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2.3.7.3 Notices in the state of key lock
When the instrument is in the state of key lock, all the keys are not available. Do
not think that the instrument is defective. Please operate as §2.3.7.2 says, to
return to the normal state.
2.3.8 Safeguard
TH2810B has RAM inside, which stores some parameters so that they would
lose easily. And the parameters can be stored in RAM are as follows:
1. Measurement frequency, short & open correction parameters at the time of
measuring level;
2.
Nominal value and limits;
3.
State values at the time of key lock.
2.4
Parameter setup
1. Press LIMIT once in the state of “MEASUREMENT” to enter “parameter
setup”.
2. Parameter symbol is displayed in Display B, and the set value of last time is
display in Display A and unit, with one digit flickering, which is modification digit
(
∧
,
∨
are operated to move point if the value is decimal, and could be used to
select the unit if unit indicator is flickering.)
3. Operate
＜
and
＞
to flickering digit, and change the value through
∧
and
∨
keys.
4. Press LIMIT to modify the next parameter, or press START to store the value
and exit to the state of “MEASUREMENT”.
5. Repeat the above operations until completing setting all the parameters.
Note: High and low limits are set in the mode of percentage deviation. (Refer to
§2.2.4.2
%
△
). And the limit’s first number means sign (“0” for positive, and “1”
for negative). For example, capacitance with nominal value of 100pF is sorted,
and the range is 97pF – 105pF, then the range in %
△
is -3% - 5%.
No.
Name
Display A
Display B
Note
1 nominal
value
5-digit
number
+ 1-digit
decimal point +
1-digit unit
Inductance (LS),
capacitance (CS),
resistance (rS),
impedance (ZS)
2 high limit of
dissipation or low
limit of quality factor
5-digit number
+ 1-digit
decimal point
Dissipation (d
-
),
quality factor (q
-
)
Positive
always
3
high limit of pin 1
P1
-
4
low limit of pin 1
P1
-
5
high limit of pin 2
first-digit sign +
4-digit number
+ 1-digit
P2
-
only
