash Detector is easily broken.
(d) Set a standard glass thermometer (ASTM 9C) through the Flash Detector Collar so that
the tip of thermometer positioned 43 - 46 mm away from inner wall of Test Cover. A silicon
stopper is useful to fit the thermometer.
(e) Record present filament output value, then set it to “0”. See ２.１.
(2)
Temperature Data Recording
(a) Pour gas oil into sample cup then set it to the APM-7.
(b) Set Expected Flash Point at 100
o
C.
(c) Press “START” key to start a calibration.
(d) Record displayed temperature at every 10
o
C of thermometer readings.
(e) Press the “COOL” key to stop heating after complete the recording.
(f) change the sample to salad oil, and the thermometer to ASTM 10C, set Expected Flash
APM Temp cal
Temp unit(
o
C)
Temp
(
o
C)
POS 0 40 80
Offset +0.0 +0.0 +0.0 +0.0