6
Top Side:
1. Socket of Power (DC 12V)
2. RS232 (Optical Interfaced) Port
3. Min DIN output Port
4. Sockets of K type thermocouples T1
5. Sockets of K type thermocouples T2
Fig. 2
4. Turn on and off Model 48R:
Off Position
Power is off when the “Rotary Switch” points to the upper center, the position marked with
“
{
” Turning the Rotary Switch from the “
{
” position to any other position automatically
turns on Model 48R. Numbers and marks appear in the LCD Display.
When APO (Auto Power Off) is enabled (refer to 6.2.1 for enable and disable of APO), power
is automatically turn off if no operation for a period of time. (factory setting = 10 min. reset by
user).
Indication of APO
enabled.
3
2
5
1
4
11
6. Function of Push Buttons
There are three operation modes in this meter, namely, Normal Mode, Shift Mode and Setup
Mode.
Push buttons perform different functions in different operation modes.
6.1 Normal Mode
This is the default mode of the push buttons, push buttons are in this operation mode right after
the meter is turn on. Functions of push buttons in this operation mode are printed on the top of
each push button in white color.
6.1.1 “
” --- Backlight
1. Press “ ” button to turn on and off the backlight of LCD.
2. It will auto off by setting time of backlit.
6.1.2 “
/
” --- DC/AC selection
When Rotary Switch points to one of the positions of Voltage (V /
) or Current Ranges
Pressing (A /
).
Press “ /
” button to toggle between AC and DC. The annunciator AC or DC shows at the
left-middle of LCD.
6.1.3 “
H
HOLD” --- Data Hold
Press “
H
HOLD” button to hold the data shown at that moment on the display. An annunciator
“
H
” shown in the lower-right part of the display.
Press again to release the data hold and back to normal operation.
6.1.4 “REL
Δ
” --- Setting reference value for Relative Value Measurement
Press “REL
Δ
” button to store current value as the reference, next measurement will display the
relative value against this reference. An annunciator “
Δ
” shows at the lower-right part.
Press and hold the button for 2 sec to clean the reference value and leave the Relative Value
Measurement Mode.
Press “REL
Δ
” button, in Relative Value Measurement Mode, to replace the reference value
with absolute value of current measurement.
Indication of
ALM
Indication of
DC or AC
Annunciator of
MAX/MIN Mode
Annunciator of
Relative Mode
Annunciator of
Data Hold Mode
Indication of
°
C or
°
F
