TC815CBU View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
TC815CBU
Microchip Technology
TC815CBU Datasheet PDF : 26 Pages
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TC815
5.0 MANUAL RANGE SELECTION
The TC815 voltage and resistance auto-ranging fea-
ture can be disabled by momentarily bringing RANGE
(Pin 59) to digital ground potential (Pin 58). When the
change from auto-to-manual ranging occurs, the first
manual range selected is the last range in the Auto-
Ranging mode.
The TC815 power-up circuit selects auto-range opera-
tion initially. Once the manual range option is entered,
range changes are made by momentarily grounding
the RANGE control input. The TC815 remains in the
Manual Range mode until the measurement function
(voltage or resistance), or measurement option (AC/
DC, Ω/LOΩ) changes. This causes the TC815 to return
to auto-ranging operation.
The “Auto” LCD annunciator driver is active only in the
Auto-Range mode. Table 5-1 shows typical operation,
where the manual range selection option is used. Also
shown is the extended resolution display format.
Also see Figure 5-1 through Figure 5-3.
TABLE 5-1: MANUAL RANGE OPERATION
DC Volts
AC Volts
Input
23.5V
18.2V
Power-on
Auto-Range
Operation
Manual Operation
Range
200mV
2V
20V
200V
Display
“1”00.0V
1.000V
“1”0.00V
23.5V
Range
2V
20V
—
—
Range
“1”000V
18.20V
—
—
Input
DC Volts
23.5V
AC Volts
18.2V
# of Range
Changes
(See Note 4)
Range
Display
Range
Range
Ohm
18.2kΩ
Display
200Ω
2kΩ
20kΩ
—
Range
“1”00.0Ω
“1”.000kΩ
18.20Ω
—
LO Ohm
2.35MΩ
Range
2kΩ
10kΩ
200kΩ
2000kΩ
Display
“1”.000kΩ
“1”.0.00kΩ
“1”.00.0kΩ
“1”350kΩ
Ohm
18.2kΩ
LO Ohm
2.35MΩ
Display
Range
Range
Display
1
200V
23.5V
20V
18.20V
20kΩ
18.20V
2000kΩ “1”350kΩ
2
200mV
“1”00.0V
2V
“1”.000V
200Ω
“1”00.0ΩkΩ
2kΩ
“1”.000kΩ
3
2V
1.000V
20V
18.20V
2kΩ
“1”000kΩ
20kΩ “1”0.00kΩ
4
20V
“1”3.50V
20V
18.2V
20kΩ
18.20kΩ
200kΩ “1”00.0kΩ
5
200V
23.5V
600V
19V
200kΩ
18.2kΩ
2000kΩ “1”350kΩ
6
1000V
24V
2V
“1”.000V
2000kΩ
19kΩ
2kΩ
“1”.000kΩ
7
200mV “1”00.0mV
20V
18.20V
200kΩ
“1”00.0Ω
20kΩ “1”0.00kΩ
8
2V
“1”.000V
200V
18.2V
2kΩ
“1”.000kΩ 200kΩ “1”00.0kΩ
Note 1: A flashing MSD is shown as a “1”. A flashing MSD indicates the TC815 is over-ranging if all other digits are zero.
2: The first manual range selected is the last range in the Auto-Ranging mode.
3: A flashing MSD with a non-zero display indicates the TC815 has entered the Extended Resolution Operating mode. An
additional 1000 counts of resolution is available. This extended operation is available only in manual operation for voltage,
resistance and current measurements.
4:
= Momentary ground connection.
DS21474B-page 12
© 2002 Microchip Technology Inc.
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